Golden Alga Bloom Status Reports

Please note: Evidence of a fish kill due to golden alga may be difficult to track and discover. Large numbers of small fish may be killed, and predators such as birds and raccoons can eat the large dead fish before they are observed or counted. Additionally, the dead fish sink below the surface very quickly; this also interferes with complete counts. For this reason, an area that had large numbers of dead fish one day may show nothing the next day, while other areas that are without dead fish may have large numbers of fish die soon after. These rapid changes necessitate quick notification of kills. Accurate numbers are only as good as the evidence available on the scene. The public is asked to please report all dead or dying fish and wildlife as soon as possible to the Texas Parks and Wildlife Department. Call one of the 24-Hour Communications Centers (512-389-4848 (Austin) or 281-842-8100 (Houston)), one of the Kills and Spills Team biologists, or your local Game Warden.

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Golden Alga Update

September 25, 2014

Lake Colorado City - An on-going fish kill at Lake Colorado City was reported by Lake Colorado State Park staff. Approximately 300-500 fish have died and are at different stages of decay. The fish range from large carp to small sunfish/bait fish. They are believed to have died near the dam/southern end of the lake based on two days of strong northwestern wind, which has pushed the fish onto the state park shoreline. Two water samples collected for golden algae (Prymnesium parvum) contained high cell concentrations and was characterized as highly toxic.

January 30, 2014

Brazos River Basin – Lake Sweetwater is currently experiencing a fish kill. Affected species are mostly forage fishes. TPWD is monitoring the situation and will plan to do recovery stockings once the golden alga bloom subsides. 

January 27, 2014

Colorado River Basin –TPWD investigated a fish kill on Lake E.V. Spence that was dominated by shad, sunfish and silversides. Water samples indicated dense golden alga bloom; characterized as highly toxic.

September 9, 2013

Colorado River Basin – Things are quiet along the Colorado. Water samples collected from Lake Colorado City State Park, Moss Creek and Lake E.V. Spence all contained low to moderate cell concentrations and nontoxic water.

September 3-4, 2013

Red River Basin – Lake Arrowhead was sampled at the state park and Deer Creek. No P. parvum were found in either sample. A number of sites along the Red River were sampled as well; very high cell concentrations were found at County Road 2940 but the water was not toxic. Moderate cell concentrations and nontoxic water were found Highway 79 and Highway 81, and low concentrations and nontoxic water were found at Ketchum Bluff.

July 2013 – Brazos, Colorado and Red River basins

Brazos River Basin – Lake Possum Kingdom
A water sample collected at the dam on June 25 contained low concentrations of P. parvum and nontoxic water.

Colorado River Basin – Lake Colorado City, Moss Creek Reservoir, E.V. Spence Reservoir
Three sites along the Colorado were sampled on July 1. Water from Lake Colorado City State Park contained moderate cell concentrations and moderately toxic water. The Moss Creek boat ramp and Wildcat Recreation Area at Lake E.V. Spence both contained moderate cell concentrations and slightly toxic water.

Red River Basin – Lake Texoma
Water samples were collected June 18. The highway 377 sample had moderate P. parvum concentrations and nontoxic water, while the sample collected at the island contained low cell concentrations and slightly toxic water.

May 1-9, 2013 – Brazos and Rio Grande Basins

Brazos River Basin – Water collected on Wednesday from the Possum Kingdom dam contained low concentrations of golden alga in a mixed algal community; the water was not toxic. A minor fish kill consisting mostly of shad is occurring on Squaw Creek Reservoir. Three water samples were collected on May 1; all samples contained low to moderate concentrations of P. parvum and toxicity ranged from low to moderate as well.

Rio Grande Basin – On Monday, May 6, Salt Creek was sampled at FM 652. Algal densities were low overall and no P. parvum cells were found.

April 16-17, 2013

Colorado River Basin
Water samples were collected from a number of sites along the Colorado River on Wednesday, April 17. Lake Colorado City State Park, Moss Creek Lake, Twin Buttes Reservoir and E.V. Spence Reservoir had no P. parvum. Lake Nasworthy contained low concentrations of the alga. All sites had nontoxic water.

Brazos River Basin
A water sample collected Tuesday, April 16 from the dam at Possum Kingdom Reservoir contained no P. parvum cells and nontoxic water. Three sites on Lake Whitney were also monitored; McCown Valley Park, Steele Creek and Lofers Bend all has nontoxic water and low concentrations of P. parvum.

April 1-12, 2013 – Brazos and Rio Grande basins

Brazos River Basin

Possum Kingdom Reservoir – On Thursday, April 11, water samples were collected from the dam, Johnson Road, Sandy Beach and the Deep Elm Arm. P. parvum concentrations were low and the water was nontoxic.

Lake Granbury – Water samples collected April 11 from the dam, FM 51 and US 377 all contained low cell concentrations and nontoxic water.

Lower Brazos River – No P. parvum were found in samples collected April 2 from US 59 at Richmond, Brazos Bend State Park or Brazoria County Road 849.

Rio Grande Basin

Lake Ascarate - Water samples collected Monday, April 1 from the bridge, duck pond and boat ramp all contained moderate concentrations of P. parvum cells and nontoxic water.

March 21, 2013 – Brazos River Basin

Water samples collected Monday at FM 200 near Glen Rose contain moderate concentrations of P. parvum and moderate-high toxicity.

Dead shad, yellow water and foam were reported Thursday on Lake Possum Kingdom, particularly in the areas of Cedar Creek, Caddo Creek and South D and D. Golden alga is the suspected cause. Water samples collected on Monday found low concentrations of P. parvum and nontoxic water at the dam, FM 51 and U.S. Highway 377.

March 14, 2013 – Brazos River Basin

The fish kill on the Clear Fork of the Brazos River has been confirmed to be P. parvum-related. The water sample contained highly toxic water and very high concentrations of P. parvum.

Fish kills have been reported on Lake Granbury and on the Paluxy River at Glen Rose. P. parvum is suspected but not confirmed at this time.

Three sites along the lower Brazos River were sampled on March 13: Highway 59 at Rosenberg, Brazos Bend State Park and Brazoria County Road 849. P. parvum was not found in any of the samples.

March 12-13, 2013 – Brazos and Colorado basins

Brazos River Basin – Biologists are investigating a fish kill on the Clear Fork of the Brazos downstream of Eliasville. The fish are a mixture of old dead and fresh dead. Golden alga is suspected but has not been confirmed at this time.

Colorado River Basin – A water sample taken at Lake Colorado Colorado City State Park contained low cell concentrations of P. parvum, while samples taken at the Moss Creek boat ramp and Lake E.V. Spence at Wildcat Creek contained no cells. All water was nontoxic.

March 5-6, 2013 – Brazos River Basin

Lakes Possum Kingdom and Whitney

Samples were collected at Possum Kingdom. No P. parvum cells were found at Johnson Road or the Deep Elm arm, and samples taken at the dam and Sandy Beach only contained low cell concentrations. All samples contained nontoxic water.

Sampling on Lake Whitney yielded both toxic and nontoxic water. Moderate cell concentrations and moderately toxic water were found at the SH 174 bridge. Moderate concentrations were also found at Steele Creek, but the water was nontoxic. Low concentrations and nontoxic water were found at FM 1713 and the Nolan River. No cells were in the sample collected from the dam.

February 20, 2013 – Rio Grande Basin

Lakes Balmorhea and Ascarate

Lake Balmorhea was monitored on Wednesday, February 20; no P. parvum cells were found and the water was nontoxic. The news is not so good for El Paso’s Ascarate Lake. Samples collected February 20 at the fire station, the bridge and the boat ramp all contained moderate concentrations of p. parvum and the water was found to be moderately to highly toxic. Due to the toxic bloom, TPWD has decided not to stock 2000 rainbow trout into Ascarate Lake as planned. Those fish will instead go into the lake at Comanche Trails Park in Odessa.

February 15, 2013 – Red, Brazos and Rio Grande Basins

Red River Basin – Two samples were collected from Plum Lake on Wednesday, February 13. One contained no P. parvum cells and the second contained low numbers of cells; the water was not toxic in either sample and both contained lots of sediment and a diverse algal community.

Brazos River Basin – Lakes Whitney and Granbury

Water samples were collected Tuesday, February 12 at Lake Whitney. The Steele Creek location contained no P. parvum cells. McCowan Valley and Lofer’s Bend both had low concentrations of P. parvum but the water was not toxic and the algal community was diverse.

A fish kill has been occurring at Lake Granbury since the end of January. The makeup of the event has differed from typical golden alga events; most of the dead fish have been carp, gar, catfish, drum and crappie. Only a few minnows and shiners have been found. Water samples collected on Wednesday, February 6 confirmed the presence of P. parvum; low concentrations and slightly toxic water were found at the dam, with moderate to high concentrations at FM 51 and Highway 377. The FM 51 and Highway 377 sites also had highly toxic water.

Rio Grande Basin – Salt Creek was sampled at FM 652. Algal densities were low overall and no P. parvum cells were found.

November 2012 – Brazos, Rio Grande and Colorado River Basins

Brazos River Basin – Water collected on November 6 from the Possum Kingdom dam contained low concentrations of golden alga in a mixed algal community; the water was not toxic.

Rio Grande Basin – Salt Creek was sampled at FM 620 on November 14. No golden alga cells were in the water sample and the water was not toxic.

Colorado River Basin – Midland’s Beal Park Pond and C.J. Kelly Pond were sampled on November 26. While C.J. Kelly had low concentrations of golden alga and nontoxic water, the Beal Park sample contained moderate concentrations of golden alga and highly toxic water. Beal Park will not be stocked with rainbow trout on December 11 as originally planned, but stocking will take place at C.J. Kelly on that date. Comanche Trails Park in Odessa contained no golden alga cells and the water was not toxic.

September 17, 2012 - Red, Brazos and Colorado basins

Red River Basin – A water sample collected from Lake Diversion on September 17 contained moderate concentrations of P. parvum and the water was not found to be toxic.

Brazos River Basin – Possum Kingdom Reservoir was sampled at the dam on September 10. No P. parvum were detected and the water was not toxic.

Colorado River Basin – On September 17, the water at Colorado City State Park contained low cell concentrations and nontoxic water. Moss Creek was sampled at the boat ramp; the water contained moderate P. parvum concentrations and the water was slightly toxic.

June 12, 2012 - Red River Basin

Golden alga has been found in water samples collected from the Red River between Wichita Falls and Gainesville. The Highway 89 sample contained moderately toxic water, while no toxicity was found in the sample from Ketchum’s Bluff.

April 13, 2012 - Brazos River Basin

Samples collected from Lake Whitney on Monday, April 2 all contained moderate cell concentrations of P. parvum. Toxicity was high at McCowan Valley and low at Lofer’s Bend. The water from Steele Creek was nontoxic.

Lakes Granbury and Possum Kingdom were sampled on Tuesday, April 10. The Lake Granbury samples (US 377, FM 51 and the dam) contained low cell counts and nontoxic water. On Possum Kingdom, the Deep Elm Arm site had moderate cell concentrations and low toxicity, while Sandy beach has low concentrations and low toxicity. The Johnson Road sample contained low cell concentrations and nontoxic water.

March 13, 2012 - Brazos River Basin

Buffalo Springs Lake – Samples collected Wednesday, March 7 show low cell concentrations throughout the lake. The sample collected mid-lake also contained highly toxic water.

Clear Fork – Samples collected on Tuesday, February 28 found no P. parvum cells or toxic water at Rodgers Ranch or the Eliasville dam. However, the Hwy 578 location contained high concentrations of golden alga and highly toxic water.

Possum Kingdom – Four sites were sampled on Monday, March 12. Cell counts were low at the dam and Sandy Beach, and moderate at Johnson Road and the Deep Elm Arm. None of the samples contained toxic water. A second sample was collected from the dam on March 14 and it also contained low cell concentrations and nontoxic water.

Mineral Wells area – Moderate cell counts and highly toxic water was found March 5-6 at the Tin Top boat ramp, Devils Hollow Road, FM 4 and Highway 180. The I-20 sampling location had moderate cell counts but moderately toxic water.

Lake Granbury - Samples collected on Tuesday, March 13 show no P. parvum at the dam or FM 51 and low concentrations at U.S. Hwy 377. The water was nontoxic at all locations.

Lower Brazos River – The TPWD Coastal Fisheries study of P. parvum along the lower Brazos found no cells detected at U.S. Hwy 59, Brazos Bend State Park or Brazoria County Road 849.

March 12, 2012 - Red and Colorado River basins

Lake Diversion, Red River Basincontained moderate concentrations of P. parvum cells but the water was highly toxic.

Brady Creek Reservoir, Colorado River Basin Samples were collected from Brady Creek. Water was nontoxic at the boat ramp despite moderate concentrations of golden alga. The dam also had moderate concentrations of golden alga and the water was moderately toxic.

March 8, 2012 - Brazos River Basin

On March 5, biologists from TPWD and the Brazos River Authority investigated the golden alga fish kill along the river between Possum Kingdom Lake and Lake Granbury. They traveled approximately 32 miles, from Tin Top Road to just upstream of I-20. Dead fish (mostly nongame) were observed in the lower 18 miles of that stretch. On March 6, TPWD investigated the upper end of the river from I-20 upstream to FM 4, finding dead and dying fish at FM 4 and Hwy 180. The kill appeared to be most severe/active near FM 4. Fish at various states of decay were observed at all locations upstream of Hwy 281, except at Hwy 16. Water samples collected at various locations along the river confirm a toxic golden alga bloom as the cause of the kill. Moderate cell concentrations were found at the Tin Top Road boat ramp, I-20, US Hwy 180, Devil’s Hollow Road, and FM 4; all locations except I-20 had highly toxic water. The bloom appears to be spotty with 2 epicenters; one near FM 4 and the other at the Tin Top Road area. The stretch of the river from Hwy 281 to just upstream of the Dennis Bridge did not appear to have any dead or dying fish.

March 2, 2012 – Brazos River Basin

TPWD game wardens are investigating a probable golden alga-related fish kill at Horseshoe Bend. Sand bass, sunfish and freshwater drum have been found dead, along with stressed carp and gar. There are no dead fish at Tintop Road at the present time.

