General

• Region (Map) : ...................Great Plains Region
• State (Map) .......................  Texas
• County ................................ Tom Green
• Project: ................................ San Angelo
• Dam type: ............................Earthfill
• Location: ....................... 9 mi SW of San Angelo
• Watercourse: ..................... Spring Creek
• Reservoir: ........................... Twin Buttes
• Construction Date: ............1960-1963
• National ID Number .......... TX00022
• Hydrologic Unit Code ......

Dimensions

• Crest Elevation of Dam: ...................... 1991.0 ft
• Structural Height of Dam: ..................... 134.0 ft
• Crest Length: ........................................ 42,460 ft
• Top of Joint Use: ......................................... NA
• Top of Active Conservation: ............. 1940.2 ft
• Top of Inactive Conservation: ........... 1940.2 ft
• Spillway Crest: ...................................... 1969.1 ft
• Top of Dead Storage: ...........................1885.0 ft
• Streambed at Dam Axis : .............................. NA

Hydraulics

• Normal Water Surface Elev: ............... 1940.2 ft
• Hydraulic Height: .................................. 122.0 ft
• Service Spillway Type:
•    Uncontrolled  Crest    ................................Yes
•    Morning-Glory ........................................... No
•    Crest Length    ..................................... 200.0 ft
•    Gated      ....................................................... No
•    Capacity at Elev:  xxxx.0  ft,                x,xxx cfs
• Auxiliary Spillway ......................................... No
•     Capacity at Elev.   .................................. 0 cfs
• Outlet Works Capacity at

    Elevation  xxxx.0 ft.  .......................... x,xxx cfs

Hydrology

• Drainage Area: ................................. sq mi
• Hydrometeorological Report      HMR
• Flood Type: ...............................General
• Storm Duration: .......................................  hrs
• Probable Maximum Flood (PMF) Report:
•   Peak Inflow: ..................................  cfs
•   Inflow Volume: ........................  acre-ft
•   Flow Duration: ......................................0 days
•   PMF Routing MWS Elev.: ................. x.0 ft
•   Initial Routing Elev: ............................ x.0 ft
•   Study Date: