70-REV 1.19.26 16402 Underground Construction.pdf
PDF 104 KB Posted
- Attached to
- Route 54 Sanitary Sewer Extension Project
- Solicitation number
- Not on record
- Issued by
- Lycoming County, Pennsylvania
About this file
This is a specification document for Section 16402 Underground Construction issued by the West Branch Regional Authority for the Route 54 Sanitary Sewer Extension Project, Contract No. WB-1, located in Clinton Township, Lycoming County, Pennsylvania. The work covers furnishing all labor, equipment, and materials necessary for the construction and installation of underground electrical conduit, service conductors, terminal lugs, splicing, and accessories to form a complete underground raceway system. The project includes approximately 1,520 linear feet of gravity sanitary sewer, 11 manholes, 13 lateral connections, one duplex sewage pumping station, 404 linear feet of force main, one stream crossing, and all required surface restoration and appurtenances. Sealed bids are due by 1:00 PM local prevailing time on Monday, February 16, 2026, at which time bids will be opened and tabulated. Bid documents are available for download exclusively from http://pennbid.net/, and prospective bidders are urged to register as plan holders to receive periodic updates including addenda, lists of plan holders, and other relevant information.
Each bid must be accompanied by a Certified or Bank Check or Bid Bond in the amount of ten percent (10%) of the total bid amount as security for proper execution of the Agreement. Work performed on the contract is subject to prevailing minimum project wage rates as established by the Pennsylvania Department of Labor and Industry. The contractor is subject to the provisions of the Pennsylvania Steel Products Procurement Act of 1978, P.L. 6, as amended. The specifications require compliance with the National Electrical Code (NFPA 70), American Concrete Institute standards, Underwriters' Laboratories specifications, and standards established by NEMA and ASTM. All underground installations must be watertight and free of cracks or breaks, with conduit ends sealed after cable installation. The Contractor shall perform all trenching and backfilling work and obtain inspection and approval from the Engineer as required.
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Text version
SECTION 16402
UNDERGROUND CONSTRUCTION DIVISION 16
West Branch Regional Authority 16402-1 January 2026 Route 54 Sanitary Sewer Extension Project Underground Construction Contract No. WB-1
PART 1 - GENERAL
1.01 WORK INCLUDED
A. The work covered by this section consists of furnishing all labor, equipment and materials necessary for the construction and installation of conduit, service conductors, terminal lugs, splicing, and accessories to form a complete underground raceway system required for the Project in strict accordance with this section of the specifications and the Drawings.
