8031

• UCREFRP Catalog Number: 8031
• Author: U.S. Department of the Interior.
• Title: Fish and Wildlife Service Final Biological and Conference Opinion on Lower Colorado River Operations and Maintenance - Lake Mead to Southerly International Boundary.
• USFW Year: 1997.
• USFW - Doc Type: \
• Copyright Material: NO

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BIOLOGICAL OPINION

Proposed Action

Biological
Operation and Reclamation Non-Discretion Reclamation Discretion Assessment
Maintenance Activity Reference
(Pages)
containing flows (1) required to prevent flooding and (1) discretion over method of 56,60,74
outside of reservoirs convey water to meet water orders conveying water and achieving
flood control
maintaining river (1) required if needed to control (1) discretion over method of 34,56,60,7
channel and related flooding, deliver water, and maintaining facilities 4
structures maintain navigability
operating quarries (1) required if needed to control (1) discretion over location of 34,56,74
flooding and deliver water quarries
(2) stockpiling enables
discretion over timing of
quarrying
maintaining dams (1) required for flood control and (1) maintenance method 31-32
and related structures hydropower discretionary
operating Yuma (1) desired to offset cost of facility (1) discretionary 34,49,60,
desalting plant at 74
one-third capacity
delivering water to (1) water deliveries negotiated with (1) discretion over percent of
Mexico at San Luis, Mexico through IBWC Mexico's allotment if approved 28,72
Mexico, including by IBWC
operating 242 well (2) discretion over operation
field and maintenance of well field
dredging at Imperial (1) required to enable meeting (1) discretion over timing and 60,74
Dam and at Laguna water deliveries at Imperial Dam method
Settling Basin and SIB

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