Proposed Alternatives for the Lower Green River Corridor Flood Hazard Management Plan

The Lower Green River is susceptible to flooding and flood damage that affects people and residential, commercial, industrial, and agricultural properties along its banks. The potential impacts and damages of major flooding on people, structures, infrastructure, businesses, and jobs throughout the Lower Green River Valley are substantial. To address these issues, the King County Flood Control District (District) is preparing a Lower Green River Corridor Flood Hazard Management Plan (Plan) for approximately 21 river miles of the Lower Green River that flow through the cities of Auburn, Kent, Renton, Tukwila, and unincorporated King County. The goal of the Plan is to provide a long-term approach to reduce flood risk and improve fish habitat while supporting the economic prosperity of the region.

The District is seeking input from agencies, affected tribes and members of the public concerning three proposed alternatives for the Plan. You may comment on alternatives, probable significant adverse impacts, mitigation measures, and required permits or other approvals. Each of the alternatives includes continued maintenance of existing flood facilities. Alternatives 2 and 3 would also include some drainage improvements to agricultural lands and flood-proofing of agricultural structures.

Programmatic Environmental Impact Statement

The District is preparing a Programmatic Environmental Impact Statement (PEIS), which will analyze alternatives for flood protection that could be included in the Plan. The PEIS describes potential environmental impacts and measures to reduce or eliminate them. Because each alternative includes a variety of flood protection projects that make up a “program” of actions, a PEIS is being prepared. The PEIS will evaluate the potential impacts of the projects identified in each alternative.

Reference Materials:
Fact Sheet: English Version | Spanish Version
Determination of Significance/Scoping Notice: English Version | Spanish Version

the following alternatives are being evaluated in the Programmatic EIS:

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Alternative 1

The “No Action” Alternative.

Alternative 1 proposes to take no additional action and implement the 2018-2023 six-year capital improvement program (CIP) as adopted. This alternative is required under SEPA.

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Alternative 2

The “Moderate Geographic Extent of Increased Level of Protection” Alternative.

Alternative 2 proposes limited increase in the geographic extent of level of protection. Under this alternative the District would build approximately 20 miles of new or improved facilities.

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Alternative 3

The “Greater Geographic Extent with Increased Level of Protection, Integrated Habitat and Recreation, Agricultural Protection Facilities, and Habitat Restoration Project Partnerships” Alternative.

Alternative 3 proposes greater increase in the geographic extent of level of protection, integrated habitat and recreation, agricultural protection facilities, and habitat restoration project partnerships. Under this alternative the District would build approximately 30 miles of new or improved facilities.

Additional Scoping Information

Scoping
Agencies, affected tribes and members of the public are invited to comment on the scope of the PEIS. You may comment on alternatives, probable significant adverse impacts, mitigation measures, and required permits or other approvals.

Scoping Period
The scoping process begins on November 28, 2018, and closes April 1, 2019 at 5:00 pm.

Public Scoping Meeting
A public scoping meeting will be held in January to share information with members of the public and solicit feedback. Please join us on:

January 9, 2019
5:00 to 8:00 pm
Green River College Kent Campus

417 Ramsay Way, Room 283
Kent, WA 98032

There are several ways to provide Scoping Comments on the PEIS:

  1. Online. Visit our online town hall to submit comments online.

  2. By email. Electronic written comments may be submitted by email at lowergreensepa@kingcounty.gov

  3. In writing. Written comments may be mailed or hand delivered to the following address:
    King County Flood Control District
    Attn: Michelle Clark, SEPA Responsible Official
    516 Third Avenue, Room 1200
    Seattle, WA 98104

  4. In person. Comments may be submitted at the public scoping meeting on January 9, 2019, 5:00-8:00 pm:
    Green River College Kent Campus
    417 Ramsay Way, Room 283
    Kent, WA 98032