New Jersey

Department of Transportation

Standard Specifications

for Road and Bridge Construction

2007


 
Division 650 – Utilities
       
  Section 651 – Water
    651.01 Description
    651.02 Materials
    651.03 Construction
      651.03.01 Water Pipe
      651.03.02 Water Pipe, Bridge
      651.03.03 Water Service Connection
      651.03.04 Fire Hydrant
      651.03.05 Relocate Fire Hydrant
      651.03.06 Reset Fire Hydrant
      651.03.07 Reset Water Valve Box
      651.03.08 Water As-Built Plan
    651.04 Measurement and payment
  Section 652 – Sanitary Sewers
    652.01 Description
    652.02 Materials
    652.03 Construction
      652.03.01 Sewer Pipe
      652.03.02 Sanitary Sewer Pipe, Bridge
      652.03.03 Sanitary Sewer Pipe Lining
      652.03.04 Sanitary Sewer Service Connections
      652.03.05 Sanitary Sewer Manhole
      652.03.06 Reconstruct Sanitary Sewer Manhole
      652.03.07 Reset Sanitary Sewer Manhole
      652.03.08 Video Inspection of Sewer
      652.03.09 Sewer As-Built Plan
    652.04 Measurement and Payment
  Section 653 – Gas
    653.01 Description
    653.02 Materials
    653.03 Construction
      653.03.01 Gas Main
      653.03.02 Installing Gas Mains on Bridges
      653.03.03 Gas Service Connection
      653.03.04 Reset Gas Valve Boxes
      653.03.05 Gas As-Built Plan
    653.04 Measurement and Payment

Division 650 – Utilities

Section 651 – Water

651.01 Description  back to top

This Section describes the requirements for installing water pipe, resetting water valve boxes, connecting water services, installing, relocating, and resetting fire hydrant assemblies, and submitting as-built plans.

651.02 Materials  back to top


Provide materials as specified:
  Coarse Aggregate (No. 57) 901.03
  Concrete 903.03
  CLSM 903.09
  Structural Steel 906.01
  Bolts and Bolting Material 908.01
  Class B Bedding 909.01.02
  Class C Bedding 909.01.03
  Ductile Iron Water Pipe 909.02.08

Provide gaskets according to the manufacturer’s recommendations.

Provide steel pipe sleeves according to ASTM A 252, and galvanize according to ASTM A 123.

Provide galvanized channel supports, rods, bolts, nuts, washers, inserts, and other hardware required for the permanent installation according to ASTM A 123 or A 153.

See the Special Provisions for additional materials requirements.

651.03 Construction  back to top

651.03.01 Water Pipe

  1. Scheduling of Work and Interruption to Water Service. Provide the RE and the Utility with a detailed schedule of the work. Notify the Utility in writing at least 15 days before beginning construction of water facilities. Do not perform work on water facilities that will result in water service interruptions from April 1 through September 30 without approval of the Utility. The Department may extend this period based on weather conditions and system demand requirements as determined by the Utility. Perform the work to minimize adverse impact to the Utility’s operations.

    Perform work in a manner that is acceptable to the Utility’s inspector, and in coordination with the RE. Provide the Utility’s inspector with access to the work.

  2. Existing Utilities and Structures. Determine the location of surface and subsurface structures within the work site, including but not limited to underground electric, telecommunication, gas, and sewer facilities. Notify the RE when excavation is required within 10 feet of any existing utility, and submit a plan to the RE for approval, detailing the proposed methods of excavating around the existing utilities, and the proposed methods of protecting and supporting the existing utilities. Protect and support utility facilities encountered. Notify the RE and the Utility 3 days before crossing any existing utilities, so that the Utility may send a representative to the work site at the time of excavation or construction.

    Remove and dispose of abandoned pipe, services, valves, boxes, thrust blocks, and appurtenances, unless otherwise shown on the Plans as specified in 201.03.09. Cap or plug pipe that is to be abandoned in a manner that is acceptable to the Utility.

  3. Excavating. Before excavating, sawcut the full depth of the existing pavement and sidewalk. Excavate a trench for placing water pipe, valves, services, tees, or appurtenances. Obtain RE approval before finishing excavation. If the RE determines that the bottom of the trench is unstable, undercut as directed by the RE and backfill with Class B bedding. If the material at the bottom of the trench is rock or other hard material, excavate an additional 6 inches of the material below the bottom of the pipe. Backfill the undercut with Class C bedding. Ensure that trenches are kept free of any standing water during the installation. Do not excavate for trenches in embankments until the embankment has been constructed to an elevation of at least 3 feet above the top of the pipe or to the top of the embankment, whichever is lower. Do not excavate trenches more than 300 feet in advance of installing the pipe unless approved by the RE.

    Maintain trenches according to 29 CFR 1926. Provide and maintain trench crossings where necessary. For trenches in the traveled way, shoulder and within 30 feet of the outside edge of the shoulder, backfill and restore the pavement structure and match the surrounding condition before opening to traffic. The Contractor may use temporary protection instead of backfilling trenches in the traveled way and shoulder. If using temporary protection, submit working drawings for approval. For trenches not in the traveled way and shoulder, do not leave trenches open overnight unless protected with caution fence.

