WSP07923

• File Number: 8220.101.10.E
• Description: Glen Canyon Dam/Lake Powell
• State: AZ
• Basin: Colorado Mainstem
• Date: 4/1/1998
• Author: Sorensen/et al. - Ar
• Title: Monitoring and Habitat Surveys of the Endangered Kanab Ambersnail in Grand Canyon and Northern Arizona
• Water Supply Pro - Doc Type: Report/Study

FIGURES

Fig. 1. Locations of Vaseys Paradise and potential establishment sites for Kanab ambersnail in

Grand Canyon, Arizona . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

TABLES

Table 1. Kanab ambersnail suitable habitat correlation model .................... 4
Table 2. Kanab ambersnail habitat distribution at Vaseys Paradise, 1995-97 . . . . . . . . . . . 5
Table 3. Habitat suitability for KAS establishment at river corridor sites in Grand Canyon
National Park, June 1996 to October 1997 ........................... 7
Table 4. Habitat suitability for KAS establishment at backcountry sites in Grand Canyon National
Park and northern Arizona, June 1996 to October 1997 ................... 7

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APPENDIXES

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Appendix A. Site summaries for KAS habitat evaluations. ..................... 15

Site: Dripping Spring ............................................ 15
Site: Travertine Canyon Seep ....................................... 16

Site: Travertine Falls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 17
Site: Bridge Canyon Creek . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 18
Site: Spencer Canyon confluence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 19
Site: Columbine Falls ............................................20
Site: Verde River corridor ......................................... 21
Site: Verde River "Cold Spring" ..................................... 22
Site: Snake Gulch Willow Spring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Site: Snake GulchWildband Spring ...................................24
Site: Snake Gulch Pigeon Spring ............... . . . . . . . . . . . . . . . . . . . . . . 25

Site: Burro Spring .............................................. 26

Site: TwomileSeep. .............................................27
Site: Clear Water Spring .......................................... 28

Site: Badger Spring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Site: Lower Twin Spring .......................................... 30

Site: Montezuma Well . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

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