625UTILITY SYSTEMS

625

6-90SECTION 625 – UTILITY SYSTEMS

625.01DESCRIPTION . This work shall consist of furnishing and installing utility sleeves, concrete

encased and direct burial conduit, junction and pull boxes, power drop stanchions, utility vaults, and other utility equipment and components as specified on the Plans. 625.0 2 MATERIALS . Materials shall meet the requirements of the following subsections: Sand Borrow and Cushion ................................ ................................ ......................... 703.03 Brick ................................ ................................ ................................ ........................... 705.01 Mortar, Type II ................................ ................................ ................................ ........... 707.01(c) Mortar, Type IV ................................ ................................ ................................ ......... 707.01(e) Joint Sealer, Hot Poured ................................ ................................ ............................ 707.02(a) Preformed Joint Filler, Cork, and Asphalt -Treated Felt ................................ ............ 707.06 Polyvinyl Chloride (PVC) Waterstop ................................ ................................ ........ 707.08 Reinforced Concrete Pipe ................................ ................................ .......................... 710.01 Acrylonitrile -Butadiene -Styrene (ABS) Plastic Pipe ................................ ................. 710.0 4 Polyvinyl Chloride (PVC) Plastic Pipe ................................ ................................ ......710.0 5 Corrugated Steel Pipe, Pipe Arches, and Underdrains ................................ .............. 711.01 Corrugated Aluminum Alloy Pipe, Pipe Arches, and Underdrains ........................... 711.02 Bar Reinforcement ................................ ................................ ................................ .....713.01 Plastic Pipe, Flexible ................................ ................................ ................................ ..740.01 Rigid Polyvinyl Chloride (PVC) Electrical Conduit ................................ ................. 752.0 6(a) High -Density Polyethylene (HDPE) Electrical Conduit ................................ ............ 752.06(b) PVC Coated Rigid Metal Conduit (RMC) ................................ ................................ .752.06(c) Junction Boxes ................................ ................................ ................................ ........... 752.09 (a) Pull Boxes ................................ ................................ ................................ .................. 752.09(b) Power Drop Stanchion ................................ ................................ ............................... 752.14

Concrete shall conform to the requirements of Section 541 for Concrete, Class B. All wood blocks used as skids shall be oak or maple structural lumber No. 2 Grade or better. All prefabricated casing spacers shall be designed for the intended application and be of the centered restrained type. Stainless steel strapping shall meet the requirements of ASTM A666. Sleeves for power and communication lines shall be non -metallic.

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6-91Steel sleeves shall conform to ASTM A53 and the wall thickness shall be compatible with the specified

buried depth. Carrier pipes shall have restrained joints to allow for future removal of the pipe without having to de - couple the pipe joints. Casing end seals shall be of masonry construction. Modular wall and pipe seals shall be stainless steel hardware or prefabricated casing end seals with stainless steel bands. Pedestals, vaults, handholes, and transformer cabinets shall conform to the requirements of the respective utility company specifications. Pull boxes shall be designed and constructed to support at least an HS-20 loading in accordance with the AASHTO Standard Specifications for Highway Bridges .

625.03GENERAL REQUIREMENTS . The Contractor shall coordinate and work with each utility

company, as necessary, to ensure that the conduit and utility equipment instal led are constructed in accordance with the Plans and the utility company’s specifications.

625.04CONSTRUCTION REQUIREMENTS

including removal and replacement of curbs, sidewalks, paved surfaces, and any other materials necessary to complete the work in accordance with the Contract or as directed by the Engineer. All pavement surfaces to be removed shall be saw -cut to the full pavement depth along the neat lines of the area to be removed. All landscaping and underground utility systems that have been disturbed during construction shall be restored to their original condition upon the completion of the work. Backfill of suitable material shall be placed and com pacted in layers not exceeding 6 inches.

by the Engineer. When the method of installation to be used is not specified or directed by the Engineer, the Contractor may use either trenchless or open -cut methods. Trenchless installation shall be performed in accordance with the requirements of Section 209 . Open -cut installation shall be performed in accordance with the requirements specified for culverts in Section 601 . All pipes shall be positively joined.

