WSPC12741

• File Number: 8064.200.A
• Description: Indian Water Rights - Gallup-Navajo
• Date: 9/3/2004
• Author: USDOI/BOR
• Title: Biological Assessment, Navajo Gallup Water Supply Project - Report and Appendices
• Water Supply Pro - Doc Type: Publication

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recommendations to be met. The depletions associated with full development of this project are
summarized in Table 3.4

3.2.2.1 Full NGWSP Development plus Baseline Depletion

The full NGWSP depletion of 35,893 acre. feet per year was included in the model with the
haseline depletions described in Section 3.2.1. The summary of flow statistics resulting from
this configuration appears in Table 3.5. Several of the flow statistics required under the SJRIP
flow recommendations (see Table 3.1) cannot be met and the project waler deliveries are shened
in 1956 to prevent the water level from dropping below the allowed elevation. The minimum
flow requirement is also violated in 1956.

3.2.2.2 JicariJIa Apache Nation Portion of NGWSP plus Baseline Depletion
The model to represent the Jicarilla Apache Nation portion of the NGWSP used Ihe depletion
baseline discussed above. To this was added the operation of just the Jicarilla Apache Nation
and city of Gallup demands. IOtaling 8,700 acre-feet of depletion. This consisls of the 6,570 acre
feet of depletion included in the baseline from the JANNRWSP consultation, 290 acre-feet of
Jicarilla Apache Nation historical depletion currently in the baseline plus 1.840 acre. feet of new
depletion. The result is an increase in baseline depletion of 02%.

All flow recommendations are met wilh this configuration as shown in Table 3.6 (see Table 3.1
for comparison). There is a slight change necessary in the operaling rules of the dam to meel
flow recommendations for this configuration. To meet all flow recommendations, the minimum
June release is set to 260 cfs rather than 250 cfs to pick up one additional year of the 2,500 cfs
statislic (without Ihe adjustmenl, the statistic is missed by 8 cfs for 1 day). All other months are
set 10 250 cfs. The condition was implemented during 18 of the 65 years. The other years are
either already higher to meet downstream demands or a peak release is made. Alternately, to cfs
could be released down Gallegns Canyon (RM 187) or Ojo Amarillo (RM 170) from the NIlP
canal to meet these conditions if modificalion of an operating rule is problematic. Details of the
reservoir COnlent and flow slalistics are in Appendix A. This analysis demonstrates that this
ponion of the project can be developed while satisfying the flow recommendations. Since it is
not proposed to operale the project in this manner, no modifications of the operating rules are
required. This analysis is simply to represenl that the Jicarilla and Gallup demands can be met
within Jicarilla water rights, while meeting the flow recommendations.

Table 3.4 Summary of Depletions for Full NGWSP Development

In Baseline New Met wi unused Total
Water Right Holder (changed use) Depletion baseline depletion 12 Depletion
ac-ft ac-tt ac-tt ac-tt
JicariUa Apache Nation 6.86013 1,840 8,700
Navajo Nation 27,193 27,193
NGWSP Total 6,860 1,840 27,193 35,893

12 See Section 322.3 for descriplion of deplelion guanmtce procedures.
I3lncludes 290 acre-feel from unused hislOrical rights and 6.570 acre-feet from the JANNRWSP.
BIOLOGICAL ASSESSMENT
NAVAJO GAllUP WATER SUPPLY PROJECT
September 3. 2004

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