Related News
Related News
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Spill Drill 2024: EWEB & partners practice containing hazardous materials spills on McKenzie River
EWEB coordinates the drill as part of our work to protect the McKenzie River – the source of drinking water for more than 200,000 residents of the Eugene metro area.
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Imagine a Day Without Water 2024
Learn how you can prepare for an extended water outage.
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“We're just surrounded with people who are really helpful."
Michele Victor lost her home, septic system, and two cats to the fire. But thanks to EWEB's Septic System Repair and Replacement Grants, she is one step closer to rebuilding her home.
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EWEB Partners with the City and YMCA to Celebrate New Amazon Park Emergency Water Station Site
Hundreds of attendees practiced filling up water containers at Saturday's demonstration event.
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Source Water Protection Week: Our Commitment to Clean Water
EWEB celebrates our community's commitment to protecting the McKenzie River, the source of Eugene's drinking water.
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EWEB Communications Team Wins Top Awards at Northwest Innovations in Communications Conference
Competing against public utilities from across the region, EWEB brought home two significant awards in recognition of our work to engage and inform the community.
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September is National Preparedness Month: 3 tips to prepare your home & family
Let's "Be Ready" together!
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EWEB invests in preparedness for severe weather and natural disasters
Just as you take steps to safeguard your home and family, EWEB is investing in equipment and processes to ensure our community’s electric and water systems remain reliable in the face of adversity.
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EWEB, SUB and RWD join forces at Lane County Fair to distribute water to fairgoers
The Eugene Water & Electric Board, Springfield Utility Board and Rainbow Water District are teaming up for the 9th year to provide fairgoers with clean, cold free water.
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EWEB prepares for rising energy demand as weekend heat wave arrives
Electricity supply is sufficient for now, but new supplies will be necessary in the years ahead to keep pace.
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EWEB bids a fond farewell to College Hill Reservoir and prepares for modern drinking water storage tanks
Several hundred Eugene residents came together on May 30 for a Farewell Celebration at EWEB’s College Hill Reservoir before demolition and construction to build modern drinking water storage tanks begins later this year.
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EWEB invests in satellite-based forestry analytics for vegetation management
EWEB maintains over 1,300 miles of overhead transmission and distribution lines. To aid crews in identifying hazardous vegetation growth in a sometimes heavily forested service territory, EWEB is utilizing a new satellite-based forestry analytics software called Overstory.
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Drinking Water Week 2024
This week, we celebrate the value of clean, safe water, the importance of water infrastructure, and the critical role of water professionals.
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The Big Freeze 2024: After Action Report
Winter 2024 was one for the records books, and we'll look back on it for years to come and say, "That was a doozy!" The back-to-back January Ice Storms caused widespread damage to EWEB’s service territory, affecting approximately 38,000 customers. Preliminary repair costs were over $8 million, and additional repairs to transmission lines are still required.
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Fixing the Unseen: Water Pipeline Replacement in Unincorporated Eugene
Learn more about EWEB's methods for monitoring and replacing aged water pipelines.
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Smart Tech Saves Time and Money in Locating Leaky Water Pipes
June 12, 2017
A recent water pipeline assessment that relied on a free-swimming acoustic sensor called a SmartBall® is an example of using innovative, cost-effective methods to maintain our infrastructure.
Buried infrastructure: Our community's invisible assets
Most people know that Eugene's drinking water comes from the McKenzie River. We divert water from the McKenzie at our intake outside of Springfield, and pump it to the Hayden Bridge Filtration Plant where it is filtered and disinfected. What happens between the Hayden Bridge plant and customer taps is, for many, a mystery. Water travels through hidden, underground pipelines 24 hours a day, 365 days a year, beneath roads, sidewalks, rivers and buildings. These water pipelines are the backbone of our community's drinking water system.
Transmission mains are large-diameter pipelines that convey treated water to storage reservoirs or to the smaller-diameter pipes that distribute water to homes and businesses. EWEB maintains 36 miles of transmission mains—enough to connect Skinner Butte and Spencer Butte almost seven times.
Maintaining the transmission lines is no small job.
First of all, transmission lines are big. Your average 5-year-old could stand inside of one with headroom to spare. They also are long—sometimes several miles long, and buried deep underground—usually 30 inches or so.