625

6-92Unless otherwise specified, any sleeve installed for future use shall be fitted with plugs or caps at

both ends and shall contain a suitable pull wire or pull cord accessible from both ends. The size of utility sleeve specified on the Plans shall be the nominal inside diameter of the sleeve. Carrier pipe for water, sewer, or gas with an outside diameter greater than 2 inches shall be installed in a sleeve that has a n inside diameter at least 12 inches greater than the outside diameter of the carrier pipe. Utility pipe for power, communications, or cable with an outside diameter greater than 2 inches shall be installed in a sleeve that has a n inside diameter at least 4 inches greater than the outside diameter of the utility pipe. For utilities with an outside diameter of 2 inches or less , the inside diameter of sleeves shall be as specified in Table 625.0 4A. TABLE 625.0 4A – MINIMUM SLEEVE DIAMETERS FOR CARRIER OR UTILITY PIPE Carrier or Utility Pipe Min. Inside Diameter of Sleeve (in.) Power lines 4 Telephone lines 4 Cable TV lines 4 Water pipes 6 Water service lines 4 Sewer pipes 6 Gas pipes 6 Fiber optic cables 4 Unless otherwise specified, utility sleeves placed under roadways or drives shall have a minimum cover depth of 5 feet measured from the finished roadway surface. Sleeves shall have a pitch or grade no flatter than 1:400 (V:H) and provisions shall be made for draining moisture away from the sleeve location or as directed by the Engineer. Unless otherwise specified, the Contractor shall install utility sleeves in a straight line with no bends. The installed sleeve shall terminate a minimum of 4 feet outside the face of curb, 4 feet outside the edge of shoulder of the roadway, 4 feet outside the edge of the drive that the sleeve crosses, or 4 feet outside the edge of sidewalk, whichever situation applies.

625 6-93 (c) Installation of Conduit . Conduit shall be installed at the locations shown on the Plans or as directed by the Engineer. Unless oth erwise specified, conduit shall be placed not less than 2 feet below the top of curb in sidewalk areas and not less than 3 feet below the finished grade of pavement when passing under roadways. When conduit is placed below the roadway, it shall be placed i n a utility sleeve. Conduit shall have a pitch or grade no flatter than 1:400 (V:H) and provision shall be made for draining moisture away from pull boxes as directed by the Engineer. Only high density polyethylene (HDPE) plastic pipe conduit shall be use d for underground installations. Where factory bends are not being used, the conduit shall be bent using the longest radius possible, but not less than six times the inside diameter of the conduit, in a manner that will not crimp or flatten the conduit. Not more than three 90° bends or equivalent (270° total) shall be used on a continuous conduit line. If more than 270° in total bends are necessary, then a pull box or junction box shall be installed. Once the conduit lines are completed, any obstructions , including stone and dirt, shall be removed. Damaged conduit shall be removed and replaced at the Contractor’s expense. Conduit may be subjected to a mandrel test at the direction of the Engineer. Unless otherwise specified by the Engineer or the utility, the diameter of the mandrel shall be 1/4 inch less than the diameter of the conduit and shall be a minimum of one conduit diameter in length. Conduit spacers, as approved by the Engineer and the utility company’s inspector, shall be used to ensure separation between the conduits as shown on the Plans. Spacers shall be placed at 6 -foot intervals or as recommended by the project manufacturer. When conduit is to be left empty under the Contract, the Contractor shall furnish and install a pull cord with a min imum pull strength of 5 kips in each conduit. The pull cord shall terminate beyond the end of the conduit in each pull box, or just under the cap at concrete bases for poles. Detectable underground warning tape 6 inches wide shall be placed in the excavate d trench 12 inches to 18 inches below the finished grade for all open cut conduit and sleeve runs. Tape indicating electrical conduit shall be red and tape indicating communication conduit shall be orange.

625

6-94Conduit joints shall be made watertight using b rush-applied cement as recommended by the

manufacturer. Where shown on the Plans, wired conduit may be either pre -wired before the conduit is installed or the wire may be installed after the conduit is installed. The item for wired conduit includes both the conduit and the wires contained within the conduit, however, the wires and the conduit shall not be attached to each other, and the wires shall be readily pulled from the conduit for replacement without excessive effort. Except where otherwise shown on t he Plans, installed conduit shall have a minimum nominal inside diameter of 2 inches or it shall match the size of the existing conduit to which it is being attached. In either case, the installed conduit shall be of sufficient inside diameter to contain w iring of a size such that the voltage drop in the secondary circuits will not exceed 3%. Wired conduits shall have a sufficient inside diameter such that the combined cross -sectional area of the wiring does not exceed the percentage of conduit fill specified in the National Electrical Code . Conduits shall, in accordance with the other requirements of this subsection, contain all the wiring necessary to make the completed system or subsystem to which they are attached function.

