Lower Columbia River Field Guide to Water Quality Friendly Development
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Reduced Impervious Surfaces

Narrow or shared driveway
Narrow parking lot spaces
Narrow travel lanes


Permeable Surfaces

Permeable pavement
Permeable pavers
Turf block
Gravel
Cobbles

Roof Systems
Ecoroof
Roof garden

Rainwater Harvesting Systems
Rainn Barrels
Cisterns

Landscape Systems
Trees
Contained planter box
Infiltration planter box
Flow-through planter box
Vegetated/grassy swale
Vegetated filter strip
Vegetated infiltration basin
Sand filter


Subsurface Systems

Soakage trench/dry wells/French drain

Conveyance
Downspout disconnection
Curb alternatives


   

Permeable Pavement

Site:
Sidewalk Across Street from Hockinson Heights Elementary School
Owner:
Clark County
Address:
Across street from
20000 NE 164th Street
Brush Prairie, WA 98606
Contact:
Don Andrews
360.397.6118

 

Comments:
An experimental sidewalk by Clark County. The County saved $35,000 by opting for porous concrete over installation of a storm drain. The concrete will let four inches of water pass through each minute.


Site:
North Gay Avenue
Owner:
City of Portland
Address:
North Gay Avenue
Portland, OR
Contact:
Steve Fancher
503.823.7740

 

Comments:
The City of Portland is experimenting with four different pervious paving options along a four-block portion of North Gay Street. The options include porous concrete along a full block, porous concrete in the parking lanes only, porous asphalt on a full block, and porous asphalt on parking lanes only.



Site:
The Lakeside Gardens
Owner:
Lakeside Gardens
Address:
16211 SE Foster Road
Portland, OR 97236
Contact:
503.760.6044

 

Comments:
When the owners of The Lakeside Gardens re-landscaped their entryway, they included permeable pavement on the driveway into the garden to lessen the stormwater runoff to the sensitive habitat areas below.


Site:
Jean Vollum Natural Capital Center
(Ecotrust Building)
Owner:
Ecotrust
Address:
Address: 721 NW 9th Avenue
Portland, OR 97209
Contact:
Sydney Mead
503.227.6225

 

Comments:
As part of their gold-level Leadership in Energy and Environmental Design (LEED) award from the US Green Building Council, Ecotrust used permeable asphalt in addition to bioswales in their parking lot stormwater management system.

 


Site:
Springwater on the Willamette Trail
Owner:
Portland Parks Bureau
Address:
From SE Fourth and Ivon three miles south along the east side of the Willamette River.
Portland, OR
Contact:
Gregg Everheart
503.823.7529

 

Comments:
Porous asphalt was a natural choice for the Springwater on the Willamette trail because of its close proximity to the Willamette River. Porous asphalt will minimize stormwater runoff created by the new trail.