Laserfiche WebLink
Drought Supply Gap <br /> • Combined 2017 drought supply gap(Decatur SWTP and ADM NWTP)Is 2,584 million gallons(MG),or 7,930 <br /> acre-feet.Combined 2050(growth)supply gap is 3,101 million gallons(MG),or 9,517 acre-feet. <br /> i • Reduction of minimum operating pool from 607 ft to 604 ft eliminates 54%of the 2050(growth)supply gap, <br /> adding 1,670 MG,or 5,125 acre-feet of supply made available by the recently completed dredging program <br /> • Below a minimum operating pool of 607 ft,ADM's NWTP raw water intake is inoperable and this supply to ADM <br /> would be interrupted.Alternative supplies would be required. <br /> • Lake Decatur water levels have not been below 607 ft since 1954.Relatively recent low lake levels are 610.6 ft in <br /> 2012 and 608.6 ft in 1988. <br /> 2050(Growth)Drought Supply Gap 2050(Growth)Drought Supply Gap <br /> .�/ IMO l -- <br /> r Minimum OperatlnaPoo1607�f �----------_.___:'f ••1 MMknum OpaMkrg Pod 604ft -_. - <br /> Reduce <br /> Minimum —, �------_ .- - <br /> Supply i Operating i- SWp ap <br /> . <br /> ., '�'�'3,101 MG Pool to 1,431 MG <br /> # f - 604 ft. .'.h <br /> 1 <br /> Supplemental Sources <br /> Potential <br /> Source Alt No Description Drought Supply <br /> (MG/year) .._ <br /> Lake SA Lake Decatur,minimum pool 604 ft. 1,670 - <br /> Decatur 1B Lake Decatur,minimum pool 603 ft. 370 •,,+- <br /> Mahomet 2A DeWitt Well Field 630s' ' <br /> Aquifer 2B DeWitt Well Field with Pipeline 900 a..riw <br /> 3 Former Vulcan Pit 250 , _ <br /> 4A Lake Tokorozawa,direct intake 900 •.'s . <br /> Shallow 48 Lake Tokorozawa,horizontal wells 900 r <br /> Aquifer 5A/5B Radial Collector Wells,downstream 1,200 ~• Zt"- ~ <br /> 6 Radial Collector Wells,above dam 180-360 <br /> 7 Active Vulcan Pit,direct intake 3,000 ! w <br /> • +vI.Mrd <br /> • Potential drought supply is estimated .; """r'"-o•'r r`�` <br /> based on operation during the 10- . ' - ',.r.:•-`7."" - " 'M�;�• <br /> month design drought period I;.--. <br /> - ,_'_ i__._ �-i <br />