Embankment Dams - General Considerations

The Corps of Engineers Engineering Manual (EM), "Earth and Rock-fill Dams, General Design and Construction Considerations," EM 1110-2-2300, 31 July 94,  is an excellent reference for an overall view of the important aspects of dam design. Examples include:

Types from Figures 2-1 & 2-2 of ...2300

...b. Elevation. In seismic zones 2, 3, and 4, as delineated in Figures A-1 through A-4 of ER 1110-2-1806, the elevation of the top of the dam should be the maximum determined by either maximum water surface plus conventional freeboard or flood control pool plus 3 percent of the height of the dam above streambed. This requirement applies regardless of the type of spillway.

The USBR (US Bureau of Reclamation) also has an excellent reference entitled "Design of Small Dams." Available only by purchase from the US GPO.