  4. Handling of Pipe and Accessories. Lift pipe and other items using hoists. Do not drop pipe onto the ground or into a trench, and do not permit pipe to roll or skid against other pipe.

  5. Installing Water Pipe. Identify areas where pipe will have less than 4 feet of cover. Provide the RE with a report of the identified areas in order to obtain the Utility’s approval.

    Use a laser system to control the alignment and grade of the pipe. Lay water pipe in straight lines. If deviations from a straight line are approved by the RE, ensure that the deflection at each pipe joint does not exceed the manufacturer’s recommended maximum deflection.

    Provide additional pipe or connections necessary to bypass obstructions or other utilities. Adjust the depth of the pipe to pass obstructions, as approved by the RE. When grade changes through curves are required, divide the curve among several joints. Install the pipe so that it is solidly supported by the subgrade or pipe bedding as required, over its full length except where recesses have been made for joints.

    Ensure that the interior of the pipe is kept clean and free of intrusion by soil, or other foreign material. Ensure that the inside of the pipe is maintained clean and that valves and hydrants are in good working order when installed. Protect open ends of the pipe at all times and securely seal the openings with plugs approved by the Utility whenever work is stopped. Remove the plug, and inspect and clean the interior of the pipe before resuming pipe installation.

    Join pipe according to the manufacturer’s recommendations. Cut pipe according to the manufacturer’s recommendations. Ensure cuts are clean and square. Install gate valves, inserting valves, tapping sleeves, tapping valves, valve boxes, blow-offs, and miscellaneous fittings. Set the fittings and valves true to the pipe lines. Ensure that valve stems are set plumb. Support the valves with concrete blocking set on firm ground that has been compacted using a mechanical plate tamper. Set valve boxes plumb, centered with respect to the valve stem, and flush with the finished grade.

    Coordinate the installation of water mains with other work and prevent conflicts and interference with all existing facilities and proposed construction. Install tapping valves and insert valves as wet connections with no loss of water or interruption of flow. Notify the Utility 15 days before performing wet connections. Perform wet connections according to the equipment manufacturer’s recommendations.

  6. Hydrostatic Pressure Testing and Leakage Testing. After laying and joining a complete section of pipe between valves, and before backfilling, pressure-test the pipe line. Expel the air from the pipe line through blow-offs or taps, and ensure that the caps, plugs, and fittings are adequately braced and anchored. Perform pressure testing of the water main according to the AWWA Standard C600 in the presence of the Utility inspector using a minimum test pressure of 150 pounds per square inch. Maintain the pressure in the pipe for 120 minutes. Demonstrate that flanged, victaulic, or welded joint pipe lines exhibit no leaks under pressure. Demonstrate that the leakage for mechanical jointed pipe lines, or push-on joint pipe lines do not exceed the allowable leakage rate as computed by:

  7.  
      Where:
      L = allowable leakage in gallons per hour
      N = number of joints in length of pipe tested
      D = nominal diameter of pipe in inches
      P = average test pressure during the leakage test in pounds per square inch

    Where it is impractical to maintain an open trench for the full length of any section between valves, provide test plugs and perform pressure testing and leakage testing to the satisfaction of the Utility

  8. Backfilling. Symmetrically place backfill on each side of the pipe in lifts not exceeding 6 inches thick, loose measurement, and compact with a flat faced tamper using the directed method as specified in 203.03.02.C. Where bedding is not required, backfill with suitable excavated material that is free from rock larger than 2 inches in diameter. Reuse excess or excavated material as specified in 202.03.07.A. The Contractor may use CLSM as alternate backfill material when backfilling trenches. If using CLSM, install as specified in 601.03.01.F. Restore the existing pavement structure to the original condition or as shown on the Plans.

  9. Disinfection/ Bacteriological Testing. Before placing pipelines into service, disinfect the system according to the AWWA Standard C651 except if trench water has entered the main or if the water temperature is less than 41 °F, use the continuous feed method. Use hypochlorite or liquid chlorine according to AWWA Standards B-300 and B-301 respectively. Introduce and distribute the chlorine into the new lines using a minimum dosage of 50 parts per million. Maintain the chlorinated water in the system for a minimum of 24 hours. Contact the Utility inspector to verify the chlorine residual is 50 parts per million. Flush the pipe line in a manner approved by the Utility until the chlorine concentrations are no higher than generally prevailing in the system.

    Retain a certified Testing Laboratory to sample and test the water for bacteriological and turbidity analysis according to the AWWA C651 and the Federal Safe Drinking Water Act (40 CFR, Parts 141 through 143). Ensure that the water conforms to the bacteriological standards specified in the New Jersey Safe Drinking Water Regulations (N.J.A.C. 7:10-1 et seq.) as well as the Federal Safe Drinking Water Act (40 CFR, Parts 141 through 143). Provide the test results to the Utility.

