2018-19 Greenbank Marsh Restoration Design (Phase 2)
This page will be updated periodically as new information becomes available.
Greenbank Beach and Boat Club (GBBC), with the support of Whidbey Island Conservation District (WICD), has received a grant from the Washington State Recreation and Conservation Office (RCO) to fund the second phase of a multi-phased project to address GBBC's privately owned, aging tidegate system. This second phase follows the Greenbank Marsh Restoration Issues Assessment (Phase I) which was completed in November 2017. See 2016-2017 Greenbank Marsh Restoration Issues Assessment (Phase 1) or Greenbank Marsh Project Overview pages for more information regarding work leading up to Phase 2 - Restoration Design.
The goal of this second phase is to refine the conceptual "open channel" designs from Phase I into “permit-ready” designs for the subsequent construction phase. The scope of work includes completing 90% engineered designs, applying for construction permits, and continuing stakeholder outreach and consultation.
- GBBC received the grant from RCO. GBBC is contracting with WICD to handle financial and reporting tasks, oversight of technical consultants, and design/permitting tasks.
- GBBC has sole responsibility for all decisions regarding expenditure of the grant monies.
Scope of Work
- Stakeholder outreach and consultation
- Engineering Design technical analyses to be completed by consultants:
- Channel outlet design and verification of tidal conditions (based on coastal geomorphic and H&H data)
- Refine hydraulic modeling to further evaluate potential for flooding in marsh
- Geotechnical investigation and dike design
- Biological issues assessment
- Engineering design and drawings, including additional field studies
- Permit applications (including pre-application meeting with Island Co)
- Develop funding opportunities and apply for construction funding
- Start date: 1/19/18
- Stakeholder outreach: throughout grant period
- Field studies, including water level and salinity baseline monitoring: begin March 2018
- Publish RFP for engineering consultants and hire consultants: July 2018
- 90% design complete: July 2019
- Draft permit applications complete: July 2019
- End date: 7/19/19
The design phase grant application can be viewed on RCO’s Project Information System (PRISM) website at the following link https://secure.rco.wa.gov/prism/search/ProjectSnapshot.aspx?ProjectNumber=17-1140.