Prefeasibility Access Road Design-Revised
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the clear zone. The back slope is steep and reduces the impact to timber, as well as
reducing the amount of cut in areas that are likely to be rocky. The ditch bottom
width of 20 feet allows room for snow to be pushed or blown off the roadway and
stored away from the road.
XI PREFEASIBILITY COST ESTIMATES
To develop estimates during prefeasibility analysis alignments and corridors were
built and quantities calculated. Prices were requested from contractors in writing
for the main items involved during construction of roads. Intermountain
Construction and Materials, Earthwork Solutions, and Pearson Forestry all provided
written and signed letters with unit prices for estimating use.
a.
Preliminary cost estimates for construction were created by applying the unit
prices provided by area contractors to the quantities found on each route being
analyzed for access. These estimates are intended to provide construction costs
with +/-30% accuracy. Full cost estimates are included in Appendix E, and a
breakdown of final cost and cost per mile is shown in the table below.
ROUTE
TOTAL COST OF
CONSTRUCTION
TOTAL
COST PER
MILE
MAINTENANCE
COST TOTAL
MAINTENANCE
COST PER
MILE
WARREN PEAK ROAD
$22,105,000
$2,303,000
$160,000
$17,000
MILLER CREEK ROAD
$14,226,000
$1,294,000
$230,000
$22,000
b.
Maintenance cost estimates have also been developed for each route containing
information gathered from local contractors and municipalities. Snow removal
has been calculated by taking information supplied by local contractor DRM, Inc.
The calculation was made by assuming the routes will be required to be plowed
twice per snow event and applying the average number of days with snowfall in
Crook County. This is then multiplied by the cost per mile of snow removal
supplied by DRM, Inc. Costs are calculated using two applications per year.
c.
Dust Control has also been included in the maintenance cost estimates. An
analysis has been completed estimating the amount of water required for dust
suppression on both the Miller Creek Route and Warren Peak.
MILLER CREEK ROUTE
If selected, the Miller Creek Route will be completely surfaced in its entirety with
aggregate. Suppression of dust for unpaved roads can be accomplished with the
use of water or chemicals.
