[Ord. 146, 2/18/1992, § 300]
1.
Excavation shall include any material encountered (including surface
pavement and rock) removed to the required depth for installation
of minimum bedding specifications.
2.
Before the start of construction, the contractor shall check drawings,
noting any deviations and discrepancies. All dimensions shall be checked
to determine if equipment will fit and that materials can be installed
as specified or shown on drawings. Any deviations or discrepancies
the contractor notes must be brought to the immediate attention of
the Township.
[Ord. 146, 2/18/1992, § 301]
1.
Prior to any excavation, the developer/contractor shall be responsible
for contacting PA One-Call to locate all underground utilities within
the area of proposed work in conformance to Pennsylvania Act 172.
The developer/contractor shall be responsible for determining the
exact location of utilities and underground structures.
2.
All utility services encountered shall be supported by timber struts
or by other suitable means approved by the respective authority/owner.
Utilities or other structures located transversely across the trench
shall be protected from damage or displacement.
3.
Whenever a sewer crossing is installed over or beneath an existing/new
utility line, the developer/contractor shall contact the respective
authority/owner for inspection. Notice shall be given to the utility
in advance of said crossing, and it shall be backfilled only when
authorized by the respective authority/owner. If the respective authority/owner
cannot immediately inspect and the trench cannot be safely protected,
temporary backfilling shall be performed until an acceptable inspection
can be scheduled.
[Ord. 146, 2/18/1992, § 302; as amended by Ord.
167, 12/17/1996]
1.
Whenever excavation takes place within paved areas, all asphalt material
shall be properly segregated and stockpiled separately from trench
(earthen) material.
2.
Bituminous material may not be mixed with soil or used for bulk filling
operations or preparation of subgrade.
3.
Bituminous material must be disposed of in one of the following manners:
A.
Hauled to a quarry/asphalt plant equipped with the appropriate facilities
for recycling.
B.
Hauled to an approved landfill.
C.
Utilized and mixed with crushed stone aggregate for construction
of private parking lot subbase when the aggregate/asphalt mixture
subbase does not exceed one foot in thickness.
D.
In any other manner or method approved in writing by the Department
of Environmental Protection.
E.
The developer/contractor shall keep a written record of all receipts,
bills of lading and manifests regarding transportation and disposal
of asphalt. Such documents shall be provided to the Township to verify
the method of disposal.
[Ord. 146, 2/18/1992, § 303]
1.
Trench Dimensions.
A.
Trenches shall be dug to depths and widths which provide maximum safety to all workmen, Township representatives and the public. (Refer to § 18-333, Shoring.)
B.
Trench excavation shall be of the required depth and of sufficient
width to provide adequate room for the construction and installation
of pipe, manholes and related appurtenances. All pipe shall be installed
so a clear space of not less than 12 inches nor more than 30 inches
in width is provided on each side of the pipe from the excavated trench
subgrade to a point one foot above the top of the pipe.
C.
From a point 12 inches above the top of the pipe to the surface, the trench walls shall be kept as vertical as possible without violation of the shoring requirements of § 18-333.
D.
Shoring and bracing shall be provided at the expense of the developer/contractor
as necessary to maintain safe working conditions.
2.
Where a section of trench as been excavated to a greater depth than
specified, it shall be brought to the proper grade using extra 2B
stone (AASHTO 57). Furnishing and placing of extra stone shall be
at the expense of the developer/contractor.
3.
The Township shall have the right to limit the amount of trench opened
in advance of completed sewer. Excavation shall be completed a minimum
of 20 feet in advance of pipe installation. The amount of pipe laid
in advance of backfilling shall not exceed 100 feet unless approved
by the Township.
4.
Excavation limits for manholes and structures shall be to the minimum
horizontal limits in which a man can work safely and efficiently in
conformance to applicable OSHA regulations.
5.
Pipe trenches, manholes and structures shall be excavated six inches
deeper than elevations shown on the plans in order to provide for
six inches of 2B (AASHTO 57) stone bedding.
6.
Pipe/trench grades and alignment shall be set by laser or in a manner
acceptable to the Township.
[Ord. 146, 2/18/1992, § 304]
1.
The contractor shall classify, separate and store materials as may
be required for reuse in backfilling, repaving or replacing topsoil.
If the contractor prefers not to separate surface/excavated materials,
he shall furnish replacement materials of equal quantity and quality
acceptable to the Township.
2.
Excavated material shall be placed so as not to interfere with traffic
on streets and driveways.
3.
Stockpiling excavated material on the existing cartway is prohibited.
The developer/contractor must acquire a suitable location for stockpiling/disposal
of material.
[Ord. 146, 2/18/1992, § 305]
1.
All excavations shall be free of water during construction of structures,
pipelaying and backfilling operations. The contractor shall provide
and place all necessary flumes, channels or pipes required to temporarily
divert water from the excavation. All water from any source shall
be pumped or bailed to provide a dry hole. All water pumped from the
excavation must be discharged so it shall not cause damage to work
completed, damage to property, or environment, health hazards or impediment
to traffic. In no case shall water be permitted to rise into or flow
through a completed sewer.
2.
The contractor must refer to an approved erosion and sedimentation control plan for disposal of pump water. If not specified on an erosion, sedimentation and pollution control plan, approval for the discharge location must be received from the Bucks County Conservation District and the Township. (Refer to § 18-304, Subsection 7.)
[Ord. 146, 2/18/1992, § 306]
Rock excavation will be accomplished by drilling and wedging
or blasting as permitted by the Township. Rock shall be fully removed
at least 25 feet in advance of pipelaying. The bottom width shall
not exceed the widths of the trench for the specified pipe. Overblasted
rock at the bottom of the trench shall be excavated to a depth where
unstable material has been removed or to a depth of 18 inches (whichever
is greater) and replaced with PennDOT 2B (ASSHTO 57) stone. The cost
for extra material and excavation shall be at the expense of the developer/contractor.
