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Case Study

Moulton Niguel, CA, USA

The Moulton Niguel Water District (MNWD) provides water, recycled water and wastewater service to approximately 170,000 people within its service area, located in Orange County, California. In 2015 MNWD contracted Pure Technologies U.S. Inc. (Pure) to perform a condition assessment of the Central Intertie Pipeline, a large diameter steel pipeline running through residential areas and busy transportation corridors.

Constructed in 1994, the pipeline is a potable water transmission main that travels under Oso Parkway in Mission Viejo, California and is comprised of 54-inch cement mortar lined and coated welded steel pipe.

To date, the pipeline had not experienced any reported failures or leaks.

Project Details

Services
PureMFL Magnetic Flux Leakage inspection

Structural design evaluation

Pipe risk assessment

Remaining useful life analysis

Repairs overseen by Pure

Timing
2015
Pipe Material
Steel
Inspection Length
2.6 miles (4.2 km)
Diameter
54-inch (1370mm)
Transmission Type
Water

Project Highlights

 

Total of 395 pipes inspected

 

Inspection located 380 metal loss defects in 6 miles of pipeline

 

 

212 pipe sections affected, all less than 70 percent wall loss

31 repair locations selected for steel patch repairs

THE CHALLENGE

The Moulton Niguel Water District (MNWD) was formed in 1960 and provides water, recycled water and wastewater service to approximately 170,000 people within its service area, located in Orange County, California. In 2015 MNWD contracted Pure Technologies U.S. Inc. (Pure) to perform a condition assessment of the Central Intertie Pipeline, a large diameter steel pipeline running through residential areas and busy transportation corridors. Constructed in 1994, the pipeline is a potable water transmission main that travels under Oso Parkway in Mission Viejo, California and is comprised of 54-inch cement mortar lined and coated welded steel pipe. To date, the pipeline had not experienced any reported failures or leaks.

What solutions did Pure Technologies and the Moulton Niguel Water District come up with to solve this challenge? Find out and explore the results we achieved together by downloading the full case study below.