  10. Thrust Blocks. Install thrust blocks at bends greater than 5 degrees, and at tees, plugs, and valves. Ensure thrust blocks are placed against firm, undisturbed ground. Ensure that thrust blocks do not come in contact with other utilities or structures without the approval of the RE. Place concrete as specified in 504.03.02.D.

651.03.02 Water Pipe, Bridge

Construct water mains on bridges as specified in the Special Provisions.

651.03.03 Water Service Connection

Before performing water service connections, check the condition of the meter pit, and determine if the enclosed meter is operational. Notify the Utility and water service customers at least 5 days in advance of water shut-off. Schedule the work as specified in 651.03.01.A. Determine the location of surface and subsurface structures as specified in 651.03.01.B. Excavate as specified in 651.03.01.C. Install the temporary and permanent water services required to maintain consistent service. Install the corporation stop. Install the continuous length of copper service pipe between the corporation stop and curb stop. Install the curb stop and curb box. Ensure the curb box is set to the proposed final grade. Install and connect customer water service pipe compatible with the existing customer water service pipe. If necessary, relocate the existing water meter and meter pit. Shut off existing services that are to be abandoned, install a plug in the existing curb stop, and remove the existing curb box. Backfill as specified in 651.03.01.G.

651.03.04 Fire Hydrant

Schedule the work as specified in 651.03.01.A. Determine the location of surface and subsurface structures as specified in 651.03.01.B. Excavate as specified in 651.03.01.C. Install the fire hydrant according to AWWA section C502-54. Install the branch connection to the main, including the standard tee, gate valve, and pipe from the main to the hydrant. Provide additional pipe or connections necessary to bypass obstructions or utilities. Place coarse aggregate around the base. Ensure that the fire hydrant assembly is set plumb with the pumper nozzles normal to the face of the curb. Install thrust block as specified in 651.03.01.E. Backfill as specified in 651.03.01.G.

651.03.05 Relocate Fire Hydrant

Remove the existing fire hydrant. Cap the existing branch line. Install the existing fire hydrant as specified in 651.03.04 where shown on the Plans.

651.03.06 Reset Fire Hydrant

Adjust the height of the existing fire hydrant by adding to the vertical connection to the plug to meet the proposed grade. Do not move or disturb the location of the hydrant branch connection to the main.

651.03.07 Reset Water Valve Box

Adjust the height of the existing water valve boxes so that it is set flush with the proposed grade without disturbing the existing valve.

651.03.08 Water As-Built Plan

Upon completion of the water utility work, submit to the RE and to the Utility a scaled as-built plan noting the location of the Items of water utility construction except RESET FIRE HYDRANT and RESET WATER VALVE BOX. On the plan, show stationing, distance references to the curb line, and 3 ties for each valve box, curb box, and hydrant within 50 feet to above-ground physical features. On the plans, show the depth of the water pipe and service connection at a minimum of 100-foot increments along the line or connection. Provide the as-built plans in a format acceptable to the Utility.

651.04 Measurement and payment  back to top


The Department will measure and make payment for Items as follows:
  Item Pay Unit
  ___" DUCTILE IRON WATER PIPE, Class ___ LINEAR FOOT
  ___" DUCTILE IRON WATER PIPE BRIDGE, Class ___ LINEAR FOOT
  WATER SERVICE CONNECTION UNIT
  FIRE HYDRANT UNIT
  RELOCATE FIRE HYDRANT UNIT
  RESET FIRE HYDRANT UNIT
  RESET WATER VALVE BOX UNIT
  Water As-Built plan Lump sum
Additional Reference Material
Item Number List

The Department will measure ___" DUCTILE IRON WATER PIPE by the linear foot including the lengths of tees, sleeves, and valves measured parallel to the water pipe outside the limit of a structure.

The Department will measure ___" DUCTILE IRON WATER PIPE BRIDGE by the linear foot measured parallel to the water pipe within the limits of a structure.

A unit of WATER SERVICE CONNECTION includes both temporary and permanent water service connections needed to provide continued service to a structure. The Department will make payment for each structure as a separate unit of WATER SERVICE CONNECTION.

 

Section 652 – Sanitary Sewers

652.01 Description  back to top

This Section describes the requirements for installing sanitary sewer gravity and force mains, sewer lining, sanitary sewer manholes, sanitary sewer connections, miscellaneous fittings, and testing.

652.02 Materials  back to top


Provide materials as specified:
  Coarse Aggregate (No. 57) 901.03
  Soil Aggregate (I-3) 901.11
  Class B Bedding 909.01.02
  Class C Bedding 909.01.03
  Concrete 903.03
  Mortar 903.08.01
  CLSM 903.09
  Curing Materials 903.10
  Precast Manhole 904.01
  Reinforcement Steel 905.01
  Reinforced Concrete Sewer Pipe 909.02.01
  PVC Sewer Pipe 909.02.03
  Corrugated Steel Sewer Pipe 909.02.06
  Ductile Iron Sewer Pipe 909.02.08
  Castings 909.03
  Epoxy Bedding Compound 909.03.5
  Ladder Rung 909.03.6
  Concrete Block 910.02
  Concrete Brick 910.03
  Preformed Joint Filler 914.01
  Asphalt Cement Waterproofing 919.05

See the Special Provisions for additional materials requirements.

