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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

Canoe Brook Water Treatment Plant Upgrades

When You Have to Build in the Floodplain

Thomas Dixon, PE

John Dening, PE, CFM


Introduction
Introduction

  • Project Team

    • HMM

    • CDM

  • Client

    • New Jersey American Water



Existing site
Existing Site

  • Two – 10 MGDWTPson site

  • Total Firm Capacity 13.5 MGD

  • Water Supply

    • Passaic River

    • Canoe Brook

    • Wells


Proposed site
Proposed Site

  • Single facility to replace existing two

    • DAF Building

    • Pumping Station

    • Clear well

    • Dewatering Building

    • Sludge tank

    • Misc


Project need
Project Need

  • Existing plant from 1920’s

  • Required to meet new treatment standards

  • Half of plant often isolated by floodwaters


How it should be
How it should be

Draft Flood Hazard Area Technical Manual – Dec 2008




How it often is
How it often is

Draft Flood Hazard Area Technical Manual – Dec 2008


The pre app
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


The application
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








Conclusion
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