WSP03526

• File Number: 8220.101.10.E
• Description: Glen Canyon Dam/Lake Powell
• State: AZ
• Basin: Colorado Mainstem
• Date: 11/1/1989
• Author: USDOI-USFWS
• Title: Kanab Ambersnail Recovery Plan
• Water Supply Pro - Doc Type: Biological Opinion

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The National Park Service must consult with the Service under

Section 7 of the Act for any activity which may adversely affect
the Kanab ambersnail. including recreation.

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At present recreational use on the habitat Kanab ambersnail at
Vaseys Paradise in the Park is occurring. Recreation limits.
however. are near saturation for use of the Colorado River

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corridor through the Grand Canyon. Numbers of recreationists
using this area are monitored and regulated by the National Park
Service and are unlikely to increase significantly. However, use
of the area around Vasey's Paradise may increase due the area's
great natural beauty and the presence of large Quantities of
fresh drinkable water. Poison Ivy. common to the site, however.
serves as a barrier dissuading many recreationists from degrading
the species occupied habitat.

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Areas at Vasey's Paradise within the gorge of the Grand Canyon

with populations of Kanab ambersnail should be designated as a

Kanab ambersnail conservation area and closed to recreational

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activities which would adversely affect the Kanab ambersnail and
its habitat. This action is necessary to protect a viable
population of the species at this spring fed wetland area. The

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lJ~tionolf>ork:5er'vlce wlll be responslble for monitoring the

Kanab ambersnail conservation area within the Grand Canyon
National Park to ins~re that no unauthorized use of the
conservation area is taking place.

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