Walleye In Center Hill Lake Threatened By Low-Dissolved Oxygen Levels

Friday, October 11, 2013

Over the past few weeks several dead walleye have been observed at Center Hill Lake. Walleye prefer a cool-water habitat, which means they are usually located fairly deep in the lake this time of year. This year the dissolved oxygen levels in this zone are very low. Data collected Thursday indicated that the only area deeper than about 35 feet that contains any oxygen is a zone between depths of 60-to-90 feet, and even there the levels are quite low.

“This isolated zone of cool, oxygenated water has gotten much smaller over the last few weeks as natural processes in the lake have depleted oxygen from the water. If there are significant numbers of walleye and other fish trapped in this zone they may not be able to survive long enough for the lake to mix and restore oxygen to these lower depths,” said Bob Sneed, U.S. Army Corps of Engineers Nashville District Water Management Section chief.

The low oxygen levels are primarily due to a series of rainfall events during the spring and summer that resulted in a loss of oxygenated water from persistent higher flows from the dam. A lower lake pool while maintenance is ongoing at the dam is also a contributing factor. Cooler nights are helping to restore oxygen levels at lower depths, but Corps officials aren’t sure yet if large numbers of fish could be affected before mixing of oxygen at lower depths can occur.

Mr. Sneed said that warmer lake temperatures also translate into warmer water temperatures in the Caney Fork River downstream of Center Hill Dam where a major put, grow, and take trout fishery is managed by the Tennessee Wildlife and Resources Agency. 

“The trout are likely to be stressed and they may not feed as aggressively as normal, but I would not expect a major die-off of fish in the river,” Sneed said. “We will continue to blend sluice gate releases with hydropower releases to support the downstream environmental resources.”

There are no physical or operational actions that can be applied to alleviate this condition. Corps of Engineers and TWRA staff will continue to work together and monitor the situation.

For more news and updates go to http://www.lrn.usace.army.mil and follow the Nashville District at www.facebook.com/nashvillecorps.

National Archery In Schools Program Subject For June Nature At Noontime

The National Archery in the Schools Program (NASP), will be the subject for the Tennessee Wildlife Resources Agency’s June Nature at Noontime program. The program will be held on Thursday, June 2, from noon-1 p.m. at the TWRA’s Region II Ray Bell Building located in the Ellington Agriculture Complex. Don Crawford, TWRA assistant chief for Information and Education and the ... (click for more)

TWRA Officials To Attend Meeting In Regard To Kentucky Lake Crappie Fishery

Officials from the Tennessee Wildlife Resources Agency are among those who will be attending a public meeting regarding the crappie fishery on Kentucky Lake. The meeting, requested by State Representative Tim Wirgau, will be held on Tuesday, June 14, from 7-8:30 p.m. in the Enoch Building at the Henry County Fairgrounds in Paris. TWRA fisheries personnel will attend to share ... (click for more)

Attorney Says Lacie Stone, Advisor To Mayor Berke, Is Victim, Not Instigator

The attorney for advisor to Mayor Andy Berke Lacie Stone said she has been thrust into the spotlight, but said she is "the victim of an unprovoked attack" by her husband, Bobby Stone. Attorney John Cavett said it is ridiculous "to suggest that she was the perpetrator." Mr. Stone is facing charges of domestic assault and vandalism. Attorney Cavett said, "It is unfortunate ... (click for more)

Dr. Russell Dyer Chosen As Director Of Schools By Cleveland City School Board

The Cleveland City School board unanimously voted Thursday afternoon to offer the job of director of Schools to Dr. Russell Dyer. Dr. Dyer serves as the chief of staff of schools in Collierville, Tn.  If Dr. Dyer accepts the school board's contract, he will be paid $132,500 a year.  After contract negotiations, the board plans for Dr. Dyer to start at Cleveland City ... (click for more)

Case Handled Like Any Other? - And Response

It is interesting that Chief Fletcher would deem the handling of the Mayor's encounter as typical or normal. Is the Chief asking the public to believe that all misdemeanor domestic violence arrests include a 4-hour taped interrogation, and delayed reporting after a visit to the Chief’s house. Of course, we believe that Chief Fletcher. April Eidson * * *  I ... (click for more)

Roy Exum: A Judge's Night Behind Bars

There is very little doubt that retired Army Sergeant Joe Serna has Post Traumatic Stress Disorder (PTSD) after serving three tours as a Green Beret in Afghanistan. Once he barely avoided being blown up by a hidden IED and then there was another terrifying brush with a suicide bomber. But the worst was when a truck he was in slid off the roadway into a canal. “It was like ... (click for more)