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Sievers Pit M-77-098 SWSP, Oldcastle SW Group, Inc. Page 8 of 13 <br /> September 30, 2025 <br /> Oldcastle will replace all lagged depletions created by expanded mining activity at the <br /> Sievers Pit during the worst-case downstream scenario for the Cameo Call, with the call <br /> period running from April through November of each year (Table 3), using a combination of <br /> consumptive use credit from the dry-up of irrigated lands of the Kaiser-Sievers Ditch as <br /> decreed in Case No. 83CW65 and a lease with WDWCD. <br /> Pursuant to Case No. 83CW65, a total of 22.1 acres of historically irrigated lands have been <br /> dried up as a result of the gravel mining operation, resulting in a consumptive use credit of <br /> 32.5 acre-feet during the May 5t" through October 10t" time period. These credits are not <br /> sufficient to replace the increased depletions from the Sievers Pit under this SWSP, <br /> therefore the remaining replacements will be provided by releases from WDWCD totaling 6.0 <br /> acre-feet per year (Table 3). These releases include a 10% transit loss. The Applicant <br /> currently has a perpetual lease of 29.1 acre-feet per year with the WDWCD under Contract <br /> No. 090521 LW(a), attached. The Applicant has obtained a new WDWCD lease for 6.0 acre- <br /> feet annually upon approval of this SWSP. The sources of replacement water from WDWCD <br /> have been identified as Ruedi Reservoir, Green Mountain Reservoir, Alsbury Reservoir, or <br /> other sources available to the District. <br /> The attached "Sievers Gravel Pit Water Balance" table shows that total proposed lagged <br /> depletions at the pit are 31.07 acre-feet, which exceeds the 26.1 acre-feet of depletions <br /> contemplated in the 83CW65 decree. The water balance indicates that the 32.50 acre-feet <br /> of HCU credits from 83CW65 and 6.0 acre-feet of WDWCD water, accounting for the <br /> projected call scenario, are sufficient to replace all out-of-priority depletions at the pit. <br /> Conditions of Approval <br /> This SWSP is hereby approved in accordance with section 37-90-137(11), C.R.S., subject to <br /> the following conditions: <br /> 1. This SWSP is approved with the effective date of July 1, 2025, and shall be valid <br /> through June 30, 2027, unless otherwise revoked. If this plan will not be made <br /> absolute by a water court action by the plan's expiration date, a renewal request <br />