751REHABILITATION OF EXISTING ROADWAY LIGHTING

658

** either Roadway or High Mast *** conduit size and type **** size of conductors ***** number and size of conductors REHABILITATION OF EXISTING ROADWAY LIGHTING

751.01Description

This work shall consist of rehabilitating existing roadway lighting systems to the extent indicated on the plans. All work shall be performed with the requirements of Section 750 and as shown on the plans. The structural requirements (design and materials) for roadway lighting are addressed in

751.02Materials

All material requirements given in Article 750.02, including submittals, shall apply to the rehabilitation work unless noted otherwise on the plans.

751.03Construction Requirements

The requirements for the rehabilitation of a roadway lighting system will be shown on the plans. All of the construction requirements given in Article 750.03, including the requirements for submittals, testing, and guarantees, shall be applicable to the rehabilitation work unless noted otherwise on the plans.

751.04Method of Measurement

All rehabilitation of existing roadway lighting system items with the exception of 751-M will be measured per each by the appropriate items complete, in place, acceptably installed and operational. For Pay Item 751-C, Testing Circuit Insulation, each circuit shall be separate and be measured per each. Pay Item 751-M will be measured per lump sum.

751.05Basis of Payment

The accepted rehabilitation of existing roadway lighting, measured as noted above, will be paid for at the contract unit price bid. This price will be full compensation for furnishing all materials, installation, labor, equipment, tools and incidentals necessary to complete these items of work in accordance with the following:

lighting control center and installation at a new location. A lighting control center shall include switches, circuit breakers, contactors, fuses, enclosure, photoelectric controller, control transformer, interior light, interior receptacle, ground rod, incoming service conductors, conduit, anchor bolts, terminal strips, and miscellaneous hardware. This work also includes the removal of an existing concrete pad and installation of a new concrete pad for the lighting control center, and installation of a new aluminum identification plate.

interior components shall include switches, circuit breakers, contactors, control transformer, fuses, photoelectric controller, control transformer, interior light, interior receptacle, ground rod, terminal strips and miscellaneous hardware.

instruments, test preparation, test measurements, recording test readings, locating and identifying causes for low readings, report preparation, and other related miscellaneous services.

luminaires, luminaire support arms, pole base breakaway devices, individual lowering devices, roadway luminaire lowering device system (a complete lowering device assembly or any individual component of the lowering device), surge arresters, ballasts, igniters, lamps, fuse holders, fuses, pole wiring cables and connectors, portable power units, power cord sets, and miscellaneous hardware.

include the high mast lowering device system (a complete lowering device assembly or any individual REHABILITATION OF EXISTING ROADWAY LIGHTING 659

component of the lowering device), pole wiring cables and connectors, luminaires, ballasts, lamps, igniters, portable power units, power cord sets and miscellaneous hardware.

removal of the existing numbers, and the installation of a new eight (8) place holder with eight (8) alphanumeric characters.

shall include loading, transporting, unloading, and uninstalling poles, luminaires, luminaire support arms, pole base breakaway devices, high mast lowering devices, roadway luminaire lowering devices, individual lowering devices, lighting control centers, surge arresters, ballasts, igniters, lamps, fuse holders, fuses, pole wiring cables and connectors, or miscellaneous hardware owned by the State.

loading, transporting, unloading, and installing poles, luminaires, luminaire support arms, pole base breakaway devices, high mast lowering devices, roadway luminaire lowering devices, individual lowering devices, lighting control centers, surge arresters, ballasts, igniters, lamps, fuse holders, fuses, pole wiring cables and connectors, or miscellaneous hardware owned by the State.

include the loading, transporting, unloading, and installation of complete luminaire assemblies or high mast luminaire assemblies. The complete assemblies shall the pole, luminaires, luminaire support arms, high mast, roadway luminaire or individual lowering devices, pole base breakaway devices, lamps, pole wiring cables and connectors and miscellaneous hardware.

reinforced concrete foundation or an auger base with drilling and backfilling, concrete pad, reinforcing steel, conduit and elbows, anchor bolts, and mulching and seeding the disturbed ground.

head or other manufactured single luminaire unit, and shall include any hardware required to mount the luminaire to the pole or lowering device.