that the surface on which the concrete is to be poured is firmly compacted and free from voids, rocks, and rubble. Prior to pouring concrete, the conduit shall be securely anchored to pre vent movement during the pour. Anchors shall be within 2 feet and on each side of a joint, at each end of a bend, and have a maximum spacing between anchors of 10 feet. All conduit placements shall require approval by the Engineer. Any field modifications shall only be done with the approval of the Engineer. When it is expected that there will be an interval of four hours or longer between concrete pours,

reinforcement bars shall be installed across the construction joint. The bars shall be No. 4 and not

less than 6 feet in length. One bar shall be installed in each corner, and between conduits in the top

and bottom of the concrete envelope, 4 inches from the outside surface. Each reinforcement bar

shall extend an equal distance into the two pours of concrete.

The conduit envelope shall be square or rectangular in cross section and shall provide for concrete

thickness over the outside conduits as shown on the Plans.

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The concrete shall be placed carefully so as not to disturb or damage the conduit. The concrete

shall be consolidated as directed by the Engineer to eliminate honeycombing or other defects. The

Contractor shall ensure that all clearances shown on the Plans are maintained during concrete

placement.

To aid in curing, the Contractor may place 6 inches of approved backfill material on the concrete

as soon as the surface is set. However, actual backfilling shall not begin until at least 24 hours after

placement of concrete. In instances where accelerant is used in the concrete, the 24-hour waiting

period for backfill may be reduced by the Engineer.

shown on the Plans or as directed by the Engineer.

Excavation for the junction boxes and pull boxes shall include excavation of an area one foot

outside the box and extending one foot below the finished grade of the bottom of the boxes. One

foot of granular material shall be placed in the excavated area and compacted prior to installation.

Junction boxes and pull boxes shall be constructed so that there is no standing water present.

Additional drainage may be required at the discretion of the Engineer.

All conduits shall enter the junction box through the bottom, not though the side wall. Conduit

may enter pull boxes through the side walls.

All covers for junction boxes and pull boxes covers shall be flush with the boxes and frames.

in accordance with Subsection 203.11(d) by approved mechanical tampers. Hand tampers will not

be permitted. The material shall be brought to the subgrade beneath roadway, grass belt, and any

other paved or gravel areas. For grassed areas outside the highway construction limits, the material

shall be brought to within 4 inches of the finished grade, a 4-inch layer of topsoil placed, and the

area seeded and mulched in accordance with the applicable requirements of Section 651. Paved,

concrete, or gravel areas outside the highway construction limits shall be replaced in kind as

directed by the Engineer. Backfill shall not contain any stones larger than 1-1/2 inches.

or as directed by the Engineer and shall be grounded as shown on the Plans.

Power drop stanchions shall be constructed such that the meter face is oriented facing away from

the roadway.

625

A disconnect breaker for each circuit shall be installed in a locked, rainproof cabinet meeting the

requirements of ANSI/NEMA 250, Type 3R on a stanchion next to or below the meter socket. If

street lighting is present, the traffic signal circuits shall be separate from the street lighting circuits.

Disconnect breakers shall be labeled to indicate which circuit they control. All meter disconnects

shall have a bypass.

the utility for the Contractor to install and shall be placed at the locations shown on the Plans or as

directed by the Engineer. All work installing pedestals, vaults, and pads shall conform to the

respective utility standards and requirements.

625.05METHOD OF MEASUREMENT. The quantity of Sleeves for Utilities, Concrete Encased

Conduit, Direct Burial Conduit, and Wired Conduit of the type and size specified to be measured for

payment will be the number of linear feet installed in the complete and accepted work, measured to the

nearest foot along the center of the sleeve or conduit.

The quantity of Power Drop Stanchion; Junction Box; Pull Box, Single; Pull Box, Double; Utility

Pedestal; Communications Vault; Electric Vault; and Utility Pad to be measured for payment will be the

number of each installed in the complete and accepted work.

625.06BASIS OF PAYMENT. The accepted quantity of Sleeves for Utilities of the type and size

specified will be paid for at the Contract unit price per linear foot. Payment will be full compensation for

fabricating, furnishing, transporting, handling, saw-cutting, and placing all materials, including pull wire

and end caps, and for furnishing all labor, tools, equipment, and incidentals necessary to complete the

work.