652.03 Construction  back to top

652.03.01 Sewer Pipe

  1. Scheduling of Work. Schedule work as specified in 651.03.01.A.

  2. Existing Utilities and Structures. Comply with 651.03.01.B.

  3. Excavating. Before excavating, sawcut full depth existing pavement and sidewalk. Excavate a trench for placing sewer pipe and appurtenances. Remove any observable rock and boulders that are within 6 inches of the pipe. Obtain RE approval before finishing excavation. If the RE determines that the bottom of the trench is unstable, undercut as directed by the RE and backfill with Class B bedding. Ensure that trenches are kept free of standing water during the installation of sewer pipe. Do not excavate for trenches in embankments until the embankment has been constructed to an elevation of at least 3 feet above the top of the pipe. Do not excavate trenches more than 300 feet in advance of installing the pipe unless approved by the RE.

    Maintain trenches according to 29 CFR 1926. Provide and maintain trench crossings where necessary. For trenches in the traveled way, shoulder and within 30 feet of the outside edge of the shoulder, backfill and restore the pavement structure and match the surrounding condition before opening to traffic. The Contractor may use temporary protection instead of backfilling trenches in the traveled way and shoulder. If using temporary protection, submit working drawings for approval. For trenches not in the traveled way and shoulder, do not leave trenches open overnight unless protected with caution fence.

  4. Handling of Pipe and Accessories. Handle pipe and accessories as specified in to 651.03.01.D. Also store o-rings and gaskets in locations where air temperatures are maintained within the manufacturer’s recommendations.

  5. Installing Sanitary Sewer Gravity and Force Mains. Identify areas where pipe will have less than 3-1/2 feet of cover. Provide the RE with a report of the identified areas in order to obtain the Utility’s approval.

    Use a laser system to control the alignment and grade control of the pipe. Lay pipe with bell ends facing the opposite direction of flow. Lay sewer main pipe in straight lines except as approved by the RE. Adjust the depth of the pipe to pass obstructions, as approved by the RE. Install the pipe so that it is solidly supported by the underlying material over its full length except where recesses have been made for joints. Ensure that interior of the pipe is kept clean and free of intrusion by soil or other foreign material. Protect open ends of the pipe at all times and securely seal the openings with plugs approved by the Utility whenever work is stopped. Remove the plug, inspect, and clean the interior of the pipe before resuming pipe installation. Join pipe according to the manufacturer’s recommendations. Cut pipe according to the manufacturer’s recommendations. Ensure cuts are clean and square. Install plugs, vents, tapping sleeves, valves and miscellaneous fittings. Install tapping valves and insert valves as wet connections with no interruption of flow.

  6. Thrust Blocks. For sewer force mains, install thrust blocks at bends greater than 5 degrees, and at tees, plugs, and valves. Ensure thrust blocks are placed against firm, undisturbed ground. Ensure that thrust blocks do not come in contact with other utilities or structures without the approval of the RE. Place concrete as specified in 504.03.02.D.

  7. Sewer Pipe Testing. After laying and jointing a complete section of pipe between manholes and before backfilling, perform a visual inspection of the pipe by lamping with a light and mirror to show if alignment contains deflection between manholes. Perform the visual inspection in the presence of the Utility inspector and to the Utility’s standards. Also test the pipe as follows:

    1. Gravity Main Sewer Testing. Perform the leakage testing listed in the Special Provisions.

      1. Infiltration Testing. At least 15 day before performing testing, submit a plan to the Utility for approval detailing the proposed method to construct weirs or otherwise measure infiltration, including installation of pipe plugs and methods of temporary pumping to maintain service as necessary. Submit the approved plan to the RE Perform the infiltration testing in the presence of the sanitary sewer inspector and according to the Utility’s standards.

      2. Exfiltration Testing. At least 15 day before performing testing, submit a plan to the Utility for approval detailing the proposed method to construct weirs or otherwise measure exfiltration, including installation of pipe plugs and methods of temporary pumping to maintain service as necessary. Submit the approved plan to the RE. Seal the low end of the section being tested and test the entire section of the system, including manholes, by filling the system with clean water to a minimum of 2 feet above the top of the pipe in the upstream manhole. Measure the amount of water necessary to maintain a constant head of pressure above the pipe for 4 hours. Perform the exfiltration testing in the presence of the sanitary sewer inspector and according to the Utility’s standards.

    2. Force Main Sewer Testing. At least 15 day before performing pressure testing, submit a plan to the Utility for approval detailing the testing. Submit the approved plan to the RE. Plug the force main at the tie-in manhole. Perform hydrostatic pressure testing of the water main according to AWWA Standard C600 in the presence of the Utility inspector using a minimum test pressure directed by the Utility. Maintain the pressure in the pipe for 120 minutes. Demonstrate, to the satisfaction of the Utility, that sanitary sewer force mains exhibit no leaks under pressure.