Lake Whitney: A toxic golden alga bloom is causing a fish kill. So far, threadfin shad, gizzard shad, freshwater drum, sunfish, bass, striped bass, and other nongame fish are affected. The vast majority of fish are nongame. An investigation was conducted on Wednesday and Thursday and estimated fish kill numbers are pending. The kill is most active around the McCowan Valley/Juniper Cove area but the bloom appears to be moving down-lake, as many dead threadfin shad were noted floating in open water between McCowan Valley and the dam. Water samples contained moderate golden alga concentrations at Soldier’s Bluff and Steele Creek and high concentrations at McCowan Valley.

February 29, 2012 – Rio Grande Basin

El Paso’s Lake Ascarate was sampled on February 29; the water was nontoxic and P. parvum cell counts were low with a mixed algal community.

February 17, 2012 – Brazos River Basin

Lake Whitney: TPWD received word today of dead and dying shad at Juniper Cove Marina. Game wardens are responding to the report; another update will be posted as new information is received.

Week of February 13, 2012 – Red, Brazos, Colorado and Rio Grande basins

Plum Lake, Red River Basin: Water samples collected this week contained high levels of golden alga and highly toxic water.

Possum Kingdom Reservoir, Brazos River Basin – Golden alga concentrations were moderate with varying toxicity. Moderately toxic water was found at the cliffs and the dam, while toxicity was low at Sandy Beach.

Brady Creek, Colorado River Basin – Golden alga is the cause of a fish kill at Brady Creek. Moderate cell concentrations and moderate toxicity were found at the dam and boat ramp. This is a new location to be affected by golden alga.

Lake Ascarate, Rio Grande Basin – Golden alga was found in another new location this week when it was confirmed as the cause of a small fish kill in El Paso’s Lake Ascarate. Water samples revealed moderate cell counts and moderate toxicity in the lake.

February 9, 2012 – Brazos and Rio Grande Basins

Brazos River Basin (Possum Kingdom, Lake Granbury, Lake Whitney, lower Brazos River): Cell counts are rising along the upper portions of the Brazos River. Water collected on February 1 from Possum Kingdom at Johnson Road, Sandy Beach, the Deep Elm Arm and the dam all contained moderate to high concentrations of golden alga. Sandy Beach was the only location to have nontoxic water.

Water was collected from Lake Granbury on February 2. The U.S. Highway 377 and FM 51 locations both contained nontoxic water and no golden alga. The sample collected from the dam contained moderate golden alga concentrations but the water was nontoxic. No additional fish kills have been reported from the lake.

Lake Whitney was sampled on February 2. The McCowan Valley site contained moderate concentrations of golden alga and moderately toxic water, Steele Creek had high cell concentrations and highly toxic water, while Soldier’s Bluff had low cell concentrations and nontoxic water. No fish kills have been reported from Lake Whitney.

The lower Brazos River was sampled on February 6. No cells were found at Highway 59, Brazos Bend State Park, or County Road 849 and all water was nontoxic.

Rio Grande Basin: Water collected from Salt Creek at Pipeline Road contained no golden alga and the water was nontoxic.

January 6, 2012
Red River Basin: On Tuesday, biologists collected water samples from Plum Lake and Lake Wichita, finding toxic water moderate concentrations of P. parvum.

Brazos River Basin:
Possum Kingdom Reservoir: Four samples were collected on Wednesday. Low concentration and nontoxic water were found at Johnson Road and at the dam; while P. parvum was dominant in the samples from Sandy Beach (slightly toxic water) and the Deep Elm Arm (moderately toxic water).

Lake Granbury: High concentrations of P. parvum and highly toxic water were found at FM 51 on Thursday. The US 377 site had moderately toxic water and moderate concentrations of P. parvum, while the dam had moderate concentrations of the algae but the was water was only slightly toxic.

Lake Whitney: No P. parvum was found at Lofers Bend on Wednesday and though low concentrations were found at McCowan Valley and Steele Creek, the water at both locations was not toxic.

January 3, 2012
Brazos River Basin: The Brazos River Authority is collecting water samples from Lake Granbury this week to follow up on recent fish kills suspected to be golden alga-related. The fish kills have occurred at Mallard Point, the City Boat Ramp, City Beach and Hwy 377; shad have been the dominant species.

Samples collected last week from the lower Brazos River at Hwy 59, Brazos Bend State Park and County Road 849 all contained no golden alga.

November 18, 2011 - Brazos River Basin

Lake Granbury: Samples collected yesterday by the Brazos River Authority yielded no cells at the dam and low concentrations at FM 51 and US Hwy 377. Toxicity in the water was low.

Lake Possum Kingdom: Low concentrations of P. parvum and low toxicitywere found at the dam, Johnson Road, and Sandy Beach; the Deep Elm Arm of the lake also had low concentrations of P. parvum but the water was not toxic.

Lake Whitney: No P. parvum was found at McCowan Valley, Steele Creek or Lofers Bend and the water was not toxic.

May 11, 2011 - Colorado River Basin

A number of sites along the Colorado River were visited this week. No golden alga was found at Lake Nasworthy or Twin Buttes Reservoir. O.H. Ivie Reservoir had no golden alga in samples collected from the main lake or the Concho River arm, while the Colorado River arm sample contained low concentrations of golden alga and nontoxic water. Low cell concentrations and slightly toxic water were found at the Moss Creek boat ramp. Lake Colorado City at the State Park and E.V. Spence at Wildcat Creek both contained moderate concentrations of golden alga and highly toxic water.

May 6, 2011 – Red, Colorado, Brazos and Rio Grande Basins

Rio Grande Basin - Water samples collected from the Pecos River at Brotherton Ranch and Coyanosa contained no golden alga cells.

Colorado River Basin – Beal Park Pond in Midland was monitored on Thursday; moderate levels of golden alga and highly toxic water were found.

Red River Basin – A sample collected from Lake Diversion at Dundee State Fish Hatchery contained low levels of golden alga and slightly toxic water.

Brazos River Basin – A large portion of the Brazos River was monitored for golden alga this week. Moderate cell concentrations were found all along Lake Granbury; water at the US 377 site was not toxic, while highly toxic water was found at FM 51 and the dam. The Squaw Creek sample contained moderate levels of golden alga and nontoxic water. On Possum Kingdom Reservoir, moderate cell concentrations and highly toxic water were found in samples from the Deep Elm and Sandy Beach. The sample from Johnson Road contained low levels of golden alga and slightly toxic water, while at the dam the water contained low levels of golden alga and the water was nontoxic to slightly toxic. Lake Whitney at Steele Creek had moderate cell concentrations and slightly toxic water; low cell counts and nontoxic water were found at McCowan Valley and Lofers Bend.

April 14, 2011 – Colorado and Rio Grande Basins

Rio Grande Basin - Water samples containing nontoxic water and no golden alga were collected from the Pecos River at Coyanosa and at Brotherton Ranch.

Colorado River Basin – O.H. Ivie, Colorado City, Moss Creek, E.V. Spence, Nasworthy and Twin Buttes

A number of sites along the Colorado River were sampled this week as well. On O.H. Ivie Reservoir, no cells were found in either the main lake or in the Concho River arm. Low concentrations of cells were found in the Colorado River arm but the water was not toxic. Samples collected from Lakes Nasworthy and Twin Buttes both contained no golden alga. However, toxic water and moderate levels of golden alga was found at the Moss Creek boat ramp and Colorado City State Park, while the sample from E.V. Spence at Wildcat Creek contained high levels of golden alga and toxic water.

April 8, 2011

Red River Basin

Water samples collected Tuesday from Lake Diversion by the Dundee State Fish Hatchery contained moderate concentrations of golden alga and highly toxic water.

Brazos River Basin

On Tuesday, water samples were collected from Possum Kingdom Reservoir. The sample from the dam contained low numbers of golden alga cells and the water was not toxic. The Johnson Road site also contained low numbers of cells but the water was slightly toxic. Sandy Beach and the Deep Elm Arm both contained moderate levels of golden alga and moderately toxic water.

A bit of good news for Lake Granbury: the Brazos River Authority visited the lake this week and found little to no fresh dead fish on the lake. Water samples confirm that the lake is still toxic, and high concentrations of golden alga were found in samples collected from the dam, US 377 and FM 51.

The good news continues for Lake Whitney, where Wednesday’s water samples showed no golden alga or toxic water at McCowan Valley or Steele Creek and low cell concentrations with nontoxic water at Lofers Bend.

March 31, 2011 - Lake Granbury, Brazos River Basin

TPWD and BRA continue their assessment of the ongoing golden alga fish kill occurring on Lake Granbury. The event appears to be on the decline and on Thursday, March 31, fresh dead and dying fish were only found at the dam. Hundreds of dead smallmouth buffalo were seen near Decordova Dam Park and a few dead fish were counted from the mid-lake area (the Mansion) to the dam. No fresh dead fish were observed north of the Mansion. Water samples will be collected next week for cell concentrations and toxicity tests.

March 26, 2011 - Colorado River Basin

On Saturday, March 26, a fish kill comprised of goldfish (including koi), black bullheads and gulf killifish occurred at Wadley-Barron Park Pond in Midland. TCEQ collected a water sample and confirmed the presence of golden alga.

March 23, 2011 - Red River Basin

On Friday March 18, TPWD responded to a report of a fish kill on the Wichita River near Byers. A water sample confirmed moderate to high concentrations of golden alga. A small number of dead fish including freshwater drum, river carpsucker and blue catfish were found at the Hwy 171 bridge in Byers. No dead fish were found at the 810 Bridge.

On Monday, March 21 dead gar and buffalo were reported to extend from upstream of the Hwy 171 Bridge in Byers all the way to the mouth of the Red River. TPWD will conduct a fish kill investigation and collect additional water samples tomorrow.

March 1, 2011 – Brazos River Basin

TPWD and BRA continued their weekly fish kill assessment of Lake Granbury on Monday. An active fish kill continues to affect the lake, including channel and flathead catfish, largemouth bass, white bass, white crappie, and striped bass. Dead fish were found from Hunter Park down to the dam; most were long-dead fish, though fresh dead fish were found below the downtown area. Results from the water sample analysis are pending.

February 21-22, 2011 – Brazos and Colorado River Basins

Brazos River Basin

On Tuesday TPWD and Brazos River Authority biologists visited Lake Granbury for a fish kill assessment, finding dead fish from Hunter Park to the dam. The active kill appeared to be from about the Rough Creek area to the dam. Thousands of shad were reported dead Tuesday night near the dam. Samples will be taken next week for toxicity and cell counts.

Colorado River Basin

Water samples were collected from a number of waterbodies within the Colorado River basin on Monday. No golden alga was found at Lake Nasworthy, Twin Buttes reservoir, or O.H. Ivie Reservoir, where samples were taken from the main lake as well as the Colorado and Concho river arms. E.V. Spence, Lake Colorado City and Moss Creek all contained high concentrations of golden alga and highly toxic water. Golden alga was the dominant alga in those samples.

February 16, 2011

Lake Granbury, Brazos River Basin

On Monday, February 14, TPWD and BRA visited Lake Granbury to assess the ongoing golden alga fish kill event. A very small number of long-dead fish (4-5 days) were found near Hunter Park, the FM 51 bridge, The Peninsula, and City Beach. The kill continues to move downstream; actively dying and dead fish were found from City Beach to Port Ridglea East. Although a few game fish (white bass, largemouth, white crappie) continue to be affected, the vast majority of affected fish are still non-game species. Overall, less fish were seen this week than last.

On Tuesday, TPWD received a fish kill report from someone who lives in a cove along Lake Granbury just east of the FM 51 bridge. The caller reported seeing a number of small fish (possibly shad) and a few larger fish dead and dying in his cove. It is possible that the “active kill” may stretch as far north as the FM 51 bridge and that the biologists just did not see any dying fish in those areas on Monday.

February 7, 2011

Brazos River Basin

TPWD and Brazos River Authority biologists conducted a fish kill investigation of Lake Granbury on Monday, February 7. Dead fish were found from the Peninsula to S. Ports o Call, with fresh dead and dying fish stretching from the City Boat Ramp south to S. Ports o Call. Fewer fish were found as they moved further down the lake from the Peninsula. Threadfin shad, gizzard shad, freshwater drum, and white crappie dominate the fish kill. Water from the dam at Lake Granbury had low concentrations of golden alga but the water was not toxic. Highly toxic water and high concentrations of golden alga were found at the FM 51 and US Hwy 377 sites.

Water samples were collected this week from Lakes Possum Kingdom and Whitney. No dead or dying fish are being found at either lake. On Lake Whitney, samples collected from McCowan Valley, Steele Creek and Lofers Bend did not contain any golden alga cells. At Possum Kingdom, low cell concentrations were found in the water sample collected at the dam, and the samples from Johnson Road, Sandy Beach and the Deep Elm Arm all had no golden alga cells.

Red River Basin

A water sample collected from Plum Lake in Wichita Falls contained high concentrations of golden alga and moderately toxic water.

January 31, 2011 – Brazos River Basin

TPWD Kills and Spills Team biologist Melissa Dudley and Brazos River Authority biologist Alan Greer conducted a fish kill investigation on Lake Granbury on Monday, January 31. They found dead fish beginning around The Peninsula subdivision continuing downstream to Rough Creek, though concentrations were highest in the area of the City Boat Ramp in downtown Granbury. The fish kill mainly consists of threadfin and gizzard shad, freshwater drum, and sunfish, with small numbers of catfish, largemouth bass and white bass being found as well.

January 27, 2011 – Red and Brazos River Basins

Red River Basin
Moderate cell concentrations and toxic water are being found this week in isolated areas of Lake Texoma’s Red River arm.

Brazos River Basin
On Tuesday, January 18 TPWD and BRA conducted a fish kill investigation on Lake Granbury. Since the previous investigation on January 7, the area of the kill has increased but fewer dead fish have been found. At the beginning of the event, only threadfin shad were affected, but by the 18th additional species were being found, including small sunfish, gizzard shad, freshwater drum, inland silversides, and one white crappie.