The accepted quantities of Concrete Encased Conduit and Direct Burial Conduit of the type and size

specified will be paid for at the Contract unit price per linear foot. Payment will be full compensation for

furnishing, transporting, handling, and placing the materials specified, including conduit, conduit spacers,

transition couplings, elbows, and other fittings; caps, plugs, pulling wire, bedding material, concrete

encasement, rebar, and all other material needed for a complete concrete encased or direct burial conduit

system; backfill; placing of concrete; and for furnishing all labor, tools, equipment, and incidentals

necessary to complete the work.

The accepted quantity of Wired Conduit of the size specified will be paid for at the Contract unit price per

linear foot. Payment will include both the installed conduit and the wiring inside the conduit.

The accepted quantities of Power Drop Stanchion; Junction Box; Pull Box, Single; and Pull Box, Double,

will be paid for at the Contract unit price for each. Payment will be full compensation for furnishing and

installing the materials specified, as well as any excavation, granular material, and any additional drainage

pipes needed.

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The accepted quantities of Utility Pedestal, Electric Vault, Communications Vault, and Utility Pad will be

paid for at the Contract unit price for each. Payment will be full compensation for transporting, handling,

and placing the materials specified; for any coordination with the utility company; excavation, furnishing

and placing any subbase material needed; furnishing, and installing grounding material as needed,

furnishing and installing any drainage needed; and all materials, tools, labor, equipment, and incidentals

needed to complete the work.

The cost of temporary pavements patches required for work under this section will be considered

incidental to the applicable item.

Payment will be made under:

Pay Item Pay Unit

625.1000 Sleeves for Utilities, HDPE ......................................................................Linear Foot

02 Sleeves for Utilities, HDPE, 2 Inch ..........................................................Linear Foot

04 Sleeves for Utilities, HDPE, 4 Inch ..........................................................Linear Foot

06 Sleeves for Utilities, HDPE, 6 Inch ..........................................................Linear Foot

08 Sleeves for Utilities, HDPE, 8 Inch ..........................................................Linear Foot

10 Sleeves for Utilities, HDPE, 10 Inch ........................................................Linear Foot

12 Sleeves for Utilities, HDPE, 12 Inch ........................................................Linear Foot

14 Sleeves for Utilities, HDPE, 14 Inch ........................................................Linear Foot

16 Sleeves for Utilities, HDPE, 16 Inch ........................................................Linear Foot

18 Sleeves for Utilities, HDPE, 18 Inch ........................................................Linear Foot

20 Sleeves for Utilities, HDPE, 20 Inch ........................................................Linear Foot

22 Sleeves for Utilities, HDPE, 22 Inch ........................................................Linear Foot

24 Sleeves for Utilities, HDPE, 24 Inch ........................................................Linear Foot

625.2000 Sleeves for Utilities, PVC .........................................................................Linear Foot

02 Sleeves for Utilities, PVC, 2 Inch .............................................................Linear Foot

04 Sleeves for Utilities, PVC, 4 Inch .............................................................Linear Foot

06 Sleeves for Utilities, PVC, 6 Inch .............................................................Linear Foot

08 Sleeves for Utilities, PVC, 8 Inch .............................................................Linear Foot

10 Sleeves for Utilities, PVC, 10 Inch ...........................................................Linear Foot

12 Sleeves for Utilities, PVC, 12 Inch ...........................................................Linear Foot

14 Sleeves for Utilities, PVC, 14 Inch ...........................................................Linear Foot

16 Sleeves for Utilities, PVC, 16 Inch ...........................................................Linear Foot

18 Sleeves for Utilities, PVC, 18 Inch ...........................................................Linear Foot

20 Sleeves for Utilities, PVC, 20 Inch ...........................................................Linear Foot

22 Sleeves for Utilities, PVC, 22 Inch ...........................................................Linear Foot

24 Sleeves for Utilities, PVC, 24 Inch ...........................................................Linear Foot

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Pay Item Pay Unit

625.3000 Sleeves for Utilities, Steel .........................................................................Linear Foot

