Field Office Compliance - Assistance

Assistance ID - 108044
Des Moines Water Works - 310338211
9966 Maffitt Lake Dr Cumming, IA 50061
Dallas County

FO 5

Report
File Name File Type File Date Note
Comments
8/2/2019 Re: Source Entry Point :: Consecutive System Question Gastineau, Janet <[email protected]> 6:59 AM (3 hours ago) to Mike, Tom Gave it some thought and the only current situation I can compare to what you're proposing is Cumming. I can't see a way we can get around not requiring source/entry point monitoring at a connection out of Bondurant back into the chloraminated, north part of the DMWW distribution system. We would have to add another source/entry point (SEP10) acknowledging Bondurant as the consecutive connection water is from. On Tue, Jul 30, 2019 at 11:30 AM McCurnin, Mike <[email protected]> wrote: Janet/Tom: I have a possible “source entry point :: consecutive system” question that I’d like to get your input. The northern components of our system include a chloraminated area. These components were originally part of the former Southeast Polk Rural Water District (SEP RWD), but several years back we merged this part of the system into our Des Moines PWS. Two pump stations (one with the chlorine/ammonia addition), two elevated towers, rural distribution mains, and a consecutive connection to Bondurant exist within this portion of system. The distribution elements and towers allow water service as far north as the Alleman area, but also the rural areas surrounding the community of Bondurant. An area east of Bondurant is at the root of today’s inquiry. Currently, computer modeling results are indicating the existing rural distribution mains that would serve prospective new customers east of Bondurant are at/near capacity. The small mains create a hydraulic restriction that limits proper pressures and flows. The hydraulic restriction could be eliminated if water were “wheeled” through the Bondurant system. Bondurant is amenable (and our Wholesale Master Agreement allows for such provisions) and we are attempting to understand what expenses and expectations would be come with making a second connection between the Bondurant and Des Moines PWS. This second connection would only allow water to flow out of the Bondurant system and back into the Des Moines System. Would there be daily monitoring/recording requirements (chlorine, volume, others) for such a connection back to the Des Moines PWS? Thoughts here? Is it a consecutive system if the water flows back to a system from which it came? We would be happy to discuss over the phone or in person if needed. JANET GASTINEAU
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