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During 2000-2001 we have defined several new sites for municipal wellfields in Central Indiana. We have supervised exploration in Owen, Putnam, Madison and Rush Counties.
In Owen County, Indiana, near Cataract Lake, a buried channel more than 175 feet deep was confirmed in an area of bedrock outcrop. An upgradient bend in the regional drainage stream and an unusual flowing spring marked the buried valley presence. This new wellfield is a wellhead protection required alternate water supply.
In Putnam County, Indiana, at Reelsville, the old cutoff channel of the ancient (possibly pre-Wisconsinan) channel was traced under US 40. An unusual shift in the regional drainage pattern exposed the buried channel. The deep outwash has been pumped tested for use as an alternate water supply to the existing remote source.
In Madison County, Indiana, at Ingalls, a deeply buried tributary valley is being developed as a one million gallon per day capacity wellfield. A series of poorly drained surface depressions on the till plain indicated the location of the buried valley. Individual wells have been successfully test pumped at over 500 gallons per minute. A combination of at risk surface water and wells currently provides the water supply.
In Rush County, Indiana, at Carthage, an erosional saddle that cut across a bedrock high, below an ice age sluiceway, was confirmed to contain a buried layer of sand and gravel more than 50 feet thick in on outwash channel deposit capable of supporting a new replacement wellfield. The existing wellfield was built with engineering standards that do not comply with the current well head protection rules.
Other new wellhead protection driven wellfields are being developed in other Indiana communities by ourselves and our competitors as a response to the need to separate potential sources of contamination from drinking water supplies.