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<br />iJ) t<>n,,;1- M"'-' Grand Valle a er Man ement Study December 19, 1994
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<br />The purpose ef the study is to quantify water that ceuld be salvaged from e~eratie ~s~ ~
<br />are currently diverted by the Grand Valley Project and returned to the Celerade Rirer through
<br />project wasteways. Under current eperatien approximately 59,000 acre-feet 'ire- annua11y.
<br />divertC:'t'from the Celerade River and returned as eperatienal spills. With current levels ef
<br />techne1egy, it is estimated that a pertien ef these spills ceuld be eliminated. The purpose this rF~"-l,.,o"",\
<br />?f'\\ water serves is to' maintain an adequate canal water surface elevatien to ~yidc water deliveries
<br />to the adjacent high lands, The study cencept includes analysis ef the structural changes
<br />necessary to permit the reductien ef eperatienal spills occurring in the Grand Valley Project by
<br />maintaining the water surface elevation with structural modificatiens rather than eperatienal
<br />spills. By reducing the velume ef eperatienal spills through the use ef check structures,
<br />automated control systems, and in-system sterage less water is required to' be diverted from the
<br />Celerade River.
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<br />By reducing the diversien requirement several river administratien epportumtIes are..:made
<br />available to"adtlress the fellewing problems:
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<br />1) The Celerade River belew the Grand Valley Project (GVP) diversien dam is habitat
<br />to' feur endangered fish species; the Celerade squawfish, humpback chub, razorback
<br />sucker, and benytail chub. The reach ef Celerade River frem the Grand Valley
<br />Irrigatien Cempany (GVIC) diversien dam to' the confluence ef the Celerade and
<br />Gunnisen Rivers is called the 15-Mile Reacb (Reach). The Recevery Implementatien
<br />Program (Recevery Program) fer Endangered Fish Species in the Upper Celerade River
<br />Basin has identified this reach ef the river as critical habitat and recemmended
<br />700 - 1,2001 cubic feet per secend (cfs) as a minimum flew regime for the recovery ef
<br />the feur endangered fish species. Flews in this reach ef the river frequently fall be1ew
<br />700 cfs in the mid- to' Iate- summer peried. By reducing the diversien requirement, mere
<br />water ceuld be maintained in the Reach fer the benefit ef the endangered fish species.
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<br />2) A portien ef the Grand Valley Project diversiens are supported by direct flews and
<br />storage releases from Green Meuntain Reserveir (GMR). By reducing the diversien
<br />requirement, mere water ceuld be retained in GMR:
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<br />Terminele!!,y ef Silmificance
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<br />Censerved water - A great deal ef aggravation, consternatien and grey hair has occurred
<br />regarding the "proper" terminolegy applied to' the water which ceuld be made available as a
<br />result efthis study and improvement efferts. The terms "saved", "conserved", and "salvaged"
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<br />1 Flew recemmendatiens are under revisien. The 700, 1,200 cfs flew recemmendation has
<br />been accepted by the State ef Celerade and will be used in this repert.
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