WSPC12502 ‎(2)‎

• File Number: 8220.101.10
• Description: Colorado River Water Projects - Glen Canyon Dam-Lake Powell - Adaptive Management
• State: CO
• Basin: Colorado Mainstem
• Date: 6/10/1998
• Author: Unknown
• Title: Glen Canyon Dam Management Objectives - Draft - 06-10-98
• Water Supply Pro - Doc Type: Report/Study

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15

B.2 - KaDab AmbersDail

MO 14: Sustain populations of Kanab ambersnail wherever they currently exist within the
Colorado River ecosystem.

IN 14.1 Determine specific habitat characteristics required by the KAS. (T&C 3--p.41)

IN 14.2 Determine special flow impacts on Kanab ambersnail to assure that the level
of incidental take is not exceeded. (I. T. - p.40)

IN 14.3 Complete a census of the population and characterize the habitat. Once
habitat requirements are determined, other potential habitat sites within the
Grand Canyon corridor will be surveyed to determine species presence and
recovery potential. (Conservation Recommendation 5--pA3)

IN 14.4 Survey KAS habitat before and after any flow greater than 25,000 cfs to
determine population and its species response to disturbance and ability to
recover. (T &C 4, pA2; and RPM)

IN 14.5 Determine Kanab Ambersnaillife history schedule for populations in the
Colorado River ecosystem. (Conservation Recommendation 5)

IN 14.6 Evaluate and monitor KAS populations within the Colorado River ecosystem.
Determine ecological characteristics susceptible to changes in dam operations,
i.e., population size, habitat needs, life history requirements.

MA 14.1 Protect the habitat necessary for the survival of the existing population of
Kanab ambersnail. (Incidental Take--pAO)

MA 14.2 Do not allow high flows, or a controlled flood, to destroy more than 10% of
the existing KAS occupied habitat in Grand Canyon. (Incidental Take--pAO)

MA 14.3 Develop agreed upon research protocol and conduct research in such a manner
as to minimize disturbance to the KAS population and habitat. (T &C 3--p.41)

MA 1404 Before another BHBF (45,000 cfs or greater), Reclamation will enter into
informal consultation with the U.S. Fish and Wildlife Service and Arizona
Game and Fish Department to:

MA 14Aa evaluate the test flow studies (RPM 2, 1996 BHBF);

Revised 6-10-98