Mercer Island, WA Mines
Mines in Mercer Island, Washington
| Mine | Owner | Land Status | Work Type | Minerals |
|---|---|---|---|---|
| Riverton | Puget Sound Bridge And Dredging Co. | Stone, Crushed | ||
| Riverton Quarry | Lockheed Shipbuilding And Construction Co. | Sand and Gravel Stone, Crushed |
||
| Unnamed Pit | Sand and Gravel |