Substitute Water Supply Plan Forum September 1 2004

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6 15.44-. The historical consumptive use credit may be assigned to precipitation or ground water. The amount of consumptive use credit from precipitation and ground water during the growing season cannot exceed the total potential consumptive use of the native vegetation. No benefit is given for excess consumptive use credits. The net depletion will be calculated as gross evaporation minus historical consumptive use. The historical consumptive use for non - irrigated native sites without phreatophytes or subirrigation is equal to the effective precipitation, which is equal to 70% of total precipitation for each month. Higher maximum effective precipitation amounts must be supported with engineering documentation. The maximum effective precipitation must be adjusted accordingly for sites with historical irrigation or subirrigation. 16. For avel pits that are lined in accordance with the State Engineer's Lining Criteria, the Mlicant must replace depletions from all water consumed within the lined area except for the water removed in product. 17. In accordance with the State Engineer's Office Policy 2004 -3, phreatophyte credit, including effective precipitation, cannot be claimed for an off channel lined gravel pit which is used as a storage reservoir. 18. Plans approved for sand and gravel mining_ operations cannot be used to replace depletions that occur from uses that are not directly related to the mining operation. The plan cannot replace depletions from uses that occur outside the mining permit boundarL unless the applicant can show to the satisfaction of the State Engineer's Office that the use is directly related to the gravel mining operation. REPLACEMENT SOURCES 19.4121- Replacement water to compensate out -of- priority depletions must be available either directly or by exchange in the proper quantity, quality, place and time to insure that existing water rights are not injured. All plans, whether- the pit has ° se • ater- ^ a , submitted to this office will be required to have concurrent replacement water available in order to obtain approval from the State Engineer. 20.E Plans for replacement generally utilize #wee -four primary sources of water to compensate the stream system for depletions resulting from evaporation and mining losses. These sources include direct flow water rights, reservoir storage, nontributary and transbasin water, and leased reusable effluent. Water right decrees and other pertinent information regarding the replacement sources shall be included. The applicant shall also provide signed lease agreements or recorded non - encumbered ownership documents authorizing use of the proposed replacement sources. Although the substitute water supply plan may be approved on a temporary basis using leased or nontributary water for the replacement water, this office may object to the use of these sources in a proposed decreed plan for augmentation. The decision to accept these sources as adequate to protect the senior water rights may be determined by the Water Court in which the plan is filed.