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Maintaining Stormwater BMPs: RWMWD 2013 BMP Maintenance Pilot Program

Maintaining Stormwater BMPs: RWMWD 2013 BMP Maintenance Pilot Program. Paige Ahlborg Stormwater U April 1, 2014. RWMWD Permit Program. Volume reduction required on projects disturbing one acre or more of land Some install additional rain gardens based on resident interest.

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Maintaining Stormwater BMPs: RWMWD 2013 BMP Maintenance Pilot Program

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  1. Maintaining Stormwater BMPs: RWMWD 2013 BMP Maintenance Pilot Program Paige Ahlborg Stormwater U April 1, 2014

  2. RWMWD Permit Program Volume reduction required on projects disturbing one acre or more of land Some install additional rain gardens based on resident interest

  3. Type and Number of BMPs in RWMWD

  4. BMP Grading System • A- Continue Routine Maintenance • B- Minimal Maintenance Needed • C- Additional Maintenance Needed ________________________ • D&F- Not functioning as designed. Major fix required.

  5. Determine average cost of maintenance/BMP Comparing various age and maintenance regimes Determine feasibility of expanded implementation BMP Maintenance Pilot Program: Project Goals

  6. Little Canada • 59 BMPs • 1-7 years old • Living Streets • 31 BMPs • < 1 year old Little Canada Maplewood Living Streets

  7. Who will do the work? RWMWD Interns Outside Maintenance Contractor • Control over work performed • Extra time and cost • Number of hours required for full time crew • Less experience • Hire a crew supervisor at added cost • Existing companies already performing this work • Would have experienced crews • Would have to fit in their schedule but also not worry about filling time

  8. ROUTINE MAINTENANCE (BMP Grades A-C) • Remove litter, weeds, accumulated sediment, and other debris • Fill and protect any eroded areas • Add new mulch when needed • Supplemental planting as directed

  9. Spring Clean-Up Tasks

  10. Routine Site Visits

  11. What did we want to know?

  12. August 2013, After 3 Visits April 2013, Prior to Spring Cleanup

  13. April 2013, Prior to Spring Cleanup August 2013, After 3 Visits

  14. Maplewood Living Streets

  15. Total Hours and Material for 2013

  16. Results Summary

  17. Estimated Costs per Basin Size for Older Rain Gardens

  18. Challenges • Reporting Form • Keep more detail of time at larger basins • Lack of citizen involvement • Weather

  19. Next Steps • Extend contract for 2014 at same sites • Gather more data to refine results • Approach Cities with cost estimate to maintain their BMPs • Repair failing BMPs

  20. Questions? Paige.ahlborg@rwmwd.org (651)792-7964

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