Stormwater design considerations include ecological, practical, and economic factors. Ecologically, designs should mimic natural systems for improved function. Practically, hydraulic aspects like required storage depth are important. Economically, infiltration under pavement at Snoqualmie Point Community Park and Brickyard Park and Ride Lot provided cost savings through reduced construction time and full water quality treatment.

1. Stormwater Design Considerations By Amie Broadsword, PE and Chris Rhinehart, PE

6. Detention storage in arch-pipe system under pavement with discharge to downstream biofiltration swale for WQ Treatment

7. Arch pipe detention system section

10. Amie Broadsword, PE [email_address] Chris Rhinehart, PE [email_address] PACE Engineers www.paceengrs.com 206-441-1855