  8. Backfilling. Symmetrically backfill on each side of the pipe in lifts not exceeding 6 inches thick, loose measurement, and compact with a flat faced mechanical tamper using the directed method as specified in 203.03.02.C. Where bedding is not required, backfill with suitable excavated material that is free from rock larger than 2 inches in diameter. Reuse excavated material as specified in 202.03.07.A. The Contractor may use CLSM as alternate backfill material when backfilling trenches. If using CLSM, install as specified in 601.03.01.F. Restore the existing pavement structure to the original condition or as shown ion the Plans

652.03.02 Sanitary Sewer Pipe, Bridge

Construct sanitary sewer pipe on bridges as specified in the Special Provisions.

652.03.03 Sanitary Sewer Pipe Lining

At least 15 days before beginning the work, submit to the RE and the Utility for approval a plan detailing a method to temporarily transfer the wastewater flow around the section or sections of the sewer being lined. Divert the wastewater flow from an upstream access point and pump the flow to a downstream access point by providing a pump and bypass lines with adequate capacity to handle peak wastewater flow.

Perform sanitary sewer lining by entry from existing manholes. Modify existing manholes to permit sufficient access to perform the work as approved by the RE. Before beginning lining, internally clean new and existing pipe lines so that they are free from internal deposits. Remove pipe obstructions and sewer service projections into the sewer in a manner approved by the Utility. If an obstruction or sewer service connection projection can not be removed internally, perform the removal using an open-cut excavation, and make any necessary pipe repairs in a manner approved by the Utility.

Perform liner installation according to the manufacturer’s recommendations. Ensure that the liner neatly fits the internal circumference of the sewer to be lined. Allow for circumferential stretching during insertions according to the manufacturer’s recommendations. Perform the work to fully impregnate and cure the liner in-place, or to reform the folded liner to fully conform the liner to the pipe interior, depending upon the method used. Monitor the pressures and temperatures at both ends of the pipe where the liner is being reformed to ensure the recommended pressures and temperatures are available to fully form the liner over the entire length of the liner run. Cool the liner and relieve the pressure for the recommended time to maintain the optimum temperatures and pressures to fully form the liner.

Seal the annular space between the newly installed liner and the sewer pipe where the sewer pipe enters and exits each manhole. Finish the seal on the manhole interior with a non-shrink grout. Ensure that the finished liner connection into each manhole has a watertight seal. Reinstall existing sewer service connections into the newly lined pipe.

652.03.04 Sanitary Sewer Service Connections

Comply with 651.03.01.B. Notify the Utility at least 5 days in advance of performing sewer service connections. Where new sewer mains are shown to be constructed, determine the location of existing service connections. Where service connections are not immediately being reconnected, plug the existing service to provide a watertight seal.

Maintain uninterrupted wastewater flow from each existing service connection, and provide a temporary service bypass connection when necessary. Install sanitary sewer service connections using an approved wye, wye saddle, or manhole stub. Install sanitary sewer connections so that they are watertight, according to the manufacturer’s recommendations and the Utility’s standards. Make the connection to the main using an approved flexible adaptor. If connecting to a manhole, and a stub, or knockout bulkhead is not available, connect to the manhole using a coring machine.

652.03.05 Sanitary Sewer Manhole

Construct sanitary sewer manholes as specified in 602.03.02. Paint the outside surface of the manhole walls with 2 coats of asphalt cement waterproofing according to the manufacturer’s recommendations.

Provide watertight manhole castings, unless use of existing castings is specified. The RE will not accept sanitary sewer manholes that are not watertight.

652.03.06 Reconstruct Sanitary Sewer Manhole

Reconstruct sanitary sewer manholes as specified in 602.03.02. Paint the outside surface of the manhole walls with 2 coats of asphalt cement waterproofing according to the manufacturer’s recommendations.

Provide watertight manhole castings, unless using existing castings are specified. The RE will not accept sanitary sewer manholes that are not watertight.

652.03.07 Reset Sanitary Sewer Manhole

Reset sanitary sewer castings as specified in 602.03.03. Paint the outside surface of the manhole walls with 2 coats of asphalt cement waterproofing according to the manufacturer’s recommendations.

Provide watertight manhole castings, unless using existing castings are specified. The RE will not accept sanitary sewer manholes that are not watertight.

652.03.08 Video Inspection of Sewer

Perform video inspection of interior pipelines as specified in 601.03.04. Provide an additional copy of the tape or digital media to the Utility.

652.03.09 Sewer As-Built Plan

Upon completion of the sewer utility work, submit to the RE and to the Utility scaled as-built plans noting the location of all Items of sewer utility construction except RESET MANHOLE, SANITARY SEWER, USING EXISTING CASTING and RESET MANHOLE, SANITARY SEWER, USING NEW CASTING. On the plans, show stationing, distance references to the curb line, and 3 ties for each wye connection, valve, vent, and service connection within 50 feet to above-ground physical features. For gravity sewer mains, show rim, invert elevations, and pipe slopes. On the plans, show the depth of the sewer pipe and service connection at a minimum of 100-foot increments along the line or connection. Provide the as-built plans in a format acceptable to the Utility.

