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Ed himlan2015masccc

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Presentation at the 5th Massachusetts Sustainable Communities and 4th Sustainable Campuses Conference

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Ed himlan2015masccc

  1. 1. 4/16/15 Sustainable Communities and Campuses Conference Community Stormwater Solutions - Stormwater Impacts - Runoff Remedies - Solutions & Costs - Renewable Waters
  2. 2. Stormwater Kills streams &lakes SW is leading threat to health of water: • Flooding & low flows damage stream structure • Vanishing stream life (aquatic bugs & native trout) • Sediment decreases depth of lakes & ponds • Bacteria + nutrients = more weeds & less swimming SW problems (& solutions) are cumulative.
  3. 3. SW is easy to fix • Few people know runoff is a problem • Fewer people know how to reduce runoff • Streets are pathways for polluted runoff • Streets are tributaries to brooks • Disconnect street MS4’s with infiltration practices • Put runoff in ground to remove pollutants and recharge groundwater levels
  4. 4. [CT DEP 2007 Hartford Urban Conference slide]
  5. 5. [CT DEP 2007 Hartford Urban Conference slide]
  6. 6. [CT DEP 2007 Hartford Urban Conference slide]
  7. 7. Monoosnoc DCIA Pilot Strategy Communities want to improve local waters:  Supply maps to show MS4 pollutant loads  Identify priorities for CD planning process  BMPs for most TSS reduction at least cost  Guidance for municipal maintenance (e.g. street improvements, parking lots, etc.) Towns can disconnect 3% DCIA per year
  8. 8. Lower Monoosnoc MS4 discharges
  9. 9. Total annual load = 607 lbs. TP; 483 tons TSS
  10. 10. Lower Monoosnoc MS4 BMP’s
  11. 11. Cost Summary: DCIA Disconnect
  12. 12. Stormwater Solutions LUMC RG:  Cost $ 5,000  675 lb TSS/yr  0.4 lb TP/yr Granite SW Park:  Cost $100,000  45,000 lb TSS/yr  15 lb TP/yr
  13. 13. Stormwater Solutions Willard Street RG:  Cost $ 5,000  900 lb TSS/yr  0.9 lb TP/yr Samoset Sediment Basins  Cost $1,000  10 tons TSS/yr (8 basins)  TP/yr – n/a
  14. 14. Stormwater Solutions Grant St/Fall Brook:  Est. cost $ 3,000  Est. 9 tons TSS/yr  Est. 6 lb TP/yr Vine Street repaving:  Every street paving can reduce polluted runoff to local waters
  15. 15. More solutions underway … … Bioswales & “Tree box filters”
  16. 16. Community Stormwater Solutions: Stormwater is produced by the entire community and everyone can help to remedy polluted runoff Massachusetts Watershed Coalition www.commonwaters.org
  17. 17. Every Property Can Keep Water Clean & Healthy

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