include loading, transporting, unloading, and uninstalling poles, luminaires, luminaire support arms, pole base breakaway devices, lighting control centers, high mast lowering devices, roadway luminaire lowering devices, individual lowering devices, surge arresters, ballasts, igniters, lamps, fuse holders, fuses, pole wiring cables and connectors, or miscellaneous hardware owned by the State.

abandoned electrical conductors and/or conduits including wire, splices, couplings and terminations as indicated on the plans, including labor, equipment, services, transportation and all appurtenances.

shall include lighting poles, luminaires, luminaire support arms, pole base breakaway devices, lighting control centers, high mast lowering devices, roadway luminaire lowering devices, individual lowering devices, surge arresters, ballasts, igniters, lamps, fuse holders, fuses, pole wiring cables and connectors, or miscellaneous hardware owned by the State.

751-A Relocate Existing Lighting Control Center (1) - per each 751-B Replace (3) - per each 751-C Testing Circuit Insulation - per each 751-D Replace (4) - per each 751-E Replace High Mast (5) - per each 751-F Renumber Luminaire Poles – per each 751-G Remove and Store (6) - per each 751-H Install State Property (6) - per each 751-I Install State (7) - per each 751-J Remove Luminaire Pole Foundation, (2) - per each 751-K Replace (8) – per each 751-L Remove (6) - per each 751-M Remove (9) – per Lump Sum 751-N Modification of Existing (6) - per each

ELECTRICAL CONDUITS AND DUCTS UNDER ROADWAYS 660

Electric Cell, Test Switch, Terminal Strip or Ground Rod

Arrester, Breakaway Fuse Holder, Fuse in Pole Base, Roadway Luminaire, 5 Amp Fuse, Igniter, H.P.S. Lamp, Fusible Plug, Distribution Block, Pole Cable, Submersible Splice Kit, Ballast or Starter

PowerUnit, Clevis Plate with Hoisting Cable, Winch and Mounting Plate, Motor Mounting Bracket, Head Frame Roller Assembly, Latch Barrel Assembly, Latch Pin, Power Cord, Luminaire, Ballast, or Lamp

Terminal Strip, Photo Electric Receptacle, Service Pole, Lighting Pole, Luminaire Support Arm, Transformer Base, Surge Arrester, Fuse Holder, Roadway Luminaire, Roadway Luminaire Assembly, High Mast Luminaire, High Mast Luminaire Assembly, H.P.S. Lamp, Roadway Luminaire Lowering Device System, High Mast Head Frame Assembly, High Mast Mounting Ring Assembly, High Mast Clevis Plate with Hoisting Cables, Winch and Mounting Plate, Power Cord, electrical junction box, etc.

ELECTRICAL CONDUITS AND DUCTS UNDER ROADWAYS

756.01Description

This Section shall cover the work of furnishing and installing electrical conduits and ducts as detailed by the plans and these specifications. The installation shall include placement of the conduit at the location shown on the plans or directed by the Engineer. All electrical conduits installed under this Section shall be encased, with the kind of encasement depending on the type of installation as follows:  Type 1 installation - duct installed by open trench method and having a concrete encasement.  Type 2 installation - conduit installed by an approved jacking or boring procedure and having a steel pipe encasement.  Type 3 installation - conduit or duct installed by open trench method and having a bituminous plant mix backfill and surface treatment (when required).  Type 4 installation - conduit installed by open trench method, having a pipe encasement as shown on the plans, and backfilled as shown on the plans.  Type 5 installation - duct installed by a precision directional boring method as a high-density polyethylene (HDPE) encasement.

