Deadwood Dam

Overview

Deadwood Dam is located in west-central Idaho on the Deadwood River about 25 miles above its confluence with the South Fork of the Payette River and about 90 miles above Black Canyon Diversion Dam. The damsite is located in a narrow canyon where the Deadwood River has cut into granite bedrock, approximately 53 miles northeast of Boise, Idaho. The dam lies on the western slope of the Sawtooth Mountains with elevations in the basin varying from 5311 feet by the dam to about 8,696 feet at Price Peak. Deadwood Reservoir is three and one half miles long and covers 3,180 acres. Deadwood Dam is a concrete-arch structure with a structural height of 165 feet and a total capacity of 154,000 acre-feet, providing a regulated flow for the powerplant at Black Canyon Diversion Dam and for irrigation in the Payette Division and Emmett Irrigation District.

Geology

Foundation: Hard, sound granite, massive at left abutment and fissured with sheet and block joints at right abutment. Two tightly filled fault-zone seams cross foundation on right side.


General
RegionFacilities in Pacific Northwest | Pacific Northwest Home Page
StateIdaho
CountyValley
ProjectBoise
Dam Type Concrete Arch
ReservoirDeadwood
WatercourseDeadwood River
Location25 mi SE of Cascade, ID
Longitude-115.6459458
Latitude44.2932322
Original Construction1929-1931
Modified Construction
Hydrologic Unit Code
National ID NumberID00284

Dimensions
Structural Height165.0 ft
Hydraulic Height (Normal Operating Depth at Dam)137.0 ft
Top Parapet (Elevation)5343.5 ft
Spillway Crest Elevation 5334.0 ft
Crest Elevation5340.0 ft
Crest Length749.0 ft
Crest Width9 ft
Base Width62 ft
Volume of Dam Construction Materials56,400 cu yd
Streambed at Dam Axis
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)
Top of Active Conservation Pool (Elevation) 5334.0 ft
Top of Inactive Conservation Pool (Elevation)
Top of Dead Storage Pool (Elevation)

Hydraulics & Hydrology
Total Water Storage at Elevation154,000 ac-ft at 5334.0 ft
Maximum Water Surface Elevation5345.52 ft
Normal Water Surface Elevation 5334.0 ft
Spillway Type Uncontrolled overflow section near center of the dam
Auxiliary Spillway
Spillway Capacity at Elevation11,300 cfs at 5343.5 ft
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation2,600 cfs at 5334.0 ft
Diversion Capacity at Elevation
Drainage Area110.7 sq mi
Hydrometeorological Report (HMR)HMR 57

Contact Information
Owner
TitleArea Office Manager
OrganizationSnake River Area Office
Address230 Collins Road
CityBoise, ID 83702-4520
Phone (Fax)208 383-2275
Phone (Office)208 383-2248
Operator
TitleArea Office Manager
OrganizationSnake River Area Office
Address230 Collins Road
CityBoise, ID 83702-4520
Phone (Fax)208 383-2275
Phone (Office)208 383-2248


Last updated: Jun 21, 2012