FLOOD09467

• County: Garfield
• Community: Carbondale
• Stream Name: Roaring Fork River
• Basin: Colorado Mainstem
• Title: Final Environmental Impact Statement
• Date: 11/12/1981
• Prepared For: EPA
• Prepared By: Highway Department
• Floodplain - Doc Type: Miscellaneous

CS 57-0082-29
Carbondale - East
Final Environmental Impact Statement
Table of Contents

1 - Introduction .......................... 1 C. Ecological Impacts ................. 82
2 - A Description of the Proposed Improvement D, Visual Quality Impacts .............. 86
and its Surroundings ................... 7 E. Social Impacts ..................... 87
A Project Description .................. 9 F, Transportation System Impacts ...... 88
B, Profile of the Area ................... 9 G, Economic Impacts ................. 94
1. Geology....................... 9 H. Land Use Impacts ................. 97
2, Water Resources .............. 15 L Air Quality Impacts.. .. .. .. .. .. .. .... 99
3. Ecology ...................... 15 J, Noise Impacts .................... 100
4. Archaeological Resources ...... 20\ K, Impacts on Archaeologic Resources .101
5, Historical Resources ........... 20 C) L Impacts on Historical Resources .... 101
6. Visual Resources .............. 2t<,10. 5 - Probable Adverse Environmental Effects that
7. Economlc-Prof.'le ............~:r: '. Cannot be Avoided should this Project be
8. Land Use Profile .............. 27~r.- rV:. Implemented ........................ 103
9. Social Profile.................. 32 ,Ct' 6 - The Relationship between Local Short-Term
10, Transportation System ProfiIEP.) Uses of Man's Environment and the
(existing) ..................... 34 Maintenance and Enchancement of Long-
11, Air Quality Profile .............. 41 Term Productivity .....................107
12. Noise Profile .................. 42 7 - Irreversible and Irretrievable Commitments
3 - Alternatives .......................... 43 of Resources ........................ 111
A Do-Nothing Alternative .............. 45 8 - Minimization of Harm ............... 115
B. Up-Valley Mass Transit Alternatives .. 45 9 - Section 4(f) Information ............. 119
C, Alternative S.H. 82 Locations ........ 45 Section 4(f) Statement ................. 227
CDGH Down-Valley Alternatives 45 10- Public Comments on the Draft EIS and atth.e
Alternative 1 A ................. 45 Location Public Hearing .............. 123
Alternative 1 B ................. 45 A, Responses to Comments Resulting from
Alternative 1 C ................. 45 The Circulation of the Draft Environmental
Alternative 10 ................. 45 Impact Statement ................. 125
Alternative 1 E ................. 46 B. Comments on the Corridor Location Public'
Alternative 1 F ................. 47 Hearing - Nov. 22, 1976. at the Basalt High
Halprin Down-Valley Alternatives 47 School ........................... 136
Alternative 20 ... .. .... . . . ... 47 Appendix. . . . . .. . . .. .. . . . . . . .... .. ...... 147
'Photo Essay .................. 48 Exhibit A - Chronology .................... 149,
Alternative 2D-A ............... 73 Exhibit B - Air Quality Study. . . . . . . . . . . . . . .. 153
Alternative 3D .. . . .. . .. .. .. .. 73 Exhibit C - Noise Analysis ................. 203
Alternative 40 . . . . . . . . . . . . . .. 73 Exhibit 0 - Water Quality Analysis .......... 289
Alternative 4D-A . . . . . .. .. . . .. 74 Exhibit E - S tat e His tor i c a ISo c let y
Halprin Up-Valley Alternatives. .. 77 Correspondence .. .. .. . . .. . . . . .. 215
Alternative 1 . . . . . . . . . . . . . . .. 77 Exhibit F - Pitkin County Resolution. . . . . . . .. 219
Alternative 2 . . . . . . . . . . . . . . . .. 77 Exhibit G - Section 4(f) Statement .......... 227
Alternative 3 .................. 77 Exhibit H - Comment Letters (Separate
CDH Up-Valley Alternatives . Document Detached)
Alternative 1 G . . . . . . . . . . . . . .. 77 Exhibit I - April 14. 1981, Location Public Hearing
D. Alternative Recommendations ....... 78 Transcript and Comment Letters
4 - Probable Impacts on the Environment. 79 (Separate Document Detached)
A Geological Assessment ............. 81 Exhibit J - Updated 1980 Annual Average
B. Water Quality and Hydrological Impacts 81 Daily Traffic
Updated 1980 Average Daily
Traffic for Summer Season ..... 275

Figures
Figure 1 -Area Location Map............. 3
Figure 2 - Project Location Map ........... 4
Figure 3 - Recommended Alternative 1 E .... 6
Figure 4 - Four-Lane Divided Highway. .. .. 10
Figure 5 - Four-Lane Parkway with Bike

Trails ......................... 11
Figure 6 - Four-Lane Highway with Transit and
Bike Trails ................... 12
Figure 7 - Two-Lane Improved Highway with
Bike Trails ................... 1 3
Figure 8 - Elevated (Bifurcated) Road Sections
..............................14
Figure 9 - Big Game .................... 16
Figure 10 - Vegetative Communities ........ 18
Figure 11 - Seasonal Variation In the Aspen
Economy (1971) ............... 25
Figure 12 - Future Land Use-Aspen,
Buttermilk ..................... 28
Figure 13-Basalt Master Plan.......,..... 31
Figure 14-1974 Annual Average Daily Traffic 35
Figure 14A- 1980 Annual Average
Daily Traffic ................. 277
Figure 15 - Seasonal Distribution 01 Traffic (24
Hour Volumes) ................ 36
Figure 16-1974 Average Daily Traffic for Summer
Season (Average for three months)37
Figure 16A-1980 Average Daily Traffic for
Summer Season ............. 278
Figure 17 -Distribution of Summer Weekday
Traffic ........................ 38
Figure 18-Distrlbution of Winter Weekday
Traffic ........................ 39
Figure 19 - Comparison of Existing SH 82 Service
Volumes with 1974 Average Summer
Peak Hour Volume ............. 40
Figure 20-Nolse Contour Map............ 42
Figure 21-Alternatives Map .............. 46
Figure 22 -Concept Drawing 01 Four-Lane High-
way with Transit ............... 74
Figure 23-Concept Drawing of two-lane
Improved Highway ............. 75
Figure 24-Concept Drawing of Four-Lane
Parkway ...................... 76

XII