652.04 Measurement and Payment  back to top


The Department will measure and make payment for Items as follows:
  Item Pay Unit
  ___" Ductile Iron SEWER PIPE LINEAR FOOT
  ___" REINFORCED CONCRETE SEWER PIPE LINEAR FOOT
  ___" REINFORCED CONCRETE SEWER PIPE, CLASS ___ LINEAR FOOT
  ___" POLYVINYL CHLORIDE SEWER PIPE LINEAR FOOT
  ___" Ductile Iron SEWER PIPE, BRIDGE LINEAR FOOT
  ___" CORRUGATED STEEL SEWER PIPE LINEAR FOOT
  SANITARY SEWER pipe lining LINEAR FOOT
  SANITARY SEWER Service CONNECTION UNIT
  MANHOLE, SANITARY SEWER UNIT
  MANHOLE, SANITARY SEWER, USING EXISTING CASTING UNIT
  RECONSTRUCTED MANHOLE, SANITARY SEWER, USING EXISTING CASTING UNIT
  RECONSTRUCTED MANHOLE, SANITARY SEWER, USING NEW CASTING UNIT
  RESET MANHOLE, SANITARY SEWER, USING EXISTING CASTING UNIT
  RESET MANHOLE, SANITARY SEWER, USING NEW CASTING UNIT
  VIDEO Inspection of Sewer  LINEAR FOOT
  Sewer As-Built plan Lump sum
Additional Reference Material
Item Number List

The Department will measure ___" REINFORCED CONCRETE SEWER PIPE, CLASS ___ by the linear foot including the tees, valves and bends measured parallel to the sewer pipe outside the limit of a structure.

The Department will measure ___" REINFORCED CONCRETE SEWER PIPE BRIDGE, CLASS ___ by the linear foot measured parallel to the sewer pipe within the limits of a structure.

 

Section 653 – Gas

653.01 Description  back to top

The work describes the requirements for installing gas mains, valves, vents, service lines, and gas valve boxes, and resetting gas valve boxes.

653.02 Materials  back to top


Provide materials as specified:
  Coarse Aggregate (No. 57) 901.03
  Soil Aggregate (I-3) 901.11
  Concrete 903.03
  CLSM 903.09
  Structural Steel 906.01
  Bolts and Bolting Material 908.01
  Class A Bedding 909.01.01
  Class B Bedding 909.01.02
  Class C Bedding 909.01.03
  Timber for Structures 915.04

Provide steel pipe sleeves as according to ASTM A 252 and galvanize according to ASTM A 123.

Provide hot-dip galvanize channel supports, rods, bolts, nuts, washers, inserts, and other hardware required for the permanent installation as according to ASTM A 123 or A 153.

653.03 Construction  back to top

653.03.01 Gas Main

  1. Prequalification. Only a pre-qualified contractor approved by the Utility may construct or relocate gas mains and appurtenances. The Department will list pre-qualified contractors for this work in the Special Provisions. The work restricted to pre-qualified contractors does not preclude the Contractor from performing sawcutting, pavement removal, removal of excess gas, and temporary or final pavement restoration associated with the work of constructing gas mains. Ensure that the work is performed according to the Utility’s General Specifications.

  2. Scheduling Work. Schedule work as specified in 651.03.01.A and according to 49 CFR 192.

  3. Handling and Storing. The Utility will provide and deliver pipe in minimum 20 foot lengths, large fittings, and gas protective steel plate. Transport materials within the Project Limits. Coordinate delivery with the Utility

    Pick up other gas main or service specific materials such as pipe, pipe sleeves, pipe hanger assemblies, expansion joints, and seals between the pipe and sleeves from the Utility at the location specified in the Special Provisions. Store and protect the pipe, and other materials received from the Utility. Support polyethylene pipe every 10 feet during storage and while being transported.

    Return and deliver excess pipe, fitting, and other miscellaneous materials provided by the Utility to the Utility at the location specified in the Special Provisions.

    Obtain material receipts from the Utility when material is being delivered by the Utility or returned to Utility and provide a copy to the RE

  4. Existing Utilities and Structures. Comply with 651.03.01.B.

  5. Excavating. Before excavating, sawcut the full depth of the existing pavement and sidewalk. Excavate a trench for placing gas pipe, valves, services, tees, and appurtenances. Obtain RE approval before finishing excavation. If the RE determines that the bottom of the trench is unstable, undercut as directed by the RE and backfill with Class B bedding. If the material at the bottom of the trench is rock or other hard material, excavate an additional 6 inches of the material below the bottom of the pipe. Ensure that trenches are kept free of standing water during the installation. Do not excavate for trenches in embankments until the embankment has been constructed to an elevation of at least 3 feet above the top of the pipe. Do not excavate trenches more than 300 feet in advance of installing the pipe unless approved by the RE.

