The dam was built in 1948. [Video]
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| Photo via details via $1.8b saved via Facebook Center Hill Dam on the Caney Fork River in Lancaster, Tenn., discharges water from its spillways April 8, 2021. (USACE Photo by Lee Roberts) This is one of four dams that held 1.8m acre-feet of water from a 7.01" rain event during March 27-28. This rainfall storage kept the river level in Nashville at 40.55' instead of a predicted level of 55.7' if the dams did not exist. The flood stage in Nashville is 40'. |
We can clearly see the peak in the blue line that happened in late March.
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| USACE-basin |
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| USACE-basin |
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| USACE-dam Three 45kw generators can supply an average city of 125,000 people. The max height is 250'. The length is 2160' of which 1382' is concrete and 778' is earth. |
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| CJ McDowell posted Center Hill Dam in TN. |
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| Arlind Dukagjini posted Center Hill Dam built in 1948 |
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| Nicole Sweeney posted, cropped Center Hill Dam, about 1949 Lloyd Scott Hardin shared |
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| WKRN This is a second dam that I have learned about that was built on a cave system and cost the USACE a lot of money. The first one was the 1913 Hales Bar Dam that got replaced by the Nickajac Dam in 1967. In 2005 this dam was classified as a high-risk dam and the USACE spent 15 years and $353m to fix the foundation. "The good news is, that it’s all fixed now. But it was a monumental engineering feat that took three steps to complete and fifteen years to complete. "First, there was a grouting project at the main dam embankment and left rim. The contractor pumped flow-able concrete into the foundation to fill voids. "Then there was a 2.5-feet thick foundation cut-off wall installed on the lake-side of the dam. It extends as deep as 308-feet from the top of the dam, deep into the solid-rock foundation to prevent future seepage through the limestone. "There were also repairs made to a secondary auxiliary dam on the east side of the main dam. Some refer to it as a ‘fuse plug’ dam that would be used to alleviate pressure on the main dam if a major flood ever occurred." For those fifteen years, the reservoir was drawn down to 18'. That left all of the recreation facilities around the lake high and dry. |
I presume this is the fuse plug. It looks like this was another valley that needed a dam.
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| Satellite |
Nashville district posted seven photos with the comment: "LANCASTER, Tenn. (Nov. 5, 2021) – The National Inventory of Dams is being updated at the end of the year and the U.S. Army Corps of Engineers plans to feature Center Hill Dam in a video as part of its rollout with the public."
Cory Fisher: Did you get a picture of the low oxygenated releases too?
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| Screenshot Are we seeing water that is leaking through the foundation of the dam? If so, I can't believe the reservoir is still full. Hydropower doesn't seem to be worth that level of risk. |
I could not find any details (diagrams) about the work that was done. Note that the information I did find came from the press and not USACE's web site. But it was a while since the street view car drove over the dam, so it captured some of the repair work.
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| Street View, Aug 2013 |
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| Street View, Aug 2013 |
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| Street View, Jul 2014 |
And they were doing something beside the dam as well.
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| Street View, Aug 2013 |
USACE, Nashville District posted six photos with the comment:
Modernizing Hydropower at Center Hill DamThe major turbine-generator replacement project at Center Hill Dam, completed in 2021, marked a significant investment in the region’s renewable energy future and was the first major turbine generator rehabilition in the Cumberland River System. This comprehensive rehabilitation modernized critical powerhouse equipment, replacing 75 year old turbine runners, generators, and associated systems with upgraded, high-efficiency technology. Investing in infrastructure upgrades ensures that legacy hydropower facilities continue delivering dependable, carbon-free power for the communities that rely on them. This is a strong example of how modern engineering can preserve and enhance critical energy infrastructure.
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| CivilGEO Inc. Software posted Corps Simulates 34,000 CFS Release at Center Hill Dam The U.S. Army Corps of Engineers Nashville District recently conducted a dam safety tabletop exercise at Center Hill Dam, testing how agencies would respond to a severe high-water event involving 7 inches of rainfall. The scenario required water managers to release 34,000 cubic feet per second, a flow that would overtop the Caney Fork River channel downstream. The decision highlights the balance between reservoir storage, downstream channel capacity, and the operating conditions of other dams in the Cumberland River Basin. The exercise also showed the practical value of inundation maps. Hydraulic results become evacuation routes, identify affected areas, and help emergency officials determine where people and infrastructure are in the flood path. A release decision is a routing calculation with a deadline attached. |
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