Emigrant Dam

Overview

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
RegionFacilities in Pacific Northwest | Pacific Northwest Home Page
StateOregon
CountyJackson
ProjectRogue River Basin
Dam TypeZoned Earthfill
Reservoir Emigrant Lake
WatercourseEmigrant Creek
Location
Longitude-122.605233
Latitude42.16206
Original Construction1924
Modified Construction1958-1961
National ID Number
Hydrologic Unit Code

Dimensions
Structural Height204.0 ft
Hydraulic Height (Normal Operating Depth at Dam)183.0 ft
Top Parapet (Elevation)
Spillway Crest Elevation2248.4 ft
Crest Elevation2254.00 ft
Crest Length4,750.0 ft
Crest Width
Base Width
Volume of Dam Construction Materials
Streambed at Dam Axis2058.0 ft
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)2241.0 ft
Top of Active Conservation Pool (Elevation)2241.0 ft
Top of Inactive Conservation Pool (Elevation)
Top of Dead Storage Pool (Elevation)2131.5 ft

Hydraulics & Hydrology
Total Water Storage at Elevation 39,000 ac-ft
Maximum Water Surface Elevation
Normal Water Surface Elevation2241.0 ft
Spillway Type Ungated overflow
Auxiliary SpillwayNo
Spillway Capacity at Elevation11,300.0 cfs at 2248.4 ft
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation 670 cfs flood release restriction
Diversion Capacity at Elevation
Drainage Area
Hydrometeorological Report (HMR)
Probable Maximum Flood (PMF) Report

Contact Information
Owner
TitleArea Office Manager
OrganizationColumbia-Cascades Area Office
Address1917 Marsh Road
CityYakima, WA 98901-2058
Phone (Fax)509 454-5611
Phone (Office)509 575-5848 x202
Operator
OrganizationTalent Irrigation District
AddressPO Box 467
CityTalent, OR 97540-0467
Phone (Office)541 535-1529


Last updated: May 17, 2012