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Building Strong® at Green Peter Dam and Reservoir

Green Peter Dam is located at river mile 5.5 on the Middle Santiam River, 11 miles northeast of Sweet Home, Ore.


Green Peter Dam is a concrete structure with a gated spillway that was completed with Foster Dam in 1968 at a cost of $82.3 million. Green Peter Dam has two hydropower generating units capable of producing a total of 80 megawatts.


Green Peter Dam works in coordination with Foster Dam for the purposes of flood risk management, hydropower, water quality improvement, irrigation, fish and wildlife habitat and recreation.

Link to larger version of Green Peter map graphic

For more information

Green Peter pamphlet

Contact us about Green Peter:
General: 541-684-4300
Recreation: 541-942-5631

Email us about Green Peter

Willamette Valley Project images

Green Peter hydropower

Generators / total output two 80 mw

Green Peter project data

Dam length 1,500 ft 457.2 m
Height 327 ft 141.1 m
Elevation (NGVD*) 941 ft 99.7 m
Lake length 10 mi 16.1 km
Area when full 3,720 ac 1,505.4 ha
*National Geodetic Vertical Datum

Green Peter recreation

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  • Thistle Creek Boat Ramp - year-round, low-water boat ramp
  • Whitcomb Creek Park - seasonal campground and boat ramp
  • Group Camping Area - Mile Post 16, Quartzville Road, near Trout Creek. $150 per night; call 541-967-3917 to reserve.
  • Boat-in Camping - Boaters may park overnight in the Whitcomb Creek County Park boat ramp parking lot; purchase a $7 permit.

For information about these parks, contact Linn County Parks at 541-967-3917

HOT INFO: Drought impacts on recreation and other missions

HOT INFO: Increased Willamette Valley fire restrictions


The Corps and Linn County Parks completed a plan in 2011 to improve the quality and safety of recreation at Green Peter Reservoir. The entire Green Peter Reservoir Recreation Plan is available here.

 Phase I of the plan includes expanding and improving Whitcomb Creek Campground, developing reserveable campsites at Trout Creek, and eliminating roadside camping on Corps land along Quartzville Road to Mile Post 17.2 just past Trout Creek.

Roadside camping has been permanently closed, effective April 1, 2014. Other improvements will be implemented as funding becomes available.

Green Peter map

Operations: Green Peter

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Restoring degraded uplands, wetlands and streams on Corps lands is a main focus of the Willamette Valley Environmental Stewardship program. Recent efforts to improve wildlife habitat on Corps’ lands here centered on replacing invasive plants with native trees and shrubs, and restoration of hydrology and topography to support native plant communities and wildlife habitat.


Osprey nest along the shorelines of the lake and are annually monitored. The Corps works with the Oregon Department of Fish and Wildlife to support resident game and nongame fisheries within the waters of the Middle Santiam River basin.

Conservation season: April to November: None.
Flood season: November to March: Restrict pool elevation to 1002 feet.

For more information, visit our Water page.