National Program of Inspection of Non-Federal Dams, Tennessee. Spring Lake Dam (Candlewood II) Old Hickory Dam (Candlewood III) (Inventory Numbers TN 06930 & TN 06926), Hatchie River Basin, near Saulsbury, Hardeman County, Tenness

摘要

Based on the findings of a Phase I inspection of Spring Lake and Old Hickory Lake Dams in Hardeman County; Spring and Old Hickory Lake Dams are in series with each other and with Chancellor Dam upstream. The dams are of similar construction nad have the same owner. Spring Lake Dam is a zoned earthfill embankment 21.5 feet high and 400 feet long with a crest width of 12 feet. The side slopes are 3H;1V upstream and 3.7H:1V downstream. The service spillway is a concrete riser with two 1 ft x r openings leading to a 15 inch concrete pipe passing under the dam. The drawdown drain is a 15 inch diameter gate valve at the base of the riser. The emergency spillway is a trapezoidal earth saddle on the right abutment with an estimated capacity of 3500 cfs. Old Hickory Dam is a zoned earthfill embankment 20.5 feet high and 530 feet long with a crest width of 12 feet. The side slopes are 3.5H:1V upstream and 3.9H:1V downstream. The service spillway is a concrete riser with two 1 x 4 openings leading to a 24 inch concrete pipe passing under the dam. The draw-down drain is a 24 inch gate valve at the base of the riser. The emergency spillway is a trapezoidal earth saddle on the left abutment with an estimated capacity of 4670 cfs. Both dams are in the small size high hazard potential categories. Neither dam shows any overt signs of instability.