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Alvarado Water Treatment Plant

Rated Treatment Capacity

Current

454,000m³/day; 567,000m³/day (as direct filtration plant)

Final

756,000m³/day

Treated Water Storage

Original

160,000m³

Upgraded

290,000m³

Earl Thomas Reservoir

Diameter

124m

Depth

11.5m

Capacity

133,000m³

Flocculation / Sedimentation New Basin Design Capacity

756,000m³ (33% increase)

Project Costs

Phase I

Construction $52m

East and West Reservoirs $26m

Overall $109,986,000

Phase IA

Construction $28m

Overall $33m

Phase II

$56m

Phase IV

$57m

Phase III

$20m

Phases II–V

Overall $107m (estimated)

Upgrade Expansion Programme Began

1993

East / West Reservoirs

1996

Project Wins ASCE National Award & APWA Project of the Year

1998

Reservoir Design Work Began

2000

Old Earl Thomas Reservoir Demolished

September 2002

Phase I

November 1998–February 2003

Phase IA

November 2002–December 2005

Phase II

April 2004–March 2007

New Earl Thomas Reservoir Officially Dedicated

December 2004

SD-17 Pump Station

July 2005–June 2009

Phase III

January 2011

Phase IV

2011

Phase V

July 2012–February 2013

Upgrade Completion (Scheduled)

2013

Client

San Diego County Water Authority

Design

Malcolm Pirnie Inc & Richard Brady Associates

Construction Manager

CH2M Hill

Programme Manager

Parsons

Prime Contractors

Nielsen Dillingham (Phase I), C. E. Wylie (Phase IA)

Phase I Major Subcontractors

Helix Electric, J. R. Concrete, Pacific Coast Steel, Murphy Coatings, Watkins

Phase IA Major Subcontractors

D.Y.K., the Tunnel Group, Hurricane Fencing, A. O. Reed.

Phase II Major Subcontractors

Archer Western

Cement Mortar Lined Steel Pipes

Ameron, Northwest Pipe, American Pipe

Pipe Couplings

Victaulic

Valves

Pratt Valve

Valve Actuators

EIM

Chlorination and Associated Safety Equipment

US Filter

Chemical Tanks

Tankentics

Pumps

Fairbanks Morse

Phase III Contractor

Stanek Constructors (flocculation/sedimentation)

Phase IV Contractor

Archer Western Contractors (ozone building)
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