Twin Harbors State Park: Grays Harbor County, WA

Facet provided pre-design phase services for the proposed campground project in Grays Harbor County. The existing park is built over a historic dune system which sees regular flooding during the wet season affecting two-thirds of the campsites and a State Park maintenance and administration facility. Improvements included the relocation of vulnerable campsites and facilities, requiring a new park entrance, connecting roadways, parking, and walking trails. Facet designed stormwater mitigation, sanitary sewer and water service, site layout, and temporary erosion and sediment control measures. The stormwater design considers treatment through the sustainable use of low-impact development design where feasible, in coordination with the wetland restoration efforts. Utility plans capture the design of sanitary sewer and water service for the proposed restrooms, cabins, and RV hook-ups. As part of the pre-design process, Facet evaluated potential stormwater and utility service options, and compared installation costs and maintenance costs/requirements for a range of solutions to help inform decisions about the most cost-effective and sustainable design elements.

Location:

Grays Harbor County, WA

Client:

Washington State Parks

Services Provided:

• Site Planning & Infrastructure Design

  • Relocation of vulnerable campsites and facilities, including a new park entrance, connecting roadways, parking, and walking trails

  • Design of stormwater mitigation, sanitary sewer and water service, and site layout

  • Development of temporary erosion and sediment control measures

• Sustainable Stormwater & Utility Planning

  • Stormwater design incorporating low-impact development strategies in coordination with wetland restoration efforts

  • Utility plans for sanitary sewer and water service, supporting proposed restrooms, cabins, and RV hook-ups

• Cost & Feasibility Analysis

  • Evaluation of potential stormwater and utility service options

  • Comparison of installation and maintenance costs to inform cost-effective and sustainable design decisions