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In this issue:
River Neighbors goes electronicWe’re trying something new with TVA River Neighbors. This is the first issue that we’re distributing in electronic format only. Eliminating paper copies will help us conserve resources and ensure that you receive up-to-date information about TVA-managed reservoirs and TVA programs to enhance recreational opportunities, water quality, and other benefits. Before you leave the Neighbors page, click on the comment form and let us know what you think about this issue and what topics you’d like to see in future issues. Smooth start under new reservoir operating policyOn May 19, the TVA Board approved it. By June 1, it was up and running. TVA’s new reservoir operating policy, the result of a comprehensive two-year Reservoir Operations Study to determine if changes would result in greater public benefits, shifted the focus from reaching specific summer reservoir elevations to a flow-based approach of efficiently moving water through the river system. The new policy was shaped with extensive public input from citizens all across the Valley, as well as representatives from state and federal agencies.
“It’s been an adjustment, with river flows driving things instead of focusing on targeted elevations on the tributary reservoirs. But overall things have gone smoothly, with no major surprises. “The abundant rainfall really helped the water quality situation below many tributary dams, as well as main-river projects. As a result of the Reservoir Operations Study, we are undertaking a three-year, $17 million capital improvement program to enhance water quality. Since it will take a while for all the new aeration equipment to be installed, it was extremely helpful to be able to start with a good flow year. “With very few exceptions, we’ve also been able to meet the targeted recreational releases as specified under the new policy. We’ve increased the number of projects at which we schedule recreational releases, adding Norris and Ocoee No. 1 and providing more dependable releases at Apalachia and Wilbur. “Naturally, lots of people are happy about the fact that, for the first time, drawdown of the tributary reservoirs will be restricted until Labor Day. Most of the reservoirs are seeing higher levels at this time of year than they have in the past — in some cases, one to four feet higher than would have been the case under our previous operating policy. “Still, it’s important to note that these elevations are highly dependent upon the amount of flows we have to work with; there are no guarantees that, come this time next year, pools will be where they are now. It’s my hope that the public has reasonable expectations of the levels that can be maintained from year to year — and will realize that in most years there will be some drawdown on these tributary pools between June 1 and Labor Day. Restricting the amount of drawdown is not the same as eliminating drawdown.” Learn more about TVA’s Reservoir Operations Study here. Hazardous watersThe closer you get to a dam, the more dangerous it becomes. Upstream, swirling water and strong underwater currents can create dangerous conditions near the powerhouse intake and water release gates. Below dams, sudden discharges from automatically operated turbines, locks, and gates can occur at any time, creating turbulence and rapidly rising water levels.
See for yourself: Watch a short video of what can happen if you boat or fish too close to a dam. Quicktime Movie (5.5 Mb, requires QuickTime) Update on reservoir levelsWhat a difference a month makes — especially if it’s a wet month. Going into Memorial Day weekend, recalls TVA River Forecasting Manager Randy Kerr, “pool levels on the tributary reservoirs were not as high as we would have liked.” A very wet June helped things considerably. “We had plenty of water for hydro generation without impacting summer recreation levels,” he says. “At times, hydro generation was significantly above normal, and yet we were able to keep nine out of 10 tributary projects at or near flood guide levels through the end of July.” The one exception was Hiwassee, which has received significantly less rainfall than other parts of the Valley. According to Kerr, it was a somewhat unusual scenario: “We had quite a few reservoirs that filled early — they were already at their flood guides before Memorial Day weekend — and then it kept raining. We found ourselves in the position of releasing a lot of water from these projects while releasing only minimum flows from other reservoirs that we were still trying to fill.” “Overall,” says Kerr, “we were very fortunate to have enough rain to allow us to release a significant amount of water down the Tennessee River, but not so much rain that it caused any major flooding issues. You’ve heard the expression ‘too much of a good thing’? In terms of rainfall and runoff in the Tennessee Valley, the summer of 2004 might well be described as ‘just enough of a good thing.’” TVA expands reservoir information available to public
Hydro helps meet record summer power demandHydro proves its worth, yet again. As the thermometer climbed into the low 90s, electricity usage began to increase all across the Valley. At 6 p.m. EDT on July 13, TVA reached a new all-time record power demand of 29,966 megawatts.
