Laserfiche WebLink
Ms. Joanna Williams <br />RE: Combined South Platte SSP Renewal <br />April28, 2005 <br />Page 2 oj6 <br />FULTON DITCH <br />Lafarge owns 25.0 shares in the Fulton Ditch which are recharged into Zigan Reservoir during the <br />irrigation season. The historic consumptive use used for these Fulton Ditch shares remains unchanged <br />from previous submittals to the SEO. These shazes have been used for recharge since the 2001 season. <br />WATER BALANCE AND REPLACEMENTS <br />Two replacement sources are currently included in the plan for Water Year 2005. These include the <br />recharge of 25 Fulton Ditch shares and a lease of reusable effluent from the City of Greeley. <br />Structures Used for Recharge <br />Zigan Reservoir is a reclaimed gravel pit located in Adams County along the South Platte River, slightly <br />northwest of the intersection of Hwy 85 and East 124th Avenue. The reservoir's location is Township 1 <br />South, Range 67 West, Section 35, 6`h P.M. The reservoir has a decreed augmentation plan using Fulton <br />Ditch shares. <br />Water Commissioner Bob Stahl approved the diversion of Lafarge's 25 Fulton shares into the Zigan Pit <br />Reservoir since the 2001 irrigation season. The owners of Zigan Pit Reservoir have maintained monthly <br />diversion records into the reservoir and provided them to the Water Commissioner. <br />Lafarge will follow the Division 1 Recharge Protocol dated October 20, 2004 in the development and <br />administration of this recharge pit. <br />Augmentation by Recharge <br />A recharge model was used to determine the timing of the lagged consumptive use credit from the 25 <br />Fulton Ditch shares as it reached the South Platte River. The model was developed using the following <br />assumption: <br />A SDF of 75 days. Source: Hydrogeologic Characteristics of the Valley-Fill Aquifer in the <br />Brighton Reach of the South Platte River Valley, Colorado. <br />A copy of the recharge model run is provided in Appendix A. <br />Timing of Return Flows <br />The return flow obligations from these Fulton Ditch shares will be maintained by the recharge plan. The <br />full headgate delivery for these 25 shares will be diverted into the Zigan Reservoir each irrigation season. <br />Approximately 49.2 ac-ft represents the volume of consumptive use credit diverted into the reservoir, with <br />a winter return flow requirement of 5.3 ac-ft. Table No. 2 provides the water balance illustrating the <br />recharge of 25 Fulton Ditch shares into Zigan Reservoir. <br />C: I Documents and SettingslDonnaJ Tay[orl Loca(SettingslTemparary Interne[ Fi(es10LK81[tr Lafarge SP Combined SSP 12 28 <br />04.doc <br />