Pressure pipe 101

The Southeast Water System Improvement project, Bloomington, Ind., expanded treatment capacity from 24 mgd to 30 mgd by adding 2 million gallons of storage; a 12 mgd booster station with expansion slots; and 44,000 linear feet of 24- and 36-inch L-301 prestressed concrete lined cylinder pipe (PCCP). The new water main from the plant parallels a 36-inch pipeline along a ridgeline for about half its length before diverging. Bloomington, Ind., Utilities Department managers chose prestressed concrete because it was cost-competitive with the other material they were considering, ductile iron, and historical precedence. The existing 36-inch concrete pressure pipeline has provided uninterrupted service since 1967.

The Southeast Water System Improvement project, Bloomington, Ind., expanded treatment capacity from 24 mgd to 30 mgd by adding 2 million gallons of storage; a 12 mgd booster station with expansion slots; and 44,000 linear feet of 24- and 36-inch L-301 prestressed concrete lined cylinder pipe (PCCP). The new water main from the plant parallels a 36-inch pipeline along a ridgeline for about half its length before diverging. Bloomington, Ind., Utilities Department managers chose prestressed concrete because it was cost-competitive with the other material they were considering, ductile iron, and historical precedence. The existing 36-inch concrete pressure pipeline has provided uninterrupted service since 1967.

The Southeast Water System Improvement project, Bloomington, Ind., expanded treatment capacity from 24 mgd to 30 mgd by adding 2 million gallons of storage; a 12 mgd booster station with expansion slots; and 44,000 linear feet of 24- and 36-inch L-301 prestressed concrete lined cylinder pipe (PCCP). The new water main from the plant parallels a 36-inch pipeline along a ridgeline for about half its length before diverging. Bloomington, Ind., Utilities Department managers chose prestressed concrete because it was cost-competitive with the other material they were considering, ductile iron, and historical precedence. The existing 36-inch concrete pressure pipeline has provided uninterrupted service since 1967.

Canyon Regional Water Authority, New Braunfels, Texas, managers specified 46,000 feet of 30-inch B-303 bar-wrapped concrete cylinder pipe to connect two pipelines because an existing concrete pressure pipeline has performed well over time. Customized fittings accommodated the service area’s hilly, sometimes steep, terrain. Introduced in 1973 by one of Hanson Pressure Pipe’s legacy companies, Snap Ring restrained joints eliminated the need for field-welding during installation.

Canyon Regional Water Authority, New Braunfels, Texas, managers specified 46,000 feet of 30-inch B-303 bar-wrapped concrete cylinder pipe to connect two pipelines because an existing concrete pressure pipeline has performed well over time. Customized fittings accommodated the service area’s hilly, sometimes steep, terrain. Introduced in 1973 by one of Hanson Pressure Pipe’s legacy companies, Snap Ring restrained joints eliminated the need for field-welding during installation.

The Milwaukee Metropolitan Sewerage District implemented the Harbor Siphons project so wastewater diverted to a deep tunnel system could be directly transferred to the Jones Island Wastewater Treatment Plant. Crews drove shafts 300 feet deep into the harbor connecting to Lake Michigan, tunneled under the riverbed and an island, and then back up into the plant. In addition to L-301 and E-301 prestressed concrete pressure pipe (PCCP) in seven sizes ranging from 42 inches to 96 inches, the shafts and tunnels required custom-designed fittings, mechanically restrained dual rubber O-rings that allow joints to be air-tested immediately after installation, and specially designed lifting lugs.

The Milwaukee Metropolitan Sewerage District implemented the Harbor Siphons project so wastewater diverted to a deep tunnel system could be directly transferred to the Jones Island Wastewater Treatment Plant.

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