Alvarado Water Treatment Plant, San Diego, CA, USA
Key Data:
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
Construction $28m
Overall $54m
Phase IV
$61m
Phase III
$20m
Phases II–V
Overall $107m (estimated)
Project Timeline:
Upgrade expansion programme began
1993
East/West Reservoirs
1994–1998
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
14 December 2005
SD-17 Pump Station
July 2005–June 2009
Phase III
August 2009 - end of 2010
Phase IV
June 2008– end of June 2010
Phase V
July 2012–February 2013
Upgrade completion (scheduled)
2013
Key Players:
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)
