Missouri Geological Survey Director: Carey Bridges, RG
Regulated dams in Missouri must have and maintain adequate freeboard, which is defined as the difference between the maximum water surface elevation (MWSEL) of the reservoir and the principal spillway crest. The MWSEL is determined for a dam by taking into account the hydrology of the land draining to the lake and the hydraulics of the spillway. As earthen dams settle over time, Dam and Reservoir Safety Program staff recommend that dams have more freeboard than is required (available freeboard). This is the difference between the low point on the dam crest and the principal spillway crest.
Nothing in this document may be used to implement any enforcement action or levy any penalty unless promulgated by rule under chapter 536 or authorized by statute.
For more information
Dam and Reservoir Safety Program
Missouri Geological Survey
P.O. Box 250
Rolla, MO 65402-0250
United States