National Program of Inspection of Non-Federal Dams, Tennessee. Nolan Lake Dam (Inventory Number TN 15741), Mississippi River Basin, near Memphis, Tennessee, Shelby County, Tennessee. Phase I Investigation Report

摘要

Nolan Dam has an 8.44 acre lake and is located in Shelby County, Tennessee, south of Winchester Road and east of Ross Road, and is an earth fill embankment 14.7 feet high and 640 feet long. The crest varies from 9 feet to 12 feet in width. Facilities for discharge from the reservoir are located in the east abutment and include an inlet section with a bottom width of eight feet and vertical broken concrete masonary walls two feet high. The emergency spillway is crossed by a farm road approximately 50 feet from the entrance and the fill contains four 18 inch corrugated metal pipes protected by a concrete headwall on both sides of the road. A four inch cast iron draw down pipe with a gate valve at the discharge end is located at approximately the center of the dam. The embankment slopes are approximately 1V on 3H on 2.3H to the top of the dam on the upstream slope. Neither slope has undesirable vegetation. A broken concrete masonry wall provides the vertical section of the upstream slope. Nolan Dam is in the small size category and has a downstream hazard potential classification of high by the Corps of Engineers and I by the State of Tennessee.