115582_-_Special_Provisions.pdf
PDF 147 KB Posted
- Attached to
- Greenbelt Road Large Valve Vault Replacement
- Solicitation number
- 115582
- Issued by
- Prince George's County, Maryland
About this file
This file comprises Special Provisions issued by the Washington Suburban Sanitary Commission (WSSC) Water in Maryland for the Greenbelt Road Large Valve Vault Replacement project. The project involves the replacement of approximately 340 feet of 30-inch Cast Iron Pipe (CIP) and 42-inch Prestressed Concrete Cylinder Pipe (PCCP), installation of 9 feet of 30-inch Ductile Iron Pipe (DIP), 331 feet of 42-inch DIP water mains, installation of a new 42-inch water valve vault, and demolition of an existing 36-inch valve vault located between Lakecrest Circle and the intersection of Lakecrest Drive and Greenbelt Road in Greenbelt, Prince George's County, Maryland. Sealed responses are due by 2:00 pm on Thursday, October 15, 2026, via WSSC's eProcurement Portal. The Special Provisions establish modified requirements for temporary facilities and controls, water distribution system materials, metal fabrications, and project signage, with specifications for project signs to be provided at the intersection of Greenbelt Road and Lakecrest Drive facing east.
The Special Provisions include detailed technical requirements for valve specifications, including a revision to valve size ratios for sizes ranging from 16 inches to 48 inches, and specifications for hatches and slab access doors designed for 300 psf live load capacity with reinforced aluminum covers and stainless steel hardware. The provisions also outline procedures for contractors to follow when encountering Lead Service Lines (LSL), Galvanized Requiring Replacement (GRR) service lines, or unknown service line materials during construction, requiring coordination with the WSSC Contract Manager and cessation of work until proper verification and replacement procedures are completed. The file does not specify pricing terms, set-asides, contract duration, or funding sources.
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Text version
SP-01500-1
SPECIAL PROVISIONS
SECTION 01500
TEMPORARY FACILITIES AND CONTROLS
Follow requirements of Standard Specifications Section 01500 except as specified herein.
PART 1 GENERAL
1.4 PROJECT SIGNS
B. Water Main Replacements, Relocations and Cleaning and Lining Contracts.
ADD
5. Provide at the following intersections:
a. Greenbelt Road and Lakecrest Drive facing east.
SP-05500-1
SECTION 02510
WATER DISTRIBUTION SYSTEM
Contractor Furnishes All Material
Follow requirements of Standard Specifications Section 02510 except as specified herein.
PART 2 PRODUCTS
DELETE:
2.1.C.2.h.1).c) J AND S Valve Series 7800 (ASME B61.1, Class 125 Flanges).
REVISE TABLE TO READ:
2.1.C.3.i
Valve Size Ratio Valve Size Ratio 16” 8:1 30” 12:1 18” 8:1 36” 12:1 20” 8:1 42” 16:1 24” 8:1 48” 16:1
DELETE:
2.1.C.3.m.3) J AND S Valve Series 7800 (ASME B61.1, Class 125 Flanges).
SP-02514 April 2024
SPECIAL PROVISION
SECTION 02514
WATER MAIN REPLACEMENT WITH EXISTING LEAD,GRR OR UNKNOWN SERVICE LINE
PART 1 GENERAL 1.1
INTENT
A. It is the intent of this section to provide guidance in the event existing Lead Service Line (LSL), Galvanized Requiring Replacement (GRR) or unknown material service are encountered during watermain replacement located in the public Right of Way.
B. Commission records available may not confirm the presence of LSL,GRR service line within the project limits.
1.2 DESCRIPTION
A. The Contractor shall coordinate with WSSC Contract Manager before the construction begins.
If the construction is known to impact any homes with LSL, Galvanized Requiring Replacement (GRR), or homes with unknown service line material, construction shall not begin until WSSC notifies customers and verifies pipe material and/or coordinates for replacement of the service line prior to water main construction.
B. If the Contractor unexpectedly encounters an LSL or GRR during construction, the Contractor shall immediately cease further activities on the service line and report to WSSC Contract Manager on additional actions before construction resumes.
**WSSC Water**
SP-05500-1
SECTION 05500
METAL FABRICATIONS
Follow requirements of Standard Specifications Section 05500 except as specified herein.
PART 2 PRODUCTS
2.1 MATERIALS
J. Hatches (SLAB ACCESS DOORS):
1. Loading: Designed and manufactured for 300 psf live load with maximum allowable deflection not more than 1/1500 of span.
2. Cover: Reinforced 1/4” mill finish, aluminum diamond plate.
3. Frame:
a. Extruded aluminum channel with bituminous exterior coating and provision for positive anchoring when cast into concrete slab.
b. With 1-1/2” drain coupling to allow piped disposal of water.
4. Hinges: Forged, Type 316 stainless steel with min. 1/4” diameter pin.
5. Latch: Type 316 stainless steel, slam type with interior handle and removable, exterior, square key handle.
6. Lift Assistance: Compression spring enclosed in telescoping tubes.
7. Provision to Keep Cover in Open Position: Deploys automatically and equipped with handle to release.
8. Required Optional Features:
a. Recessed padlock hasp on all outdoor units only.
b. Continuous neoprene or EPDM perimeter gasket between frame and cover on all indoor units only.
9. Manufacturers and Models:
a. Bilco Company, Types J-AL and JD-AL
b. Halliday Products, Series W1S and W2S
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