Emigrant Dam and Lake, located 7.5 miles southeast of Ashland, Oregon, on Emigrant Creek, was constructed by the Talent Irrigation District for irrigation water supply. The original 110-foot-high thin-arch concrete dam was incorporated into a 204-foot-high earthfill structure with enlargement by the Bureau of Reclamation in 1961. The dam is 204 feet high and has a crest elevation of 750 feet. The reservoir’s total capacity is 40,500 acre-feet (active 39,000 acre-feet). The enlarged reservoir reregulates Green Springs Powerplant discharges and provides additional storage for irrigation.
Geology
Most of the rock layers consist of medium to fine-grained sandstone, but layers and lenses of siltstone, claystone, conglomerate and coal are present throughout the series. Into these sediments many irregular sills and dikes of diorite, andesite and felsite have been intruded. The color of the rocks range from light gray to black, most layers are reddish to yellowish brown.
General
Project
Rogue River Basin
Dam Type
Zoned Earthfill
Longitude
-122.605233
Watercourse
Emigrant Creek
Reservoir
Emigrant Lake
Original Construction
1924
Modified Construction
1958-1961
Latitude
42.16206
Dimensions
Crest Elevation
2254.00 ft
Structural Height
204.0 ft
Hydraulic Height (Normal Operating Depth at Dam)
183.0 ft
Crest Length
4,750.0 ft
Top of Joint Use Pool (Elevation)
2241.0 ft
Top of Active Conservation Pool (Elevation)
2241.0 ft
Top of Dead Storage Pool (Elevation)
2131.5 ft
Streambed at Dam Axis
2058.0 ft
Spillway Crest Elevation
2248.4 ft
Hydraulics & Hydrology
Normal Water Surface Elevation
2241.0 ft
Spillway Type
Ungated overflow
Auxiliary Spillway
No
Total Water Storage at Elevation
39,000 ac-ft
Outlet Works Capacity at Elevation
670 cfs flood release restriction
Spillway Capacity at Elevation
11,300.0 cfs at 2248.4 ft
Contact
Owner
Title: Area Office Manager Organization: Columbia-Cascades Area Office Address: 1917 Marsh Road City: Yakima, WA 98901-2058 Fax: 509-454-5611 Phone: 509-573-8000
Operator
Organization: Talent Irrigation District Address: PO Box 467 City: Talent, OR 97540-0467 Phone: 541-535-1529
More Information about the U.S. Bureau of Reclamation