WSP13055

• File Number: 8040.200
• Description: Energy
• State: CO
• Date: 2/1/1982
• Author: Musick and Cope
• Title: Briefing Paper on Critical Water Supply Variables for Energy Development in the Upper Colorado River Basin
• Water Supply Pro - Doc Type: Report/Study

TABLE 4: NOTES

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l. Table 3, Part A, Column 1, supra.

!. See Figure 2.

I. "13(a) Assessment,. Table 3.1. See Appendix 1.

. Ibid., Table 4.2 (Medium Scenario) and Table 5.3 (Baseline Case). See Appendix 1.
Existing plus projected depletions on each tributary divided by the statewide total (2.454 MAF/yr).

'.

I .

Statewide compact entitlement (2.691 MAF/yr) - existing plus projected depletions (2.454 MAF/yr) =
.237 MAF/yr.

1975 mainstem reservoir evaporation (.607 MAFyr) x 90% (for reservoir drawdowns) x 51.75%
(Colorado's percentage entitlement under 1948 Compact) = .283 MAF/yr.

:~ Existing Existing plus projected depletions (2.454 MAF/yr) + remaining compact share (.237 MAF/yr)
mainstem evaporation charge (.283 MAF/yr) = 2.408 MAF/yr.

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Virgin flows leaving Colorado, except for the Gunnison (virgin flow at mouth). See Figure 2.
Bureau of Reclamation estimates reduced by 10% to reflect more realistic flow conditions. Virgin
flow for San Juan based on Bureau estimate at Bluff, Utah. This estimate has been adjusted to
reflect percentage of San Juan drainage in Colorado above this estimation point.