National Program of Inspection of Non-Federal Dams, Tennessee. Reed Lake Dam Number 1, (Inventory Number TN 16706) Loosahatchie River Basin near Millington, Tipton County, Tennessee. Phase I Investigation Report

摘要

Reed Lake Dam No. 1 has a 10.1 acre lake and is located in Tipton County, Tennessee one mile north of the Shelby County line and one mile west of Highway 51, and is an earth fill embankment 16.5 feet high and 530 feet long with a crest width of 14 feet. Facilities for discharge from the reservoir are a concrete service spillway, 6.8 feet high with inside dimensions of 2.1 feet by 2.7 feet and a 15 inch concrete barrel and an emergency spillway in a natural draw located on the west abutment of the dam. The natural draw has a bottom width of 33 feet and side slopes of 1V on 31H and 1V on 21H. The embankment slopes are 1V on 1.2H on the upstream slope and 1V on 3H on the downstream slope. Both slopes have some undesirable vegetation. The dam is in the small size category and has a downstream hazard potential classification of high by the Corps of Engineers and of I by the State of Tennessee. On the basis of hydraulic analysis, Reed Lake Dam flood storage (33 ac-ft) and spillways are inadequate to safely pass the 1/2 Probable Maximum Flood (PMF), which Office of the Chief of Engineers (O.C.E.) Guidelines specify to be the design flood for a dam in the small size and high hazard categories. Reed Lake Dam No. 1 is considered 'Unsafe-Non-emergency'.