General

• Vicinity Map
• Region (Map) ....................... Great Plains
• State (Map) ....................... South Dakota
• County ....................................... Fall River
• Project ...................... PSMBP-Angostura
• Dam type ...................... Concrete gravity
• Location ...... 9 mi SE of Hot Springs, SD
• Watercourse ................. Cheyenne River
• Reservoir ................................ Angostura
• Original construction ............. 1946-1949
• National ID Number .................. SD01099
• Hydrologic Unit Code .............

Hydraulics

• Total storage to
    El. 3187.2 ......................... 138,761 acre-ft
• Service spillway
    Capacity at El. 3198.1 .......... 247,000 cfs
• Outlet works
    Capacity at El. 3198.1 .................. 590 cfs

Dimensions

• Crest Elevation .............................. 3199.0 ft
• Structural Height ................................ 193 ft
• Hydraulic Height ................................ 136 ft
• Crest Length ..................................... 2,030 ft
• Crest Width ........................................... 10 ft
• Base Width ......................................... 230 ft
• Volume of Concrete ............. 850,000 cu yd

Hydrology

• Drainage area ............................ 9,034 sq mi
• Hydrometeorological Report .. HMR 51-52
• PMF ......... 1983 General All Season Storm
• Volume ....... 1,812,000 acre-ft over 12 days
• Peak inflow ................................ 625,500 cfs
• Maximum water surface ................ 3198.1 ft