for Highway Construction Page 509 of 715 SECTION 619 – ILLUMINATION
619.01 Descript ion.
Provide and install illumination of one of the following types:
1.Type 1. Multiple circuit, LED sign lighting.
2.Type 2. Multiple circuit, LED street lighting. Installations may include electrical conduit , wiring, luminaires, poles , pole foundations, and electrical equipment necessary for the construction of a complete lighting system.
619.02 Materials.
Provide materials that bear t he seal of approval of the Underwriters Laboratories, Inc. ( UL), National Electrical Manufacturers Association (NEMA), or other approved testing organizations. Materials must also meet the NEC and local codes and requirements of the connect ing utility. Provide materials as specified in: Concrete ....................................................................................................................................... 502 Nonstructural Concrete ................................................................................................................. 509 Illumination Poles and Bases ................................................................................................... 708.19 Service Poles for Illumination .................................................................................................. 710.06 Pole Keys ................................................................................................................................ 710.07 LED Luminaries ....................................................................................................................... 713.01 Rigid Steel Conduit .................................................................................................................. 713.03 Plastic Conduit ......................................................................................................................... 713.04 Concrete Junction Box es ......................................................................................................... 713.05 Composite Junction Boxes ...................................................................................................... 713.06 Electrical Conductors ............................................................................................................... 713.07 Illumination pole foundations require structural concrete as specified in 502. Electrical service pedestal foundations requi re nonstructural concrete as specified in 509. Submit a list of proposed equipment and materials for approval. For each item listed, include manufacturer’s name, size, and catalog number. Submit nonstandard pole design for approval before use.
619.03 Construction Requirements.
Provide work that meets the NEC and local codes and requirements of the connecting util ity. Where soil conditions allow, excavate for pole foundations to the neat lines of the foundation , and place the concrete directly against the sides of the excavation. Where soi l conditions prohibit this, form the foundations and place the concrete as specified in 502. for Highway Construction Page 510 of 715 Place backfill and compact as specified in 210.
A.Conduit Installation. Resurface with material equal to that removed. Place un derground conduit at least 24 inches below the finished surface. Ensure underground conduit does not conflict wit h poles , guardrail or posts, sign foundations, other underground utilities. Provid e rigid steel conduit for exposed service conduit . Attach conduit to utility company poles as directed by the utility company. Use standard factory fittings (e.g., elbows, bends, tees, couplings) throughout the conduit runs. Make turns in conduit runs by bending the conduit without kinking or flattening by using the largest radius practical or by using standard factory fittings. Obtain approval of conduit installation before backfilling. Separate conduit runs with at least 3 inches of sand or soil cushion. Place underground hazard tape in the fill 12 inches above conduits. Provide tape for AC electrical circuits that is red in color, 6 inches wide and has the legend “Caution Caution Caution Electrical Line Buried Below ” imprinted in black. Provide tape for low voltage or fiber optic cable that is orange in color, 3 inches wide, and without legend.
1.Rigid Steel Conduit . Cut conduit ends square and ream well to remove burrs and rough edges. Thread and cap conduit ends with standard conduit caps until wiring installation is started. When the caps are removed, provide the threaded ends with insulated metallic conduit bushings. Install expansion fittings with at least 4 inches of ex pansion per fitting, where conduit crosses an expansion joint in a structure. When the trench bottom consists of unsuitable material (e.g., rock, hardpan), place conduit on at least a 3 inch bedding of tamped sand or soil. Provide backfill that passes a 3- inch screen.
2.Plastic Conduit . Securely fasten conduit joints together by solvent welding. Bend conduit carefully to avoid damage and with out using an open flame. The Department requires elbows, risers, and bends greater than 45° to be rigid steel. To allow for expansion and contraction of plastic conduit during installation of long runs, leave 1 end unconnected, or insert an O -ring expansion coupling near 1 end of the run until final covering of the conduit is in progress. Cap free ends of conduit to prevent the entry of moisture, dirt, or rocks. Place conduit on at least a 3- inch bedding of tamped sand or soil. Backfill with sand or soil, without rocks or hard lumps, to a compacted depth of 6 inches above and 6 inches to each side of the conduit. The remaining cover over the conduit will pass a 3- inch screen.
B.Junction Box es. Place at least 6 inches of clean sand and gravel, ¾ inch maximum, under junction box es for drainage. Place junction box es subject to traffi c loads on a concrete base . for Highway Construction Page 511 of 71 5 Ensure the outside dimensions of the concrete base is 6 inches larger than the outside dimensions of the junction box with at least a thickness of 4 inches and a drain hole approximately 4 inches in diameter through the center of the base. Do not install the concrete base until conduits under the base have been installed, backfilled, and compacted as specified in 210. Ensure the top of the box is 1 inch above the surrounding ground elevation or is flush with the surrounding surface when located in a sidewalk or roadway.
