Lost Creek Dam

Lost Creek Dam is on Lost Creek, 12 miles upstream from its confluence with the Weber River. It impounds a reservoir with a total capacity of 22,510 acre-feet covering a surface area of 365 acres. A zoned earthfill structure 248 feet high with a crest length of 1,078 feet, the dam has a volume of 1,831,820 cubic yards. The uncontrolled spillway on the right abutment has a concrete-lined chute with a capacity of 2,455 cubic feet per second. The outlet works, with a capacity of 805 cubic feet per second, consists of an intake structure at the right abutment, a concrete-lined tunnel, a gate chamber for two 2.25-foot-square high-pressure gates, a concrete tunnel, and stilling basin.

RegionFacilities in Upper Colorado | Upper Colorado Home Page
ProjectWeber Basin
Dam Type
ReservoirLost Creek
WatercourseLost Creek
Original Construction1963-1966
Modified Construction
National ID NumberUT10125
Hydrologic Unit Code

Structural Height248.4 ft
Hydraulic Height (Normal Operating Depth at Dam)180.0 ft
Top Parapet (Elevation)
Spillway Crest Elevation6005.0 ft
Crest Elevation6022.0 ft
Crest Length1078.0 ft
Crest Width
Base Width
Volume of Dam Construction Materials1,831,820 cu. yards
Streambed at Dam Axis5835.0 ft
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)
Top of Active Conservation Pool (Elevation)6005.0 ft
Top of Inactive Conservation Pool (Elevation)5912.3 ft
Top of Dead Storage Pool (Elevation)5842.0 ft

Hydraulics & Hydrology
Total Water Storage at Elevation
Maximum Water Surface Elevation6015.9 ft
Normal Water Surface Elevation
Spillway Type
Auxiliary SpillwayNo
Spillway Capacity at Elevation2455 cfs at 6015.9 ft
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation805 cfs at 6015.9 ft
Diversion Capacity at Elevation
Drainage Area123.0 sq mi
Hydrometeorological Report (HMR)HMR 49
Probable Maximum Flood (PMF) Report

Contact Information
TitleArea Office Manager
OrganizationProvo Area Office
Address302 East 1860 South
CityProvo, UT 84606-7317
Phone (Office)801 379-1101
OrganizationWeber Basin Water Conservancy District
Address2837 East Hwy 193
CityLayton, UT 84040
Phone (Office)801 771-1677


Last updated: Mar 05, 2009