Western Wake Regional Wastewater Project, North Carolina, USA
Key Data:
Site area
Approx 220 acres (88 hectares)
New plant capacity
18 million gallons (US) /day, expandable to 30 mgd
Anticipated flow at start up
9mgd
Projected maximum daily flows (in mgd)
Cary
5.8 (2011); 10.5 (2020); 16.3 (2030)
Apex
2.9; 6.2; 9.9
Morrisville
1.0; 1.5; 2.3
Existing capacity (in mgd)
North Cary
8.1 (current);12 (maximum permitted)
South Cary
7.8; 12.8
Apex
2.8; 3.6
Holly Springs
1.1; 2.4
Cape Fear River discharge capacity
24mgd (Phase I)
Sludge treatment
Aerobic (mixed)
Sludge detention period
20 days
Anticipated sludge production at start up
8 tonnes/day
Project cost
$380 Million
Project Timeline:
Strategic planning initiative began
July 1997
Wake county water/sewer plan adopted
September 1998
Regional studies project commissioned
May 2002
Phase I study
November 2002 – September 2003
Phase II study
October 2003 – July 2004
Land acquired
Summer 2006
Final EIS submitted to State
Late autumn 2006
NPDES permit issued by NCDENR
Summer 2007
Plant design phase completed
Autumn 2007
Construction begins
Early 2008
Phase I completed
Late 2010
Plant operation begins
January 2011
Phase II completed
Summer 2020
Key Players:
Project partners
Apex, Cary, Holly Springs & Morrisville
Lead partner
Cary
Additional key participants
Fuquay-Varina and Wake County
Consulting engineers
CDM, Hazen & Sawyer and CH2M HILL
Plant design
Arcadis / CH2MHill
Permitting bodies
North Carolina Department of the Environment and Natural Resources (NCDENR); North Carolina Environment Management Commission (NCEMD)
