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Canoe Brook Water Treatment Plant Upgrades

Canoe Brook Water Treatment Plant Upgrades. When You Have to Build in the Floodplain. Thomas Dixon, PE John Dening, PE, CFM. Introduction. Project Team HMM CDM Client New Jersey American Water. Project Location. Existing Site. Two – 10 MGD WTPs on site Total Firm Capacity 13.5 MGD

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Canoe Brook Water Treatment Plant Upgrades

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  1. Canoe Brook Water Treatment Plant Upgrades When You Have to Build in the Floodplain Thomas Dixon, PE John Dening, PE, CFM

  2. Introduction • Project Team • HMM • CDM • Client • New Jersey American Water

  3. Project Location

  4. Existing Site • Two – 10 MGDWTPson site • Total Firm Capacity 13.5 MGD • Water Supply • Passaic River • Canoe Brook • Wells

  5. Proposed Site • Single facility to replace existing two • DAF Building • Pumping Station • Clear well • Dewatering Building • Sludge tank • Misc

  6. Project Need • Existing plant from 1920’s • Required to meet new treatment standards • Half of plant often isolated by floodwaters

  7. How it should be Draft Flood Hazard Area Technical Manual – Dec 2008

  8. March 2010

  9. How it all started

  10. How it often is Draft Flood Hazard Area Technical Manual – Dec 2008

  11. The Pre-App • Involve the whole team • Bring the Client • Bring the PM • Work with DEP they will work with you • Can’t break the rules • Help you work within them

  12. The Application • 1,500 lf of Verification • Bridge with Hydraulics • Grading with Net Fill Calcs • 10 – Utility Crossings • Retaining wall < 4’ • Private Roadway • 4 – Stormwater Outfalls • 6 – Other activities • Stormwater Management

  13. The Riparian Zone

  14. Floodplain Storage Volume

  15. Floodplain Storage Volume

  16. Impervious Cover

  17. Impervious Cover

  18. Get Creative

  19. Conclusion • Get everyone involved • Coordinate between permitting requirements and site design. • Communicate with the DEP • They are there to help. • See it for yourself • Think, does this make sense? • Be creative

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