WSP06750

• File Number: 8200.765
• Description: White River General
• State: CO
• Basin: Yampa/White
• Water Division: 6
• Date: 9/1/1996
• Author: USFS
• Title: Aspen Highlands Ski Area - Draft Environmental Impact Statement
• Water Supply Pro - Doc Type: Report/Study

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Aspen Highlands Ski Area Geologic Hazards. .................................... 3-5
Properties of Soil Map Units at Aspen Highlands (after Irvine. 1993). ............... 3-10
Characteristics of thefour climatic zones at Aspen Highlands. .. . . . . . . . . . . . . . . . . . . .. 3-15
Average flow rates recorded between 1969 and 1991 at gauging stations on Maroon

Creek and Castle Creek ................................................. 3-15
Current acreages of development. ........... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-17
Potential water yield (acre-feet) at Aspen Highlands under current conditions. ......... 3-17
Acreage and percentage of each vegetation cover type within the analysis area. . . . . . . . .. 3-25
Vegetation types and acreages comprising the Aspen Highlands regional area. ......... 3-28
Comparison of skier numbers and size and type of ski terrain. . . . . . . . . . . . . . . . . . . . . .. 3-48
Total number of skiers per year in each ski area in Pitkin County ;.................. 3-49
Areas of total terrain. skiable terrain, and different types of skiable terrain by geographic

location .............................................................. 3-50
Ski lift specifications, skiable area serviced by each lift, and terrain and lift capacities ... 3-51
Resident population of Pitkin County, 1900-1993. ............................... 3-57
Estimated peak population of Pitkin County in 1992 and projected estimates in 1995. ... 3-58
Total number of skiers per year in Pitkin County . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-58
Comparison of historic jobs and labor force in Pitkin County. ...................... 3-59
National Ambient Air Quality Standards (using reference or equivalent methods). ...... 3-68
Prevention of Significant Deterioration of Air Quality Standards .................... 3-69

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Figure 3.1. Geological characteristics of Aspen Highlands..................................... 3-2
Figure 3.2. Geological hazards at Aspen Highlands .......................................... 3-4
Figure 3.3. Soil units found at Aspen Highlands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-9
Figure 3.4. Location of composite watersheds and analyzed hydrographic areas. .................. 3-14
Figure 3.5. Analysis area showing vegetation cover type and wetlands .......................... 3-23
Figure3.6. Potential brownie lady-slipper habitat. .......................................... 3-26
Figure 3.7. Regional area vegetation types ................................................ 3-27
Figure 3.8. Distribution of bighorn sheep ranges in the vicinity of the four ski areas. ............... 3-38
Figure 3.9. Key roadways, intersections and existing peak traffic volumes. . . . . .. . . . . . . . . . . . . . . . .. 3-66
Figure 3.10. Area map of viewpoints analyzed ............................................. 3-74
Figure 3.11. Aspen Mountain sundeck viewpoint (l}-existing conditions. . . . . . . . . . . . . . . . . . . . . .. 3-76
Figure 3.12. Highway 82 viewpoint (5}-existing conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-78
Figure 3.13. Existing land use at Aspen Highlands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-80

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