General

• Vicinity Map
• Region (Map) ............ Pacific Northwest
• State (Map) ..................................... Idaho
• County ............................................... Gem
• Project .............................................. Boise
• Dam type ...................... Concrete gravity
• Location ............... 5 mi NE of Emmett, ID
• Watercourse ...................... Payette River
• Reservoir ........................... Black Canyon
• Original construction ............. 1922-1924
• Modified ........................ 1951-1952, 1955
• National ID Number ................... ID00282
• Hydrologic Unit Code ..........................

Hydraulics

• Total storage at El. 2497.5: ........ 44,650 acre-ft
• Hydraulic height: .................................. 111.5 ft
• Service spillway
       Capacity at El. 2497.5: ................. 39,060 cfs
• Outlet works
       Capacity at El. 2497: ...................... 1,203 cfs

Dimensions

• Structural height ................................ 183 ft
• Crest elevation .............................. 2500.0 ft
• Crest length ...................................... 1040 ft
• Volume of concrete ............... 79,000 cu yd

Hydrology

• Drainage area: .................................. 2,680 sq mi
• HMR: ................................................................ 43
• PMF: .......................... 1983 Rain-on-snow type
• Volume: ............ 1,099,540 acre-ft over 15 days
• Peak inflow: ...................................... 192,500 cfs
• Maximum water surface: ..................... 2512.0 ft