Checking back on pervious pavement tests

The in basket: I recall visiting a Central Kitsap cul-de-sac around 2013 to hear about an experiment the county was doing there with pervious pavement, asphalt that lets rainwater seep in rather than run off. It was one of three such short streets in the county to get the pavement, and is part of the ongoing effort to handle runoff and its pollutants.

I asked how the experiment is going.

The out basket: Jacques Dean, county road superintendent, says, “So far, we have seen no problems with the application of pervious pavement.

“Keep in mind that all applications were done on low-volume roadways and it will take several years to fully evaluate them for effectiveness.  With that being said, the pavement surfaces appear to be holding up well to traffic loading and traffic turning movements for the short duration that they have been in service.

“We have observed some loose aggregate on the surface that has broken free of the mix, but this has been very localized.  We have mechanically swept each location at least 4 times each year since they were constructed to remove soils, pine needles and leaves.  “Clean Water Kitsap has continued to monitor surface water infiltration rates at each location and all appear to be draining well.  We will continue to monitor each location for pavement deterioration and infiltration rates over the next several years,” Jacques said.

“We have also applied ‘brick paver’ surfaces at several locations throughout the county (Byron Street, Point-no-Point parking lot, Forest Drive) and a pervious concrete surface parking lot (Silverdale YMCA) in the last couple of years.  Each of these locations is being monitored as well.”

 

2 thoughts on “Checking back on pervious pavement tests

  1. Hah! He should check out the pervious pavement on Pacific Ave. in Bremerton. It’s coming apart by the handfull. I was told by one of the staff engineers it was installed in a hurry before the funding dried up, like that was an excuse for shoddy workmanship.

  2. I agreed with Gary. Pacific Avenue pervious pavement is falling apart. It has shown not to hold up well with the normal oil drips from vehicles in the parking spaces. In addition, to allow proper water flow through it requires a higher frequency of street sweeper work.

    The brick pavers on Pacific have also been a pain for the city to keep in place without settling or coming loose.

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