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<br />. <br /> <br />0077 <br /> <br />HYDROLOGY <br /> <br />Contributing drainage area above <br />Annual runoff, average <br />Kersey, Colo. (1947-1961). . . <br />Narrows Darn site (estimated) <br />Annual runoff, maximum <br />Narrows Darn site (estimated) <br />Annual runoff, minimum <br />Narrows Darn site (estimated) <br />Peak daily discharge of record <br />Kersey, Colo. <br />Minimum daily discharge of record <br />Kersey, Colo. <br />Inflow design flood: <br /> <br />Narrows Darn site <br /> <br />. <br /> <br />. <br /> <br />. . . . . <br /> <br />Historical floods: <br /> <br />Volume, 20 days. <br />Peak discharge . . . <br />1844, 1864, 1867, 1876, <br />1921, 1933, 1935, 1965 <br /> <br />. . <br />1894, <br /> <br />REMARKS <br /> <br />Narrows Unit <br />August 1966 <br /> <br />. <br /> <br /> 13,450 sq. mi. <br /> 537,200 ac.-ft. <br /> 365,200 ac.-ft. <br /> 663,400 ac.-f't. <br /> 115,700 ac.-ft. <br />. 31,000 c.f.s. <br />. 28 c .f.s. <br />1,363,000 ac. -ft. <br /> 344,000 c.f.s. <br /> <br />The Narrows Unit was authorized as a unit of the Missouri River <br />Basin Project by the Flood Control Acts of 1946 and 1950. Precon- <br />struction activities were initiated in 1947 but were subsequently <br />terminated due to local opposition. Reauthorization of the unit <br />became necessary with passage of Public Law 88-442, 88th Congress, <br />H. R. 9521 on August 14, 1964. <br /> <br />. <br /> <br />The Lower South Platte Water Conservancy District was formally <br />organized on May 6, 1964. The district has indicated its willingness <br />to contract for supplemental water to be made available by unit. <br />However, in order to establish a firm repayment arrangement, which <br />will be a prerequisite to the commencement of construction, it will <br />be necessary for the district to enter into appropriate contracts <br />with participating ditch companies, irrigation districts, and/or other <br />users. <br /> <br />. <br /> <br />7 <br />