Lower White River Countyline Levee Setback Project
The project is under construction. Two construction seasons (2016 and 2017) are needed to complete the project. Construction during the summer of 2016 included clearing portions of the project area, grading the site and installing engineered log structures. Time-lapse and flyover videos (YouTube) of the project site illustrate elements of the 2016 construction process.
The Countyline reach of the Lower White River is bounded by the A Street and Burlington Northern-Santa Fe (BNSF) Railway bridges at the upstream end (River Mile 6.33 ) and the 8th Street Bridge at the downstream end (RM 5.00). The Countyline reach spans the King-Pierce County boundary.
- Acquire all at-risk and necessary properties required to construct the project.
- Construct 6,000 lineal feet of new setback levee along the landward edge of a forested buffer to protect existing properties and structures.
- Construct 5,780 lineal feet of bio-engineered bank revetment along the existing wetland edge to protect existing properties and structures.
- Install engineered log structures in the existing wetland complex.
- Remove approximately 4,500 lineal feet of levee and bank armoring.
- Restore a forested riparian buffer (approximately 18 acres) adjacent to the wetland.
Click the below image to enlarge the project's draft conceptual design.
Significant flooding in January 2009 impacted more than 100 residences and numerous businesses in the City of Pacific and temporarily closed Stewart Road E due to overtopping by floodwaters east of the 8th Street Bridge. The goal of the Countyline Levee Setback project is to reduce flood elevations in the City of Pacific by removing the existing levee and reconnecting the river with 121 acres of off-channel aquatic habitat that has been isolated from the river for nearly a century. The Countyline Levee Setback project will provide significant flood risk reduction benefits for more than 200 residential properties. The proposed project is a combination of property acquisition, levee removal, setback levee construction, and floodplain restoration within the Countyline reach of the Lower White River in the cities of Pacific and Sumner.
Project costs and sponsors
The total project cost is estimated to be $20.8.
- $14.7 million - King County Flood Control District
- $823,000 - State Salmon Recovery Funding Board grant
- $500,000 - Pierce County funding
- $4.775 million - Natural Resource Damage Assessment participants
The King County River and Floodplain Management Section is overseeing the design and construction of this project, which is being implemented on behalf of the King County Flood Control District (external link).
Project milestones: Updated December 2016
|Completed environmental review process (SEPA)||Oct. 2012|
|Completed 60 percent design plans||May 2013|
|Completed property acquisitions||June 2015
|Completed final design||March 2016|
|Community Open House, Pacific City Gym||May 3, 2016|
|Start construction||June 2016|
|Finish earthwork construction and begin project site revegetation||Fall 2017|
|Project completion||Dec. 2017|
The project documents are available in Acrobat format.
- Determination of Non-Significance, Oct. 2012 (118 KB)
- SEPA Checklist, Oct. 2012 (223 KB)
- Lead agency determination letter, Sept. 2011 (539 KB)
- Decision to proceed, July 2013 (68 KB)
Project design documents
- Final design drawings, March 2016 (27 MB)
- Basis of Design Full Report, Feb. 2014 (98 MB) Or as individual documents below
- Basis of Design Report (33 MB) Main report without appendices.
- Appendix A – ELJ Concept Design Report, June 2011 (5.9 MB)
- Appendix B – Geomorphic Assessment, Dec. 2013 (3.6 MB)
- Appendix C – 8th Street E Bridge Scour Analysis, Aug. 2013 (0.3 MB)
- Appendix D – Hydraulic and Sediment Transport Modeling, May 2012 (5.5 MB)
- Appendix E – Final Hydraulic Modeling Results, Dec. 2012 (28 MB)
- Appendix F – Floodplain Geomorphic Surface Development Approach, May 2012 (0.7 MB)
- Appendix G – Hydraulic Modeling Approach – Initial Results, Oct. 2012 (5.6 MB)
- Appendix H – Geotechnical Analysis, Sept. 2013 (10.6 MB)
- Appendix I – ELS Design and Analysis, Feb. 2014 (16 MB)
- Appendix J – Countyline 60 Percent Design Drawings, May 2013 (17.6 MB)
- Countyline Wood Recruitment Study, Aug. 2011 (5.2 MB)
- Countyline Large Wood Safety Checklist, March 2011 (0.6 MB)
- Countyline Design (30 percent) Alternatives Analysis, Oct. 2012 (15.4 MB)
- Public Safety Management Plan Countyline Levee Setback Project, Jan. 2017 (5.8 MB)
Other information and external links
- White River Countyline Levee Setback Project Habitat Monitoring Plan - 2014 (13.8 MB)
- USGS Channel Capacity and Sediment Transport Report, 2010 (14.7 MB)
- USGS Geomorphic Analysis of the River Response to Sedimentation Downstream of Mount Rainier, Washington, 2012 (10.3 MB)
- Summary of Sediment Trends – Lower White River, 2010 (10.7 MB)
- Wetland Delineation Report, 2013 (3.8 MB)
- Draft Lower White River 2011 Sediment Monitoring Summary, 2012 (2.2 MB)
- Draft Evaluation of Sediment Removal in the Lower White River, 2012 (3.2 MB)
- King County Flood Control District (external link)
- Pierce County’s Lead Entity home page for WRIA 10/12 (external link)
- Pierce County Levee Setback Feasibility Study (external link)
- Salmon Habitat Limiting Factors for the Puyallup River Basin (WRIA 10)
- WRIA 10/12 Salmon Habitat Protection and Restoration Strategy (pdf, external link)
- Pierce County Flood Control Zone District (external link)
For more information about the White River, contact Jeanne Stypula, White River Basin Supervisor, King County River and Floodplain Management Section.