“…The basin consists of 80 acres, of which 69 acres are offsite and 11 acres are on DFC property (table 2 and Additional basin and channel characteristics such as the area, centroid, channel length, channel slope, basin slope, total relief and elevation of the gaging site are given in table 3 (Alley and Veenhuis, 1979). Several studies of the offsite drainage have been published including one study of potential flood hazard by Grozier and others (1975); three hydro!ogic-data reports by Ellis and Alley (1978), Gibbs (1981), and Gibbs and Doerfer (1982); two hydro!ogic simulation reports by Ell is and Alley (1979) and Ell is and others (1983); and three drainage studies (Hydro-Triad, Ltd., 1973;1974;. The north tributary accounts for an additional 549 acres that drain to a series of retention storage ponds.…”