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.

Youth Hunter Injured In Hunting Accident In Grainger County

A 10-year-old boy from Knoxville was injured Monday evening after he accidentally shot himself in the foot while dove hunting at Buffalo Springs WMA in Grainger County. TWRA officers report that around 5:45 p.m., the young man accidentally fired his shotgun into his foot and was then air lifted to UT Medical Center in Knoxville with non-life-threatening injuries. Records ... (click for more)

Tennessee's 2014 Dove Season Opens Labor Day; Early Canada Goose Season Also Starts

Dove season opens on Labor Day, at noon (local time), which marks the annual start of one of Tennessee’s most long-standing outdoor sports traditions. Tennessee’s 2014 season is again be divided into three segments: Sept. 1 through Sept. 28; Oct. 11 through Nov. 2; and Nov. 29 through Jan. 6, 2015. Hunting times, other than opening day, are one-half hour before sunrise until ... (click for more)

Rhasean Lowry, 34, Charged In Death of 3-Year-Old Girl

Rhasean Lowry, 34, was arrested for abusing a three-year-old girl, and then criminal homicide after she died. Last Tuesday, the Chattanooga Police Department was called on a suspected child abuse case. Lowry took the victim to a local hospital and he stated the victim fell down steps. Doctors advised that the victim’s injuries were the result of blunt force trauma consistent ... (click for more)

City IDB Member Who Made Motion For $9 Million Black Creek TIF Had Not Lived In City For Years

A City Industrial Development Board (IDB) member who made the motion to approve a controversial $9 million Black Creek Tax Increment Financing (TIF) had not lived in the city for years, City Attorney Wade Hinton confirmed. Chris Ramsey, a BlueCross BlueShield official, was not present at an IDB meeting on Tuesday morning. Five other board members were. Citizen Helen Burns ... (click for more)

Decimating The Chattanooga Public Library - And Response

Corinne Hill claims that the library is just undergoing a normal weeding process for eliminating books.  She has bragged that she's responsible for the elimination of over 100,000 books - with more to go. "Normal" weeding is not rampant throwing away.  Yes, books go to the Friends for their sale - where they get $2 for a $75 book and thousands wind up being recycled ... (click for more)

The Many Lessons I Learned From Helen McDonald Exum

Helen McDonald Exum was my friend and mentor. As I think of her passing I can only imagine the celebration that is happening in heaven as the news of her arrival is being told. I am sure that there is a party that not only has she organized but that there is not a detail that has been left to chance. I am sure that it is the grandest of events, for you see, she has been planing ... (click for more)