Longmont Potable - Water Treatment Plant, CO, USA
Key Data:
Total site
122 acres (49ha)
Treatment capacity
114,000m³/d expandable to 228,000m³/d; possible further expansion to 300,000m³/d
Pre-treatment
2-stage rapid mixing, 3-stage flocculation and high-rate lamella plate settlers
Filtration
6 x deep-bed dual-media filters
Filtration media
Anthracite / sand
Reservoir capacity
114,000m³
Raw water pipeline
3 x 30in-diameter steel
Treated water (main City) pipeline
1 x 54in-diameter steel
Additional treated water pipeline
8in-diameter steel
Project cost
$60.7 million
Project Timeline:
Initial master plan studies
1989 and 1999
Project initialised
October 1999
1041 Permit application
June 2001
1041 granted
October 2001
Contract awarded
2002 (fourth quarter)
WTP design began
January 2003
Pipeline scheme design began
May 2003
WTP construction began
August 2003
Pipeline construction began
October 2003
First raw water pipe connections
March 2005
Process building finished
April 2005
Reservoir filled
May 2005
Scheduled completion (original)
February 2006
Expected completion
August / September 2005
Start up
Late summer 2005
Anticipated final raw water pipe connection
Late-2005
Key Players:
Client
City of Longmont
Main contractor (design and build)
Western Summit / Black & Veatch Joint Venture
Electrical / instrumentation and control contractor
MWI McDade-Woodcock
Architects
Greenburg & Greenburg
Pipeline contractors
Garney Construction / Integra Engineering
