Deer Flat Middle Embankment


RegionFacilities in Pacific Northwest | Pacific Northwest Home Page
Dam Type Earthfill
ReservoirLake Lowell
WatercourseOffstream Storage
Location26 mi SW of Boise
Original Construction1906-1911
Modified Construction
National ID NumberID00277
Hydrologic Unit Code

Structural Height26.0 ft
Hydraulic Height (Normal Operating Depth at Dam) 12.7 ft
Top Parapet (Elevation)
Spillway Crest Elevation
Crest Elevation2536.0 ft
Crest Length750.0 ft
Crest Width
Base Width
Volume of Dam Construction Materials
Streambed at Dam Axis2523.3 ft
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)
Top of Active Conservation Pool (Elevation)2531.2 ft
Top of Inactive Conservation Pool (Elevation)2504.2 ft
Top of Dead Storage Pool (Elevation)2501.2 ft

Hydraulics & Hydrology
Total Water Storage at Elevation 173,000 ac-ft
Maximum Water Surface Elevation
Normal Water Surface Elevation2531.2 ft
Spillway Type
Auxiliary SpillwayNo
Spillway Capacity at Elevation
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation1,440 cfs
Diversion Capacity at Elevation
Drainage Area92.0 sq mi
Hydrometeorological Report (HMR)HMR 57
Probable Maximum Flood (PMF) Report

Contact Information
TitleArea Office Manager
OrganizationSnake River Area Office
Address230 Collins Road
CityBoise, ID 83702-4520
Phone (Fax)208 383-2275
Phone (Office)208 383-2248
OrganizationBoise Project Board of Control
Address2465 Overland Road
CityBoise, ID 83705-3155
Phone (Office)208 344-1141

Last updated: Dec 04, 2012