developing the sources, including rights-of-way for hauling. Borrow
material from approved sources on Government-controlled land may be
obtained without payment of royalties. Unless specifically provided, no
borrow shall be obtained within the limits of the project site without
prior written approval. Necessary clearing, grubbing, and satisfactory
drainage of borrow pits and the disposal of debris thereon shall be
considered related operations to the borrow excavation.
3.4
OPENING AND DRAINAGE OF EXCAVATION AND BORROW PITS
**************************************************************************
NOTE: The first sentence will be deleted when all
work covered by Invitation for Bids is to be
included in one lump-sum contract price.
**************************************************************************
The Contractor shall notify the Contracting Officer sufficiently in advance
of the opening of any excavation or borrow pit to permit elevations and
measurements of the undisturbed ground surface to be taken. Except as
otherwise permitted, borrow pits and other excavation areas shall be
excavated providing adequate drainage. Overburden and other spoil material
shall be transported to designated spoil areas or otherwise disposed of as
directed. Borrow pits shall be neatly trimmed and drained after the
excavation is completed. The Contractor shall ensure that excavation of
any area, operation of borrow pits, or dumping of spoil material results in
minimum detrimental effects on natural environmental conditions.
3.5
SHORING
3.5.1
General Requirements
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NOTE: Include this paragraph when scope of work
requires excavations which are greater than 1.5 m (5
feet) or where it is known that in-situ soils lack
the stability to hold near vertical faces. Where
sufficient room is available, the Contractor may
slope back trench walls rather than having to use a
shoring system. However, the Contractor should not
be given the opportunity to slope the faces of
excavations in lieu of providing shoring unless all
the following conditions are met:
1. The excavation is less than 6 m (20 feet) in
depth.
2. There are no adjacent structures, roads, or
pavements that will affect the excavation.
3. No equipment, stored material, or overlying
material will affect the excavation.
4. Vibration from equipment, traffic, or blasting
will not affect the excavation.
5.
There will be no ground water problems.
6.
Surcharges will not affect the excavation.
SECTION 02300
Page 28
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