TagArmy Corp of Engineers(124)

Memo dated October 25, 2000 from Tom L. to Paula at Washington State Department of Ecology listing initial workload items for the next year. Items include updating Nationwide Permits with Army Corps of Engineers, developing Regional General Permits, investigating 401/CZM rule pros/cons, preparing for legislative session, coordinating on ESA issues, updating the 401/CZM Desk Manual,

Letter dated October 25, 2000 from Elizabeth Leavitt, Manager of Aviation Environmental Programs, Port of Seattle, to Jonathan Freedman, Regulatory Branch, U.S. Army Corps of Engineers Seattle District, submitting a new Joint Aquatic Resources Permit Application (JARPA) for Clean Water Act Section 404 permit, Corps of Engineers Project No. 96-4-02325, for Seattle-Tacoma International Airport Master

Email chain AR 018494 in which Erik Stockdale (Washington State Department of Ecology, ESTO461@ECY.WA.GOV) sends internal memo to Gail Terzi and Jonathan Freedman (Army Corps of Engineers) outlining status of the natural resource mitigation plan and associated documents for Sea-Tac Airport expansion. Stockdale notes the Port of Seattle is objecting to Ecology’s choice of consultant

Washington State Department of Ecology letter dated September 29, 2000, to Colonel Randall J. Butler (Army Corps of Engineers, Portland District) and Lee Daneker (EPA Aquatic Management Division) denying without prejudice a Section 401 Clean Water Act water quality certification for the Columbia River Channel Improvements project. The two proposed actions were: (1) deepening the

In a July 31, 2000 letter to the U.S. Army Corps of Engineers and Washington State Department of Ecology, Northwest Hydraulic Consultants — representing the Airport Communities Coalition — raised concerns about unresolved technical problems with the Stormwater Management Plan (SMP) for Seattle-Tacoma International Airport's proposed third runway. Independent reviews had identified serious flaws in hydrologic modeling that could result in undersized stormwater facilities failing to meet flow control requirements. The consultants urged regulators to publicly disclose ongoing SMP discussions and allow meaningful time for further review before approving the project.

In a July 31, 2000 letter to the U.S. Army Corps of Engineers and Washington State Department of Ecology, Northwest Hydraulic Consultants raised concerns about unresolved technical problems with the Stormwater Management Plan (SMP) for the proposed third runway at Seattle-Tacoma International Airport. Independent reviews had found serious flaws in the hydrologic modeling that could result in undersized facilities failing to meet flow control requirements. The firm requested full public disclosure of ongoing SMP discussions and a meaningful comment period before any regulatory approval of the runway project.

A June 2000 letter from Azous Environmental Sciences to the US Army Corps of Engineers raises concerns about the incorrect mapping of Wetland 44a near the proposed SR509 temporary interchange in SeaTac, Washington. A field review found that the wetland may be 20 to 40 feet closer to the construction zone than shown in project plans prepared by HNTB Corporation, potentially exposing it to significant sediment runoff during construction. The letter also highlights an overlooked creek system connecting Wetland 44a to Walker Creek and Miller Creek, warning that construction impacts could affect a broader network of wetlands and waterways.

A professional wetland scientist reviewed the construction plans for a temporary SR509 interchange near Seattle-Tacoma International Airport and concluded that the project would cause harmful sediment-laden stormwater runoff to discharge into nearby Wetland 43. The report found that the wetland boundary was significantly closer to the construction zone than project documents indicated, and that the steep slopes and sparse vegetation of the construction site made sediment runoff unavoidable. The scientist determined that the planned temporary erosion control measures were inadequate to protect the wetland, particularly during unexpected storm events.

A May 2000 environmental science review raised concerns that construction of a temporary highway interchange near Seattle-Tacoma International Airport's third runway would cause direct sediment runoff into the adjacent Wetland 43. The report found that the wetland boundary was up to 50 feet closer to the construction zone than project documents indicated, and that the steep slopes and inadequate erosion controls would fail to prevent sediment-laden stormwater from damaging the wetland's water quality and aquatic habitat.

Handwritten notes from a SeaTac internal meeting on 5-23-00 (AR 018449, Exhibit 180), attended by Jeannie, Ray H., Tom L., Joan M., John Glynn, Kevin P., and Paula Chlos. Topics include resolving conflicts between wildlife hazard plan and mitigation plan, sideboard definitions needed; need for ETA statement on conflict with circular and whether it meets