Beneath the streets of Reno and Sparks runs more than 2,150 miles of water mains, forming a vast underground network that serves nearly half a million residents.
According to Truckee Meadows Water Authority, the system ranks among the larger water utilities in the country, though it does not approach the scale of major metropolitan systems. With that size comes continuous maintenance and long-term replacement planning.
Depending on materials and environmental conditions, water mains can last 60 years or longer. Many of the oldest pipes remain in Reno and Sparks’ first neighborhoods, including downtown areas near the Truckee River, where the cities first expanded.
When determining which lines to replace, TMWA considers several factors, including the pipe’s age, history of leaks, and whether repeated repairs have become more costly than full replacement. The utility also coordinates with local governments to align pipe replacement with upcoming road construction projects, aiming to prevent newly paved streets from being cut open for later repairs.
Water main breaks can vary in severity. Major breaks have the potential to flood intersections and disrupt traffic, while smaller leaks are more common. Crews use specialized detection equipment, including sensitive microphones that can pick up the sound of water escaping underground, to locate hidden leaks.
TMWA crews respond to issues year-round, 24 hours a day, and seven days a week. The utility spends between $30 million and $40 million annually on infrastructure replacement and upgrades, including pump stations, storage tanks, treatment plants, wells, and water mains. Of that total, water main replacement projects account for approximately $7 million to $8 million each year.
While TMWA is responsible for maintaining the water system up to the meter, homeowners are responsible for the service line running from the meter to their home. Repairs to that line can range from $5,000 to $10,000.
The Old Blog in the Desert 
Leave a comment