HomeMy WebLinkAboutSection 02401 Dewatering
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SECTION 02401 DEWATERING
PART 1 - GENERAL
1.01 SCOPE:
A. Summary or Work: The CONTRACTOR shall furnish all labor, material and
equipment necessary for the removal of all surface and subsurface waters from
excavation areas.
1.02 APPLICABLE PUBLICATIONS:
A. Contract specific Soils Report / Report of Geotechnical Investigation
1.03 SUBMITTALS: The CONTRACTOR shall make submittals in accordance with SECTION
01300 and the following:
A. The CONTRACTOR shall submit to the ENGINEER a dewatering plan, which
includes dewatering equipment, safety procedures, sequence of construction, and
re-watering procedures, prior to the start of any such operations.
B. Acquire all permits required to discharge water and protect waterways from turbidity
during the dewatering operation. Discharge of waters off the canal right-of-way will
not be permitted.
1.04 RESPONSIBILITIES:
A. The dewatering of any excavation areas and disposal of all water handled shall be in
strict accordance with all local and state government rules and regulations and the
dewatering permit.
B. The CONTRACTOR shall be responsible for the design and permitting of the
dewatering system including, but not necessarily limited to, required pump
equipment, temporary shoring, as well as any miscellaneous temporary structures
required.
1.05 INSPECTION COORDINATION: The CONTRACTOR shall provide access to the WORK
for the ENGINEER as requested for inspection. The Contractor shall provide 48 hours
notice of its intention to begin new WORK activities.
PART 2 - PRODUCTS
2.01 PRODUCT REQUIREMENTS: All materials used in the construction of the dewatering
facilities shall be selected, furnished and installed by the CONTRACTOR in accordance
with the design as submitted to the ENGINEER.
PART 3 - EXECUTION
3.01 DEWATERING:
A. The CONTRACTOR shall provide adequate equipment for removal of storm, and
subsurface waters, which may accumulate in the excavation.
B. The CONTRACTOR shall perform all work for the water system in the excavation
free from water. The CONTRACTOR shall furnish, install, maintain, and operate all
necessary pumping and other equipment necessary for dewatering the work area.
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1. All dewatering equipment shall be in first-class condition and shall at all times
be maintained and operated at the efficiency and capacity necessary for
maintaining the excavation free from standing water or wet conditions that
prevent proper construction.
C. The CONTRACTOR shall provide dewatering facilities with stand-by pumps with 100
percent standby capacity.
D. The CONTRACTOR shall comply with all local, state and federal regulations when
disposing of water generated by dewatering operations.
3.02 REMOVAL OF DEWATERING SYSTEM:
A. The CONTRACTOR shall remove the dewatering system in such a manner as to
allow groundwater elevations to slowly return to natural elevations.
3.03 REGULATION SCHEDULE:
A. Noise Abatement: The CONTRACTOR shall furnish, install, and maintain throughout
the course of the work, mufflers, noise-control enclosures, or other noise control
methods, measures, and features on and around all dewatering pumps and their
prime movers such that steady noise emanating from this equipment does not
exceed the permissible sound levels defined in the local County ordinances.
END OF SECTION