Dec 21 2012
UT: Beryl Enterprise groundwater plan set
Utah State Engineer Kent Jones on December 21 adopted a new groundwater management plan for the large Beryl Enterprise area in the southern part of the state, located mostly in Iron County, to the west of Cedar City and just east of the Nevada border.
“The objectives of this groundwater management plan are to limit the
groundwater withdrawals to safe yield, protect the physical integrity of the aquifer, and protect water quality. The intent of this plan is to provide specific management guidelines for this area under the statutory provisions within Section 73-5-15 of the Utah Code,” he said in explanation. “The safe yield for the groundwater basin has been determined to be approximately 34,000 acre-
feet per year. The current average depletion from the groundwater system is estimated at approximately 65,000 acre-feet per year. The total reduction needed to return the withdrawals to safe yield is estimated as 31,000 acre-feet per year of depletion. The groundwater withdrawals in this area have for over 40 years consistently exceeded the safe yield of the aquifer making this a critical management area as defined in section 73-5-15 of the Utah Code.”
From the planning document:
“For purposes of the groundwater management plan annual depletions from irrigation will be calculated using an annual crop survey prepared by the distribution system commissioner. The crop survey will tabulate irrigated acres for every crop type in the management plan boundary. It will include acreage supplied by both surface and underground sources. The crop survey will be published every year in the “Beryl Enterprise Water Distribution System Annual Water Report.”
“The total depletion from irrigation will be calculated by multiplying the number of acres of crops irrigated by the estimated crop consumptive use values from the Enterprise/Beryl Junc. Station published in “Consumptive Use of Irrigated Crops in Utah, Research Report 145.” The State Engineer will consider the use of scientifically verified studies that provide more accurate crop consumptive use values. Any reduction in use by either a decrease in acres or through the irrigation of less consumptive crops will be accounted for as a reduction from the total depletion. The baseline for irrigation from which future reductions will be calculated is the amount of irrigation from 2012, 29,278 acres, multiplied by the consumptive use value for alfalfa, 2.4925 feet, which equals 72,975 acre-feet. This baseline accounts for acreage supplied by both surface and underground sources. …
“If there are reductions in irrigation because water use is changed to new use through the application process, then the baseline for irrigation will be adjusted to reflect the decrease in irrigation rather than the decrease in depletion. If a decrease in depletion from the system results from the change application then this decrease will be accounted for by the State Engineer. Accounting procedures adopted under this plan for decreasing the irrigation depletion by growing less water consumptive crops may not be construed to authorize acreage to be expanded under a water right. The procedures are applicable only as a groundwater management tool in the Beryl Enterprise basin.”



