General

• Region (Map) : ..................Upper Colorado
• State (Map) ...................... Colorado
• County .............................. Mesa
• Project: .............................. Collbran
• Dam type: ......................... Earthfill
• Location: .......................... 12mi SE of Collbran
• Watercourse: ................... Atkinson Creek
• Reservoir: ......................... Atkinson
• Construction Date: ..........1893-1893
• National ID Number ........ CO00937
• Hydrologic Unit Code ....

Dimensions

• Crest Elevation of Dam: .....................10145.0 ft
• Structural Height of Dam: ..................      35.0 ft
• Crest Length: .......................................    750.0 ft
• Top of Joint Use: ..................................        NA
• Top of Active Conservation: ........... 10141.0 ft
• Top of Inactive Conservation: .........           NA
• Spillway Crest: ...................................  10141.0 ft
• Top of Dead Storage: ........................           NA
• Streambed at Dam Axis : ...................           NA

Hydraulics

• Normal Water Surface Elev: .............10141.0 ft
• Hydraulic Height: ...............................     31.0 ft
• Service Spillway Type:
•    Uncontrolled  Crest    ............................. Yes
•    Morning-Glory ......................................... No
•    Crest Length    ......................................... NA
•    Gated      .................................................... No
•    Capacity at Elev:  0.0  ft,                       0 cfs 
• Auxiliary Spillway ...................................... No
•     Capacity at Elev.   .............................. 0 cfs 
• Outlet Works Capacity at
•     Elevation  0 ft.,  ................................... 0 cfs 

Hydrology

• Drainage Area: .................................. 0.52 sq mi
• Hydrometeorological Report               HMR 49
• Flood Type: ...............................Winter General
• Storm Duration: ........................................ 72 hrs
• Probable Maximum Flood (PMF) Report:
•   Peak Inflow: ............................................ 84 cfs
•   Inflow Volume: ............................... 269 acre-ft
•   Flow Duration: ........................................ 96 hrs
•   PMF Routing MWS Elev.: ....................... N/A
•   Initial Routing Elev: ..........................10141.0 ft
•   Study Date: ............................  September 1969