OR00580 - Howard Prairie Dam


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Howard Prairie Dam


	Statistics

General

Region (Map) : .................. Pacific Northwest

State (Map) ....................... Oregon

County ............................... NA

Project: ............................... Rogue River Basin

Dam type: .......................... Earthfill

Location: ........................... 18 mi E of Ashland

Watercourse: .................... Beaver Creek

Reservoir: .......................... Howard Prairie

Construction Date: .......... 1957-1958

National ID Number ........ OR00580

Hydrologic Unit Code ...

Dimensions

Crest Elevation of Dam: .................... 4539.0 ft

Structural Height of Dam: ................... 100.0 ft

Crest Length: ...................................... 1040.0 ft

Top of Joint Use: ........................................ NA

Top of Active Conservation: ........... 4526.6 ft

Top of Inactive Conservation: .................. NA

Spillway Crest: .................................... 4539.0 ft

Top of Dead Storage: ........................ 4471.0 ft

Streambed at Dam Axis : ................... 4451.0 ft

Hydraulics

Normal Water Surface Elev: ............... 4533.4 ft

Hydraulic Height: .................................... 88.0 ft

Service Spillway Type:

Uncontrolled Crest ................................ Yes

Morning-Glory ............................................ No

Crest Length ....................................... 25.0 ft

Gated ....................................................... No

Capacity at Elev: 4539.0 ft, ..............1,600 cfs

Auxiliary Spillway ......................................... No

Capacity at Elev. ..................................... NA

Outlet Works Capacity at

Elevation 4495.5 ft., ............................ 60 cfs

Hydrology

Drainage Area: ................................. sq mi

Hydrometeorological Report HMR x

Flood Type: ...............................General

Storm Duration: ....................................... hrs

Probable Maximum Flood (PMF) Report:

Peak Inflow: .................................. cfs

Inflow Volume: ........................ acre-ft

Flow Duration: ......................................0 days

PMF Routing MWS Elev.: ................. x.0 ft

Initial Routing Elev: ............................ x.0 ft

Study Date:

Power Generation

Power Generation at Dam Site - None

Bureau of Reclamation Power Program

Narration

Geology

The damsite geology consists of hard fresh medium grained basalt, about 29 feet thick, underlies the relative thin mantel of sandy topsoil. Unconformably underlying the basalt are lacustrine and aeolian deposits. On the left abutment, this deposit is a tuff breccia about 30 feet thick; on the right abutment these deposits consist of claystones, siltstones and diatomite as tuff and tuff breccia.

Links

| Recreation |

| Dams Located by State | USBR Oregon Dams | Pacific Northwest Region Dams |

| Owner: Bureau of Reclamation, Lower Columbia Area Office, 1201 NE Lloyd Boulevard Suite 750, Portland, OR 97232-1295, Phone: 503-872-2795, Fax: 503-872-2797

| Operator: Talent Irrigation District,
PO Box 467, Talent, OR 97540-0467, (541) 535-1529