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part--I Summary PROJECT FEATURES (continued), Two Forks Powerplant Located at the toe of Two Forks Dam Number of units. . . . . . . . . . . . . . . . . . . . '. . . . . . . . . . . . . . . . 2 Designed capacity-. . . . . . . . . . . . . . '. . . . . . . . . . . . . . . . . . .. 138 Mw Type of generation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ., peaking power Type of controls.,. . Remotely controlled from the USBR Flatiron Control Center Two Forks Switchyard Located above Two Forks Dam on the left side of the canyon Capacity of transformers.......................... .170, 000 Kv. '-a. Transmission Lines 115 kv. line (Line No.1) to the Waterton Substation.... 115 kv. line (Line No.2) to the Waterton Substation.... 115 kv. line to the Erie Substation................... 7 miles 7 miles 55 miles HYDROLOGY Contributing drainage area above Two Forks Damsite.... 2,585 sq. mi. * Annual runoff, average............................... 242, 400 ac. -ft. Annual runoff, maximum.............................. 550,900 ac. -ft. (1970 w.y.) Annual runoff, minimum.............................. 86, 700 ac. -ft. (1963w.y.) Peak daily discharge of record. . . . , . . . . . . . . . . . . . . . . . . . 6,320 c. f. s. June 8, 1921 Minimum daily discharge of record. . , . . . . . . . . . . . . . . . . . 10 c. f. s. Dec. 5, 1899 Inflow design flood: Volume, 20 days. . . . . . . . . . . . . , . , . . 600,300 ac. -ft. Peak discharge. . . . . . . . . . . . . . . . . . . . . . . 0" . . . . . . . . . . . .. 99,300 c. f. s. Historical floods: The first major flood recorded on the South Platte River occurred In 1844. Other major floods occurred In 1864, 1867, 1876, 1894, 1921, 1933, and 1965. * Does not include the 335 square miles of the Blue River Basin which Is a source of Imported supplies to the North Fork of the South Platte River from Dillon Reservoir 1.11