    Maintain trenches according to 29 CFR 1926. Provide and maintain trench crossings where necessary. For trenches in the traveled way, shoulder and within 30 feet of the outside edge of the shoulder, backfill and restore the pavement structure and match the surrounding condition before opening to traffic. The Contractor may use temporary protection instead of backfilling trenches in the traveled way and shoulder. If using temporary protection, submit working drawings for approval. For trenches not in the traveled way and shoulder, do not leave trenches open overnight unless protected with caution fence.

  6. Installing Gas Mains. Identify areas where pipe will have less than 3 feet of cover. Provide the RE with a report of the identified areas in order to obtain the Utility’s approval. Use a laser system to control the alignment and grade control of the pipe. Place Class B or C bedding and compact with a mechanical tamper using the directed method as specified in 203.03.02.C. Install the pipe so that it is solidly supported by the bedding over its full length except where recesses have been made at joint locations. Ensure that interior of the pipe is kept clean and free of all intrusion by bedding, soil, or other foreign material. Install elbows and associated fittings. Cut standard elbows of 45 or 90 degrees to match the required elbow shown on the Plans or as required by field conditions. Install insulating joints, valves, valve risers, valves boxes, miscellaneous fittings, insulated locating wire, pipeline markers, and test stations. Maintain a 1-foot minimum clearance between utilities. Coordinate the installation of gas main with other work, and prevent conflicts and interference with existing facilities and proposed construction. Join pipe as follows:

    1. Welding Steel Pipe. At least 15 days before installing gas mains, submit to the RE and to the Utility a copy of the welders’ Performance Qualification Record showing the welder has been tested and approved by the Utility. Perform welding according API Standard 1104. Perform welding in a manner that is acceptable to the Utility.

      Do not tack ground clamps or other devices to the pipe. Repair arc burn damage to the pipe when the depth of the defect is less than 8 percent of the nominal wall thickness by grinding smooth. When the depth of the arc burn physical defect is greater than 8 percent of the nominal wall thickness, remove the defect and the adjacent firth weld. Do not perform welding repairs on gouges, scratches, arc burns or other defects of the pipe. The Contractor may make field repairs of gouges and groves in the parent metal of the pipe by grinding. Do not grind more than 8 percent of the nominal wall thickness of the pipe. Remove dents that contain stress concentrations, such as scratches, gouges, groves, or arc burns by cutting out the damaged portion of the pipe.

      Provide an examination of welds by radiographic (X-ray) inspection by a qualified inspection company approved by the Utility. Deliver the X-ray films and 1 copy of the radiographic inspection report to the RE and to the Utility. Apply or repair pipe coating so that pipe coating passes a holiday detector test. Seal field welds and fittings with Raychem Unisleeve or with a double layer of cold applied, 4-inch-wide, corrosion protective tape as directed by the Utility inspector. Install cathodic protection, including pipe coating, anodes and rectifiers, insulating joints, and test stations. Install the anodes at the lower elevation of the pipe (in or below the water table where possible) and offset the anodes as far as practical from the pipe. Do not place the anodes where other metallic structures such as conduit, cable or pipe is between the main and the anode. Provide temporary blocking to exposed end of gas mains to be abandoned in place using combination beam and column method. Do not backfill around the anodes with Class B bedding. Use excavated material for backfill around the anodes.

    2. Fusing Plastic Pipe. At least 15 days before installing plastic gas mains, submit to the RE and the Utility the names and training qualifications of personnel intended to perform fusing on the work site for approval. Ensure that personnel fusing and inspecting butt fusion joints are certified according to 49 CFR 192. Before fusing plastic pipe, obtain the approval of the Utility for the heat fusion equipment. Fabricate steel to plastic transition fittings using an electric arc welder.

    3. Thrust Restraints and Bell Joint Encapsulation. Install thrust restraints and bell joint encapsulation devices as directed by the Utility before excavating other areas around the main. The number of thrust restraints and bell joint encapsulations is dependent upon field conditions and the location of the tie-in and live gas excavations.

    4. Hot Tap Preparation. When hot taps are performed by the Utility, in the presence of the Utility’s representative, weld a spherical tee, 3-way tee, line stop fitting or other fitting on the existing steel main, or install a split sleeve collar, line stop fitting or other fitting on the existing cast iron main.

  7. Backfilling. Symmetrically backfill on each side of the pipe using Class B bedding in lifts not exceeding 6 inches thick, loose measurement. Compact with a flat faced mechanical tamper using the directed method specified in 203.03.02.C. When the height of 1 foot above the pipe is achieved, place caution tape. Backfill the remainder of the trench with suitable excavated material that is free from rock larger than 2 inches in diameter in lifts not exceeding 6 inches thick, loose measurement. Compact with a flat faced mechanical tamper using the directed method as specified in 203.03.02.C.

    For plastic mains with less than 2 feet cover, enclose with steel pipe or protect with a steel plate. If the pipe is in an area not subject to vehicular traffic, the Department will not require a steel plate. Reuse excess excavated material as specified in 202.03.07.A. Restore the existing pavement structure to the original condition or as shown on the Plans.