On Sunday, January 23, TPWD received a report of dead bass near the Highway 51 bridge (Hunter Park). Brazos River Authority rangers visited the location on Monday and found dead fish on the shoreline at Hunter Park and the City Boat Ramp, but no dead fish in open water.

TPWD and BRA conducted a followup fish kill investigation on Tuesday, January 25, noting dead fish (1-2 days old) from Hunter Park to just south of the City Boat Ramp. Most of the fish were freshwater drum, sunfish, and threadfin shad; only two largemouth bass and one white crappie were seen. Dying fish were seen near the shoreline in the Bentwater subdivision.

January 12, 2011 – Canadian, Red, Brazos and Colorado Basins

Canadian River Basin

A water sample collected on Monday from Lake Meredith contained moderate concentrations of golden alga and highly toxic water.

Red River Basin

Plum Lake was monitored on Monday. Samples were collected at both the north and south sides of the lake and were found to have highly toxic water and high concentrations of golden alga.

Brazos River Basin

Lake Granbury is experiencing an ongoing golden alga fish kill. Dead threadfin shad were reported from Hunter Park on Friday, January 7. Biologists followed up this week and confirmed thousands of dead shad and moderate cell concentrations.

Colorado River Basin

No golden alga or toxic water was found in samples collected from Comanche Trail Park pond in Odessa or C.J. Kelly and Beal Park ponds in Midland. Algal community populations were low in all samples.

January 10, 2011 – Red, Canadian, San Jacinto and Brazos River Basins

Red River Basin

Golden alga is currently being found at low concentrations in both the Lebanon Pool area and the Red River arm of Lake Texoma.

Highly toxic water has been found in Lake Diversion at the intake for the Dundee State Fish Hatchery. Water collected from Plum Lake in Wichita Falls contained high concentrations of golden alga and highly toxic water.

Canadian River Basin

TPWD staff have been monitoring Lake Meredith in the wake of the recent golden alga bloom and are finding very few fresh dead fish. Most of the fish being found along the shores are from the previous fish kill, mostly gizzard shad but also white bass, catfish and walleye. The highest concentrations of dead fish are just below the tower on the dam. A water sample was collected today and toxicity results are still pending.

San Jacinto River Basin

The golden alga bloom continues in the Santa Ana Bayou estuary, which has a tidal connection to the Houston Ship Channel. Though dead fish were recently seen in the reflecting pool at San Jacinto State Park, no fish kill has been observed within the estuary. A water sample was collected today and toxicity results are pending; however, two samples taken at different locations within the estuary were both found to contain golden alga.

Brazos River Basin

TPWD received a report over the weekend of a fish kill in the Brazos River near Rosenberg. Golden alga is the suspected cause, but we are still awaiting confirmation.

Water samples were collected from several reservoirs along the Brazos River last week. Lake Granbury had moderate concentrations of golden alga in a mixed algal community. The sample collected at the dam had no toxicity and those collected at FM 51 and Highway 377 had slightly toxic water. At Possum Kingdom, no cells were found at the dam or at Johnson Road, and nontoxic water with low to moderate concentrations of golden alga was found at Sandy Beach and in the Deep Elm arm of the reservoir. Water samples collected from Lake Whitney at McCowan Valley, Steele Creek and Lofers Bend all contained low concentrations of the alga and no toxicity.

January 3, 2011 – Canadian River Basin

The fish kill that was occurring late last month on Lake Meredith has ceased for now. The kill was comprised of mostly shad, and very few game fish were found, including small numbers of crappie, walleye, white bass and channel catfish. Golden alga was the dominant algal species in the water samples collected from the kill.

December 22, 2010 - Golden Alga Update

San Jacinto River Basin

TPWD Kills and Spills biologist Winston Denton was contacted by San Jacinto State Park staff concerning recurring fish kills in the reflecting pool near the San Jacinto monument. Denton collected water samples and sent them to the lab at TPWD’s A.E. Wood fish hatchery for analysis. The water was found to be moderately toxic and contain very high concentrations of golden alga. Because of the close proximity to Santa Ana Bayou, the park was advised not to pump or move any water to avoid spreading the bloom.

December 10th, 2010 – Colorado and Rio Grande River Basin

Colorado River Basin – Colorado City, Moss Creek, E.V. Spence, Nasworthy, Twin Buttes, Beal Park, C.J. Kelley, Comanche Trail Park, and O.H. Ivie

Golden alga cell count densities and toxicity levels are very high in Colorado City State Park, Moss Creek near the boat ramp, and E.V. Spence Reservoir at Wildcat Creek. The three locations, which were sampled on December 6th all had golden alga as the dominant algal species.

Golden alga was at low concentrations with no toxicity in samples collected from Nasworthy, Twin Buttes, Comanche Trail Park, and C.J. Kelly in the second week of December. Beal Park also had low concentrations of golden alga cells; however, a slight level of toxicity was present. All five water bodies sampled had a mixed algal community or low algal densities.

O.H. Ivie Reservoir was sampled for golden alga in the second week of December in three locations; the main lake, Colorado arm and Concho arm. Cell count densities were low in the main lake where no toxicity was detected. Golden alga was present in the samples from the Colorado arm but not in quantities large enough to make a density reading, and no golden alga cells were reported to be in the Concho arm. There was no toxicity detected in ether arm and all three locations had a mixed algal community.

Rio Grande River Basin – Pecos River (Coyanosa)

Water collected from the Pecos River at Coyanosa had low to moderate density levels of golden alga cells and a slight toxicity was detected.

December 8th, 2010 – Brazos, and Red River Basin

Red River Basin – Diversion

In the first week of December golden alga cell count densities were moderate to high on Lake Diversion. Golden alga toxicity levels for the lake were also at very high levels; however there have not been any resulting fish kills reported.

Brazos River Basin – Possum Kingdom, Whitney, Granbury

Possum Kingdom Reservoir was sampled in the first week of December from several locations. Most locations had a mixed algal community or very low algal densities. Golden alga cells and toxicity levels were not detected.

Lake Whitney had golden alga cell count densities in the low to moderate range in three locations that were sampled (McCowan Valley, Steele Creek, and Lofers Bend). In spite of the elevated cell counts, no toxicity was recorded and all samples contained a mixed algal community.

Lake Granbury was sampled in three locations in the first week of December. Although there were no cells reported to be in water samples taken from the dam, water samples taken from FM 51 and US 377 had low densities of golden alga cells present. All three locations did not have any levels of toxicity and a mixed algal community.

November 16th, 2010 – Colorado and Brazos River Basin

Colorado River Basin – Kills and Spills Team biologists are investigating a fish kill on E.V. Spence Reservoir that was reported to have started in mid October. Water samples collected from E.V. Spence on November 8th showed golden alga cell counts to be at a high density and the toxicity levels were also high. The recent fish kill on E.V. Spence reported last week was wide spread and dead fish were observed at Southside Park near the dam, Wildcat Cove on the south side and Lake View Park on the north side. Approximately 2500 fish are estimated to be dead and the majority of the kill was comprised of common carp.

Moss Creek and Colorado City State Park also have high densities of golden alga cells and very toxic water. However no fish kills have been reported as of yet from these water bodies.

Water samples taken from Beal Park, C.J. Kelly Park, and Nasworthy are all showing golden alga cell count densities to be moderate and toxicity levels low. Samples collected from the Twin Buttes Reservoir show no toxicity and no level of golden alga cells was present.

O.H. Ivie Reservoir was sampled for golden alga levels in three locations in the second week of November. Samples from the Colorado River Arm and the Concho River arm were clear of golden alga with no levels of toxicity and no golden alga cells present. Water samples taken from the main lake however, showed low densities of golden alga cells and no toxicity.

Brazos River Basin – Possum Kingdom was sampled for golden alga in the second week of November in the Deep Elm arm and at the Dam. Both locations had low densities of golden alga cells present and no toxicity.

Water samples were collected from Lake Granbury at the Dam and FM51. Both locations had low to moderate densities of golden alga cells and no toxicity. Likewise, Lake Whitney was sampled at McCowan Valley and Lofers Bend. Again, low to moderate densities of golden alga cells were present and no toxicity was reported.

October 13, 2010 – Colorado and Rio Grande River Basins

Colorado River Basin (Nasworthy, Twin Buttes, E.V. Spence, Moss Creek, O.H. Ivie) – Water samples collected from Nasworthy and Twin Buttes Reservoirs in early October had low to zero cell count densities and no toxicity was measured for ether water body. A similar situation was seen in water samples collected on O.H. Ivie in the first week of October. Samples were collected from three locations in the O.H. Ivie Reservoir: Main Lake, Colorado River arm and Concho River arm. Zero to low cell count levels were observed at all three locations and no toxicity was recorded.

Golden alga cell count densities were approaching moderate to high levels in some of the usual Colorado River Basin hot spots. Colorado City State Park had cell densities reaching high numbers with a moderate level of toxicity being reported as of October 4th. Water collected from the boat ramp at Moss Creek had moderate levels of golden alga cells; however the toxicity was very high. No recent fish kills have been reported in these water bodies.

On October the 4th water collected from Wildcat Creek on E.V. Spence had moderate to high density levels of golden alga cells and a moderate level of toxicity. A fish kill has recently been reported on the lake. Although golden alga is suspected to be the cause this has not yet been confirmed.

Rio Grande River Basin (Pecos) – Golden alga continues to remain quiet on the Pecos River. No cells were detected and no toxicity was reported from water sample collected at Coyanosa in the first week of October.

September 16, 2010 – Red and Colorado River Basin

Red River Basin – On September 7th water was sampled from Lake Diversion through the Dundee State Fish Hatchery. Golden alga cell density in the samples was below detectable limits and no toxicity was reported.

Colorado River Basin – In the week of September 13th water samples were collected from several bodies of water within the Colorado River Basin. All samples collected had a mixed algal community present.

Golden alga was suspected at Twin Buttes Reservoir and in the Colorado River arm of O.H. Ivie although cell densities were below detectable limits and no toxicity was recorded. However, the main lake body of O.H. Ivie did have a low density of golden alga cells even though no toxicity was recorded.

Water samples collected from Wildcat Creek on E.V. Spence, C.J. Kelly Park pond in Midland, and Comanche Trail Park pond in Odessa all had golden alga cell densities below the detectable limit and no toxicity reported.

Golden alga cell density was low but present in water collected from Colorado City at the state park and Moss Creek near the boat ramp. Although no toxicity was reported for the samples from Colorado Creek, the samples from Moss Creek were at a moderate level of toxicity.

August 13th 2010 – Colorado, Brazos, Red, and Rio Grande River Basins

Colorado River Basin – Water was collected from several locations in O.H. Ivie. Although golden alga was suspected of being present in the Colorado River arm of the lake, no cell count densities were reported and no toxicity was detected. The same holds true for the Main lake and Concho River Arm. Both river arms supported a mixed algal community while the Main lake had a low overall algal density.

Golden alga cell count density levels were moderate to high in water samples collected at Colorado City’s State Park site on August 9th. However no toxicity was detected and there was a mixed algal community present.

Moss Creek and E.V. Spence water samples, also collected on August 9th, had no golden alga cells present and no toxicity was detected. Samples were also collected from Nasworthy and Twin Buttes Reservoirs on August 9th. Nasworthy did have a low level of golden algae cells present while Twin Buttes did not and nether reservoir had a detectable level of toxicity. All four of these water bodies had a mixed algal community.

Brazos River Basin – Water samples were collected from Possum Kingdom Reservoir on the10th of August. The samples, which were collected from the Dam area, had no golden alga present and only a slight level of toxicity. There was a mixed algal community.

Rio Grande River Basin – On August 10th water was collected from the Pecos River at Coyanosa. No golden alga cells were detected and no toxicity was reported. Water was also collected from Salt Creek, a tributary off of the Pecos on August 3rd. No golden alga cells were detected in those samples and no toxicity was reported.

Red River Basin – Water taken from Diversion Reservoir on August 10th had no golden alga cells present and no level of toxicity was reported.

July 9, 2010 – Colorado, Rio Grande, Red, and Brazos River Basins

Colorado River Basin – Water samples collected from Colorado City State Park on July 5th had low density levels of golden alga cells and a moderate level of toxicity. On that day samples were also collected from Moss Creek at the Boat ramp and from E.V. Spence at Wildcat Creek. The samples from both locations had no golden alga cells present and no toxicity detected. All three locations had a mixed algal community present.

Water samples were also collected from Twin Buttes and Nasworthy reservoirs on July 5th. There was a mixed algal community, no golden alga cells present and no toxicity detected for both reservoirs.

On July 6th water samples were taken from three locations on O.H. Ivie reservoir at the Colorado River arm, Main lake, and Concho River arm. All three locations had no toxicity and no golden alga cells detected. The Colorado and Concho River arms both had a mixed algal community while the main lake had an overall low algal density.

Rio Grande River Basin – Water samples were collected from the Pecos River at the Brotherton Ranch location on July 6th. No golden alga cells were detected and no toxicity was reported.

Red River Basin – Water samples collected from Lake Diversion on July 6th (location 76360) reported no density for golden alga cells; however a slight toxicity was detected.

Brazos River Basin – Water samples collected from the dam at Possum Kingdom reservoir on July 6th showed no toxicity and no density of golden alga cells present. A mixed algal community was detected.

June 10, 2010 – Rio Grande, Colorado, Red, and Brazos River Basins

Rio Grande River Basin – Water samples were collected from the Pecos River at Coyanosa on the 7th of June and from Brotherton Ranch on the 8th of June. Both locations reported no toxicity. Samples taken from the Brotherton Ranch location had no golden alga cells present; however samples from the Coyanosa location had a low density of golden alga cells.

Colorado River Basin – Water samples collected on June 7th from Colorado City State Park and Moss Creek at the boat ramp had moderate to high densities of golden alga cells, high toxicity and golden alga was dominant in the algal community.

Samples were collected on June 7th from E.V. Spence at Wildcat Creek, Nasworthy and Twin Buttes. All samples had a mixed algal community and no toxicity. Water samples from Nasworthy and Twin Buttes had no golden alga cells present however there was a low density of golden alga cells present at E.V. Spence.

On June 8th water samples were taken from three locations on O.H. Ivie at Colorado River arm, the Main Lake, and the Concho River arm. Samples had a low or mixed algal community, no toxicity and no golden algal cells present.