756.02Materials

Materials shall meet the appropriate requirements of Division 800, Materials, and the requirements noted in this Article. Conduit inside of encasement shall meet the requirements of the respective sections in Division 800, Materials, based on the primary use of the conduit (i.e. Intelligent Transportation Systems [ITS], Traffic Signals, or Roadway Lighting). Metal encasement pipe shall meet the requirements of Section 862. Concrete used to encase conduit in a Type 1 installation shall be Class A concrete meeting the requirements of Section 501. All electrical equipment shall conform to the standards of the National Electrical Manufacturers' Association (N.E.M.A.), or Underwriters Laboratory, whichever is applicable. Workmanship and materials shall conform to the requirements of the National Electrical Codes, National Electrical Safety Code and with any local codes or ordinances governing electrical installations. All materials and equipment shall be new, except where the plans specifically provide for re-using existing equipment. ELECTRICAL CONDUITS AND DUCTS UNDER ROADWAYS 661

If requested by the Engineer, the Contractor shall submit samples for inspection and approval of the proposed substitute item and bear any extra costs of evaluating the quality of the materials. All lists shall be submitted in quintuplicate for checking and approval. The Department will not be liable for any materials purchased or work done or any delay incurred prior to such approval. Failure of the Engineer to note unsatisfactory material as received will not relieve the Contractor from responsibility. Omissions from the drawings and specifications, or the misdescription of details of work which are evidently necessary to carry out the intent of the drawings and specifications, or which are customarily performed, shall not relieve the Contractor from performing such omissions and details of work, but they shall be performed as if fully and correctly set forth and described in the drawings and specifications. In any case of discrepancy in figures, catalog numbers, descriptions in the drawings or in the specifications, the matter shall be promptly submitted to the Engineer who shall promptly make a determination in writing. Any adjustment by the Contractor shall be at the Contractor's own risk and expense. For a Type 3 installation, the trench backfill shall be ALDOT #100 concrete sand and Bituminous Concrete Plant Mix, ALDOT 429, as shown on the plans. For a Type 4 installation, the trench backfill shall be as shown on the plans. For a Type 5 installation, the encasement duct shall be high-density polyethylene (HDPE). The duct shall meet the requirements given in ASTM F 2160, "Standard Specification for Solid Wall High Density Polyethylene (HDPE) Conduit Based on Controlled Outside Diameter (OD)". The duct shall be Schedule 80 or DR 11. The color of the duct shall be in compliance with the recommendations of the American Public Works Association for the use of the ULCC Uniform Color Code. The color of ducts for all Roadway Lighting purposes shall be black with longitudinal red striping. The color of ducts for ITS purposes shall be black with longitudinal red striping where electrical conductors are included, or black with longitudinal orange striping where communications (e.g., fiber optic cable, etc.) are included. The color of ducts for Traffic Signals purposes shall be black with longitudinal red striping; black with longitudinal orange striping may be permitted with the Area’s approval and for Traffic Signal purposes only. Any duct on the local Utility’s side of any service disconnect (whether be for ITS, Traffic Signals, or Roadway Lighting) shall be colored as required by the local Utility. Where both communications and electrical conductors are included within the same duct, the color of the duct shall be black with longitudinal red striping. The red or orange longitudinal striping on each duct shall be at least three stripes spaced at equal distances apart on the circumference of the duct. The stripes shall be an integral part of the duct material. Tape and paint stripes will not be accepted for installation. Where black with longitudinal striping is not readily available, solid red or orange (depending on the purpose) is permitted. For projects where the final maintaining authority upon acceptance is to be someone other than ALDOT, the Contractor may be provided an alternative color scheme for ducts based on their requirements.

756.03Construction Requirements

All construction and installation of duct or encasement for electrical conduits shall be done under direction of specially qualified supervisors. All workmanship shall be in accordance with the latest accepted standard of the industry, as determined by the Engineer. Upon completion of the contract, the Contractor shall deliver to the Engineer a corrected plan showing in detail the actual location and depth of ducts, encasement and conduits. Improvements, such as sidewalks, curbs, gutters, Portland cement concrete and asphaltic concrete pavement, bituminous surfacing, base material, and any other improvements broken or damaged by the Contractor, shall be replaced or reconstructed with the same kind of materials as found on the work, or with materials of equal quality. The new work shall be left in a serviceable condition satisfactory to the Engineer. Whenever a part of a square or slab of existing concrete sidewalk or driveway is broken or damaged, the entire square or slab shall be removed and the concrete reconstructed as above specified. The outline of all areas to be removed in Portland cement concrete sidewalks and pavements shall be cut to a minimum depth of 1.5 inches {40 mm} with a saw, prior to removing the sidewalk and pavement materials. Cut for the remainder of the required depth may be made by a method satisfactory to the Engineer. Cuts shall be neat and true with no shatter outside the removal area.

