TWM provided lake and dam engineering services for this project at the Fairwood Hills Estates. We designed the replacement of the principal spillway system for the 30-foot high and 475-foot long Class I earthen fill dam for Fairwood Hills Estates in O’Fallon, Illinois. The surface area of the lake is 16.4 acres, and serves a 363-acre watershed. The lake impounds approximately 193 acre-feet of water. The principal spillway is a 78-inch concrete drop inlet spillway which discharges to a 60-inch reinforced concrete outlet pipe. Among TWM’s tasks: topographic survey; hydrologic / hydraulic analysis; design of the drop inlet principal spillway structure; design of the impact stilling basin.
Visit Lake & Dam.