WSP04713

• File Number: 8240.200.48.D.3
• Description: Wolford Mountain
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 2/7/1990
• Title: Wolford Mountain Biological Opinion - ‎(Muddy Creek)‎
• Water Supply Pro - Doc Type: Publication

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The third level of analysis is a simulation of the environmental baseline.
Work.ing frOll the present modified condition development scenario, the
environmental baseline was created by imposing the operational studies of
projects that have previously undergone Section 7 consultation, but are not yet
operating, in the existing condition baseline. Table 2 displays all projects
and depletions included in the environmental baseline for the Muddy Creek
project analysis.

The fourth level of analysis incorporates a net average annual depletion of
7.716 acre-feet attributable to the MUddy Creek project as described in the
Biological Assessment and supplemental data. The model was then reoperated to
create a new baseline flow condition which was utilized to evaluate flow changes
in the 15-mile reach, due to the Muddy Creek project. These data are displayed
in Table 3 with additional details on depletions and the extension of the record
presented in Appendix A.

Table 1 below compares the changes in flow at Cameo and the 15-mile reach.

TABLE 1. Changes in flow at Cameo and the 15-mi 1 e reach for the period of
record 1952 to 1982.
----------------------------------------------------------------------------
COLORADO RIVER AT CAMEO * COLORADO RIVER AT PALISADE
AVERAGE YEAR * AVERAGE YEAR
KAF * KAF
*
ENV I RONHEITAl MUDOY CREEK * ENVIRONMENTAL MUDDY CREEK
BASELINE CHANG E PROJECT * BASELINE CHANGE PROJECT
------------------------------ * ------------------------------
JAH 91.0 0.1 91.1 * 93.0 0.1 93.1
FEB 72.4 0.1 72.5 * 74.5 0.1 74.6
MAR 80.1 0.1 80.2 * 79.7 0.1 79.8
APR 148.0 -0.3 147.7 * 101. 8 -0.3 101.4
MAY 362.8 -1.1 355.7 * 296.1 -7.1 289.0
JUNE 555.3 -3.7 551.6 * 486.7 -3.7 483.0
JULY 293.4 1.1 294.1 * 199.3 0.0 199.3
AUG 156.2 1.4 157.7 * 62.0 0.0 62.0
SEP 123.2 0.0 123.2 * 42.5 0.0 42.5
OCT 125.5 0.2 125.7 * 63.1 0.2 63.2
NOV 108.2 0.2 108.4 * 113.0 0.2 113.2
DEe 96.6 0.2 96.8 * 100.0 0.2 100.2
TOT 2212.8 -7.6 2205.2 * 1711. 5 -7.7 1703.8
Values are subject to 1 plus or minus 1 KAF rounding error
KAF = Thousand acre-feet