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

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

4. Type and Number of BMPs in RWMWD

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

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

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

10. 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

11. 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

13. Spring Clean-Up Tasks

14. Routine Site Visits

15. What did we want to know?

16. City of Little Canada BMPs Suggested Supplemental Maintenance 1Little or nothing needed 2Some material needed 3Needs complete replacement BMP IDLocationSize (sq ft)Mulch NeedsPlantingsSod strip 08-25-A300 S Owasso Blvd.150323 09-04-F 3047 Thunder Bay Rd. (N property boundary)150111 09-04-G3036 Thunder Bay Rd.150111 09-04-I3024 Thunder Bay Rd.150312 09-04-U 3047 Thunder Bay Rd. (across street from 09- 04-F)250111 06-03-A381 Rose Ln.150333 06-03-B366 Rose Ln.150333 06-03-C350 Rose Ln.150333 06-03-D335 Rose Ln.150313 06-03-E329 Rose Ln.150313 06-03-F320 Rose Ln.150212 08-25-B2921 Condit St.150223 08-25-C2901 Condit St.150223 09-04-A401 Eli Rd.150312

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

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

19. Maplewood Living Streets

23. DescriptionSizeUnitUnit PriceStarting QuantityUsed October 31Total Used To DateTotal Price ($)Quantity Remaining To Date Little Canada Salt-Tolerant SodNASY $ 4.50 Herbaceous Perennial4" potEach $ 1.70 14.00 23.80 Herbaceous Perennial#1Each $ 6.00 10.00 60.00 Herbaceous- forbs, grasses, sedgesplugsEach $ 0.85 624.00 530.40 Deciduous Shrub#2Each $ 20.00 Deciduous Shrub#5Each $ 30.00 Evergreen Shrub#2Each $ 20.00 Evergreen Shrub#5Each $ 30.00 Trees and Shrubs#1Each $ 6.00 7.00 42.00 Shredded Hardwood MulchNASY $ 15.90 50.00 795.00 TOTAL MATERIALS ONLY: 705.00 1,451.20 Base Mobilization/DemobilizationNAEach $ - Spring Clean-up64Hour $ 80.0064.00 38.003,040.0026.00 Routine Maintenance144Hour $ 80.00144.0055.00194.5015,560.00-50.50 Extra Mobilization/DemobilizationNAEach $ 175.00 Extra LaborNAEach $ 80.00 TOTAL HOURS ONLY:208.0055.00232.5018,600.00-24.50 TOTAL LABOR + MATERIALS + TAX= $20,498.97 DescriptionSizeUnitUnit PriceStarting QuantityUsed October 31Total Used To DateTotal Price ($)Quantity Remaining To Date Maplewood Living Streets Salt-Tolerant SodNASY $ 4.50 Herbaceous Perennial4" potEach $ 4.00 Herbaceous Perennial#1Each $ 12.00 Deciduous Shrub#2Each $ 20.00 Deciduous Shrub#5Each $ 30.00 Evergreen Shrub#2Each $ 20.00 Evergreen Shrub#5Each $ 30.00 Shredded Hardwood MulchNACY $ 45.00 TOTAL MATERIALS ONLY: Base Mobilization/DemobilizationNAEach $ - Spring Clean-up48Hour $ 80.0048.00 13.001,040.0035.00 Routine Maintenance96Hour $ 80.0096.00 66.005,280.0030.00 Extra Mobilization/DemobilizationNAEach $ 175.00 Extra LaborNAEach $ 80.00 TOTAL HOURS ONLY:144.0079.006,320.0065.00 TOTAL LABOR + MATERIALS + TAX= $6,668.00 Total Hours and Material for 2013

24. Results Summary Living StreetsLittle Canada # of Visits46 # of Rain Gardens3057 Avg Size (sq ft)200250 Starting GradeAB-C Total Cost$6,668$20,498 Total Hours79.0232.5 Avg Cost/Hour$86$88 Avg Time/Garden (hours)2.23.9 Avg Cost/Garden$185$259

25. Estimated Costs per Basin Size for Older Rain Gardens SiteCost/Rain Garden 150-300 sf (maintenance + plants) $252 150-300 sf (maintenance only) $256 301-450 sf (maintenance + plants) $298 301-450 sf (maintenance only) $261 451-700 sf (maintenance + plants) $304 451-700 sf (maintenance only) $184 6800 sf (maintenance + plants) $749

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

27. 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

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