Without this hydro capacity, TVA would have had to turn to more expensive alternatives, such as utilizing more costly generating methods or purchasing power from neighboring utilities. Mosquito fluctuationsFluctuations in water levels to control mosquitoes will continue through mid-September this year on Chickamauga, Guntersville, Wheeler, and Pickwick Reservoirs. The fluctuations are being extended because the unrestricted drawdown will not occur until after Labor Day weekend under TVA’s new operating policy. These fluctuations, which reduce the need for chemical control, are designed to strand mosquito eggs and larvae on the shore where they dry out and die before the water rises again. Visit Foster FallsLooking for someplace new to visit with your family before the weather turns cold? You’ll find plenty to do at TVA’s Foster Falls Small Wild Area. TVA recently completed a wheelchair-accessible walkway that leads to a spectacular view of Foster Falls, a 60-foot vertical waterfall. Another trail will take you to the waterfall overlook.
Foster Falls Campground is open through November 1. It has 28 campsites, including one handicap-enabled site and handicap-enabled restrooms with heated showers and toilets. The day-use area is open year-round, with picnic tables, grills, and a group pavilion available by reservation. Foster Falls is located about 40 minutes west of Chattanooga, Tennessee. From Tracy City, go five miles east on Highway 150/US 41. Look for the Foster Falls entrance on your left between mile markers 8 and 9. For information about other TVA natural areas and TVA activities related to wildlife habitat protection, send an e-mail specifying your particular area of interest to heritage@tva.gov. More Clean Marinas
Ditto Landing on Wheeler Reservoir and Gold Point Yacht Harbor on Chickamauga Reservoir were recertified this year and will continue to fly the Clean Marina flag in recognition of their efforts to clean up the waterway. Marinas must be recertified every two years to maintain certification. For a complete list of Clean Marinas throughout the Valley, visit here. LakeLine: Information for lake enthusiastsThe North American Lake Management Society (NALMS) is offering its premiere magazine, LakeLine, at an introductory subscription rate of $25 per year. Published quarterly, the magazine contains timely articles and other information about important lake management issues. For more information or to view or order recent issues, go here. Report predicts increase in water use from Tennessee River
“The good news is that we return a greater percentage of water to the Tennessee River than any other USGS water-resource region,” says Gene Gibson, manager of Water Supply Projects at TVA. “About 95 percent of water currently withdrawn within the Tennessee Valley is put back into the river for additional downstream uses.” TVA collaborated in producing the USGS report, which contains information on trends in water use from 1965 to 2000, current withdrawals, and water use projections to the year 2030. Having good data on water availability and water use gives the Tennessee Valley an edge over other parts of the country, says Gibson. “It will help us anticipate where future problems may occur and where growth could be limited due to inadequate water supply. It also will go a long way in helping find ways to avoid conflicts such as the recent water wars among Georgia, Florida, and Alabama.” View a copy of the USGS report, read how TVA manages water supply in the Tennessee River system, and get other water-supply news from TVA’s Water Supply Web site. More new features on TVA’s Web siteA new report on the benefits provided through TVA’s integrated operation of the Tennessee River system in 2003 is available online. According to the report:
The report also provides information on recreation benefits, reservoir health, special operations, and land-use and watershed protection. View the River System Performance Report (PDF file, 656 kb). TVA’s newly released 2002-2003 Environmental Report offers a look at the agency’s environmental performance for the two-year period. It covers TVA’s successes and challenges in improving air and water quality, providing renewable energy sources, and protecting shoreline and wildlife resources. |
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