Puget Sound Sediment Deposition Analysis. Phase 1.
EVANS-HAMILTON INC SEATTLE WA
Pagination or Media Count:
By analyzing the organic enrichment and sediment grain sizes found in each of the five ZSFs 4Zones of Siting Feasibility selected for Phase I of the Puget Sound Dredge Disposal Analysis program, the depositional areas of lowest energy within those ZSFs were delineated. Major findings include 1 All five ZSFs contained areas of significantly elevated organics and small sediment grain sizes. 2 The preliminary sites within the ZSFs in Commencement Bay, inner Elliott Bay, Fourmile Rock, an Port Gardner contained high percentages of clay and organic elevated in excess of the 95 CI, indicating they were all areas of low current energy where fine sediments deposit naturally. 3 Nearly the entire ZSF in Saratoga Passage had levels of organics in excess of the 1.96 SND in addition to small grain size and high clay content. Therefore, the entire area is considered very depositional in nature. 4 The outer preliminary site within commencement Bay appears to be slightly more depositional than the inner preliminary site. 5 Although nearly all of Port Gardner appears to be a low energy area, the preliminary site in central Port Gardner appears more depositional than the site near the southern shoreline.
- Physical and Dynamic Oceanography
- Solid Wastes and Pollution and Control