**Construction Specification 711---Removal of Water**

**1. Scope**

The work consists of the removal of surface water and ground water as
necessary to perform the construction required by the contract in
accordance with the specifications. It shall include: (1) constructing,
installing, building, and maintaining all necessary temporary water
containment facilities, channels, and diversions; (2) furnishing,
installing, and operating all necessary pumps, piping, and other
facilities and equipment; and (3) removing all such temporary works and
equipment after their intended function is no longer required.

**2. Diverting surface water**

The contractor shall install, maintain, and operate all cofferdams,
channels, flumes, sumps, and all other temporary diversion and
protective works needed to divert streamflow and other surface water
through or around the construction site. Control of surface water shall
be continuous during the period that damage to construction work could
occur. Unless otherwise specified and/or approved, the diversion outlet
shall be into the same drainageway that the water would have reached
before being diverted.

The contractor shall furnish the contracting officer, in writing, a
proposed plan for diverting surface water before beginning any
construction activities for which a diversion is required, unless waived
in section 8 of this specification. Acceptance of this plan or the
waiving of the plan requirement will not relieve the contractor of the
responsibilities related to this activity during the process of
completing the work as specified.

**3. Dewatering the construction site**

Foundations, cutoff trenches, and all other parts of the construction
site shall be dewatered and kept free of standing water and muddy
conditions as necessary for the proper execution of the work. The
contractor shall furnish, install, operate, and maintain all drains,
sumps, pumps, casings, well points, and all other equipment required to
properly dewater the site as specified. Dewatering systems that cause a
loss of soil fines from the foundation areas will not be permitted.

The contractor shall furnish the contracting officer, in writing, a
proposed plan for dewatering before commencing with any construction
activity for which dewatering may be required, unless waived in section
8 of this specification. Acceptance of this plan or the waiving of the
plan requirement will not relieve the contractor of the responsibilities
for completing the specified work.

**4. Dewatering borrow areas**

The contractor shall maintain all borrow areas free of surface water or
otherwise provide for timely and effective removal of surface and
subsurface water that accumulates within the borrow area, unless waived
in section 8 of this specification. Borrow material shall be processed
as necessary to achieve proper and uniform moisture content at the time
of placement.

If pumping to dewater borrow areas is included as a bid item of work in
the bid schedule, each pump discharge pipe shall be equipped with a
water meter. The meter shall be such that the measured quantity of water
is accurate within 3 percent of the true quantity. The contractor shall
provide necessary support to perform accuracy tests of the water meter
when requested by the contracting officer.

**5. Erosion and pollution control**

Removal of water from the construction site, including the borrow areas,
shall be accomplished so that erosion and the transporting of sediment
and other pollutants are minimized. Pollution control activities shall
not conflict with the requirements of Construction Specification 5,
Pollution Control, if it is a part of this contract.

**6. Removal of temporary works**

When temporary works are no longer needed, the contractor shall remove
and return the area to a condition similar to that which existed before
construction. Areas where temporary works were located shall be graded
for sightly appearance with no obstruction to natural surface waterflows
or the proper functioning and access to the works of improvement
installed. The contractor shall exercise extreme care during the removal
stages to minimize the loss of soil sediment and debris that was trapped
during construction.

Pipes, casings, and any other material used to dewater the site shall be
removed from temporary wells. The wells shall be filled to ground level
with clean gravel or other suitable material approved by the contracting
officer. The contractor shall exercise extreme care to prevent pollution
of the ground water by these actions.

**7. Measurement and payment**

***Method 1---***Items of work listed in the bid schedule for removal of
water, diverting surface water, and dewatering construction sites and
borrow areas are paid for at the contract lump sum prices. Such payment
will constitute full compensation for all labor, equipment, tools, and
all other items necessary and incidental to the completion of the work.

***Method 2---***Items of work listed in the bid schedule for removal of
water, diverting surface water, dewatering construction sites, and
dewatering borrow areas are paid for at the contract lump sum prices.
Such payment will constitute full compensation for furnishing,
installing, operating, and maintaining the necessary trenches, drains,
sumps, pumps, and piping and for all labor, equipment, tools, and all
other items necessary and incidental to the completion of the work. The
exception is that additional payment for pumping to dewater borrow areas
and the removal of water will be made as described in the following
paragraph.

If pumping to dewater borrow areas is a contract bid item, payment is
made at the contract unit price, which shall be the price per 1,000
gallons shown in the bid schedule. Such payment will constitute full
compensation for pumping only. Compensation for equipment and
preparation and for other costs associated with pumping is included in
the lump sum payment for removal of water or the lump sum payment for
dewatering the borrow areas. Payment is made only for pumping that is
necessary to dewater borrow areas that cannot be effectively drained by
gravity or that must have the water table lowered to be usable as a
suitable borrow source. Pumping for other purposes will not be included
for payment under this item.

***All Methods---***The following provisions apply to all methods of
measurement and payment. Compensation for any item of work described in
the contract, but not listed in the bid schedule is included in the
payment for the contract line item to which it is made subsidiary. Such
items and the items to which they are made subsidiary are identified in
section 8 of this specification.

**8. Items of work and construction details**

Items of work to be performed in conformance with this specification and
the construction details therefore are:

[Bid Item 8, Removal of Water]{.underline}

(1) This item shall consist of all temporary works necessary to divert,
    bypass, or remove surface water and ground water from the
    construction areas of the site in order to install the works as
    shown on the drawings.

(2) Damage to installed temporary works from rainfall runoff or from the
    contractor\'s operations shall be repaired before proceeding with
    other work unless otherwise approved by the contracting officer.

(3) No written plan for diverting water or dewatering the construction
    sites will be required.

(4) Measurement and payment shall be by Method 1.