2011-02-24_HYDROLOGY - M1978056 - Laserfiche WebLink

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Cheryl Signs, P.E. Durham Pit, DRMS-1978-056 Page 3 February 14, 2011 Replacement The proposed source of replacement for this pit is 48.7 acre-feet (93.18 acre-feet of headgate deliveries and 44.5 acre-feet of return flow obligations) of historic stream depletions from the dry-up of 33.7 acres of land historically irrigated with five shares of Greeley Irrigation Company's interests in Greeley Canal No. 3 and 2.9 acre-feet (4.9 acre-feet of deliveries and 2 acre-feet of return flow obligations) of historic stream depletions in the applicant's interest in the Fossil Creek Reservoir diverted from the Cache la Poudre River and previously used for irrigation of the mined property. The values for the historical use credits of the five shares of Greeley Canal No. 3 were prorated from the historical use analysis values decreed for the Greeley Irrigation Company in Case No. 96CW658. After applying the five shares of Greeley Canal No. 3 and the Fossil Creek Reservoir water, there will be 26.76 acre-feet of uncompensated depletions. Additional replacements for depletions during the non-irrigation season and during months with insufficient credits will be made by releases from water stored in Dakolios Pit and 112 Reservoir. The water in storage is primarily junior water rights that were decreed in case no. 2001 CW274 (1,237 acre- feet). Water was diverted through the Rural Ditch for storage in the 112 Reservoir and the Dakolios Reservoir over the extended free river period that started in September 2009 and continued through the beginning of June 2010. According to the decree in case no. 2001 CW274, water stored in the reservoirs or used directly at the point of diversion may be used for replacement of depletions at the mining sites owned or leased by VCI. The Durham Pit site has been identified as one of the mining sites where the junior water rights decreed in case no. 2001 CW274 may be used as a source of replacement water. You indicated that as of November 2010 the water stored in the 112 Reservoir and Dakolios Reservoir totaled 1,468 acre-feet consisting of a combination of Rural Ditch water and junior water decreed in case no. 2001 CW274. The attached Tables 2A and 2B show the reservoirs operations over the next two years. The average ground water contribution and direct and indirect precipitation for the two pits has been included in the study. The Applicant intends to use the junior water instead of the Rural Ditch water that had previously been stored in the 112 Reservoir. Thus, the replacements for depletions at Durham Pit will be satisfied by delivery of junior water decreed in case no. 2001 CW274 and previously stored in the 112 and Dakolios Reservoirs. Delivery of augmentation water to the Cache La Poudre River is subject to transit losses as determined by the water commissioner and the division engineer. The water rights decreed in case no. 2001 CW274 can be used directly at the points of diversion or retained in reservoirs for storage when the water rights are in priority or used by exchange for releases from any or all of the reservoirs or any or all of the direct flow sources. The decreed information for these junior water rights is shown in the following table: WDID Source Appropriation Date Decreed Amount 0600532 VCI Godding Ditch Diversion from Idaho Creek 08/10/2001 11 cfs 0600551 VCI Rural Ditch Diversion from Boulder Creek 08/10/2001 11 cfs 0600756 VCI Rural Ditch Diversion from Idaho Creek 08/10/2001 11 cfs 0500642 VCI Goddin Hollow Diversion 09/08/2000 11 cfs 0500589 VCI Last Chance Ditch Diversion 08/10/2001 11 cfs 0504001 112 Reservoir 08/10/2001 1,552 acre-feet 0504003 Dakolios Reservoir 08/10/2001 1,104 acre-feet 0504002 Von Ohlen Reservoir 08/10/2001 1,300 acre-feet 0504000 Kurtz Reservoir 08/10/2001 4,000 acre-feet