Red River Basin – Water samples were collected on June 7th from Lake Diversion through the Dundee State Fish Hatchery. No golden alga cells were present and no toxicity was detected.

Brazos River Basin – Water samples collected from the dam on Possum Kingdom on June 7th had a mixed algal community, no toxicity and a low density of golden alga cells present.

June 4, 2010 Brazos River Basin

Lake Whitney Water samples were collected from three locations on Lake Whitney the first day of June. Cell counts taken at Lovers Bend (1054) were in the moderate to high range however only slight amounts of toxicity were recorded. Water collected from Plowman Park (1240), McCowan Valley, and Walling Bend all had low cell count densities and low toxicity readings. No cells counts and no toxicity levels were reported for water samples taken at Steele Creek (1322). All samples contained a mixed algal community.

Possum Kingdom Water samples were taken on the first of June from four locations in Possum Kingdom Reservoir. All samples contained a mixed algal community, no toxicity and no cell count densities were reported.

Lake Granbury On the second of June water samples were collected from three locations in Lake Granbury. Water collected at US 377 (20307) had a low to moderate density of golden alga cells and a moderate level of toxicity. Water samples collected at the Dam (11860) also had moderate levels of toxicity and a moderate density of golden alga cells. Samples collected from FM51 (11862) had a moderate to high density level of golden alga cells and no toxicity. All samples contained a mixed algal community.

May 12th 2010 – Colorado River Basin

Water samples were collected on May 10th from Colorado City State Park, Moss Creek at the boat ramp, and at E.V. Spence around Wildcat Creek. All locations had high densities of golden alga cells, high toxicity, and P. parvum was the dominant algal species.

On May 10th water samples were also collected from Nasworthy and Twin Buttes Reservoirs. No golden alga cells were detected in those samples, no toxicity was noted and there was a low over all algal density.

Water samples were collected on May 11th from O.H. Ivie Reservoir at the Colorado River arm, Main Lake and Concho River arm. No golden alga cells were detected in those samples and no toxicity was reported. All locations had a low algal density or mixed algal community.

May 6, 2010 – Brazos, Red, and Rio Grande River Basins

Brazos River

Possum Kingdom Reservoir – Water samples taken by the Possum Kingdom Reservoir Dam on May 3rd were densely populated with golden alga cells and P. parvum was the dominant species present. However the toxicity readings taken around the dam were only at a moderate level. Water samples were also taken at Sandy Beach (11867), Deep Elm arm (11868) and Johnson Road (11866). Golden alga cell counts and toxicity were low at the Sandy Beach location. Deep Elm arm had no golden alga cells present and no toxicity, and Johnson Rd. had a moderate level of golden alga cells also with no toxicity. All three locations had a mixed algal community.

Granbury – Samples were collected from Lake Granbury on May 4th. Water collected at US 377 (20307) and at the Dam (11860) had high density levels of golden alga cells and a moderate level of toxicity. Water samples that were collected at FM 51 (11862) also contained high levels of golden alga cells and toxicity was also high. P. parvum was the dominant algal species in all samples.

Whitney – On May 4th water samples were collected from Lake Whitney from five locations. Samples collected at Walling Bend had a moderate density of golden alga cells and low toxicity and Lofers Bend (1054) had low levels of golden alga cells present and no toxicity. Golden alga cell density at Steele Creek (1322) was at a moderate level while cell counts at Plowman Park (1240) were still high; however both locations had a moderate level of toxicity. Although golden alga cell density was low at McCowan Valley toxicity readings were still very high. All five locations sampled had a mixed algal community present.

Red River Basin

Diversion – Water samples collected from Lake Diversion on May 3rd had low levels of golden alga cells present and a moderate level of toxicity. There was a mixed algal community present.

Rio Grande River Basin

On May 3rd water was collected from the Pecos River at Coyanosa and from Salt Creek at the Dam Road to Red Bluff. A low density of golden alga cells was present in the samples from Coyanosa, however no toxicity was detected. No golden alga cells were detected in the samples taken from Salt Creek and toxicity was not reported. Water was later collected on May 5th from the Pecos River at Brotherton Ranch with no golden alga cells or toxicity detected. All locations had low algal densities.

April 29, 2010 – Brazos River Basin (Possum Kingdom Reservoir and Lake Whitney)

Possum Kingdom Reservoir – It looks like the golden alga bloom in Possum Kingdom Reservoir is starting to subside in some locations. Water samples were collected from four locations on April 27th. Samples collected at Rock Creek Camp had no golden alga cells and no toxicity and a mixed algal community. Samples collected at North D+D (GPW 072) had low golden alga cell densities, no toxicity and a mixed algal community. Golden alga cell densities were still high at the Cliffs Boat Ramp (GPS 148) and at Scenic Point (GPS 080) with toxicity levels at both sites in the moderate range and P. parvum being the dominant algal species.

Lake Whitney – Golden alga activity also appears to be tapering off in areas of Lake Whitney. Samples were collected in four locations on April 26th. Water samples collected at McCowan Valley had low densities of golden alga cells, no toxicity and a mixed algal community. Although samples collected from Morgan’s Lakeside still had high densities of golden alga cells, no toxicity was detected and there was a mixed algal community present. Water samples taken from Lofers Bend (1054) had moderate densities of golden alga cells and a low level of toxicity with a mixed algal community present. Samples collected from Juniper Cove (1136) also had moderate densities of golden algal cells and a mixed algal community; however toxicity was at a moderate level for that area.

April 26, 2010 – Brazos River Basin (Lake Granbury)

Water samples were collected from three locations on Lake Granbury last Monday, April 19, 2010. Samples collected at Hunter Park had low to moderate levels of golden alga cells, no toxicity, and a mixed algal community. However, samples collected from Stumpy and Pecan Plantation Marinas were approaching high densities of golden alga cells and were at a moderate level of toxicity. Both Marinas also had a mixed algal community present.

At this time very few fish mortalities have been reported on Lake Granbury. TPWD biologists and staff will continue to monitor Lake Granbury, as well as Lake Whitney and Possum Kingdom Reservoir. Updates on the golden alga status of these lakes will be posted as soon as they are available.

April 20, 2010 – Brazos River Basin (Lake Whitney and Possum Kingdom Reservoir)

Inland Fisheries Division staff continues to monitor golden alga fish kills on Possum Kingdom Reservoir and Lake Whitney. As of last Friday (April 16th), an estimated 50,900 fish have been killed at Possum Kingdom and about 68,900 fish are estimated dead at Lake Whitney. Species such as gizzard shad, threadfin shad, freshwater drum, catfish, white bass, striped bass and largemouth bass have been impacted.

During an investigation on April 12th, dead and dying fishes were concentrated on the mid to lower-lake on Possum Kingdom. On April 9th, dead fish were observed on Lake Whitney from the south side of the Katy Bridge to the dam; concentrations of dead fish were found on the Lake Whitney State Park shoreline, Solders Bluff, Lofers Bend, and Little Rocky Creek.

April 13, 2010 – Brazos River Basin (Lake Whitney and Possum Kingdom – Fish Kills)

Possum Kingdom Reservoir – The fish kill on Possum Kingdom Reservoir continues with dead and dying fish observed at Neely Slough, South D&D boat ramp, and Scenic Point. Dead gizzard shad numbered into the thousands, while largemouth bass, stripers, smallmouth buffalo, carp, bluegill, freshwater drum, channel catfish and white bass were also counted.

Water samples taken in various locations throughout Possum Kingdom Reservoir have shown some decline in golden alga cell density between March to April. However densities in all locations were still high and toxicity was high in those locations tested.

Lake Whitney – The fish kill on Lake Whitney is persisting as well, with several dead fish observed in the State Park, Cedron Creek Park and north of Little Rocky Creek. Dead fish were also noted in Rocky Creek, Little Rocky Creek, Soldiers Bluff, and Lofers Bend. Several dead stripers as well as fresh water drum, gizzard shad, threadfin shad, white crappie, warmouth, bluegill, white bass, smallmouth buffalo, and logperch were observed.

TCEQ team members reported seeing dead fish on the northern end of the lake from Steele Creek Park to White Bluff. Water samples recently taken at Little Rocky Creek, Lofers Bend, Soldiers Bluff, Steele Creek (by TCEQ), Profiler, Steele Creek Boat Ramp and Lakeside Marina were all in the moderate to high range for golden alga cell density levels.

April 8, 2010 – Colorado, Rio Grande, and Brazos River Basins

Colorado River Basin – Water samples were collected from three locations in O.H. Ivie Reservoir (Colorado River arm, Main Lake, and Concho River arm) in early April. No golden alga cell counts could be made in all three samples and there were no toxicity levels detected. All samples had low overall algal densities or a mixed algal community.

Samples collected at Twin Buttes Reservoir and Lake Nasworthy also had no golden alga cell densities, no toxicity and low overall algal densities.

Rio Grande River Basin – Water samples taken at Coyanosa in early April were approaching moderate density levels of golden alga cells and a moderate level of toxicity was detected. Samples collected at Brotherton Ranch however had no density levels of golden alga cells and no toxicity was reported.

Brazos River Basin – Golden alga cell count levels were still high in four locations sampled on Lake Whitney (FM 51, Plowman Park, Juniper Cove, and Lofers Bend). Lake Whitney samples taken from Steele Creek had cell count densities approaching moderate levels. All samples taken from Lake Whitney had moderate toxicity levels and all except two locations (Juniper Cove and Lofers Bend) had a mixed algal community, with the two exceptions having P. parvum as the dominant algal species.

April 7, 2010 – Colorado and Brazos River Basins

Colorado River Basin – Water samples were collected from Colorado City State Park, Moss Creek at the boat ramp, and E.V. Spence at Wildcat Creek in the first week of April. All samples had very high densities of golden alga cells, high toxicity, and P. parvum was the dominant algal species. There have not been any related fish kills reported in these water bodies.

Brazos River Basin – Water samples and reports from local citizens confirm that the golden alga bloom on Possum Kingdom Reservoir is back. Samples were collected from Johnson Rd., FM 2951, Deep Elm arm and the dam in the first week of April. All samples had high densities of golden alga cells, very high levels of toxicity and P. parvum was the dominant algal species. At this time regional biologists are investigating the bloom and further reports are pending the conclusion of that investigation.

March 31, 2010 – Brazos River Basin (Possum Kingdom and Lake Whitney)

As of late last week no new dead fish had been reported on Possum Kingdom Reservoir as a result of a previous golden alga bloom. Biologists from the area report that conditions are returning to normal.

No new dead fish were observed on Lake Whitney as of Friday, March 26th. Some dead fish were observed in Cedron Creek and a few fish were found in White Bluff earlier in the week of March 22nd. Cell count densities taken in a few places around the lake are still very high; however no toxicity levels have been reported.

March 24, 2010 – Brazos River Basin (Lake Whitney – Fish Kill)

Brazos River Basin (Lake Whitney) – Late last week golden alga was confirmed as the cause of a fish kill in Lake Whitney. The kill is spotty throughout the lake but has mostly occurred on the northeast end of the lake from the State Park to White Bluff. Kills and Spills biologists are estimating the number of dead fish to be in the thousands with the bulk of the species being shad and sun fish.

March 22, 2010 – Brazos River Basin (Possum Kingdom – Fish Kill)

Brazos River Basin (Possum Kingdom) – A golden alga bloom and associated fish kill were reported in Possum Kingdom Reservoir on the 18th of March. Ten different locations were sampled within the Reservoir and all locations had high densities of golden alga cell counts, most with high levels of toxicity and P. parvum was the dominant algae in all samples.

Texas Parks & Wildlife’s Kills and Spills biologists investigated all sample locations for dead or dying fish. At the time of the investigation only three of the ten sites had no dead or dying fish present. The biologists talked with a fishing guide who showed them some stripers that he had caught on Neely Slough that Thursday (the 18th). According to this information we can discern that on the 18th some fish were still able to find refuge from the toxic water.

March 10th 2010, Colorado, Red, Brazos River Basins

Colorado River Basin – Water samples were collected from Colorado City at the State Park, Moss Creek near the boat ramp and E.V Spence at Wildcat Creek in the second week of March. All samples contained high levels of golden alga cells and very high toxicity was recorded. P. parvum dominated all samples from the three water bodies.

Water was collected at Nasworthy and Twin Buttes Reservoirs. No golden alga cells were seen and no toxicity was recorded. Both locations had a mixed algal community present.

Water samples were taken from three locations at O.H. Ivie Reservoir. Although P. parvum was suspected at the Colorado River arm location no cells were reported and no toxicity was present. The samples collected at the Main Lake and at the Concho River arm also had no cells in the samples and no toxicity. In all locations a mixed alga, or low density algal community was present.

Red River Basin – Water samples collected from Lake Diversion near the hatchery had low to moderate level of cell counts and no toxicity was recorded.

Brazos River Basin – Water samples collected from Possum Kingdom Reservoir near the dam had low to moderate levels of golden alga cells and no toxicity was reported. There was a mixed algal community present.

March 8th 2010, Rio Grand and Brazos River Basin

Rio Grande River Basin – Water samples taken from the Pecos River at Coyanosa in the first week of March were not toxic and contained very low levels of golden alga cells.

Water samples collected at Balmorhea were moderate to high in the number of golden alga cells present and toxicity was high. P. parvum was the dominant alga present.

Brazos River Basin – Water samples taken from Lake Granbury at the dam were not toxic and had a mixed alga community present even thought golden alga cell counts were very high. However, water collected from Granbury at FM 51 had no golden alga cells, no toxicity and a low alga density.

Water was collected from Possum Kingdom Reservoir from 4 locations. Samples taken from Deep Elm arm, and FM 2951 had very high levels of golden alga cells, high levels of toxicity and P. parvum was the dominant alga. Samples take from Jason Rd. also had high numbers of golden alga cells, however toxicity was low and a mixed alga community was present. Samples collected at the dam were approaching moderate numbers of golden alga cells and no toxicity was recorded.

