2013-01-10_HYDROLOGY - M1999098 - Laserfiche WebLink

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Jared Dains South Platte Combined Replacement Plan January 9, 2013 Page 12 feet. Assuming a 30% ditch loss and 55% farm efficiency the dry year consumptive use was determined to be 72.2 acre -feet. The other 0.371 shares were historically used to irrigate 72.1 acres at the Haake Property along with 5.75 shares of New Branter Ditch. The property consists of 50% pasture grass and 50% alfalfa. Using a Blaney - Criddle analysis the potential crop consumptive use for the 72.1 acres was determined to be 130.75 acre -feet. Assuming a 30% ditch loss and 55% farm efficiency the dry year consumptive use for the 0.371 Brighton ditch shares was determined to be 46.5 acre -feet. Aggregate will utilize the entire 1.038 shares for use in this plan. The expected credit for the Brighton Ditch shares has been estimated from a dry-year farm headgate delivery (using a 30% ditch loss) of 283 acre -feet per share, or 293 acre -feet for all 1.038 shares. Return flows consist of surface return flows, which are based on current deliveries, and subsurface return flows which are based on the previous year's total deliveries. In 2012, Aggregate delivered only 179 acre -feet of the Brighton Ditch shares because the full yield of the water right was not needed to meet the replacement obligations. The total consumptive use credit in 2013 is projected to equal 153.63 acre -feet, which is greater than the dry -year yield because of the reduced subsurface return flow obligation requirement resulting from low deliveries in 2012. Old Brantner Ditch Aggregate currently has use of 11 shares of Old Brantner Ditch, however they do not propose to utilize those shares in this plan. Bergen Reservoirs 4, 5, & 6 Aggregate acquired shares (estimated to be 191 shares out of the 403.5 total shares) in the Bergen Reservoir from its predecessor, Cooley Gravel Company, however they do not propose to utilize those shares in this plan. Last Chance Ditch Company No. 2 Aggregate acquired 0.3154 shares (certificate nos. 248 & 251) in the Last Chance Ditch Company No. 2 from its predecessor, Cooley Gravel Company, however they do not propose to utilize those shares in this plan. Lupton Bottom Seep Ditches No. 1 and No. 2 Aggregate acquired 100% ownership of the Lupton Bottom Seep Ditches No. 1 and No. 2 from the Lupton Bottom Ditch Company, however they do not propose to utilize this source in this plan. Huett Seepage Ditch Aggregate acquired 100% ownership of the Huett Seepage Ditch from its predecessor, CAMAS Colorado, however they do not propose to utilize this source in this plan. Dewatering Credit All sites that are currently dewatering have been equipped with a Totalizing Flow Meter ( "TFM ") to measure the dewatering discharge, with the exception to the Distel Pit which will have a TFM in place prior to discharge to the St. Vrain Creek resumes. Monthly dewatering volumes must be recorded monthly with the meter readings included on submitted accounting. As long as dewatering operations remain continual at constant rates the net accretions are assumed to offset any lagged depletions. Under this assumption, the Applicant is not claiming any dewatering credit. Once dewatering operations stop, or are significantly reduced, at specific sites the monthly meter readings will be used to analyze post pumping depletions.