General

• Region (Map) : .......... Great Plains
• State (Map) ................ Colorado
• County ........................ Larimer
• Project: ........................ Colorado Big Thompson
• Dam type: ................... Earthfill
• Location: .................... 4 mi NW of Fort Collins
• Watercourse: ............. Offstream storage
• Reservoir: ................... Horsetooth
• Construction Date: ....1946-1949
• National ID Number ... CO01665
• Hydrologic Unit Code ...

Dimensions

• Crest Elevation of Dam: ..................... 5443.0 ft¹
• Structural Height of Dam: .....................   30.0 ft
• Crest Length: ........................................   348.0 ft
• Top of Joint Use: ...................................        NA
• Top of Active Conservation: ............. 5430.0 ft
• Top of Inactive Conservation: ............5325.0 ft
• Spillway Crest: .......................................        NA
• Top of Dead Storage: .......................... 5270.0 ft
• Streambed at Dam Axis : .....................        NA

        ¹ 1988 modification raised the dam crest to elev. 5443.0 feet

Hydraulics

• Normal Water Surface Elev: ................5430.0 ft
• Hydraulic Height: .......................................   NA
• Service Spillway Type:
•    Uncontrolled  Crest    .................................No
•    Morning-Glory ........................................... No
•    Crest Length    ........................................... NA
•    Gated      ....................................................... No
•    Capacity at Elev:  0  ft,                             0 cfs
• Auxiliary Spillway ......................................... No
•     Capacity at Elev.   .................................. 0 cfs
• Outlet Works Capacity at

    Elevation  0 ft.,  ...................................... 0 cfs 

Hydrology

• Drainage Area: .................................. 17.0 sq mi
• Hydrometeorological Report               HMR 55

Flood Type: ...............................Winter General

• Storm Duration: ....................................... 72 hrs
• Probable Maximum Flood (PMF) Report:

  Peak Inflow: ..................................... 96,800 cfs

•   Inflow Volume: .........................  21,520 acre-ft
•   Flow Duration: ....................................... 14 hrs
•   PMF Routing MWS Elev.: ........................ NA
•   Initial Routing Elev: ........................... 5430.0 ft
•   Study Date: ............................. December 1982