Water samples were collected from four locations on Lake Whitney. Samples taken at Plowman Park had moderate numbers of golden alga cells present, while samples taken from McCowan Valley, Steele Creek, and Walling Bend were approaching moderate levels of golden alga cells. No toxicity was recorded for any of the four sites and all samples had a mixed algal community present.

February 11th 2010 – Colorado, Brazos, Rio Grande, and Red River Basins

Colorado River Basin – Water samples collected from Colorado City, E.V. Spence, and Moss Creek in the second week of February were all reported to be very toxic with high densities of golden alga cells present. All samples were dominated by the presence of P. parvum.

Water samples collected from three locations on O.H. Ivie Reservoir had low to no cell density levels for golden alga and no toxicity was recorded. All samples had a mixed algal community. Similar results were obtained from water samples collected at Nasworthy and Twin Buttes Reservoirs.

Water samples were also collected at a water treatment plant in Big Spring and tested for golden alga. Water collected and labeled “raw” had a high level of toxicity and a very dense golden alga cell count. However, water collected that was labeled “finished” had no golden alga cells present and no bioassay was conducted to determine toxicity due to the level of Chlorine that was detected.

Brazos River Basin – Samples collected from Lake Whitney had a low to moderate density of golden alga cells and no toxicity was recorded. A mixed alga community was present.

Red River Basin – Water samples collected from Diversion Reservoir had a low to moderate density of golden alga cells and a slight toxicity was recorded.

Rio Grande River Basin – Water samples collected from the Brotherton Ranch location on the Pecos River had no golden alga cells present and no toxicity was reported.

January 22nd, 2010 – Brazos River Basin (Possum Kingdom and Lake Whitney)

Earlier this week water samples were collected from several sites around Possum Kingdom Reservoir. Golden Alga cell densities were low in most locations with the exception of the Rock Creek Camp location which had high golden alga cell densities.

On Wednesday the 20th the BRA collected samples near Rock Creek Camp in response to a fish kill. The golden alga cell densities were very high in these samples; however golden alga has not yet been confirmed as the cause of the kill as toxicity levels are still unknown.

Water samples were collected from several locations on Lake Whitney this week. Samples collected at Plowman Park had low density levels of golden alga cells while all other samples had no golden alga cells present.

January 13th, 2010 – Rio Grande, and Colorado River Basins

Rio Grande River Basin – Water samples were collected at Coyanosa and Brotherton Ranch along the Pecos River in the first week of January. Cell count levels were low at Coyanosa and no toxicity was reported. No cells were counted in the Brotherton sample and no toxicity was reported.

Colorado River Basin – Golden alga cell counts were at a moderate to high level and high toxicity was reported for water samples collected from Colorado City Lake. Water samples collected at the boat ramp of Moss Creek also had high toxicity and golden alga cell counts were in high density. Samples colleted at E.V. Spence had high golden alga cell count densities and high toxicity as well. In all three locations golden alga dominated the algal population.

Water samples collected form Lake Nasworthy, and Twin Buttes had no golden alga cells present and no toxicity was reported. Nasworthy had a very low algal density and Twin Buttes had a mixed algal community.

Water samples were collected from three locations in O.H. Ivie Reservoir at Main Lake, Colorado River Arm, and Concho River Arm. All samples had no golden alga cells present and no toxicity. Algal communities were either low in density or mixed.

January 5th 2010 – Brazos River Basin

Brazos River Basin – Water samples collected in several places around Lake Granbury on January 4th showed golden alga cell count levels ranging in the low to moderate level. No toxicity was reported and no fish kills have been recently reported for Lake Granbury.

December 18, 2009 – Colorado, Red, and Brazos River Basins

Colorado River Basin – Water samples taken from Colorado City Lake contained golden alga cell count levels in the moderate to high range and very high toxicity levels were recorded with P. parvum being the dominant algae species present. Likewise, samples taken from the boat ramp at Moss Creek also contained moderate to high levels of golden alga cells with high toxicity and P. parvum was the dominate species in the samples. In spite of these high levels of toxicity no associated fish kill events have been reported.

Water samples taken from Wildcat Creek on E.V. Spence Reservoir had golden alga cell count densities approaching moderate levels, a lower recorded toxicity than the other tow water bodies and a mixed algal community present. Warden Jimmy Allen reported a small fish kill on E.V. Spence and Mountain Creek Reservoirs near Robert Lee on December 17th. The kill consisted of approximately 200 gizzard shad, freshwater drum, and common carp.

In samples taken from C.J. Kelly pond no golden alga cells were found and there was no toxicity recorded.

Red River Basin – Water samples collected from Lake Diversion had golden alga cell densities approaching moderate, however no toxicity was detected.

December 11, 2009 – Brazos, Rio Grande, and Colorado River Basin

Brazos River Basin – Water samples were taken from several places in Lake Granbury in early December. Cell count levers fluctuated from low to moderate levels throughout the lake. Toxicity was not reported, however no fish kills have been recorded.

Rio Grande River Basin – Water samples were taken along the Pecos River at the Brotherton and Coyanosa location. Cell counts levels at Coyanosa were low and no toxicity was recorded. Samples from Brotherton had no golden alga cell density levels and no toxicity was recorded.

Colorado River Basin – Water samples were taken at Comanche Trails Park Pond in Odessa. Golden alga cell density was in low concentrations, no toxicity was recorded and there was a low algal density reported.

November 16th 2009– Colorado River Basin

Colorado River Basin – Water samples collected at Colorado City Lake in the third week of November had golden alga cell counts nearing moderate levels with a moderate level of toxicity and a mixed algal population reported.

Samples collected for Moss Creek at the boat ramp had golden alga cell count levels in the low to moderate range and moderate toxicity levels. A mixed algal population was reported.

Low to moderate cell count levels were also reported for E.V. Spence where water samples were collected at Wildcat Creek. A low level of toxicity was recorded and there was a mixed algal population present.

November 5, 2009

Rio Grande River Basin – Water samples collected from the Pecos River at Coyanosa had golden alga cell counts approaching moderate levels with a lightly elevated level of toxicity. Further down the river at Brotherton, water samples had very low cell counts of golden algae and no toxicity was reported.

Red River Basin – The number of golden alga cells per milliliter were near moderate levels in samples taken from Lake Diversion in the first week of November. Toxicity for Lake Diversion was also at a moderate level. So far there have been no associated fish kills reported.

Brazos River Basin – No golden alga cells were identified in water samples collected from Possum Kingdom reservoir in the first week of November and no toxicity was reported. There was a low overall algal density reported for this reservoir.

October 14, 2009 – Colorado, Rio Grande, Red, and Brazos River Basins

Colorado River Basin – Water samples collected from Colorado City Lake and Moss Creek had golden alga cell count levels approaching moderate numbers. While toxicity levels were only moderately elevated in Moss Creek, Colorado City Lake had very high levels of toxicity. Samples from E.V. Spence Reservoir showed golden alga cell counts in the moderate to high range although toxicity levels were only slightly elevated. All three of theses water bodies had mixed algal communities. Water samples from Beal Park Pond, however, were dominated by golden alga cells and the cell count was very high. Toxicity levels for Beal Park Pond were also very high. So far, there has not been a reported fish kill associated with these high levels.

Rio Grande River Basin – Water samples collected at Coyanosa and Brotherton showed had no detectable golden alga cells and no levels of toxicity.

Red River Basin – Water samples collected from Lake Diversion had low to moderate numbers of golden alga cells and a slightly elevated level of toxicity. Overall there was a low algal density in the samples.

Brazos River Basin – Water samples taken from Possum Kingdom Reservoir had low levels of golden algal cells and no toxicity. There was an overall low algal density in these samples.

September 9, 2009 - Statewide

Over the past few months there have been no fish kills associated with golden alga blooms. Although golden algae cell counts and toxicity levels are regularly monitored around the state, there have been no significant reports of these levels from any of the major water bodies. Cell counts and toxicity levels will continue to be monitored and all information, including golden alga related fish kills will be reported when they occur.

September 11th 2009 – Rio Grande, Colorado, Red, and Brazos River Basins

Rio Grande – Water samples taken at the Brotherton Ranch location of the Pecos River showed there were no golden alga cells present and no toxicity was measured. A low algal density was recorded.

Colorado – Water samples taken from Beal Park pond in Midland had very high golden alga cell count levels and high toxicity with golden alga being the dominant algal species. No fish kills have yet been associated with this bloom. C.J. Kelly and Comanche Trail Park pond, also in Midland had no golden alga cells present and no toxicity levels.

Red River – Lake Diversion water samples showed a low level of golden alga cells present and low toxicity levels.

Brazos – Water samples taken from Possum Kingdom had low to moderate levels of golden alga cells and no toxicity. There was an overall low algal density in the samples.

July 9th, 2009 – Red River, Brazos River, and Rio Grande River Basins

Red River Basin – Water samples collected from Lake Diversion had low levels of golden alga cells and no toxicity was detected.

Brazos River Basin – Possum Kingdom reservoir had no golden alga cells detected in recent water samples and no toxicity. There was a low overall algal density in this reservoir near the dam where samples were drawn.

Rio Grande River Basin – The Pecos River was sampled at Coyanosa and golden alga cell counts were in the low to moderate range; however there was no toxicity detected. Water samples were also taken from Brotherton on the Pecos River and no cell counts or toxicity was detected. Both locations had a low overall algal density.

June 19th, 2009 – Colorado River, Red River, and Brazos River Basins

Colorado River Basin – Comanche Trail pond and creek were sampled, however no golden alga cells were detected and no toxicity was recorded. A mixed algal population was noted in the creek, while a low overall algal density was recorded for the pond.

Red River Basin – Lake Diversion was sampled for golden alga in mid June. Cell counts were low to moderate and toxicity was at a moderate level with a low overall algal density. Water samples that were collected from Tanglewood Lake did not return any golden algae cells in the count and no toxicity was reported. A low overall algal density was recorded for the lake.

Brazos River Basin – Water samples were collected from Possum Kingdom in mid June and showed no count of golden algae cells and no toxicity. There was a low overall algal density in the samples.

June 3rd, 2009 – Red River Basin

Water samples were collected from two locations on Baylor Lake in the last week of May. Both samples had low golden alga cell densities, no toxicity, and ether had a low overall algal density or a mixed algal population. Water samples collected from Childress Lake in the last week of May also had low golden alga cell counts, no toxicity, and a mixed or low overall algal density.

May 24th, 2009 – Brazos River Basin (Lake Granbury)

On May 24, 2009, a fish kill was reported on Lake Granbury. Johnson County Game Warden Scott Kirkpatrick and Brazos River Authority (BRA) Ranger Alan Grier made an estimated count of approximately 200 dead gizzard shad. It was suggested that the fish kill was due to a golden algae bloom and samples taken from Lake Granbury days before the fish kill exhibited moderate toxicity levels.

May 7th – Red River, Rio Grande River, Brazos, and Colorado River Basins

Red River Basin – Water samples were collected from Lake Diversion and showed no cell counts with only a slight level of toxicity.

Rio Grande River Basin – Water samples were collected along the Pecos River at Brotherton Ranch and Coyanosa. No golden alga cells were detected at the Brotherton Ranch location; there was no toxicity, and low overall algal densities. At Coyanosa, however, golden algae cell numbers were approaching a moderate level and there was a moderate level of toxicity in a mixed algal community.

Brazos River Basin – Possum Kingdom Reservoir water samples showed no golden alga cells and there was a slight level of toxicity. The samples showed a low overall algal density.

Colorado River Basin – Water samples were collected from Colorado City State Park and showed cell count levels approaching high numbers and a high level of toxicity. Cell count levels were also approaching high numbers for water samples collected from Moss Creek, although toxicity levels were moderate. In both locations golden algae was the dominant algae species. Water samples taken from E.V. Spence Reservoir showed moderate levels of golden algae cells and moderate levels of toxicity with a mixed algal community present.

April 16th, 2009 – Red River, Brazos, Rio Grande, and Colorado River Basins

Red River Basin – Water from Diversion Reservoir was sampled in the first week of April and returned a low cell count number with a moderate level of toxicity. Water was sampled from Baylor Lake and no golden alga cells were detected and no toxicity was reported. Water sampled from Childress Lake was also found to be not toxic, however the cell count for golden alga was high and P. parvum was the dominant alga species.

Brazos River Basin – Water sampled from Possum Kingdom Reservoir in the first week of April had a low number of golden alga cells and no toxicity was reported.

Rio Grande River Basin – The Pecos River was sampled at Brotherton in the first week of April and there was no golden alga cells detected and no toxicity in the water.

Colorado River Basin – In mid April Colorado City Reservoir and Moss Creek were sampled. Cell counts at both locations were at a moderate to high level and toxicity for both locations was also at a moderate level. Cell counts from water samples taken at E.V. Spence Reservoir were high and toxicity was moderate. P. parvum was the dominant algal species at Moss Creek and E.V. Spence, whereas Colorado City showed a mixed algal population.

March 16, 2009 - Colorado River Basin

Three lakes along the Colorado River were sampled this week for golden alga concentration: Lake Colorado City at the State Park, Moss Creek at the boat ramp, and E.V. Spence at Paint Creek. All three samples contained moderate levels of golden alga and highly toxic water.

February 23rd – Colorado River, Red River, Brazos, and Nueces-Rio Grande Coastal Basins

Colorado River Basin – Water collected from C.J. Kelly Park pond was examined on the 23rd of February and was found to contain a low density of golden alga cells and an overall low alga density with no toxicity. An examination of water samples collected from Beal Park pond and Comanche Trails Park pond detected no golden alga cells and no toxicity. Beal Park pond had a low overall alga density and Comanche Trails Park pond had a mixed algal population.

Water samples examined on the 23rd of February that were collected from Colorado City state park, E.V. Spence at Paint Creek, Moss Creek at the boat ramp, and a CRMWD reservoir all had high concentrations of golden alga cells and golden alga was the dominant algal species. Toxicity at these sites was very high and some associated fish kills have been reported.

Nueces-Rio Grande Coastal Basin – Efforts to locate the source of the golden alga cells which bloomed in a pond in the Baffin Bay watershed are on-going. Local TPWD biologists will continue to work with the city of Kingsville on this matter. There are still no occurrences of golden algae cells noted anywhere else in the Nueces-Rio Grande Coastal Basin.

Red River Basin – Golden alga cell counts are still being monitored in water samples from Lake Wichita, however reports of fish kills in the area are starting to decrease.

Brazos River Basin – Reports of fish kills on Possum Kingdom Reservoir have declined but golden alga cell counts continue to be closely monitored. Cell counts are also being monitored in Lake Granbury even though no recent fish kill reports have been made.

Intermittent golden alga related fish kills continue to be reported on the lower Brazos River in Fort Bend and Austin Counties.

February 18th – Colorado River, Red River, and Nueces-Rio Grande Coastal Basins

Colorado River Basin – A fish kill was reported in the Colorado River upstream of O.H. Ivie by a land owner. The origins of the fish kill might have been near Robert Lee. A local TPWD biologist reported seeing more then 4500 dead fish in an 11 mile stretch of the river between these two locations. Water sampled from this area showed high concentrations of golden alga cells. The river will be monitored to see if the bloom will reach downstream to O.H. Ivie Reservoir.

Nueces-Rio Grande Coastal Basin – The source of the golden alga bloom that occurred in a pond in the Baffin Bay watershed is still under investigation. Local TPWD biologists are working with the city of Kingsville and the owner of the land on which the effected pond is located to trace the source of this pond’s inoculation. So far no occurrences of golden algae cells have been noted anywhere else in the Nueces-Rio Grande Coastal Basin and appear to be confined to the one pond.

Red River Basin – There are still reports of dead fish as a result of the golden alga bloom on Lake Wichita. The last report showed the total count of dead fish at this lake to be over 200 thousand and included species that had not been seen in previous counts. Golden alga cell density was last checked for this lake in the first week of February and showed levels to be high in many places but approaching moderate levels at some of the sample sites.

February 4, 2009 – Red, Brazos, and Rio Grand River Basins

Red River Basin – Water samples taken from Lake Wichita on the February 3 showed that golden alga cell counts are still high in many locations. Cell counts are however, approaching moderate levels at some of the sample sites. It is estimated that over 130 thousand fish have been lost so far due to this bloom and more fish are being reported.

Lake Diversion was also sampled on the February 3and had moderate to high cell counts in most places with a persisting high level of toxicity.

Brazos River Basin – Samples from Possum Kingdom Reservoir are showing golden alga cell counts approaching moderate to low levels. However, there are still some reports of dead fish on the lake.

Rio Grande River Basin – Water collected along the Pecos River at Brotherton Ranch and Coyanosa on the February 3 had very low toxicity and no cells were detected in the samples.

January 30, 2009 - Baffin Bay Watershed, Kleberg County - Nueces-Rio Grande Coastal and Red River Basins

A new location has been confirmed as the site of a golden alga bloom and related fish kill. On January 30, TPWD biologists Paul Silva and Alex Nunez conducted a fish kill investigation in a Kingsville storm water drainage basin which empties into an unnamed pond and ultimately, during periods of high flow, into Tranquitas Creek. The creek did not appear to be impacted during this event. Yellow water and carp with bloody opercula led the biologists to suspect golden alga; their suspicions were confirmed Monday, February 2. Water samples were collected at four sites within the impacted area. The two uppermost sites contained very high concentrations of golden alga cells; golden alga was the dominant plankton in each of those samples. Though the third site saw the largest concentration of dead carp, no cells were found in water samples from either the third or fourth sites. Birds were noted around the area of the pond.

Lake Wichita, Red River Basin - On Friday, January 30 a TPWD game warden reported a fish kill on Lake Wichita. Gizzard shad and a larger than normal number of seagulls were initially seen, but a follow-up visit to the lake the next day found the lake covered with seagulls, pelicans and cormorants feeding on dead gizzard shad and bluegill. A third visit on Sunday revealed more dead shad, drum, bluegill and crappie. Water samples contained very high concentrations of golden alga.

January 26, 2009 - Colorado River Basin

Water samples were collected Monday, January 26 from three sites along the Colorado River. Lake Colorado City State Park, Lake E.V. Spence at Wildcat Creek, and the boat ramp at Moss Creek all contained moderate concentrations of golden alga cells and highly toxic water. Golden alga was the dominant organism in all three samples.

January 23, 2009 - Brazos River Basins

Lower Brazos River - The lower Brazos River below I-10 has seen another recent fish kill due to golden alga. On Friday, January 23 the Brazos River Authority observed a fish kill comprised of mostly carp and catfish where the river crosses U.S. Highway 90A at Richmond.

January 26, 2009 – Brazos River Basin

Lake Granbury - Samples collected from three sites along Lake Granbury were all found to contain toxic water. Minor fish kills have been reported and the lake will continue to be monitored.

January 21-22, 2009 - Brazos River Basin

Possum Kingdom Reservoir – Possum Kingdom was sampled Wednesday, January 21 at 14 separate sites. Scenic Point and South D&D contained no golden alga cells. The dam, Hell’s Gate, South Broadway, the state park, Sandy Beach, North D&D, Sam’s, Ranger Slough, Peanut Patch, Willow Beach, the airport and Rock Creek Camp all contained low concentrations of golden alga cells. Yellow-green water was seen from Sandy Beach to Rock Creek and a group of birds were observed in the area of the airport. Rock Creek Camp was experiencing a fish kill comprised of small threadfin shad. Biologists report that the kill is progressing down the reservoir. It remains concentrated north of Costello Island in the north arm, but discolored water and “patchy” blooms are evident as far south as the state park and Sandy Beach near Broadway. Small shad continue to die, but birds are eating them very quickly.

Lake Granbury – Lake Granbury was visited on Thursday, January 22; yellow-green water was found at sites throughout the lake. There was a previous report of a small shad kill near Mallard Point, but no dead/dying fish or concentrations of birds were found during the sampling. Low concentrations of cells were found at Highway 51 (Hunter Park), Ranger Slough, the public ramp near Highway 377, the Shores at Panama Street, Rough Creek Camp and the dam at Ranger Boathouse.

Lower Brazos River – On Thursday, January 22 biologists responded to a reported fish kill along the lower Brazos in the Houston area. Stressed and dying fish ranging from small minnows to larger buffalo were seen below I-10 near Sugarland. Golden alga has been confirmed as the cause of this kill.

January 20, 2009 - Colorado River Basin

On January 20 Beal Park and C.J. Kelly ponds in Midland were sampled for golden alga. No golden alga or toxic water was found in either sample.

January 12, 2009 – Red and Brazos River Basins

Lake Diversion, Red River Basin - Water was collected and analyzed on Monday, January 12. Low concentrations of golden alga were found but the water was not toxic.

Possum Kingdom Reservoir, Brazos River Basin – A water sample collected January 12 contained very low algal densities overall and no golden alga or toxic water.

January 20, 2009 – Brazos River Basin

Biologists are following up on a reported shad kill occurring at Possum Kingdom Reservoir near the airport. More information will be posted as it becomes available.

January 8, 2009 – Colorado and Rio Grande Basins

Colorado River Basin – Water was collected on Thursday, January 8 from Comanche Trail Lake in Big Spring and Monahans Perch Pond. Golden alga was not found in either sample.

Rio Grande Basin – The Pecos River at Brotherton Ranch was sampled Thursday, January 8. Low numbers of golden alga were found but the water was not toxic.

January 5, 2009 - Brazos River Basin

On Monday, January 5 TPWD received word from a fishing guide on Lake Granbury of a possible golden alga bloom at Mallard Point. The guide reported one bass with hemorrhaging around the cheeks, foam on the bank of the lake, birds feeding and yellow water. The water sample contained moderate levels of golden alga. Biologists will continue to monitor the area.

January 5th, 2009 – Colorado and Rio Grande River Basins

Colorado River Basin - Water samples that were collected from the Comanche Trail Park pond in the first week of January contained no golden alga cells and were not toxic. This is a vast improvement from water samples that were tested in mid December. The testing followed the stocking and subsequent death of several rainbow trout and reveled a high concentration of golden alga cells which were thought to be the cause of the fish kill.

Rio Grande River Basin - Water samples taken from the Pecos River at Coyanosa had moderate levels of golden alga cells but no toxicity.

December 17th, 2008 – Colorado River Basins

Water samples were collected from several locations in the Colorado River Basin in mid December. Samples collected from Colorado City State Park had golden alga cell counts approaching a moderate level and a moderate level of toxicity with golden dominating the sample.

Water samples collected from Moss Creek had moderate cell count levels of golden alga and a moderate level of toxicity. The water showed a mixed alga population was present at that time.

Samples of water collected from E.V. Spence Lake at Paint Creek were approaching high cell count levels of golden algae and toxicity was moderate. Golden alga was the dominant alga species in these samples.

Water samples taken from C.J. Kelly had low cell count levels of golden alga and low toxicity levels. There was a mixed algal population at the time these samples were collected.

In water samples collected from Beal Park golden alga cell counts were at moderate levels, however toxicity was high. Golden algae dominated the present algal community.

December 1st, 2008 – Brazos, Red, and Rio Grande River Basins

Brazos River Basin - Water samples were collected Monday, December 1st from the Brazos River basin at Possum Kingdom Lake and showed low concentrations of golden alga cells, no toxicity and a low overall algal density.

Water samples collected from three sites on Lake Granbury, Brazos River Basin, had high concentrations of golden alga cells. Toxicity has not yet been assessed for these samples, and so far no fish kills have been reported in the area.

Red River Basin - Samples taken from Lake Diversion in the Red River Basin had no golden alga concentrations and no toxicity.

Rio Grande River Basin - Water samples were taken from two locations on the Pecos River in the Rio Grande Basin. Samples collected from Brotherton (lower reach) had no golden alga cell concentrations and no toxicity levels. Water sampled collected from Coyanosa (mid-reach) had low concentrations of golden alga cells and were slightly toxic.

November 3, 2008 – Red, Brazos, Colorado and Rio Grande basins

Red River Basin - Lake Diversion contained low numbers of golden alga in a dense, mixed overall algal population and the water was only slightly toxic.
Brazos River Basin - Lake Possum Kingdom contained low numbers of golden alga as well as low algal densities, though the water was moderately toxic.
Colorado River Basin - Moss Creek Lake and E. V. Spence Reservoir had moderate numbers of golden alga, moderately toxic water, and golden alga was the dominant phytoplankton in both lakes. At Lake Colorado City State Park, golden alga numbers and toxicity were both moderate but the algal population was mixed.
Rio Grande Basin - The Pecos River at Coyanosa was found to contain no golden alga cells or toxicity and low algal densities overall.

October 6th – Colorado River Basin

Water samples were collected from the Colorado River basin. E.V. Spence Lake at Paint Creek had low golden alga concentrations with low overall algal densities and no toxicity. Water sampled from the boat ramp at Moss Creek contained a mixed algal community with low golden alga concentrations and was slightly toxic. At the state park, Colorado City Lake also contained low numbers of cells with a mixed algal community and was moderately toxic.

September 26th - Rio Grande River Basin

Water samples were collected in the past week from the Pecos River at Coyanosa (mid-reach) and from Brotherton Ranch (lower reach). The samples contained low densities of golden alga cells and low toxin concentrations.

September 15, 2008 – Colorado River Basin

Water samples collected Monday, September 15 from Lakes Colorado City, E.V. Spence and Moss Creek all contained low numbers of golden alga cells and no toxicity.

Week of August 30, 2008 – Colorado River Basin

TCEQ investigated a fish kill in Odessa’s Comanche Trails Park Pond this week. Small fishes were observed gulping at the surface for air, causing low dissolved oxygen to be suspected as the problem. However, golden alga was ultimately determined to be the cause, as the water sample contained a significant concentration of golden alga cells.

8/1/2008 - Rio Grande and Brazos River Basins

Rio Grande River Basin: Water was collected from the Pecos River at Coyanosa on July 21 and was found to contain no golden alga cells and no toxic water.

Brazos River Basin: Lakes Diversion and Possum Kingdom were sampled twice this month. On July 8 Lake Diversion contained low numbers of cells but the water was moderately toxic. When sampled again on July 21 the water contained similar numbers of cells and a mixed algal population and was not as toxic. Possum Kingdom’s water samples contained low numbers of cells, a low algal density overall, and low toxicity on both sampling dates.

7/12/2008 – Rio Grand River Basin

Water samples were taken from the lower Pecos River near the Val Verde/Terrell County line and were examined for golden alga. Cell counts were at a very low density and water clarity was exceptionally good.

5/28/2008 - Rio Grand River Basin

Rio Grande Basin: A water sample taken May 28 at Lake Balmorhea contained low levels of golden alga and no toxicity. A mixed plankton population and low overall algal densities were noted.

5/20/2008 - Rio Grande River Basin

The Pecos River near Coyanosa had high levels of golden alga cells and high toxicity. The golden alga cell counts were much lower near Brotherton Ranch just below Independence Creek and toxicity was in the moderate range. No stressed or dieing fish were observed at either location.

5/19/2008 – Colorado, Red, and Brazos River Basins

Colorado River Basin: Moss Creek was sampled for golden alga near the boat ramp. Golden alga cell counts and toxicity levels were moderate and there was a mixed algal population present.
Brazos River Basin: Golden alga cell counts taken in Possum Kingdom Lake were low; however toxicity was at moderate levels. Samples showed low overall algal densities.
Red River Basin: In Diversion Lake samples taken for golden alga showed low cell counts and low levels of toxicity.

May 9, 2008, Rio Grande Basin

Golden alga remains in the Pecos River. Samples collected this week by TCEQ from 2 sites in Red Bluff Reservoir had a golden-brown tint to them. The sample from State Line Road contained moderate cell counts and toxin levels and high toxicity. The sample taken near the dam had moderate numbers of cells but high toxicity and toxin concentration. However, no stressed or dead fishes were observed.

May 5, 2008. Red and Colorado River Basins

Red River Basin: Water collected from Lake Diversion contained low cell counts and low toxicity.

Colorado River Basin: Water samples were collected from Lakes Colorado City, Moss Creek and E.V. Spence. Colorado City had moderate cell counts and moderate toxicity, while Moss Creek and E.V. Spence contained low cell counts and moderate toxicity. All samples had a mixed algal population.

