Newton Dam

Newton Dam is an earthfill structure on Clarkston Creek approximately 2 miles north of Newton. It is 101 feet high and has a volume of 410,000 cubic yards. The reservoir has a capacity of 5,600 acre-feet. The service spillway is controlled by a radial gate. An emergency spillway with an uncontrolled crest 1,000 feet long is located near the west end of the dam. A horseshoe conduit, 4 feet in diameter, controlled by a slide gate, serves as outlet works.


Newton Dam is located in the Cache Valley, a Late Tertiary (Neogene) graben along the eastern margin of the Basin and Range Province.  The valley was occupied by an arm of Lake Bonneville in Quaternary times.  The dam and appurtenant structures are founded in surficial sediments deposited in the ancient lake.

RegionFacilities in Upper Colorado | Upper Colorado Home Page
Dam TypeZoned Earthfill
WatercourseClarkson Creek
Location1 Mile East of Newton, Utah
Original Construction1941-1946
Modified Construction
National ID NumberUT10129
Hydrologic Unit Code

Structural Height101.0 ft
Hydraulic Height (Normal Operating Depth at Dam)74.5 ft
Top Parapet (Elevation)
Spillway Crest Elevation4775.9 ft
Crest Elevation4781.0 ft
Crest Length3340.0 ft
Crest Width
Base Width
Volume of Dam Construction Materials410,000 cu yrds
Streambed at Dam Axis4700.0 ft
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)
Top of Active Conservation Pool (Elevation)
Top of Inactive Conservation Pool (Elevation)4725.0 ft
Top of Dead Storage Pool (Elevation)4725.0 ft

Hydraulics & Hydrology
Total Water Storage at Elevation
Maximum Water Surface Elevation47745 ft.
Normal Water Surface Elevation
Spillway Type
Auxiliary SpillwayNo
Spillway Capacity at Elevation1260.0 cfs at 4776.7 ft
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation240 cfs at 4774.5 ft
Diversion Capacity at Elevation
Drainage Area56.0 sq mi
Hydrometeorological Report (HMR)
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
OrganizationNewton Water Users Association
Address5397 West 7200 North
CityNewton, UT 84327
Phone (Office)435 563-5667

Last updated: Mar 26, 2009