NORTHDIV Form BB-1d
BASIS OF BID FOR LUMP SUM CONTRACTS INVOLVING ROCK EXCAVATION
All work complete in
accordance with the
drawings and spec-
ifications but not
including the work
indicated or specified
under lb. [and 1c.]
Bulk Rock Excavation*
Trench Rock Excavation**
Total Estimated Amount (Aggregate Amount) for Item 1
* Bulk rock excavation is that which removal is not confined within
limiting lines of 3 feet or less.
** Trench rock excavation is that which removal is confined within a
width of 3 feet or less and cut under controlled conditions.
Refer to Section 02221, Earthwork for Structures and Pavements, and
Section 02225, Excavation, Backfilling, and Compacting for Utilities.
Rock payout lines are to be shown on the drawings using the following guidance:
Two foot outside of concrete work for which forms are
required, except footings.
One foot outside perimeter of footings.
In pipe trenches, 6-inches below invert elevation of pipe and
2 ft. wider than inside diameter of pipe, but not less than 3
ft. minimum trench width.
1 of 3.