April 24-May 5, 2008, Brazos River Basin

Possum Kingdom is the site of a golden alga-related fish kill involving mostly threadfin shad but also including a handful of crappie and small catfish and largemouth bass. First reported April 24 in the Peanut Patch area of the lake, the kill soon spread to Cedar Creek (in the area of the State Park), the Bluff Creek cove area, Scenic Point Cove, Chaney Point at North View and Hell’s Gate. This comprises most of the lake. Water samples taken Monday, May 5 contained two things that are not the norm during golden alga-related fish kills: relatively low numbers of golden alga and a diverse plankton population. However, the cells themselves were large, indicating a growing population that likely ran out of food sources and became toxic. It is speculated that the golden alga was originally upriver and was washed into the lake by recent rains, then pushed into the coves where it began causing problems.

April 21, 2008 – Red, Brazos and Rio Grande Basins

Red River Basin: Low levels of golden alga continue to be seen in lakes Kemp, Childress, Baylor and Diversion with no reported effects.

Brazos River Basin: Baylor University researchers visited three sites on Lake Whitney: the dam, the Katy Bridge and White Bluff. Samples taken at the dam and White Bluff contained no golden alga and the Katy Bridge samples contained less than 1%. All samples had healthy populations of green algae, bacteria, diatoms, cyanobacteria and rotifers.

Rio Grande Basin: The Pecos River near Coyanosa continues to experience elevated cell counts and toxicity, though no fish kills have been reported to date. Further south, downstream of Independence Creek, the river has had much less toxicity and lower cell counts throughout the season.

April 21, 2008 – Trinity River Basin

Lake Benbrook near Fort Worth recently experienced a fish kill and the USGS sent two water samples to TPWD for analysis, neither of which contained any golden alga cells. Bacteria dominated the samples.

April 17, 2008 – Canadian River Basin

Four samples were collected from the Lake Meredith Stilling Basin on April 17, all containing low cell counts of golden alga. The cells themselves looked very healthy, a possible indication that the bloom is not new and will continue. The other plankton species were small and consisted of bacteria, green algae, cyanobacteria and diatoms.

April 4, 2008 – Red and Brazos River Basins

Lakes Baylor, Childress and Texoma, Red River Basin: Baylor Lake and Childress Lake were visited on Sunday, March 30. The three samples collected from Baylor Lake all contained moderate levels of golden alga, but indications are that the bloom might be on its way out. The two samples from Childress Lake also contained moderate levels of golden alga, which dominated the plankton community.

The Texas side of Lake Texoma was sampled Monday, March 31. Seven of the eight sites visited contained no golden alga cells: Slickum Slough, Cedar Mills, Flowing Wells, Mill Creek, High Port Marina, Denison Dam and Preston Point. Cedar Bayou had very low cells counts and golden alga comprised only 1% of the population.

Lake Whitney, Brazos River Basin: The last visit for TPWD’s pre-bloom study of Lake Whitney is scheduled for next week. So far there have been no indications of any bloom in Lake Whitney.

March 17 - Red River, Brazos River and Rio Grande Basins

Red River: A water sample collected March 17 from Lake Diversion contained relatively low cell counts and moderate toxicity.

Brazos River: Golden alga caused the recent mortality of about 500 shad in Lubbock’s Mae Simmons Park pond. High cell counts were recorded and in each of the two samples golden alga comprised over 50% of the algal community. Indications are that the bloom will continue.

A water sample collected from Possum Kingdom Reservoir on March 17 contained low cell counts and no toxicity.

Rio Grande: The Pecos River at Coyanosa was visited on March 17. Moderate levels of golden alga (dominating the algal community) and high toxicity was found in the sample. Still no reports of dead fish.

March 3-7, 2008 – Red River, Brazos River, Colorado River and Rio Grande Basins

Red River Basin: Cell counts and toxicity were moderate to high Monday on Lake Diversion. Baylor Lake is experiencing a fish kill that is suspected to be caused by golden alga. Foaming, yellow water and dead shad and sunfish have been reported. Sampling will occur soon on Lake Texoma but no dead fish or other effects have been reported recently.

Brazos River Basin: Buffalo Springs Lake is experiencing a golden alga-related shad kill. Yellow water and feeding birds have accompanied the kill, which has been going on since mid-February. Lake Granbury was visited recently and no signs of golden alga were seen. No dead fish have been observed in the Lubbock City Lakes. Possum Kingdom Reservoir was sampled on Monday; cell counts were low and the water was not toxic. The sampling trip to Lake Whitney has been postponed until next week due to weather.

Colorado River Basin: E.V. Spence Reservoir has seen more dead fish due to golden alga.

Rio Grande Basin: Monday’s sample from Lake Balmorhea contained high numbers of cells and moderately toxic water. Golden alga was the dominant phytoplankton.

February 27, 2008 - Rio Grande Basin

A water sample collected from the Pecos River below I-10 contained low numbers of cells and high levels of toxin, though no associated fish kill has occurred thus far.

February 27, 2008 - Brazos River Basin

The Brazos River between Possum Kingdom Reservoir and Waco was monitored this week for golden alga but none was found.

February 21, 2008 - Rio Grande Basin

Water samples collected from the Pecos River near Coyanosa contained high cell counts and toxicity; however, the water was not discolored and no stressed or dying fishes were observed.

February 15, 2008 - Colorado and Brazos Basins

E.V. Spence Reservoir, Colorado Basin: Last week's fish kill ended relatively quickly and appears to have been an isolated event. No further problems have been reported.

Lake Whitney, Brazos Basin: Biologists from TPWD and Baylor University collected water samples this week and found no golden alga and diverse plankton populations. Locals report low lake levels (7-8 feet below normal) but good fishing.

February 11, 2008 - Red River Basin

Lake Texoma: Samples were collected from eight sites: Slickum Slough, Cedar Bayou, Cedar Mills, Flowing Wells, Mill Creek, High Port Marina, Denison Dam and Preston Point. All counts were very low to zero. On the Oklahoma side, golden alga counts have dropped on Lebanon Pool as well.

February 4, 2008 - Colorado River Basin

Lake E.V. Spence is experiencing the first golden alga-related fish kill of the season, involving mostly small gizzard shad as well as small white bass, striped bass, freshwater drum, and largemouth bass. Low cell counts and moderate toxicity were found at the sites. Large numbers of fish-eating birds (white pelicans, cormorants, vultures, and gulls) were feasting in the area.

Elsewhere in the Colorado basin, water samples from Lake Colorado City show golden alga to be present in moderate numbers and dominating the algal community. The water is highly toxic, though no fish kills have been reported at this time. The boat ramp at Moss Creek contains low levels of golden alga and the water is not toxic.

February 4, 2008 - Brazos River Basin

Water collected from the dam at Possum Kingdom contained only low levels of golden alga (and low algal density overall) and the water was slightly toxic.

February 4, 2008 - Red River Basin

Water was collected from Lake Diversion on Monday, February 4. Moderate levels of golden alga and moderate toxicity were seen.

January 24, 2008 - Brazos River Basin

Lake Granbury: Four sites on Lake Granbury were visited Thursday, January 24: Hunter Park, the public boat ramp near Hwy 377, the boat ramp at Rough Creek and the dam at Ranger Boathouse. No golden alga cells were found in any of the water samples.

January 21, 2008 - Rio Grande Basin

Pecos River: Samples collected from the middle and lower Pecos River contained only low concentrations of golden alga and there have been no signs of toxic water. No issues or concerns have been reported from Red Bluff Reservoir.

January 28, 2008 - Red River Basin

Lake Texoma: Golden alga levels have been high at Lebanon Pool and low at Briar Creek this week. Though congregations of birds were recently seen at Lebanon Pool there have been no toxic water or fish kills anywhere on the lake.

Wichita Falls area: Water samples were collected from four sites along the Wichita River, two sites in Plum Lake and two sites in Lake Wichita. All water was completely free of golden alga and had good plankton populations.

Lake Diversion: The boat ramp and dam at Lake Diversion were monitored for golden alga this week. Golden alga was present at low levels in both samples and comprised less than 5% of the overall plankton population.

Lake Kemp: Golden alga was present at the two sites sampled on Lake Kemp. Though it still does not dominate the algal community, golden alga percentages have risen since the previous sample date.

January 15, 2008 – Brazos River Basin

Joan Glass collected samples from Lakes Granbury and Whitney on Tuesday, January 15. Four sites on Lake Granbury were visited: Hunter Park, the public boat ramp near Hwy 377, the boat ramp at Rough Creek and the dam at Ranger Boathouse. All water collected was free of golden alga.

On Lake Whitney, samples were collected from Kimball Bend Park, Lakeside Morgan Park, Steele Creek Park, Walling Bend Park and Lofer's Bend Park. Again, there was no golden alga found in any of the samples.

January 14, 2008 – Red River Basin

Eight sites were visited on Lake Texoma. No golden alga was found at Cedar Mills, Flowing Wells, Mill Creek, High Port Marina, Denison Dam or Preston Point. Cedar Bayou and Slickum Slough each had very low numbers of golden alga. All the samples had good plankton populations.

January 9, 2008 - Red River Basin

Lakes Texoma and Diversion: Golden alga is now occurring along the north side of Lake Texoma. Moderate levels have been found at Lebanon Pool and low levels in Briar Creek. No toxic water or dead fish have been reported from any portion of Lake Texoma.

The water sample taken earlier from Lake Diversion has been found to be moderately toxic.

January 7-9, 2008 - Colorado River Basin

Beal Park Pond, C.J. Kelly Park Pond, Moss Creek, E.V. Spence Reservoir and Lake Colorado City State Park: A number of sites along the Colorado River were monitored for golden alga this week. In Midland, no golden alga was found at Beal Park pond and only low levels were seen at C.J. Kelly Park pond. The boat ramp at Moss Creek had no golden alga. Paint Creek at Lake E.V. Spence had low levels of golden alga and the water was slightly toxic. Lake Colorado City State Park, however, contained moderate golden alga levels and moderately toxic water.

January 7, 2008 - Brazos River Basin

Possum Kingdom Reservoir: Water collected from the dam showed golden alga to be present but not dominant and the water to be slightly toxic.

January 4, 2008 - Red River Basin

Plum Lake, Lakes Diversion and Kemp: Golden alga is showing up in the upper Red River. Plum Lake, a city park lake in Wichita Falls, has experienced a fish kill and moderate levels of golden alga. Lake Diversion has low to moderate levels of golden alga but no dead fish at this time. A water sample has been sent to the lab at TPWD’s A.E. Wood Fish Hatchery in San Marcos to check for toxicity. Dead shad have been found on Lake Kemp but golden alga has not been confirmed as the cause.

January 2, 2008 - Brazos River Basin

Possum Kingdom Reservoir: Water samples were collected from eleven sites along the lake; of these, ten were found to contain no golden alga. The sample from Rock Creek Camp showed golden alga to be present at low levels, and yellow water and foam were noted at the site. Foaming was also seen at the state park boat ramp. Overall, the water looks good throughout the lake and no fish kills have been reported.

December 13-20 - Brazos River Basin

Lake Whitney: Baylor University researchers collected water samples on Lake Whitney last week at sites ranging from below the Nolan River to the dam. All samples contained only low densities of P. parvum and no cells were found in the water taken from the dam. Locals report good fishing and no signs of discolored water. Plans are to collect samples from lakes Possum Kingdom and Whitney around the first of the year.

Lake Granbury: TPWD collected samples from Lake Granbury on December 19, where water temperatures are in the low 40s. Sites sampled were the DeCordova Bend Dam, Rough Creek, New City Ramp, Hunter Park, and Upper and Middle Rucker Creek. The Rucker Creek samples contained no golden alga cells, however, cell counts from the other sites have increased since the end of November. Overall the lake looks good and there have been no reports of feeding birds or dying fish. Very clear water was seen from upstream of Mallard Point to Rucker Creek.

December 18 - Red River Basin

Lake Texoma: Water samples were collected from 8 sites along Lake Texoma this week: Cedar Bayou, Slicum Slough, Flowing Wells, Cedar Mills, Mill Creek, Highpoint Marina, Preston Point and the dam ramp. Two sites, Cedar Mills and Flowing Wells, contained very low concentrations of P. parvum and none were found in the remaining samples.

December 13 - Rio Grande Basin

Pecos River: The Pecos River site near Coyanosa, where toxic water and moderate to high cell counts had been seen in October and November, only contained low numbers of cells when sampled last week.

December 5, 2007 – Colorado River Basin

Beal Park and C.J. Kelly Park Pond: Samples were collected on December 5 from the Midland area. Golden alga was present and dominant and the water was found to be toxic in the Beal Park sample. No associated fish kill has been observed. The water collected from C.J. Kelly Park Pond contained a low algal density overall and no golden alga cells were seen.

November 2007 - Red River Basin

Lake Baylor: Samples collected in November showed moderate levels of golden alga, though no toxic water or fish kills have been reported from the area.

November 26-27 - Red River Basin

Lake Texoma: On November 27 biologists collected samples from Slicum Slough, Cedar Bayou, Cedar Mills, Flowing Wells, Mill Creek, Highport Marina, the Dam Ramp and Preston Point. All water samples either had no golden alga cells or very low numbers of cells.

Lake Diversion: Biologists at the Dundee State Fish Hatchery (where Lake Diversion is the water source) report no golden alga cells in their ponds for the week of November 26. This is a definite improvement, since toxic water was found in Lake Diversion earlier in the month.

November 7-19 - Rio Grande Basin

Pecos River: Toxic water and golden alga were found in a water sample collected from the Pecos River near Coyanosa during the week of November 19. However, no stressed or dead fish have been reported.

Lake Balmorhea: A water sample collected on November 7 contained moderate numbers of cells but no toxicity.

November 5 – 28 - Brazos River Basin

Lake Granbury: Samples taken on November 28 show golden alga to be present in very low numbers. The lake generally looks good and there are no birds of feeding or reports of stressed or dying fish.

Lake Whitney: Samples were taken from boat ramps at Kimball Bend, Lakeside Morgan, Soldiers Bluff, Walling Bend and Steele Creek on November 16. Though a small amount of foam was seen on the lake, no cells were found in the water samples.

