TagThird Runway(1067)

Second Pre-Hearing Order issued by the Pollution Control Hearings Board (PCHB) in case PCHB No. 01-160, Airport Communities Coalition (ACC) v. State of Washington Department of Ecology and Port Of Seattle. Accepts 21 stipulated legal issues and adds issue 22 regarding Ecology’s reasonable assurance under §401 and applicable water quality laws concerning a stormwater detention

Port Of Seattle letter dated November 16, 2001 from Elizabeth Leavitt, Manager of Aviation Environmental Programs, to Ann Kenny at the Washington Department of Ecology Northwest Regional Office, transmitting the Third Runway Embankment Seepage and Groundwater Monitoring Plan in satisfaction of § 401 Water Quality Certification Order #1998-4-02325, Condition E.3. The plan, AR 052417–052419, covers

In November 2001, the Port of Seattle submitted a Third Runway Embankment Seepage and Groundwater Monitoring Plan to the Washington Department of Ecology as required by a § 401 Water Quality Certification order. The plan was designed to detect any impacts of the runway fill embankment on nearby receiving waters and groundwater, both during and after fill placement. The Port requested written approval of the plan from the Department of Ecology's Northwest Regional Office.

ACC (Airport Communities Coalition) motion filed with the Pollution Control Hearings Board (PCHB No. 01-160) seeking to supplement the evidentiary record on its motion for stay of the Section 401 Certification issued by Ecology on September 21, 2001, for the Third Runway Project at Sea-Tac Airport. Documents obtained via public records request to Ecology on

Declaration by Andrea Grad, paralegal at Helsell Fetterman LLP representing Airport Communities Coalition (ACC), filed November 16, 2001, in PCHB Case No. 01-160. Describes Public Disclosure Act request submitted November 5, 2001 to Ecology’s Northwest Regional Office (NWRO), resulting in receipt of 651 pages of documents. Attaches Exhibits A-D: (A) October 24, 2001 letter from

Port Of Seattle’s objections filed November 15, 2001 to three issues proposed by Airport Communities Coalition (ACC) in Pollution Control Hearings Board (PCHB) Case No. 01-160, concerning §401 certification for the Third Runway project. Objects to ACC Proposed Issues 11, 18, and 19: Issue 11 concerns dam safety permit requirements under WAC 173-175 and reasonable

Supplemental Stipulation filed in PCHB No. 01-160, Airport Communities Coalition (ACC) v. State of Washington Department of Ecology and Port Of Seattle. Filed November 15, 2001, received by the Pollution Control Hearings Board November 16, 2001. Documents 21 agreed proposed legal issues for the Board’s consideration, covering Clean Water Act Section 401 certification for the

This document presents site features and cross-sectional diagrams used for Hydrus-Slice hydrological modeling of the Sea-Tac Third Runway Embankment Fill project. It shows fill depths ranging from 0 to 160 feet across multiple modeled slices, with cross sections identifying impervious areas, elevation contours, and the watershed divide between Miller Creek and Walker Creek. The figures were produced in November 2001 as part of environmental engineering analysis for the third runway construction.

This November 2001 legal filing lists the witnesses that the Airport Communities Coalition (ACC) planned to call at a Pollution Control Hearings Board proceeding against the Washington State Department of Ecology and the Port of Seattle. The witness list includes personnel from the Department of Ecology and Port of Seattle, outside consultants such as Parametrix and Shannon & Wilson, and ACC's own expert witnesses covering environmental, hydraulic, and biological topics. The case, filed under PCHB Nos. 01-133 and 01-150, centered on a water quality certification related to Sea-Tac Airport.

A 2001 technical memo from Hydrocomp, Inc.'s Norm Crawford outlines recommendations for hydrological modeling of Miller, Walker, and Des Moines Creeks near Sea-Tac Airport's new runways and taxiways. The document describes how surface runoff and groundwater flow from both impervious runway surfaces and surrounding pervious grasslands should be calculated and linked across three modeling tools: HSPF, Hydrus, and the Slice model. Key recommendations include properly accounting for infiltration, reducing till seepage by 33% for inactive groundwater recharge, and reconciling discrepancies in land area calculations between the different models.