ALTERNATIVES
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MITIGATION MEASURES COMMON TO ACTION ALTERNATIVES
Mitigation
Mitigation measures were analyzed as part of the action alternatives to
rehabilitate Highway 62 West. Mitigation measures discussed below have been
prepared to lessen or eliminate any potential adverse effects of alternatives B
and C.
FIGURE 5. PACIFIC CREST TRAIL ACCESS DRIVE REALIGNMENT [NPS-DSC\OCT02\106\20135]
FIGURE 6. PROPOSED SWITCHBACK REALIGNMENT [NPS-DSC\OCT02\106\20136]
All removed trees 8-inches in diameter at breast height (dbh) would be saved and
stockpiled to be used as trail features such as bridges, railings, benches,
signs, etc. The maximum length should be standard lumbering length, which is
around 40 feet.
Up to six trees over 10-feet tall located at or near the toe of the fill slopes
would be protected with tree wells and six to eight trees under 10-feet tall
would be saved for transplanting.
Highway 62 West improvements would be limited to the minimum corridor necessary
for a safe driving experience. Both the designs and colors of construction
materials would blend with the surroundings. Cut and fill slopes would be
roughened and revegetated to blend into the natural environment.
Sediment traps, erosion check structures, and/or filters would be considered.
Best management practices are means of preventing or reducing nonpoint source
pollution into drainages and of minimizing soil loss and sedimentation. Best
management practices would include all or some of the following features,
depending on site-specific requirements:
-
Locating excavated materials outside of drainages to avoid sedimentation;
-
Conducting regular site inspections throughout the construction period to
ensure that erosion-control measures were properly installed and function
effectively;
-
Armoring (with large rock and boulders) slopes that exceed 2:1 to reduce or
prevent erosion;
-
Properly storing, using, and disposing of chemicals, fuels, and other toxic
materials; and
-
Refueling construction equipment in upland areas only, to prevent fuel spills
near water resources.