Two of EWEB's primary transmission mains leave the Hayden Bridge treatment plant and convey an average of 25 million gallons of water each day, over a distance of four miles into the Eugene city limits. And in some cases, the mains are close to or directly beneath existing homes, businesses, roads and natural areas, making them hard to assess and even harder to repair or replace. The 45-inch Hayden Bridge transmission pipe, constructed in 1948, travels underneath Interstate-5. Another 30-inch main travels under the Valley River Inn. Several of our transmission pipes journey beneath the Willamette River at different locations around town.
And like most pipes, these transmission lines can leak from time to time.
Over the last few years, EWEB crews found and repaired two "pinhole" leaks on the 45-inch Hayden Bridge main. Fortunately those leaks were under a grassy surface near a bike path, and therefore relatively easy to repair. But there's always a chance that a small leak could exist underground, undetectable from the surface. Assessing the condition of the pipes, and finding and fixing small leaks before they become big problems, is important but difficult work.
In 2016 a leak was discovered on EWEB's 45-inch transmission line near the Hayden Bridge Water Filtration Plant.
"Infrastructure decisions affect the whole community for generations to come, and replacing buried infrastructure, in particular, is very costly," said EWEB civil engineer Nathan Endicott. "It's important to know the condition of existing pipes so that we can effectively plan and budget for both immediate and long-term projects." Nathan and his engineering colleagues have been researching effective ways to check transmission lines for leaks and, after a lengthy review and planning process, they landed on an innovative solution called a SmartBall.
SmartBall "listens" for leaks
A SmartBall is an acoustic sensor wrapped in a foam covering. It travels through the pipeline listening for the sounds of leaks and air pockets. Its highly sensitive acoustic sensor can locate pinhole-sized leaks, while a monitoring device marks the location of the leak. It's accurate to within a few feet of an actual leak.
"Thanks to modern technology, we have many options available for leak detection and condition assessment," said Nathan. "An EWEB review committee selected the SmartBall solution because it was proven effective for inspecting miles of pipe in a day, and could be used for a fraction of the cost of other acoustic inspection methods." Using the SmartBall, EWEB engineers were able to assess more than five miles of transmission main from Hayden Bridge to headquarters in less than six hours.
Check out this video to learn more about how the SmartBall works.
Surprising results?
Engineers were pleased, and a little surprised to learn there are currently no leaks in either of the transmission mains from Hayden Bridge. "Considering the age of the pipes, and the stress they sustain over time, we expected to find at least a few small leaks, if not worse," said Nathan. "But we're fortunate that the engineers who designed this part of the water system some 60 years ago used good, durable materials."
The transmission mains that Nathan and his team recently assessed are constructed of thick steel. Steel pipes are known to perform well, even under extreme external loads and unusual conditions, such as uneven ground and soil movement. "Maintaining infrastructure is a critical issue across the nation, and many utilities are facing huge problems with less durable pipes like pre-stressed concrete cylinder pipes that, when they fail, they fail catastrophically," said Nathan. "We have high-quality buried infrastructure, but we still have to make ongoing investments to maintain that infrastructure. It's a community-wide benefit and a community-wide responsibility."
Our community is investing in water
EWEB owns and maintains over 800 miles of pipes, 23 enclosed reservoirs and other facilities that deliver water to customers taps. Many of today's water systems were built more than 50 years ago. Thanks to investments by past generations, we've had the luxury of delaying major infrastructure replacements necessary to maintain reliable water delivery. Now it is our turn to make the investment to maintain safe, reliable drinking water for future generations.
EWEB's Water Reliability Initiative includes several infrastructure reliability projects over the next 10 years, including replacing water mains, upgrading interties, upgrading or building new reservoirs, adding back-up electrical power to pump stations, expanding the Hayden Bridge Filtration Plant, and developing alternative water sources. "We are committed to regular maintenance so our community's water system stays in excellent shape," said Nathan. "Since every dollar spent on infrastructure ultimately affects customer bills, it's important to make those investments strategically."
Assessing the condition of our water infrastructure with solutions like the SmartBall allows us to focus resources on critical work such as seismic upgrades and developing alternative water sources, with the confidence of knowing we can defer work on pipes that are in generally good condition.
SmartBall image courtesy of Pure Technologies.