North Plains, OR Silica Mines
Silica Mines in North Plains, Oregon
| Mine | Owner | Land Status | Work Type | Minerals |
|---|---|---|---|---|
| Washington-Multnomah Area | Reynolds Metals Co. See Comment | Private | Surface | Silica |
| Mine | Owner | Land Status | Work Type | Minerals |
|---|---|---|---|---|
| Washington-Multnomah Area | Reynolds Metals Co. See Comment | Private | Surface | Silica |