Rehabilitation of Highway 62 West, Crater Lake National Park, Klamath County, Oregon
ALTERNATIVES CONSIDERED BUT DISMISSED FROM DETAILED ANALYSIS
Figures 7, 8, and 9 illustrate three additional options that were considered for the realignment of the switchbacks. In options 1 and 1A, the lower switchback alignments would cut into the hill on the east side of the road. These two options require approximately 2,700-square yards (option 1A) to 3,900-square yards (option 1) (0.6 to 0.8 acre, 0.2 to 0.3 hectare) additional area of disturbance than alternative C. The area of disturbance would come within 213 feet (65 meters) of the proposed wilderness boundary. These options would also make snow removal more difficult than the current conditions, and potentially lead to more rock and snow slides. Therefore, these two alternatives do not best meet the purpose and need for the project and were dismissed from further consideration.
Although option 4 would create 1,190-square yards (0.25 acre, 995-square meters) less new disturbance than alternative C, this option would require the removal of more mature/large trees than alternative C, and would require a grade of over 7% making the road steeper than current conditions and possibly creating new safety hazards. Therefore, this alternative does not meet the purpose and need sufficiently for the project and was dismissed from further consideration.
FIGURE 7. OPTION 1 — ALTERNATIVE CONSIDERED BUT ELIMINATED [NPS-DSC\OCT02\106\20137]
FIGURE 8. OPTION 1A — ALTERNATIVE CONSIDERED BUT ELIMINATED [NPS-DSC\OCT02\106\20138]
FIGURE 9. OPTION 4 — ALTERNATIVE CONSIDERED BUT ELIMINATED [NPS-DSC\OCT02\106\20139]