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North Coast Water Transmission and

Water Treatment Plant Capacity


Raw Water Storage Reservoir

1.14 million cubic metres

Main Storage Tank Capacity

2 x 40,000m³

Treatment Elements

8 up-flow clarifiers, 16 rapid gravity filters

Filter Media

Anthracite and sand

Raw Water Supply Main

7km, 1.8m diameter

Finished Water Transmission Main

57km, 1.8m diameter

Additional Storage

15 pre-stressed concrete storage tanks, capacity ranging from 4,000m³ to 20,000m³

Population Served

1.6 million

Project Cost


O&M Contract Annual Value

$12.6m (for 5 years)


Puerto Rico Aqueduct and Sewer Authority (PRASA)

Project Planning Team

VHL / Malcolm Pirnie


Puerto Rico Infrastructure Finance Authority (AFI)

Lead Contractors

Thames-Dick Superaqueduct Partners (Dick Corporation / Thames Water JVC) and Diez, Silva and Associates Engineering (QDSA)

Pipe Fabrication Subcontractors

Atlantic Pipe Corp

Operation and Management



Puerto Rico Water Co

Contract Signed

January 1996

Construction Commenced

September 1996

Transmission Project Commenced


Superaqueduct Completed


Initial Interconnections Completed

1999 / 2000

Sixth Interconnection Built


Construction Completed

April 2000

Formal Inauguration

6 September 2000

Operation and Management Contract Commenced

September 2000

O&M Contract Concludes

September 2005, with option to renew

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