CASE STUDIES


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GRAND FORKS WASTEWATER AUTHORITY - NORTH DAKOTA, U.S.A.

In late October 2008, the Grand Forks Wastewater Authority (Authority) located in Grand Forks; North Dakota initiated a project to conduct a condition assessment of an 8.8 mile 30- and 36-inch wastewater force main.

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PLAINS MIDSTREAM– ALBERTA, CANADA

Pure Technologies (Pure) conducted several successful inspection simulations with Plains Midstream before the client progressed to a series of commercial inspections.

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MUSKEGON COUNTY - SEWER FORCE MAINS

In 2007, Muskegon County’s 35-year old large diameter wastewater force main failed catastrophically. Although historical data demonstrated that joint leakage had never contributed to previous events, extensive failure analysis of this event by Prein & Newhof, determined that a leaking joint had played a significant role in the failure.

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THE PHILADELPHIA WATER DEPARTMENT (PWD)

The Philadelphia Water Department (PWD) has focused on water loss management programs for the past decade and is well known for its annual water audit and for pioneering new methods such as the use of District Metered Areas (DMA) and advanced pressure management. In 2007 PWD also began to use the Sahara system for precise leak location on its large diameter water transmission mains.

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MAN-MADE RIVER AUTHORITY (MRA)

With more than 4,000 km of mainly four-metre diameter prestressed concrete cylinder pipe (PCCP) in operation, the Man-Made River pipeline is the one of the largest water projects in the world.

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FRED HARTMAN BRIDGE - HARRIS COUNTY, TEXAS

After the Fred Hartman Bridge was completed in 1995, large-amplitude vibrations of the cables were observed. Following comprehensive testing, TxDOT installed a SoundPrint® Acoustic Monitoring System to monitor any wire break activity occuring within the stays.

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WALDO-HANCOCK BRIDGE - VERONA, MAINE

In order to ensure the future safety of the bridge, Maine DOT commissioned Pure Technologies to install a SoundPrint® acoustic monitoring system to detect and locate any future wire breaks. The SoundPrint system utilized wireless sensors to monitor both main cables from anchorage to anchorage.

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NORTH TEXAS MUNICIPAL WATER DISTRICT

One of NTMWD’s pipelines is a 42" reinforced concrete main that supplies water to NTMWD’s southern service area. District staff knew that this line had a leak as water was surfacing in the intersection of Jupiter and Beltline, a very busy intersection in Dallas County.

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EL PASO WATER UTILITIES (EPWU)

In June 2005, Pure Technologies conducted a non-destructive evaluation of two areas of the Roseway Water Transmission Main using electromagnetics. As this pipeline is too small for manned entry, Pure Technologies elected to use it a robotic inspection tool called PipeCrawler.

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SAN FRANCISCO PUBLIC UTILITIES COMMISSION (SFPUC)

The San Francisco Public Utilities Commission (SFPUC) provides water to 2.4 million people in San Francisco, Santa Clara, Alameda and San Mateo counties. It serves 29 wholesale water agencies and delivers approximately 260 million gallons of water per day to its customers through a 280-mile pipeline network.

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