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January 2004 ii 3A 7 Transportation ............. ............ .. .. ... ... ........... ................ .............52 ~ 3A.7.1 Existing Conditions ........ ... .. ... .... ........ .... ......... .. .............. 52 3A.7 2 Environmental Consequences .. ............................... ...............52 3A.7.3 Management and Mitigation Measures . ............................... ...............54 3A 8 Air Quality . .... ....................... .. ....... .............................. .............54 3A.8.1 Existing Conditions ... .......... .. ............... .......................... ... .........54 3A.8.2 Environmental Consequences ....... ................... ............... ...............55 3A.8.3 Management and Mitigation Measures .................................. .. ............. 57 3A 9 Noise .......... .. ..... ........... ...... .... ..... .. .. .. ... ............58 3A.9.1 Existing Conditions ........ ............ ....... .. ............... ......... ................58 3A.9 2 Environmental Consequences .. ... .. ......... .................. ........... ..58 3A.9.3 Management and Mitigation Measures .. ............... .... ......... .... .......59 3A 10 Socioeconomics . ....... ..... ........ ..... ........ ................... ............59 ' 3A.10.1 Existing Conditions .... .... .. .. ............. ........ ........ ..59 ' 3A.10 2 Environmental Consequences ..... ..... ........... ............ ............ ...........60 3A.10.3 Management and Mitigation Measures ............ ........ ............ .............60 3A 11 Cultural Resources ........ ......... .... .. .. ........................... .... .... ....... 61 1 3A.11 1 Existing Conditions ........................... ...... .............. ...... .... ....... ....61 3A.11 2 Environmental Consequences ....... ........................ .............. .............61 3A.11.3 Management and Mitigation Measures ............................ ........... ...............61 3A.12 Short Term Use Versus Long Term Productivity ................................... ................61 Chapter 1 B -Purpose and Need ............................................................................ ................63 1B 1 Introduction and Background ............ .......... ........................ ............. ............ ..63 16.2 Purpose of and Need for Proposed Action ............................................ .. .........63 + 1 B 3 Project Schedule .... ............................. ........................... . .......... .. ...........63 1 B 4 Decisions to be Made by Forest Service Responsible Official ................... ...............63 ~ Chapter 26 -Alternatives .......................................................................................................ti4 2B.1 Introduction ................................................. ........................................ .. ............64 2B.2 Public Involvement .. .................. .................................... .............. .... .......64 2B.3 Issues and Concerns ...... ................ ....... ........................................... ..............64 2B.3 1 Issues Not Carried Forward for Detailed Analysis ................ ........... ...............65 26.4 Proposed Action Alternative .............................................. .............. ...... .......66 2B.5 No Action Alternative ...................... ....... ................ .................. ...............67 26.6 Comparison of the Alternatives Considered in Detail ................................ ...............68 Chapter 3B -Affected Environment and Environmental Consequences ...........................70 3B.1 Introduction ................................. .......................... ... ..... . ..............70 36 2 Geology and Geologic Hazards ....... ..... .... ............... ............... . ............70 38 2 1 Existing Conditions .... ...................... ..... ... ..... ........... ...............70 36.2 2 Environmental Consequences . ........................ ...... ........... ...............71 3B 2.3 Management and Mitigation Measures ............. .......... ............ ...........72 3B 3 Water Resources .......... ............... ........ ..... ...... ....... ...... .............. 72 3B 3 1 Existing Conditions . ............ . ........ ............ .......... .... ..... ..72 3B 3 2 Environmental Consequences .......... ... ... ..... .. ......... . .............. 73 3B 3 3 Management and Mitigation Measures ............... ..... ... ... . ............74 38.4 Vegetation .. ........ .. .. ........... .. .. .. ...... ....... .... ........74 36 4.1 Existing Conditions ....... .. ... .... ... .... ......... 74 36 4 2 Environmental Consequences . .. ... .... ... . . ......... ...... . . 75 36 4.3 Management and Mitigation Measures ..... ... ... . .. .... .. .77 Environmental Assessment Sylvester Gulch Road Construction /Box Canyon Coal Methane Drainage Wells / Box Canyon Shallow Seismic Reflection Survey Gunnison County, Colorado