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.

Outdoor Chattanooga News And Events

Here are upcoming news and events from Outdoor Chattanooga: Outdoor Chattanooga Featured Event Fireside at Greenway  Oct. 30 Erin Medley and a starry night Outdoor Chattanooga will finish our 2014 Fireside at Greenway Farm series with a special evening of guitar folk and stargazing this Thurs., Oct. 30, 7 ... (click for more)

Governor Haslam Dedicates Trail At Pogue Creek Canyon State Natural Area

Governor Haslam joined staff from the Tennessee Division of Natural Areas, Tennessee State Parks and the Tennessee Parks and Greenways Foundation last Friday to dedicate a new trail at Pogue Creek Canyon State Natural Area. “Tennessee has incredible natural areas that offer something for everyone, and this partnership will help protect and preserve these lands for future generations ... (click for more)

Two North Shore Sold To Pennsylvania Real Estate Firm For Almost $24 Million

The Two North Shore commercial development on Manufacturers Road in North Chattanooga has been sold to a Pennsylvania real estate firm for  $23,983,363. Steve Arnsdorff, who developed the successful center from the ground up and has continued to manage it, said the deal closed last week. He said the sale for the property at 319 Manufacturers Road is to Stoltz Real Estate ... (click for more)

Lookout Valley Middle High School Closed Friday Due To Water Main Break

County school officials said late Thursday night that LookoutValley Middle High School will be closed Friday due to a water main break. Officials said, "This is an official message from the Hamilton County Department of Education to the parents, faculty, and staff of Lookout Valley Middle High School.  Please accept our apologies for the lateness of this message. "Due ... (click for more)

Thanks For Publishing The Stokes Photo Book

I pre-ordered the Stokes Photo Book and picked it up Wednesday . The covers and content are very high quality and contain photos you will not see anywhere else.  This book of photos is worth much more than $35.  I have seen many historic photos of my hometown Chattanooga, but this collection is amazing. My favorites are National Cemetery, Confederate Cemetery near ... (click for more)

Roy Exum: Saban: ‘Ratings Don’t Matter’

When the first College Football Playoff rankings were released earlier this week, Alabama football coach Nick Saban got it right on the button when he shrugged, “I don't even care, to be honest with you." "To me, none of it matters, What does it matter?” he laughed at the Tide’s No. 6 ranking. “I mean, it only matters where you end up at the end. So what matters to us is how ... (click for more)