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12 <br /> ENVIRONMENTAL <br /> City of Decatur,IL SERVICES° <br /> DECATUR,IL-Multi-Year Leak Detection Program for the Department of Water Management <br /> A leakage investigation on 176 miles(^'1/3)of the City's water <br /> . , distribution system has been conducted since 2008.This <br /> included listening on all hydrants and strategic main line valves <br /> �I and selected B-Box service valves using sensitive sound <br /> 4 <br /> intensifying instruments. A subsequent investigation was <br /> conducted in all suspect areas where indications of leakage <br /> .� were detected by using an electronic leak correlator to pinpoint <br /> Le <br /> the leaks for repair. ADS also performed correlation on 7 water <br /> '` w A <br /> mains that have been identified as river or lake crossings to <br /> ensure no leakage is occurring on these mains. Additionally,ADS was contracted to perform Master <br /> Meter testing at 11 meters,5 of which were water treatment plant meters and 6 which were large <br /> commercial meters. This project was also featured in Municipal Water and Sewer in January of 2011, <br /> showing a 5:1 return on investment from 2008 to 2010. <br /> "We're always looking at our water accountability.You're always upgrading your meters to make sure they're <br /> accurate.This was just one piece of the puzzle:Let's find some leaks that we can't see." <br /> # Randy Miller,Water Services Manager City of Decatur,IL <br /> We had about a 17%apparent water loss between what we pump out of our water treatment plant and what we <br /> i bill to our customers.We thought one of the most important ways to start toward lowering that percentage was to <br /> do a systemwide leak detection survey.~"Certainly we had the majority of our water loss through our water mains. , <br /> But the amount that we were losing from hydrant leaks and water service leaks surprised me.I didn't expect those <br /> numbers to be as high as they were.Those are easy fixes that we were able to do right away." <br /> Keith Alexander,Director of Water Management City of Decatur,IL <br /> `fears miles Surveyed ##of Leaks Fount; Annual Water Loss <br /> 2017-2019 .,28 miles J leaks j.,005,000`,pd._ <br /> 2014-2016 528 miles 7:1 leaks 1,?78,000 gpd <br /> 20] .-20 iv `,s 8 1-niles a9 leaks 847,000 glad <br /> 2008-2010 528 miles 75 leaks 516,000 gpd <br /> Randy Miller <br /> Water Manager Firms Involvement:I <br /> City of Decatur <br /> Cost:Total Annual 000 Project <br /> One Gary X Anderson Plaza <br /> Decatur,IL 62523 <br /> Manager:Steve Hugoins,PM <br /> (217)`875-5705 <br />