Possum Kingdom: Low numbers of cells and no toxicity were seen in samples collected at the dam on November 5.

November 5 - Colorado River Basin

Samples collected November 5 from Colorado City State Park and the boat ramp at Moss Creek both had moderate cell counts and low toxicity. Paint Creek at Lake E.V. Spence showed moderate numbers of cells but the water was not toxic.

October 27 – November 2, 2007 – Rio Grande Basin

Pecos River, Red Bluff Reservoir: Golden alga was present in a water sample collected from the Pecos River near Coyanosa this week. No dead or dying fish were observed. A small fish kill (approximately 200 gizzard shad) was reported in the Red Bluff Reservoir by staff with the Red Bluff Water Power Control District. The fish kill occurred over the weekend of October 27-28. Golden alga is suspected.

October 29, 2007 – Brazos River Basin

Lake Whitney: Water samples were collected at three locations on Lake Whitney on October 29 by Baylor scientists. Golden alga was present but not dominant in two samples (Dam, and Katy Bridge) Golden alga was not present in the water sample from White Bluff. No fish kills due to golden alga have been reported on the lake this fall.

October 22, 2007 – Red River Basin

Lake Texoma: Water samples were collected on October 22 at 8 locations on the Texas side of Lake Texoma. Golden alga was not present in any of the water samples (Slicum Slough, Cedar Bayou, Cedar Mills, Flowing Wells, Mill Creek, Highport Marina, Dam Ram, and Preston Point). No fish kills have been reported from Lake Texoma this fall.

October 20 – 26, 2007 – Rio Grande Basin

Pecos River: Low amounts of golden alga were present in a water sample collected from the Pecos River near Brotherton Ranch this week. No fish kills have been reported on the Texas portion of the Pecos River this fall.

October 16-18, 2007 – New Mexico

Pecos River: A biologist from the New Mexico Game and Fish Department reported two golden alga-related fish kills on the Pecos River downstream from Carlsbad this summer. He collected a water sample from the Pecos River above the state line near Red Bluff Reservoir this week. Golden alga was present in the water sample. Dead, dried fish (small gizzard shad) were present on the river bank at two places, but no dead or dying fish were observed in the river. No fish kills have been reported on the Texas side of the Pecos River this fall.

October 8, 2007 – Brazos River Basin

Possum Kingdom Reservoir: Water samples were collected on October 8 at 12 locations on Possum Kingdom Reservoir by Kills and Spills Team biologist Joan Glass. Golden alga was present but not dominant in three locations (Dam, State Park-Ramp, and Willow Beach). Golden alga was not present at in the other water samples (Hells Gate, Scenic Point, South D. & D., South Broadway, Sandy Beach, North D. & D., Sam’s, Ranger Slough, and Rock Creek Camp). No fish kills have been reported on Possum Kingdom Reservoir this fall.

October 2, 2007 – Brazos River Basin

Lake Granbury: Water samples were collected on October 2 at three locations on Lake Granbury. Golden alga was present but not dominant at the New City Ramp and at Hunter Park. Golden alga was not present at Rough Creek. No fish kills have been reported on Lake Granbury this fall.

October 1, 2007 – Colorado River Basin

Lake Colorado City, Moss Creek Lake, and E.V. Spence Reservoir: Water samples were collected at Lake Colorado City, Moss Creek Lake, and E.V. Spence Reservoir on October 1. Golden alga was present but not dominant in each sample (at the State Park for Lake Colorado City, at the Boat Ramp for Moss Creek Lake, and Paint Creek for E.V. Spence Reservoir). No fish kills have been reported at these waterbodies this fall.

September 28, 2007 – Brazos River Basin, Red River Basin

Lake Whitney: Water samples were collected at three locations on Lake Whitney in the Brazos River Basin this week by Baylor scientists. Golden alga was present but not dominant in all samples (Dam, Katy Bridge, and White Bluff). No fish kills due to golden alga have been reported on the lake this fall.

Lake Diversion: Golden alga was reported at the Dundee Hatchery from its water source, Lake Diversion, in the Red River Basin.

September 25, 2007 – Rio Grande Basin

Pecos River: Water samples were collected at three locations on the Pecos River this week. Golden alga was present in all samples (Brotherton Ranch, Sheffield, and between Rankin and Iraan); no dead or stressed fish have been observed or reported.

September 18, 2007 – Rio Grande Basin

Pecos River: Water samples were collected at two locations on the Pecos River this week. Golden alga was present but not dominant in the water sample from Coyanosa (downstream from Pecos). Golden alga was present and dominant in the water sample near Girvin (approximately 40 miles upstream from IH-10). No dead or stressed fish were observed at either site, and no fish kills have been reported from the area.

September 4, 2007 – Red River Basin

Lake Diversion: A routine water sample collected on Lake Diversion near the dam by Dundee State Fish Hatchery staff on September 4 did not have any detectable golden alga present.

August 25 – 31, 2007 – Brazos River Basin

Lake Whitney: Water samples were collected by Baylor scientists at 3 locations this week on Lake Whitney. TPWD Kills and Spills biologist Joan Glass examined the samples and found small amounts of golden alga at the sample collected near the Katy Bridge and at the Dam. Golden alga was not present in the sample near White Bluff. No fish kills due to golden alga have been reported anywhere in Texas for several months.

August 6, 2007 – Red River Basin

Lake Diversion: A routine water sample collected on Lake Diversion near the dam by Dundee State Fish Hatchery staff on August 6 did not have any detectable golden alga present.


June 18, 2007 – All River Basins

All River Basins: No fish kills due to golden alga have been reported throughout Texas in several weeks, although golden alga continues to be present in several waterbodies. Biologists continue to monitor our lakes and rivers, and more information will be posted as it becomes available.

June 15, 2007 – Brazos (Lake Whitney, Possum Kingdom Reservoir), Colorado (Colorado City Lake, Moss Creek Lake, E.V. Spence Reservoir), and Red River Basins (Diversion Lake)

Brazos River Basin, Possum Kingdom Reservoir – A water sample was collected on June 12 by TCEQ biologists at Rock Creek Camp. Golden alga was not present in the sample.

Lake Whitney – Water samples were collected on May 30 by biologists from Baylor University. Golden alga was present but not dominant at all six locations (Dam, halfway between the dam and the Katy Bridge, Katy Bridge, halfway between the Katy Bridge and White Bluff, White Bluff, and below Nolan). All samples contained good green algae, bacteria, diatom, and cyanobacteria populations.

Colorado River Basin, Colorado City Lake, Moss Creek Lake, E.V. Spence Reservoir – Water samples were collected on June 4 by TPWD Inland Fisheries biologists. Golden alga was present in samples from all three locations but was only dominant at Colorado City Lake. Samples from both Moss Creek Lake and E.V. Spence Reservoir contained mixed algal populations. No fish kills have been reported in these areas recently.

Red River Basin, Diversion Lake – A water sample was collected on June 4 by TPWD Inland Fisheries biologists. Golden alga was present in the sample in low numbers.

May 10, 2007 – Colorado River Basin (Colorado City Lake, Moss Creek Lake, E.V. Spence Reservoir)

No additional dead fish at previous sites or new fish kill sites were reported in Texas last week.

Colorado River Basin, Colorado City Lake, Moss Creek Lake, E.V. Spence Reservoir – Water samples were collected on May 7. Golden alga was present in all samples but was only dominant at the state park at Colorado City Lake and at Wildcat at E.V. Spence Reservoir. Golden alga was not dominant at I-20 at Colorado City Lake, at the Boat Ramp at Moss Creek Lake, and at Paint Creek at E.V. Spence Reservoir. No dead fish have been reported in these areas recently.

May 1, 2007 – Rio Grande Basin (Pecos River), Red River Basin (Lake Texoma, Lake Diversion), Brazos River Basin (Possum Kingdome Reservoir), Colorado River Basin (Colorado City Lake, Moss Creek Lake, E.V. Spence Reservoir, Beal Park and C.J. Kelly Park Ponds in Midland)

Rio Grande Basin, Pecos River – The fish kill due to golden alga on the Pecos River between Sheffield and the Val Verde County line continues. Kills and Spills Team biologist Stephen Twidwell investigated last week and observed dead channel catfish, gizzard shad, and common carp. Biologists continue to monitor the area.

Red River Basin, Lake Texoma, Lake Diversion – Golden alga was not dominant in any water samples collected from Lake Texoma on April 24; golden alga was present in four of the samples (Slicum Slough, Cedar Mills, Flowing Wells, and Mill Creek) and was not present in four of the samples (Cedar Bayou, Highport Marina, Dam Ramp, and Preston Point). No fish kills have been reported from this area recently. Water samples collected by hatchery personnel at Lake Diversion on April 23 had golden alga present; no dead fish have been reported from this lake recently.

Brazos River Basin, Possum Kingdom Reservoir – Golden alga was present and dominant in water samples collected by hatchery personnel from the dam at Possum Kingdom Reservoir on April 23. In water samples collected earlier by Kills and Spills Team biologist Joan Glass, golden alga was present and dominant at Caddo Creek and present but not dominant at other locations. No dead fish have been reported from this reservoir since the beginning of April.

Colorado River Basin, Colorado City Lake, Moss Creek Lake, E.V. Spence Reservoir, Beal Park and C.J. Kelly Park Ponds in Midland – Water samples were collected on April 23. Golden alga was present and dominant at the state park at Colorado City Lake, at the boat ramp at Moss Creek Lake, and at Paint Creek at E.V. Spence Reservoir. Golden alga was not present at Beal Park or C.J. Kelly Park Pond in Midland. No dead fish have been reported in these areas recently.

April 19, 2007 – Rio Grande Basin (Pecos River), Colorado River Basin (Runnels County)

Rio Grande Basin, Pecos River – Dead fish (mostly gizzard shad but also bass, carp, and catfish) were reported on Monday April 16 in the Pecos River near Iraan. The water was golden-colored. TCEQ biologist Greg Larson investigated the river on Tuesday and did not observe dead fish, although he reported stressed, lethargic fish and golden-brown water. He collected water samples at four locations (Iraan @US 190, Olsen Road off Hwy 349, Sheffield and US 290, and near Val Verde County); golden alga was present and dominant in all four samples, and large amounts were present in the Sheffield site. Biologists continue to monitor the area, and more information will be posted as it becomes available.

Colorado River Basin, Private pond in Runnels County – Inland Fisheries biologist Craig Bonds confirmed golden alga was present in water samples collected by a private pond owner in Runnels County. The private pond owner reported a fish kill in his pond following the cold front during the Easter Weekend. Golden alga is suspected in this fish kill. Two other pond owners near San Angelo have reported fish kills following cold fronts.

April 5, 2007 – Brazos River Basin (Possum Kingdom Reservoir)

Brazos River Basin, Possum Kingdom – Kills and Spills team biologist Joan Glass reported results from a water sample collected at Rock Creek Camp on Possum Kingdom Reservoir on March 30. Golden alga was present but not dominant in the sample.

No reports of freshly dead or dying fish have been received this week. The only dead fish reported were two week old dead carp.

April 2, 2007 – Brazos River Basin (Lake Brazos), Colorado River Basin (Laguna Park in Midland), Rio Grande Basin (Pecos River)

Brazos River Basin, Lake Brazos – Kills and Spills team biologist Joan Glass monitored Lake Brazos this past week; foaming and a few dead/dying fish were still present in the area around the Brazos Queen near IH-35. No updates or reports from other areas of concern in the Brazos River Basin have been received.

Colorado River Basin, Laguna Park in Midland – Inland Fisheries staff reported 100 dead trout in Laguna Park, an urban pond in Midland. Golden alga is suspected. More information will be posted when it becomes available.

Rio Grande Basin, Pecos River – The local game warden has not received any additional calls concerning dead fish in the river.

March 27, 2007 – Brazos River Basin (Lake Whitney and Possum Kingdom Reservoir, Brazos River near Rosenberg), Rio Grande River Basin (Pecos River), Red River Basin (Lake Diversion)

Brazos River Basin, Lake Whitney – Kills and Spills team biologist Joan Glass monitored Lake Whitney this week; the fish kill there continues. Dying fish were found in the McCowan Valley and Steele Creek areas.

Lake Possum Kingdom – Fish kills continue to be reported on Possum Kingdom Lake. Fish losses are difficult to estimate due to heavy feeding by large flocks of birds in the area. Water samples collected on March 26 from the Dam had golden alga present but not dominant; overall algal density was low.

Brazos River North of Rosenburg – Kills and Spills team biologist Winston Denton reports that a fish kill due to golden alga in the lower Brazos River is over. During the past few weeks, hundreds of dead fish were reported in the lower Brazos River between San Felipe and Rosenburg. Golden alga was present in water samples collected from the fish kill. No dead fish have been reported recently.

Rio Grande Basin, Pecos River – Golden alga in large amounts has been confirmed in three water samples (at FM 867, at the dam, and at FM 302) collected from the fish kill in the Pecos River near Mentone. An estimated 13,263 fish have been killed, mainly carp, gizzard shad, channel catfish, and Gulf killifish. The water in the area is golden-brown, and vultures are presently feeding on the dead fish. Dead fish have not been reported near or below the town of Pecos on the river. A news release (link: http://www.tpwd.state.tx.us/newsmedia/releases/?req=20070326a ) was issued on March 26 regarding this fish kill.

Red River Basin, Lake Diversion – Water samples collected by the Dundee State Fish Hatchery from Lake Diversion on March 26 had golden alga present.

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Aditional Information:

Would you like to know more?
The Biology of Golden Alga summarizes what we know about the alga and its toxins.

Where does golden alga fit compared to other single-celled organisms?
The Golden Alga Family Tree gives examples of and information about golden alga and other protists.

What does golden alga look like?
TPWD Golden Alga Images has photos of fish kills, golden algal cells, and short videos of live golden alga. These images may be used for noncommercial/educational purposes as long as TPWD is given credit and other site policies are followed.

Golden Alga Information Card: TPWD has collaborated with TCEQ and other entities to produce a golden alga information card(pdf document). The purpose of this card is to educate the public on golden alga blooms and answer some common questions. Hard copies of this card are available for free by contacting 512 389-8750.

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