  8. Line Stop and Tie-in Assistance. Excavate pits as required to provide access to the Utility for line stops, flow stops, bypass insertions, bagging and venting, hot tops, thrust restraints, purging, and tie-ins. Protect using temporary fencing or steel plates as directed. Maintain the excavation until the Utility has completed its work. Construct a concrete support pad under the pipe at locations requiring a line stop before the arrival of the Utility’s line stop crew. Assist the Utility in handling the pipe by providing sufficient labor and equipment.

  9. Tie-in and Gas Out. Perform cutouts and tie-ins at both ends of the pipe simultaneously. The Utility will purge and cut the pipeline. Once started, continue the work of tie-ins until completed. Keep tie-in excavations open or plated as required until the Utility has completed its work. As necessary, modify standard tie-in pieces to fit connection requirements.

  10. Air-Pressure Test. Perform an air-pressure test on new pipeline including tie-in pieces under the direction and supervision of the Utility. Perform the test according to the pressures and durations provided in the Special Provisions. Locate and repair leaks in a manner that is approved by the Utility. Pig steel gas mains using a scraper barrel pig or a poly pig when testing plastic mains. Ensure that the pig is in a like new condition that is acceptable to the Utility. If using caps or expansion joints, anchor the pipe in a manner that is acceptable to the Utility to prevent any movement during the test.

653.03.02 Installing Gas Mains on Bridges

Install expansion joints in the main as instructed by the Utility representative. Comply with the requirements of 506.03.01 for structural shapes and plates for utility supports. Adjust hangers to provide uniform support of the pipe across the bridge and to align it in the abutment sleeves. Clean and paint the hanger supports as directed by the Utility.

653.03.03 Gas Service Connection

Comply with 651.03.01.B. Perform work associated with the transfer of service including the excavation of 1 tie-in hole for direct burial and transfer installations and 2 tie-in holes for insert installations. Submit to the RE and the Utility the names and training qualifications of personnel intended to install fused or mechanical connections for approval.

Turn off the gas at the service tee using pressure control equipment before cutting the existing service pipe. Disconnect the service pipe inside the building before the meter. Support the meter to avoid stressing the house piping. Install services either by inserting plastic tubing in the existing service or by directly burying plastic tubing or pipe.

  1. Installing Services with Direct Burial of Plastic Pipe. Excavate as specified in 651.03.01.E.

    Install the direct burial plastic service including location wire from the main to the building, fuse the pipe, and assist the Utility to tie the connection into the gas main.

    Backfill above the pipe with Class B bedding in lifts not exceeding 6 inches thick, loose measurement. Compact with a flat faced mechanical tamper. When the height of backfill reaches 2 feet above the service connection, backfill the remainder of the trench with suitable excavated material that is free from rock larger than 2 inches in diameter in lifts not exceeding 6 inches thick, loose measurement. Compact with a flat faced mechanical tamper using the directed method as specified in 203.03.02.C.

    Install a curb shut-off valve and install a meter shut-off valve at the head of the service. Seal the hole in the foundation wall and surround the service pipe with cement or grout. Electrofuse or weld the self tapping tee to the main and connect it to the service using Electrofuse or mechanical fittings.

  2. Installing Services by Plastic Tubing Insertion. Excavate and remove any curb shut-off, offset, swing or service drip that may impede the insertion of the plastic pipe. Ream the existing service from the building to the main. After reaming, air-blow the existing service from the building to the main. Insert the plastic tubing from the main to the building. Install a curb shut-off valve and install meter shut-off valve at the head of the service. Leave the meter shut off valve open with the plug installed. Electrofuse or weld the self tapping tee to the new main and connect it to the new plastic service using Electrofuse or mechanical fittings.

Pressure test the service as required and soap test all fuses and mechanical connections. Perform pressure and soap tests in the presence of the Utility inspector. Release the pressure, tap a self tapping tee, and gas out service through the hose from the meter shut off to the outside of the building until a gas reading of greater than 95 percent is obtained using a combustible gas indicator. Install a tee cap and soap test the cap.

653.03.04 Reset Gas Valve Boxes

Adjust the height of the existing valve box so that it is set flush with the proposed grade without disturbing the existing valve.

653.03.05 Gas As-Built Plan

Upon completion of the work, submit to the RE and to the Utility as-built drawings in a CADD format acceptable to the Utility.

653.04 Measurement and Payment  back to top


The Department will measure and make payment for Items as follows:
  Item Pay Unit
  ___" GAS MAIN LINEAR FOOT
  ___" GAS MAIN, BRIDGE LINEAR FOOT
  GAS SERVICE CONNECTION UNIT
  RESET GAS VALVE BOX UNIT
  gas As-Built plan Lump sum
Additional Reference Material
Item Number List

The Department will make payment for ___" GAS MAINS by the linear foot including the length projecting into the rear face of the abutment.

A unit of GAS SERVICE CONNECTION includes the permanent installation and any required temporary installation for each property.

 


Last Document Correction:
February 1, 2012