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The Belmondo Revetment Enhancement Project was completed in 2013. It consisted of reconstructing 370 linear feet of existing streambank revetment on the left bank of the Cedar River with vegetated geogrids and four streambank enhancement structures.

The primary purpose of the project was to continue and complete the bank stabilization and flood control work that was initiated during an emergency repair in January 2009 due to flooding. The secondary purpose of the project is to provide mitigation for impacts to aquatic habitat associated with the Cedar Rapids Levee Setback Repair project.

In 2012 maintenance work was performed to rebuild 100 lineal feet of eroding revetment at the north end of the project site. A new rock toe and vegetated geogrids were constructed.

The project enhanced the quantity and quality of aquatic habitat and is consistent with state and county standards for streambank stabilization projects. The instream structures incorporate the use of boulders, large wood and rock ballasting to trap sediment, scour pools, create fish refugia, and establish riparian shade and cover.

The project site is the Belmondo Reach of the Lower Cedar River, which extends from RM 9.4 to 10.8. The project site is located four miles southeast of Renton and four miles north of Maple Valley just east of SR-169 (Renton-Maple Valley Road) on the east side of the Cedar River Trail.

An image of construction at the Belmondo site on the Cedar River.
Image of preparing vegetated geogrids at the Belmondo site on the Cedar River.
Aerial image of the in-water construction at the Belmondo site on the Cedar River.
Image of the Belmondo project completed.


  • July 2013
    • Close Cedar River Regional Trail between 201st Pl SE and 16916 Renton-Maple Valley Hwy.
    • July 1 - August 31, 2013 – In-water work; restricted river access and potential reach closure.
    • Contractor comments construction
  • August 2013
    • Construction
  • September
    • River access restriction lifted
    • Cedar River Regional Trail reopens
  • October-December 2013 – Floodplain planting

Download documents:

Environmental review (SEPA) documents are provided in Adobe Acrobat format. For help using this format, please see our software help page.

For questions or comments about the Belmondo Revetment Enhancement Project, please contact Mason Bowles, Project Manager, Ecological Restoration and Engineering Services Unit.