WSP06915

• File Number: 8240.200.43.H.2
• Description: Grand Valley/Orchard Mesa -
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 7/25/1988
• Title: Operation of Checkbacks - 1977 Daily Model
• Water Supply Pro - Doc Type: Data

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33A Dillon Reservoir Release fQI: Replacement for
Colorado Sprinqs. Historic data transcribed
from USBR. No replacement releases for Colorad~ v
Springs were made during the study period.

34

35

36

37

38

38A

38B-H

Dillon Reservoir Additional Storaqe Release to
River. Historic data transcribed from USBR. ,/

Colorado Sprinqs Net Depletion Under 1948
Riqht. Historic data transcribed from US BR. v/

Colorado Sprinqs Net Depletion !lY Homestake
Pro;ect. Historic data transcribed from US BR. ;/

Total stream Depletion
.4,.2,.2,.!!,~,26,28,35 and 36].
from us BR.

[Sum of Col.
Data transcribed ~/

Undepleted Flow at Dotsero Adiusted for One Day
Travel Time [Col. J.+37]. Data transcribed from
US BR. Represents theoretical flow at Dotsero
without major depletion sources in operation.

./

~ Slone Senate Document 80 Release from Green
Mountain Reservoir and Williams Fork Reservoir.
Includes natural flow shortage releases from the
two reservoirs and power releases from Green
Mountain for the period June 30-July 10.

b:;;00 ,,\

,.."--'

l<---'..'. ~,

Evaporation Assessment at Upper Basin
Reservoirs. Rat-es and schedules from Division 5"
Engineer. Releases to compensate for
out-of-priority depletions attributed to
reservoir evaporation were assumed necessary
when the adjusted historic discharge at Dotsero
[Col. 3] fell below a senior power demand rate.
Releases from Dillon Reservoir would b<e
triggered by a flow at Dotsero of less than
2,792 af/day (1,408 cfst. All other reservoil"tS
w.ere impacted only by a Dotsero flow of less
than 2,479 af/day (1,250 cfs). Because
reservoir evaporation was not administered in
1977-78, these depletions occurred to the river
system and were not replaced by appropriate
releases.