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SOUTH PLATIE SURFACE WATER SUPPLY INVENTORY There are mOTe than 300 urban wal€r supply agencies in the basin, Over 200 of which rely on the Denver Water Department for at least part of their supply. In 1970. there were 3,274 individual water rights held in the basin. These included 2,092 diversion rights and 1.182 storage rights. There an' 900,000 irrigated acres in the South Platte River basin. THE NUMBERS GAME To understand just about anything today, you need to know a fe..... numbers. .....ell maybe a lot of numbers! Phone numbers. street numbers, license numbers. social security numbers, account numbers. . . the list seems to be endJess. Well. here's thrcc more that you'll need to know just to understand water quality planning: 3.e - This is 8 sl'Ction of the original Water PoUution Control Act of 1970 that provided for the funding of regional urban water quality planning. The OHCOG Water Quality !\lanagement Report. com. pleted in 1974, .....as prepared with the help of a 3.C grant. 208 - A section of the 1972 Water Pollution Control Act Amendments called PL 92.500 that provides for regional planning similar to the old 3.C plan but is much more comprehensive. ORCOG has a $1.25 ~lillion EPA grant. and LWRCOG has a S590,OOO EPA grant. Both plans will be completed in 1977. 303(el - A section of PL 92.500 providing for water quality management planning for river basins within states such as the South Plat~ or Arkansas Rivers. WATER QUALITY Water quality is an integral part of any urban study. The Needs Idf'ntification and Supplcmcmt to the Plan of Study published in May 1975, outlines an important role for walE'r quality in this study. The first phase consists of t.....o parts. Thf' first was the preparation of the 3031e) South Platte WaU>r Quality Management Plan by the State of Colorado. This .....as completed and approved in November 1974. The second part is the preparation of a water quality plan for castt'm Adams and Arapahoe Counties and western Boulder and Jefff'rson Counties. These areas are not included in either the 303(el Basin Plan or Denver's 3-e Plan. The Corps of Engineers entered into an agreement with the Denver Regional Council of Governments IDRCOGI for the preparation of the Mountain and Plains Area Plan to deal specifically with these areas. This plan .....as completed in July 1975. The second phase .....as initially outlined as a cooperative effort between the Slate, DRCOG, EPA, and the Corps of Engineers. Non.point source problems such as irrigation return flows and other identified in the 303(el Basin Plan .....ere to be the basis of the water quality effort in the South Platte Urban Regional Study. This has recently been changed by the availability of 208 .....ater quality planning grant funds within the EPA. These funds are given to the designated regional planning agencies for preparation of area.....ide water quality management plans. The Larimer-Weld Council of Governments (LWCOG) has received 208 designation. Therefore, the waLer quality planning effort in this area will be greatly scaled.down to eliminate possible duplication of efforts_ ............................ STUDY TEAM MEMBERS . . Project Manager . . . . . . . _ . . . Water Supply . .. .. Water Quality . _ . Institutional Studies .... Economic Analyses . . . . .. .. Social Analyses . . Environmental Analyses .land Use Studies . . PubliC Involvement .. Hydrologic Analyses . . Hydraulic Analyses . . . Flood Control Studies . Flood Conlrol Studies _Computer Simulations . .. .. Stenographer . . . . . . .. .... . . Stenographer John Velehradsky. Chuck Turner. Roy McAllister. . . Bill Swegle. .. Warren Brown. Rick Miner.. _.. Bill McNeil. Paul Barndt . .. Jim Walter ..... Wally Stem. . . Howard Denker. . . Oliver Nelson. John Kilday..... Chuck Hlllerson Connie Hunter Edle Wilson ..... Commellt.s alld Ql.lf..srions should be addr-essed to: WATER WRITES l1. S. ARMY F.SGII'OEER DISTRICT, OMAHA ATTN: MROPD.R 6014 U. S. Post Office & Courtbou8t' Omaha, NE 68102 2gGJ ............................