1.02 RELATED WORK
A. Section 02205: Earthwork for Pipelines: Excavation, backfilling and compaction for service entrance.
B. Section 03300: Cast-In-Place Concrete: Concrete encasing of buried conduits.
C. Section 16111: Conduit: Requirements for conduit.
D. Section 16120: Wires and Cables: Requirements for service conductors.
E. Section 16161: Grounding: Requirements for grounding the work of this Section.
1.03 REQUIREMENTS OF REGULATORY AGENCIES
A. National Fire Protection Association (NFPA)
1. NFPA 70 - National Electrical Code (NEC)
B. American Concrete Institute (ACI):
1. ACI 318 - Building Code Requirements for Reinforced Concrete
1.04 REFERENCE STANDARDS
A. Federal Specifications (FS)
1. FS W-C-1094A: Rigid Conduit and Conduit Fittings Plastic
2. FS SS-S-21OA(l): Sealing Compound, Preformed Plastic for Expansion Joints and Pipe Joints
B. Underwriter's Laboratories, Inc. (UL)
1. UL 651: Rigid Nonmetallic Conduit
2. UL 6: Rigid Metal Electrical Conduit
West Branch Regional Authority 16402-2 January 2026
C. National Fire Protection Association (NFPA)
1. NFPA 70: National Electrical Code (NEC)
D. National Electrical Manufacturers Association (NEMA)
1. NEMA TC2: Electrical Plastic Tubing and Conduit
2. NEMA TC3: PVC Fittings for Use with Rigid PVC Conduit and Tubing
3. NEMA TC6: ABS and PVC Plastic Utilities Duct for Underground
Installation
4. NEMA TC9: Fittings for ABS and PVC Plastic Utilities Duct for
Underground Installation
E. American Society for Testing and Materials (ASTM)
1. ASTM C478-75: Standard Specification for Precast Reinforced Concrete Manholes Sections
F. American Concrete Institute (ACI)
1. ACI 318-71: Building Code Requirements for Reinforced Concrete
1.05 REGULATORY REQUIREMENTS
A. Conform to National Electrical Code and to requirements of applicable inspection authority.
1.06 SUBMITTALS
A. Product Data: Submit in accordance with Section 01340: Shop Drawings, Product Data and Samples.
B. Substitutions: Items of equal function, quality and performance will be considered in accordance with Section 01600: Materials and Equipment.
PART 2 - PRODUCTS
2.01 MATERIALS/COMPONENTS
A. Conduit: Provide in accordance with Section 16111: Conduit.
B. Conductors: Provide in accordance with Section 16120: Wires and Cables.
C. Cable Lugs: Suitable for the application.
2.02 UNDERGROUND ELECTRICAL INSTALLATIONS
A. Spare conduits shall be installed where indicated on the Drawings. Conduits shall be
West Branch Regional Authority 16402-3 January 2026 installed at depths indicated by duct details and as necessary to enter the building. The entire underground installation shall be free of cracks or breaks and shall be watertight.
End of conduits shall be sealed with “Ductseal” after the cables are installed.
B. Underground conduits for the secondary services to the buildings, if indicated to be encased in concrete by the Utility, shall be encased in an envelope not less than three (3) inches thick around the outside limits of the conduits.
C. All underground service lateral conductors will be furnished and installed by the Utility from the Utility pole to the meter base.
D. The Contractor shall perform all trenching and backfilling required for the secondary service as outlined in Section 02205: Earthwork for Pipelines.
E. The entire service shall be installed in strict accordance with the regulatory requirements and Underwriters' regulations. The Contractor shall obtain inspection and approval of the work from the Engineer when and as required by them. The installation shall be complete in every respect and shall include all necessary accessories and auxiliary equipment required for a complete installation.
F Direct Buried Handholes: Furnish and install direct buried exterior electrical enclosures in size and shapes as indicated, or as required based on field conditions. Boxes and covers shall be constructed of polymer concrete, pre-cast into shape and sizes specified. Provide units with single piece covers attached to box using stainless steel hex head bolts. Cover shall include “Electric” logo stamped for identification.
PART 3 - EXECUTION
3.01 TRENCHING AND EXCAVATION
A. General
1. Refer to Section 02205: Earthwork for Pipelines - for trenching and excavation, backfilling and compaction requirements.
2. Work with extreme care near existing ducts, conduits, cables, and other utilities to avoid damaging them.
3. Cut the trenches neatly and uniformly.
3.02 DUCT LINE INSTALLATION
A. General
West Branch Regional Authority 16402-4 January 2026
1. Duct lines shall be in accordance with the NEC, as shown on the Drawings, and as herein specified.
2. Duct shall be sloped to drain away from building and equipment entrances. Pitch shall be not less than four (4) inches in 100 feet. Curved sections in duct lines shall consist of long sweep bends with a minimum radius of 50 feet in the horizontal and vertical directions. The use of manufactured bends is limited to building entrances and stub-ups to equipment.
3. Stub-ups to equipment mounted on outdoor concrete slabs shall be PVC SCH80 conduit.
4. All sweeps, elbows and stub-ups to above grade facilities/devices shall be PVC SCH80 conduit.
5. Upon completion of the duct/ductbank installation, a standard flexible mandrel shall be pulled through each duct to loosen particles of earth, sand, or foreign material left in the line. The mandrel shall be not less than twelve (12) inches long and shall have a diameter 2 inches less than the inside diameter of the duct. A brush with stiff bristles shall then be pulled through each duct to remove the loosened particles. The diameter of the brush shall be the same as, or slightly larger than, the diameter of the duct.
6. Seal the ducts and conduits at building entrances, and at outdoor terminations for equipment, with link seals or a suitable nonhardening compound to prevent the entrance of moisture and gases.
7. Install direct buried handholes at locations indicated on Drawings or as required for pulling or required based on NEC conduit bends. Handholes shall be installed direct buried on stone.
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