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Cox Creek Water Reclamation Facility ENR

Project Background:
  • One of seven active Enhanced Nutrient Removal (ENR) projects pursued by County in compliance with theState’s Bay Restoration Program.
  • The overall County investment to upgrade each WRF totals more than $200 million.
  • When complete, nitrogen concentrate levels will be reduced from 8mg/L to 3 mg/L and phosphorus from 2 m/L to 0.3 mg/L.
  • ENR upgrades at the Cox Creek Water Reclamation Facility (WRF) represents the largest capital investment ($162 million) in County history.

Phase I

  • Reduction of existing primary clarifier tanks.

Phase II

  • Concentration of new membrane building at vacated primary clarifier location.
  • Improves the quality of our local waterways. 
  • Improves the quality of the Chesapeake Bay.
  • Meets Bay Restoration Program pollutant limits.
  • Significantly reduces nitrogen/phosphorous discharge.
  • 89% of overall project cost funded by State grants.
Project Manager/Contact:
Richard Meehan

Contractors: PC Construction

Inspection Manager: Black & Veatch

Additional Information:
Project Investment:
$162.6 million
Notice to Proceed:
March 2010
Completion Date:
Project Updates:
2012 Phase I Construction complete
Jul 2013 Phase II construction began
Dec 2013 Construction ongoing
May 2014 Construction ongoing in all areas, including the Reactors, The Membrane Bioreactor and the High flow building. Currect focus is on concrete and structural operations.
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