1.7.2
Rock Excavation
Rock excavation shall include blasting, excavating, grading, and disposing
of material classified as rock and shall include the satisfactory removal
and disposal of boulders 1/2 cubic meter yard or more in volume; solid
rock; rock material that is in ledges, bedded deposits, and unstratified
masses, which cannot be removed without systematic drilling and blasting;
firmly cemented conglomerate deposits possessing the characteristics of
solid rock impossible to remove without systematic drilling and blasting;
and hard materials (see Definitions). The removal of any concrete or
masonry structures, except pavements, exceeding 1/2 cubic meter yard in
volume that may be encountered in the work shall be included in this
classification. If at any time during excavation, including excavation
from borrow areas, the Contractor encounters material that may be
classified as rock excavation, such material shall be uncovered and the
Contracting Officer notified by the Contractor. The Contractor shall not
proceed with the excavation of this material until the Contracting Officer
has classified the materials as common excavation or rock excavation and
has taken cross sections as required. Failure on the part of the
Contractor to uncover such material, notify the Contracting Officer, and
allow ample time for classification and cross sectioning of the undisturbed
surface of such material will cause the forfeiture of the Contractor's
right of claim to any classification or volume of material to be paid for
other than that allowed by the Contracting Officer for the areas of work in
which such deposits occur.
1.7.3
BLASTING
[Blasting shall be performed [as specified in Section [_____]] [in
accordance with EM 385-1-1] and in conformance with Federal, State, and
local safety regulations. The Contractor shall submit a Blasting Plan,
prepared and sealed by a registered professional engineer that includes
calculations for overpressure and debris hazard. Blasting mats shall be
provided and non-electric blasting caps shall be used. The Contractor
shall obtain written approval prior to performing any blasting and shall
notify the Contracting Officer 24 hours prior to blasting. The plan shall
contain provisions for storing, handling and transporting explosives as
well as for the blasting operations. The Contractor shall be responsible
for damage caused by blasting operations.] [Blasting will not be
permitted.]
1.8
CRITERIA FOR BIDDING
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NOTE: For most projects, the scope of earthwork can
accurately be determined. However, if earthwork is
approximately known, a unit price for earth work
should be provided in the Bid Schedule.
Unit-price items are multiplied by the approximated
and stated quantity giving a sum that is then added
to the price for the rest of the work. The result
is a lump sum bid with automatic provision for
payment or credit due to variations in earthwork
within 15 percent of that shown and bid upon.
Variations exceeding 15 percent of that shown and
bid upon will become the subject of negotiations in
accordance with FAR 52.212.11, "VARIATION IN
SECTION 02300
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