Pervious Concrete Parking Strips - Final Report

Pervious concrete parking strips were constructed adjacent to SR-203 through the urban core of Monroe, Washington. The parking strips were monitored over a period of four years to measure performance with respect to infiltration capacity, service life, and any possible negative effects on the adjacent lanes of SR-203. After four years of service, the pores in the pervious concrete parking strips are clogged with dirt and debris, which has greatly reduced their infiltration capacity. Attempts at cleaning the concrete were not completely successful. Fortunately, catch basins and infiltration pipes were installed under the pervious concrete as a backup for just this situation. Pervious concrete is not recommended for use on parking strips or shoulder adjacent to WSDOT roadways unless routine maintenance with adequate equipment is performed to prevent the pervious concrete from clogging. Additional evaluation is included regarding the performance of pervious concrete sidewalks and PaveDrain® block parking strips. Moss growth is a continuing maintenance problem on the sidewalks. The PaveDrain® blocks are performing as designed with no problems noted.

Publication Date: 
Tuesday, December 31, 2019
Publication Number: 
WA-RD 852.2
Last modified: 
03/17/2020 - 15:30
Keith W. Anderson, Mark Russell, Jeff S. Uhlmeyer, Jim Gardner
Washington State Department of Transportation. State Materials Laboratory.
Number of Pages: 
Porous pavements, Concrete pavements, Parking facilities, Infiltration, Drainage, Runoff, Environmental monitoring, Pavement performance, Evaluation and assessment.