Arthur V Watkins Dam


Flows that cannot be controlled by the mountain reservoirs, as well as winter releases through the powerplants, are diverted from Weber river at the Slaterville Diversion dam west of Ogden and carried eight miles north in the Willard Canal to Arthur V. Watkins Reservoir. The earth-lined canal has an initial capacity of 1,050 cubic feet per second. About five miles from the canal heading, a turnout diverts water into the Plain City Canal, a privately owned irrigation system.

Twelve miles northwest of Ogden on the shore of the Great Salt Lake, Arthur V. Watkins Dam is an offstream structure with a structural height of 36 feet. The dam is about 14.5 miles long in a rough rectangle, contains about 17 million cubic yards of material, and encloses a reservoir of 215,120 acre-foot capacity. Its siphon spillway has a capacity of 2,000 cubic feet per second. The 300-cubic-foot-per-second capacity outlet works functions only as a reservoir drain.

During the irrigation season, water can be pumped by Willard Pumping Plants No. 1 and No. 2 back through the Willard Canal from Arthur V. Watkins Reservoir to Slaterville Diversion Dam and on into the Layton Pumping Plant intake channel for irrigation of lands lying along the shores of Great Salt Lake.

RegionFacilities in Upper Colorado | Upper Colorado Home Page
ProjectWeber Basin
Dam Type
ReservoirWillard Bay
Watercourseoffstream Storage
Original Construction1957-1964
Modified Construction
National ID NumberUT10112
Hydrologic Unit Code

Structural Height36.0 ft
Hydraulic Height (Normal Operating Depth at Dam)27.8 ft
Top Parapet (Elevation)
Spillway Crest Elevation
Crest Elevation4235.0 ft
Crest Length76665.0 ft
Crest Width
Base Width
Volume of Dam Construction Materials
Streambed at Dam Axis4199.0 ft
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)
Top of Active Conservation Pool (Elevation)4226.0 ft
Top of Inactive Conservation Pool (Elevation)4205.0 ft
Top of Dead Storage Pool (Elevation)4205.0 ft

Hydraulics & Hydrology
Total Water Storage at Elevation
Maximum Water Surface Elevation 4226.0 ft
Normal Water Surface Elevation
Spillway Type
Auxiliary SpillwayNo
Spillway Capacity at Elevation2000 cfs at 0 ft
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation300 cfs at 4226.0 ft
Diversion Capacity at Elevation
Drainage Area16 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: Feb 20, 2009