Record Details
page 3-132
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page 3-132 Final environmental impact statement on the Wasatch County Water Efficiency Project and Daniel Replacement Project, page 3-132 |
| Coverage | Electronic reproduction; |
| Format | 3-132 text/PDF |
| Rights | Brigham Young University; http://lib.byu.edu/about/copyright/generic.php Public Domain Public |
| Language | English; eng; en |
| Relation | Central Utah Project; Western Waters Digital Library; comment letter no 23 the lowered average storage levels are the result of changes in the timing of storage and release of water from the reservoirs under the proposed action the proposed action would increase the efficiency of water use in heber valley thus reducing diversion requirements and conserving water in the valley however the ability to store conserved water in jordanelle Jor danelle reservoir is limited because the conserved water would be available during the months of high runoff and storage levels this storage limitation along with a change in timing of return flows from the heber valley groundwater basin wouldcause would cause the proposed action to lower jordanelle Jor danelle reservoir levels compared to baseline conditions there would be an increase in flow in the provo river between jordanelle danelle Jor and deer creek reservoirs under the proposed action during the spang spring and early summer as compared to baseline because of a reduction in diversion from the provo river compared to baseline conditions the return flows from the heber valley groundwater basin under the proposed action would be less during the summer and fall when demands are at their highest downstream of deer creek reservoir additional releases from jordanelle Jor danelle reservoir would be required during the summer and fall under the proposed action to avoid reductions in deliveries to downstream users and to meet water right storage requirements in deer creek reservoir under the bonneville unit mai mal system final supplement to final environmental statement USBR 1987 both reservoirs were expected to be drawn down to their minimum pool levels a combined system storage of 6000 acre feet during an extended critically dry period modeled jordanelle Jor danelle reservoir water levels are within the range identified in the mai mal final supplement su P plement clement pl ement reductions in CUP agricultural deliveries would occur during critical periods to allow greater use of reservoir storage during noncritical non critical periods 3263.6 32636 32636 groundwater resources me the tho following subsections describe impacts on groundwater resources under the proposed action 326361 32636.1 groundwater recharge and discharge the proposed action would reduce groundwater recharge from baseline in hebervalley heber valley vailey by an annual average of about 20 perment percent or I 1 18759 acre feet per year see table 315 3 15 this ibis would be caused by a reduction in applied irrigation water which would reduce the amount of water that would percolate into the aquifer about 20 percent less groundwater would return to the surface as discharge the topsl totsl groundwater discharge in the valley would be rod rol redila redilj on an annual average basis but discharge would increase locally in the summer from supplem suppled supplements instream in stream flow seepage and additional daniels danieli cw b channel seepage groundwater basin discharge di scharg w be reduced throughout the valley from I 1 percent perceatj snake creek return flows to 39 percent local drains and seeps not n ot associated with hillside outflow during wet years recharge and discharge would bei bet reduced by 20 percent on an annual average basaj baswj baski basli 19500 acre feet per year under the proposed ropos action I 1 annual abriualdry dry year ye ar discharge would be reduced re d UC to about 15600 acre acri feet J i As shown in figure 33 3 3 in section 3263.4 32634 32634 to total inflow to deer creek reservoir is about the sa same under the proposed action as under baseline conditions this is because the reduction in 1 groundwater return flow is offset by a comparable increase in surface flow from streams receiving supplemental water and an incre iacre increase ase in undiverted provo river flow a the annual average groundwater discharge to sarn sprn S creek and the upper charleston and sagebrush am spring creek canals would be about 39 percent lows k under the proposed action than discharge to the theiflg areas under baseline conditions the increase in ing lag inf f discharge to these areas under baseline conditions 1 was modeled to be about 12 percent higher than existing conditions the decrease in discharge to these areas under the proposed action would thus thiac thiaj about 33 percent lower than existing conditions c onditi ons oas f 326362 326562 326162 326562 32656.2 3261.62 groundwater levels the pr proposed oposed opposed action would lower groundwater levels in some area of ofheber heber valley the greatest change in in groundwater levels up to 60 feet lower than basel basely conditions 42 feet lower than existing condition 4 0 o are expected in the southeast portion of the yahsu yahsy v see map 35 3 5 this change would occur under tic a timpanogos Timpano gos irrigation company where water ley lev lead levd are currently 100 to 150 feet deep groundwater levels in the agricultural areas north and west of at 1t heber city and southeast of spring creek would t bout out 2 to 8 feet lower than under base baseline linc conditions the seasonal fluctuation in groundwater levelsw levels wooi wool be more subdued than under baseline conditions because less water would be applied d during wing i summer 1 W wa w3 344 3 44 page 2 of 2 3132 3 132 |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/3587 |
