Royal Arch Reach Protection

Salmonid Habitat Restoration and Acquisition

Land or Easement Acquisition
Project ID17-1040 A
Recovery DomainsPuget Sound
Start Date01/19/2018
End Date12/03/2018
Last Edited04/19/2022
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Seattle Public Utilities acquired two target parcels along the Cedar River in King County, totaling 11.88 acres of riparian and floodplain habitat with a combined 1580 feet of streambank, located at approximately River Mile 14.5 near the intersection of Highway 169 and Highway 18 in Maple Valley. The near term project goal is to protect and restore riparian habitat. Residential structures were demolished, and invasive plants were removed. Native riparian trees and shrubs were planted using other funding. The long term project goal is to secure land necessary to enable a floodplain restoration project along the Royal Arch Reach by removing bank hardening structures such as levees and revetments, and reconnecting the wide, low gradient floodplain to the Cedar River to provide important rearing and refuge habitat to benefit Chinook salmon, as well as Puget Sound coho and Steelhead.To date Seattle Public Utilities has acquired a total of 26.3 acres in this reach, with approximately 37 acres remaining to be acquired to enable an approximately 63-acre floodplain restoration project.

Project Benefit    

The primary goal of this project is to acquire land in a Tier 1 area that is necessary to enable a future restoration project. The ultimate intent would be to increase survival of juvenile Chinook in the Cedar River by restoring access to low-gradient, low velocity rearing and refuge habitat that has been disconnected from the mainstem as a result of channelization and construction of bank hardening structures such as levees and revetments


Metric Completed Originally
Land Acquisition
  Acres Acquired or Protected 11.9 18.1
  Stream Bank Miles Acquired
  or Protected
.29 .29

Funding Details

Report Total:$1,739,357

Project Map


1-Royal Arch Reach    

  • Worksite Identifier: 1-Royal Arch Reach
  • Start Date:
  • End Date:
Area Description

No Area Description data was found for this worksite.

Location Information

  • Basin: Puget Sound
  • Subbasin:
  • Watershed:
  • Subwatershed:
  • State: Washington
  • Recovery Domain: Puget Sound
  • Latitude: 47.40986548
  • Longitude: -122.04600726


  • Puget Sound/Strait of Georgia Coho Salmon ESU
  • Puget Sound Steelhead DPS
  • Puget Sound Chinook Salmon ESU




  • C.0 Salmonid Habitat Restoration and AcquisitionY (Y/N)
    •      . . C.0.a Habitat restoration and acquisition funding 1,739,357.00
    •      . . C.0.b Length of stream treated/protected .30
    •      . . C.0.c
      Project identified in a Plan or Watershed Assessment
    •      . . C.0.d.1 Project Monitoring (LOV)
    •      . . C.0.d.2 Monitoring Location (LOV)
    •      . . C.10 Land or Easement AcquisitionY (Y/N)
      •      . . . . C.10.a Land acquisition funding 1,739,356.57
      •      . . . . C.10.b Habitat treatments applied (LOV)
      •      . . . . C.10.c.1 Acquisition or lease of land, wetland or estuarine area for conservationY (Y/N)
        •      . . . . . . C.10.c.2 Type of acquisition to protect habitat (LOV)
        •      . . . . . . C.10.c.3 Type of property protected (LOV)
        •      . . . . . . C.10.c.4 Date of expiration of protection12/31/9999 (mm/dd/yyyy)
        •      . . . . . . C.10.c.5 Miles of streambank protected by land or easement acquisition .29
        •      . . . . . . C.10.c.6 Acres of land, wetland or estuarine area acquired 11.9