The excavations required for the installation of conduit or ducts shall be performed in such a manner as to cause the least possible injury to the street, sidewalks, and other improvements. The trenches shall not be excavated wider than necessary for the proper installation of the electrical appliances and foundations. Excavating shall not be performed until immediately before installation of ELECTRICAL CONDUITS AND DUCTS UNDER ROADWAYS 662

conduit or ducts and other appliances. The material from the excavation shall be placed in a position where the least damage and obstruction to vehicular and pedestrian traffic, and the least interference with the surface will occur. All surplus excavated material shall be removed and disposed of by the Contractor, as directed by the Engineer. Excavations after backfilling shall be kept well filled and maintained in a smooth and well drained condition until permanent repairs are made. At the end of each day's work and at all other times when construction operations are suspended, all equipment and other obstructions shall be removed from that portion of the roadway open for public travel. Coordination of this type work with regular roadway or bridge work will be of prime importance to prevent undue damage to completed items of work or existing facilities. Any damage to existing facilities caused by the installation of the conduit or ducts shall be repaired by the Contractor at no additional cost to the State.

All conduits installed under paved areas shall be encased in steel pipe. Installation of the encasement shall be made prior to placement of the pavement or it shall be jacked or bored through the roadbed under the pavement providing a minimum cover of 30 inches {750 mm}. The jacking or boring procedure and equipment shall be such that placement of the casement shall be accomplished without producing an unsupported opening through the roadbed between the established ends of the required length of encasement. In no event should encasement lengths be less than the distance between shoulder limits of a roadway. The drilling and mud bore method will be acceptable provided the requirements noted in Subarticle 730.03(a) are complied with.

All conduits installed under paved areas shall be encased in HDPE duct. Installation of the encasement shall be precision directional bored through the roadbed under the pavement at the depth shown on the plans or as approved by the Engineer. The precision directional boring procedure and equipment shall be such that placement of the encasement shall be accomplished without producing an unsupported opening through the roadbed between the established ends of the required length of encasement. In no event should encasement lengths be less than the distance between shoulder limits of a roadway. The encasement shall be installed by drilling a hole with an open type bit that leaves the cuttings in place. A gel-forming colloidal drilling fluid consisting of at least 20%* high grade carefully processed Bentonite may be used to consolidate cuttings of the cutting bit, seal the walls of the hole and furnish lubrication for subsequent removal of cuttings and installations of the encasement immediately thereafter. In this method, when drilling through a dense formation, cuttings may be partially removed from the hole in 3 foot {0.9 m} plugs by use of compressed air as drilling progresses. However, in low density soils of a sandy or silty nature, a plug shall be installed in the mouth of the bore (hole) to prevent the movement of any cuttings from the hole until immediately before installation of the encasement. No bit larger than 3 inches {76.2 mm} in diameter shall have holes therein larger than 5/16 inches {8 mm} in diameter through which drilling fluid is forced during boring. The encasement shall be installed immediately after the boring hole is completed. In no case will water be used to flush cuttings from the drill hole. The cuttings shall remain in the bore hole except as previously provided for as drilling progresses so as to consolidate them to support the bore wall. The filter cake which is formed by the cuttings and drilling fluid prevents cave-in or sloughing of the drill hole. On completion of the boring, the hole will be swabbed out by pulling through the hole the encasement attached to a suitable swab. Violation of any of the above provisions by the Contractor will result in the suspension of work. (Note: By Volume. For instance, 20 gallons {20 L} Bentonite to 80 gallons {80 L} of water.)

756.04Submittals

The contractor shall transmit Material Submittals in accordance with Subarticle 105.02(d) “Submittals for Traffic Design”. Submittals shall consist of material and equipment listings along with supporting documentation as specified in Item 105.02(d)1 “Preparation of Submittals” and these specifications. Material Submittals for this specification section shall be transmitted to the designated Working Group: Design Bureau’s Traffic Engineering Division for their review and approval. The Working Group’s email address is TrafficDesignSubmittals@dot.state.al.us.