Ridgway Dam

Overview
Ridgway Dam of the Dallas Creek Project was constructed on the Uncompahgre River in 1987 to increase water supplies for irrigation and municipal and industrial purposes, and to provide flood control. The project also includes recreational development at the reservoir and measures to enhance fishing opportunities on the Uncompahgre River, improve wildlife habitat, and mitigate wildlife losses caused by the reservoir development. No distribution facilities were constructed as part of the project. Water supplies are distributed through existing facilities or facilities constructed by the Tri-County Water Conservancy District or the water users.

General
RegionFacilities in Upper Colorado | Upper Colorado Home Page
StateColorado
CountyOuray
ProjectDallas Creek
Dam TypeRolled earthfill
ReservoirRidgway
WatercourseUncompahgre River
Location6 miles north of Ridgway, Colorado
Longitude-107.74206161499023
Latitude38.19918230382011
Original Construction1978-1987
Modified Construction
National ID NumberCO82912
Hydrologic Unit Code

Dimensions
Structural Height332.9 ft
Hydraulic Height (Normal Operating Depth at Dam)200.00 ft
Top Parapet (Elevation)
Spillway Crest Elevation6871.30 ft
Crest Elevation6888.50 ft
Crest Length2465.00 ft
Crest Width
Base Width
Volume of Dam Construction Materials10,700,000 cu yds
Streambed at Dam Axis6680.00 ft
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)6871.13 ft
Top of Active Conservation Pool (Elevation)6841.80 ft
Top of Inactive Conservation Pool (Elevation)6798.6 ft
Top of Dead Storage Pool (Elevation)6720.0 ft

Hydraulics & Hydrology
Total Water Storage at Elevation
Maximum Water Surface Elevation6880.0 ft
Normal Water Surface Elevation
Spillway Type
Auxiliary SpillwayNo
Spillway Capacity at Elevation8660 cfs at 6880.0 ft
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation500 cfs at 6854.5 ft
Diversion Capacity at Elevation
Drainage Area265.0 sq mi
Hydrometeorological Report (HMR)HMR 49
Probable Maximum Flood (PMF) Report

Contact Information
Owner
TitleArea Office Manager
OrganizationWestern Colorado Area Office
Address2764 Compass Drive, Suite 106
CityGrand Junction, CO 81506
Phone (Office)970 248-0600
Operator
OrganizationTri-County Water Conservancy District
Address

647 North 7th Street
PO Box 347

CityMontrose, CO
Phone (Office)970 249-3369
Phone (Fax)970 249-8277


Last updated: Mar 26, 2009