PUB00053

• Year: 1999
• Title: Metropolitian Water Supply Investigation Final Report
• Author: Hydrosphere Resource Consultants
• Description: Metropolitian Water Supply Investigation Final Report
• Publications - Doc Type: Water Resource Studies

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Metropolitan Water Supply Investigation

MWSI Results

Figure 6: Blue River Below Dillon Reservoir

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D Recent History
(1987'1996)

. Denver's Near
Term Strategy
(1947-1991)

D Near Term Plus
Conjunctive Use
(Scenario 9)

~'
.
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. Near Term Plus
Conjunctive Use
(Scenario 10)

oct nov dec jan feb mar apr may jun jul aug sep

The example conjunctive use plan would also increase stream flows in reaches conveying
water diverted from the Blue River and water "borrowed" from Denver's reservoirs.
Stream flows in the South Platte below Cheesman would generally increase during the
August through April period in most years while stream flows in the North Fork South
Platte below Grant would generally increase year round. There would be considerable
flexibility as to when these flow increases could occur. This would allow for flow
management to address fishery and recreational needs in the augmented reaches.

Endanaered Soecies

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There could be endangered species concerns related to the surface water depletions in
both the South Platte and Colorado River basins would occur as part of a conjunctive use
project These would be similar in nature to surface water depletions that would result
from a new surface water storage project Cooperative agreements are in place in both
basins to address the needs of the endangered species while allowing for continued
development of water resources in Colorado.

Effects on Reservoir Recreational Levels

Conjunctive use plans involving borrowing arrangements with Denver would result in an
overall decrease in storage in Denver's reservoirs on a year round basis, This decrease

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Prepared for the Colorado Water Conservation Board. Colorado Department of Narura] Resources by
Hydrosphere Resource Consuilants. 1002 Walnut Street, Suite 200, Boulder, CO 80302