02 Sleeves for Utilities, Steel, 2 Inch .............................................................Linear Foot

04 Sleeves for Utilities, Steel, 4 Inch .............................................................Linear Foot

06 Sleeves for Utilities, Steel, 6 Inch .............................................................Linear Foot

08 Sleeves for Utilities, Steel, 8 Inch .............................................................Linear Foot

10 Sleeves for Utilities, Steel, 10 Inch ...........................................................Linear Foot

12 Sleeves for Utilities, Steel, 12 Inch ...........................................................Linear Foot

14 Sleeves for Utilities, Steel, 14 Inch ...........................................................Linear Foot

16 Sleeves for Utilities, Steel, 16 Inch ...........................................................Linear Foot

18 Sleeves for Utilities, Steel, 18 Inch ...........................................................Linear Foot

20 Sleeves for Utilities, Steel, 20 Inch ...........................................................Linear Foot

22 Sleeves for Utilities, Steel, 22 Inch ...........................................................Linear Foot

24 Sleeves for Utilities, Steel, 24 Inch ...........................................................Linear Foot

625.4000 Concrete Encased Conduit ........................................................................Linear Foot

04 Concrete Encased Conduit, 1 to 4 Conduits .............................................Linear Foot

08 Concrete Encased Conduit, 5 to 8 Conduits .............................................Linear Foot

12 Concrete Encased Conduit, 9 to 12 Conduits ...........................................Linear Foot

625.5000 Direct Burial Conduit ................................................................................Linear Foot

04 Direct Burial Conduit, 1 to 4 Conduits .....................................................Linear Foot

08 Direct Burial Conduit, 5 to 8 Conduits .....................................................Linear Foot

12 Direct Burial Conduit, 9 to 12 Conduits ...................................................Linear Foot

625.6000 Wired Conduit ...........................................................................................Linear Foot

02 Wired Conduit, 2 Inch...............................................................................Linear Foot

03 Wired Conduit, 3 Inch...............................................................................Linear Foot

04 Wired Conduit, 4 Inch...............................................................................Linear Foot

06 Wired Conduit, 6 Inch...............................................................................Linear Foot

625.7000 Power Drop Stanchion ..............................................................................Each

10 Junction Box .............................................................................................Each

21 Pull Box, Single ........................................................................................Each

22 Pull Box, Double .......................................................................................Each

30 Utility Pedestal ..........................................................................................Each

40 Communications Vault .............................................................................Each

45 Electrical Vault .........................................................................................Each

50 Utility Pad .................................................................................................Each

628

6-99SECTION 628 – SANITARY SEWER SYSTEMS

628.01DESCRIPTION . This work shall consist of the construction or reconstruction of sanitary sewer

lines and appurtenances.

628.02MATERIALS . Materials shall meet the requirements of the following subsections:

Granular Backfill for Structures ................................ ................................ ................. 704.08 Sewer Brick ................................ ................................ ................................ ................ 705.01(b) Rubber Gaskets ................................ ................................ ................................ .......... 707.09 Acrylonitrile -Butadiene -Styrene (ABS) Plastic Pipe ................................ ................. 710.0 4 Polyvinyl Chloride (PVC) Plastic Pipe ................................ ................................ ......710.0 5 Ductile Iron Pipe, Cement Lined ................................ ................................ ............... 740.05 Concrete shall conform to the requirements of Section 541 for Concrete, Class B, unless otherwise specified. Sleeves shall conform to the requirements of Section 625 . 628.0 3 GENERAL REQUIREMENTS . Operation of existing sanitary sewer facilities shall not be interrupted without prior written approval of the Engineer. When existing underground utilities not scheduled fo r removal or abandonment are encountered in the excavation, they shall be adequately supported and protected from damage. Any damage to utilities shall be repaired promptly in accordance with Subsection 107.1 2 at no additional cost to the Agency. The Contractor shall be responsible for the unloading, storing, hauling, and distribution of all materials. All materials that are damaged, destroyed, or lost during and after unloading shall be replaced at the Contractor’s expense. All pipes , pipe fittings, and accessories shall be handled to avoid shock. Pipes having factory -applied joint material shall be stacked and blocked to prevent damage to the joint material. Material not needed for immediate use shall be safely stored at places provided by the Con tractor and approved by the Engineer. The Contractor’s attention is called to the fact that sewer pipe and fittings are comparatively brittle. Care shall be taken in handling and laying to avoid damaging the pipe and fittings. The locations of all pipes sh all be approved by the Engineer. When directed by the Engineer, the Contractor shall remove, replace, or rework all sewer piping and appurtenances that do not meet the requirements of this section. The Contract or shall perform all remedial measures at no a dditional cost to the Agency.