Lid Stormwater Approach: Overcoming Barriers to Implementation
- 1. LOW IMPACT DEVELOPMENT STORMWATER APPROACHOvercoming Barriers to Implementation
- 2. Brickyard Park and RideMay 2009 June 2010Project is a 200 stall expansion of an existing King County Metro Park and Ride lot located in unincorporated King County.
- 3. Stormwater Management ApproachPervious asphalt pavement with distributed detention storage in shallow arch-pipe system. Biofiltration swale for WQ treatment.n
- 5. Brickyard: Drainage SectionArch pipe detention system section
- 6. 60% Design Cost ComparisonCost Savings = $88,000 or 3.8% of Construction CostCost Assumptions:Subtract 8 CBs and 630 LF of 12-inch pipeDecrease detention storage by about ½ or 16,000 cubic feetDecrease earthwork cut and haul (due to less detention storage)Add washed crushed base course material
- 7. Construction
- 8. Paving Day – August 28, 2009
- 10. When Something Goes Wrong
- 11. Repairs
- 12. Common Barriers to Use of LID UnfamiliarityDesign team, permitting agency, owner, contractor, etc.Do you have public support for your ROW project? Site limitations (soils, slopes, high groundwater, etc.)Cost (perceived and/or real)Local code limitations Risk/Liability (both to owner and design team)
- 13. Risk MitigationTake Advantage of Continuing Professional EducationLID Certification Classes are offered locallyWebinars – Contract Language/Risk ManagementAttend Professional Conferences – ASCE International Conference on LIDStart Small to Build Confidence and ExperienceSeek Highly Collaborative Project TeamsLID methods require an understanding of natural systems that include the surrounding ecology, soil, and plant communities. This requires close collaboration of people across disciplines (architect, civil, geotech, landscape architect, environmental scientist, etc.) Partner with suppliers and builders early in design to increase success
- 14. Amie Broadsword, PE, LEED APamieb@paceengrs.com425-827-2014A Special Thank You to Today’s Sponsors!
Editor's Notes
- #8: Compaction was a major concern over the entire lot. Contractor was instructed to keep 1-ft minimum of soil above final grading until ready to install detention and pavement in order to preserve infiltrative capacity of underlying soils.