Clean Water Services, with assistance from SOLV and Tualatin Hills Park and Recreation District (THPRD),
conducted a stream enhancement project on Johnson Creek South at Summercrest Park.
The site is located just below the pond east of 170th Avenue to a point just below 165th Avenue in unincorporated
Washington County.
The site encompasses approximately 1,200 linear feet or three acres.
The purpose of this enhancement was to address two undersized pipe culverts that restrict flow during rain events
and present obstacles for fish passage, bank instability, and channel downcutting.
The channel downcutting was a result of stormwater flows.
Residential development and invasive plant species have further degraded the riparian forest and left large stretches
of stream without shade during the summer months.
The project replaced the undersized pipe culverts with fish passable pedestrian bridges, removed non-native,
invasive plants, stabilized degraded banks, added woody debris to enhance fish habitat
and revegetated the site with native trees and shrubs.
Schedule and budget
Culvert replacement, grading, bioengineering, and repairs to the footpaths were performed by Clean Water Services
Field Operations during September 2003.
Invasive plant removal and re-vegetation with native plants was carried out by Clean Water Services and volunteers
coordinated by SOLV between September 2003 and April 2004.
Site maintenance by Clean Water Services is ongoing.
The final project cost is anticipated to be $90,000.
Contact information
Peter Guillozet, Water Resources Project Coordinator,
(503) 681-4470 or guillozetp@cleanwaterservices.org
Kendra Smith, Water Resources Program Manager,
(503) 681-4425 or smithk@cleanwaterservices.org