(Deshayes, 1839)
Washington Butterclam
| Province | Rank | Native |
|---|---|---|
| Washington | SNR | Yes |
| Area | Forest | Acres |
|---|---|---|
| Castle | Tongass National Forest | 49,289 |
| Chichagof | Tongass National Forest | 555,858 |
| Chugach-12 | Chugach National Forest | 8,116 |
| Chugach-13 | Chugach National Forest | 13,337 |
| Cleveland | Tongass National Forest | 189,447 |
| College Fiord | Chugach National Forest | 1,130,818 |
| Eudora | Tongass National Forest | 195,022 |
| Fanshaw | Tongass National Forest | 48,248 |
| Freshwater Bay | Tongass National Forest | 44,933 |
| Game Creek | Tongass National Forest | 54,469 |
| Hoonah Sound | Tongass National Forest | 79,764 |
| Juneau Urban | Tongass National Forest | 101,581 |
| Juneau-Skagway Icefield | Tongass National Forest | 1,187,268 |
| Karta | Tongass National Forest | 52,117 |
| Keku | Tongass National Forest | 10,869 |
| Kogish | Tongass National Forest | 65,216 |
| Madan | Tongass National Forest | 68,553 |
| Mansfield Peninsula | Tongass National Forest | 54,991 |
| Nellie Juan | Chugach National Forest | 713,697 |
| North Baranof | Tongass National Forest | 314,089 |
| North Kruzof | Tongass National Forest | 33,146 |
| North Kupreanof | Tongass National Forest | 114,660 |
| North Wrangell | Tongass National Forest | 8,091 |
| Outer Islands | Tongass National Forest | 99,862 |
| Pavlof-East Point | Tongass National Forest | 5,399 |
| Port Alexander | Tongass National Forest | 120,681 |
| Redoubt | Tongass National Forest | 68,347 |
| Sitka Sound | Tongass National Forest | 13,459 |
| Sitka Urban | Tongass National Forest | 112,003 |
| South Kruzof | Tongass National Forest | 55,193 |
| South Kupreanof | Tongass National Forest | 216,816 |
| Twenty Mile | Chugach National Forest | 198,775 |
| Upper Situk | Tongass National Forest | 16,789 |
| Windham-Port Houghton | Tongass National Forest | 161,952 |
| Yakutat Forelands | Tongass National Forest | 323,648 |
| Area | Forest | Acres |
|---|---|---|
| Tahkenitch | Siuslaw National Forest | 5,799 |