EP 1130-2-520
29 Nov 96
(2) Dredging an equivalent box cut at the base of the side slope for the required
dimension. Material removed from the box cut is payable up to that amount of material above the
side slope line. Before using a box cut, the integrity of structures adjacent to the channel should
be reviewed. See Figure #2 in Appendix Y.
8-6. Dredging Contracts.
a. Development of Contract Documents. The development of contract documents is
applicable to new work dredging, maintenance dredging, and dredging for other purposes such as
beach nourishment, dike and levee construction, and other beneficial uses.
(1) Team members responsible for preparation of construction contracts for dredging
shall ensure that plans and specifications accurately describe the work to be accomplished, the
conditions existing at the work site, the required dredging quantities for unit price contracts, the
required prism, allowable over depth, the limits of the work area, and any environmental
considerations at the work site.
(2) District commanders shall establish procedures which ensure that appropriate
technical and contract administration personnel with dredging experience (both office and field)
are included in the constructibility, biddability, and operability reviews of all dredging plans and
specifications.
(3) Terminology and standard sections used in contract documents shall be consistent
with standard definitions and figures depicted herein.
(4) When zero allowable over depth is specified, the contract documents shall clearly
indicate that all material from within the required dredging prism must be removed. The
contractor may dredge below the required depth to ensure that all material is removed from within
the required prism, however, the contract documents will make clear that no payment will be
made for yardage removed below the required prism.
(5) New work dredging plans and specifications, where hard materials exist (e.g., dense
clays, rock, or manmade materials), shall have a required depth, required overdepth, required
advance maintenance and allowable overdepth, in order to ensure future maintenance of the
project to the authorized dimensions.
b. Dredging Contract Methods. Unit price construction contracts are the preferred
method of accomplishing dredging work within the Corps of Engineers.
(1) Unit Price Contracts - Volume Measure. To ensure that volume measure unit price
contracts are effectively used, the District Commander will:
(a) define the scope of work and determine the required and allowable overdepth
dredging quantities;
(b) define bid quantities to reflect the total required and allowable overdepth quantities;
(c) perform payment surveys in an accurate and timely manner;
8-2
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