Located at the base of the granite peaks of the Elkhorn Mountain Range in northeastern Oregon is the small town of Sumpter. Resting in a small pond at the edge of town is the largest and most accessible abandoned gold dredge in the country. From 1935 until 1954, this dredge worked the Sumpter Valley in a continuously moving pond of its own creation extracting nearly $4.5 million in gold and leaving 1,600 acres of tailings that are still visible along the Powder River. Today the Dredge is the centerpiece of the Sumpter Valley Dredge State Heritage Area and serves as an important link to Oregon's Pioneering past.
- Client: Oregon Parks & Recreation Department
- Construction Budget: undisclosed
- Use: State Park, museum
- Conservation Treatments:
* The complete replacement of the exterior decking.
* The complete replacement of the exterior guardrails.
* The complete replacement of the existing rolled asphalt roofing with a new thermoplastic polyolefin (TPO) membrane system.
* Environmentally sensitive project management, which limited construction staging and provided for protection of migratory birds which nest on the dredge in the late spring and early summer.