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History of Dredge Upland Placement Sites and an examination of in-water resources of the Columbia River from river mile 3-106.5
Technical Exhibit 3
Project Area Information Dredge Placement Sites along the Columbia River between river miles 3-106.5
| Site Name |
| River Mile |
| Oregon/Washington Side of the River |
| Acreage |
| Harrington Point Sump |
| 21 |
| Oregon |
| Miller Sands |
| 23.5 |
| Oregon |
| 116.48 |
| Pillar Rock Island |
| 27.2 |
| Oregon |
| 51.60 |
| Skamokawa-Vista Park |
| 33.4 |
| Washington |
| 15.07 |
| Welch Island |
| 34 |
| Oregon |
| 40.65 |
| Tenasillahe Island |
| 38.3 |
| Oregon |
| 40.56 |
| James River |
| 42.9 |
| Oregon |
| 53 |
| Brown Island |
| 46.3 |
| Washington |
| 102.11 |
| Crims Island |
| 57 |
| Oregon |
| 58.82 |
| Hump Island |
| 59.7 |
| Washington |
| 64.58 |
| Lord Island (upstream) |
| 63.5 |
| Oregon |
| 50.9 |
| Dibblee Point |
| 64.8 |
| Oregon |
| 51.50 |
| Cottonwood Island |
| 70.1 |
| Washington |
| 62 |
| Sandy Island |
| 75.8 |
| Oregon |
| 31.85 |
| Lower Deer Island |
| 77 |
| Oregon |
| 24.31 |
| Martin Bar |
| 82 |
| Washington |
| 23.07 |
| Sand Island |
| 86.2 |
| Oregon |
| 28.30 |
| Austin Point |
| 86.5 |
| Washington |
| 29.51 |
| Gateway |
| 101 |
| Washington |
| 39.72 |
| W. Hayden Island |
| 105 |
| Oregon |
| 116.26 |
| Deep Water Site |
| See Map |
| Ocean ODMDS |
| 9000 |
| Webb Wildlife Mitigation Site |
| 47 |
| Oregon |
| Cottonwood Wildlife mitigation site |
| 70 |
| Washington |
| Chumbley Wildlife Mitigation site |
| 81 |
| Washington |
| Maintenance dredging of the main channel RM 3 to 106.5 including advanced maintenance width dredging up to 100 feet outside both channel edges |
| 3-106.5 |
| Oregon and Washington |
| N/A |
| In-water dredged material placement in Columbia River RM 3 to 106.5 deeper than -20 feet CRD |
| 3-106.5 |
| Oregon and Washington |
| N/A |
Map of Lower Columbia River Dredging and Placement Study Area image1.jpg