C.Conductors. Before proceeding to pull wire in underground conduit runs, clean dirt or accumulations of moisture from conduit runs. Use powdered soapstone, talc, or other approved lubricants when inserting conductors in conduit. Splice conductors using approved connectors. Do not splice conductors except in pole bases or junction boxes. Interconnect poles on an underground service system and attach to the service ground by means of a No. 8 American wire gauge (AWG) THWN soft -drawn stranded copper wire.
D.Poles . Fit each anchor bolt with 1 leveling nut and 1 washer below the base plate and 2 nuts and 1 washer above the base plate. Ensure leveling nuts with washer bear against the underside of the base plate befor e tightening the top nuts. Tighten the lower top nut beyond snug- tight as presented in Table 619.03- 1. Table 619.03 -1 – Nut Rotation Beyond Snug -Tight Anchor Bolt Diameter (in) F1554 Grade 36 F1554 Grades 55 and 105 < or = 1.5 inch 1/6 turn 1/3 turn > 1.5 inch 1/12 turn 1/6 turn After the lower top nut has been tightened, tighten the upper top nut against the lower top nut snug- tight. Attach slip base breakaway devices to the foundation anchor bolts with hex nuts and flat washers. Connect the lighting standard to the slip base with high- strength bolts with hexagon nuts and plate washers. Use a plate to keep the bolts in the proper position. Torque the bolts in accordance with the manufacturer’s written instructions. Install the support coupling device in accordance with the manufacturer’s written instructions. Plumb each pole after pole- mounted items and service conductors are in place. Level luminaires in accordance with the manufacturer’s written instruc tions after the pole has been placed. Surround the support couplings with an aluminum skirt fastened with stainless steel sheet metal screws. If it becomes necessary to drill a hole or if the galvanizing is damaged before or during installation, thoroughly wire brush the exposed metal to remove loose and cracked spelter coating, then paint the cleaned area with 2 coats of Formula No. 2 as specified in 707. for Highway Construction Page 512 of 715 E. Field Testing. The Department will require field testing for 14 consecutive days of normal operation. Give written notice to the Engineer when the lighting system is complete and before starting the field test.
619.04 Method of Measurement.
The Engineer will measure acceptably completed work by the lump sum.
619.05 Basis of Payment .
The Department will pay for acceptable quantities at the contract unit prices as follows: Pay Item Pay Unit Illumination , Type ___ ............................................................................. LS Excavation , backfilling, surfacing, and materials are incidental and the cost included in the illumination contract pay items . for Highway Construction Page 513 of 715 SECTION 620 – PLANTING
620.01 Description.
Provide and plant live cuttings, seedlings, and container plants including trees, shrubs, vines, and ground cover as specified.
620.02 Materials.
Provide an equal mix of live cuttings, seedlin gs, container plants , or combinations of and obtain plants except live cuttings, from a local or regional Idaho vendor. The supplier must hold a current and valid Idaho seller/dealer’s license. Certify plants are true to genus and species. Substitutions of other genus or species will not be approved. Match the existing species composition of the surrounding vegetation for species to be planted within wetland areas. Provide materials as specified in: Topsoil ..................................................................................................................................... 213.02 Plants ...................................................................................................................................... 711.06 Commercial Fertilizer ............................................................................................................... 711.07 Soil Conditioner ....................................................................................................................... 711.08 Mulch ....................................................................................................................................... 711.10 Irrigation Water ........................................................................................................................ 711.13 Seeding and Vegetation Special Guaranty .............................................................................. 107.21
620.03 Construction Requi rements.
Perform planting operations between September 15 and May 15, when ground is not frozen and take advantage of favorable planting conditions unless otherwise approved. Clear and remove only vegetation as necessary for construction operation. Grade and level area(s) to be planted before staking or marking planting locations. Mark out and stake tree locations and the general planting area layouts for shrubs, vines, and ground cover. Do not begin planting until the tre e locations and planting site general layouts are approved. Cultivate planting areas for shrubs and vines to at least 4 inches deep. Remove and dispose of weeds and other vegetative growth, rocks larger than 1 inch, and other debris encoun tered in the cultivating work. When excavating holes for planting, keep topsoil separate from subsoil and make loose and friable. Remove and dispose of soils containing a pH greater than 8 or less than 5, stones greater than 1 inch, or other detrimental material encountered in the excavation. A soil auger may be used if approved. Adequately barricade excavated planting holes that are left open when the work is not in progress with appropriate warning devi ces. Sufficiently roughen glaze d surfaces inside planting holes before backfilling. Have the Engineer inspect all plants before planting and determine if plants are acceptable. Install plants approximately 6 f eet on- center in a random pattern as specified after completing final grading and seedbed preparation requirements. Install plants during their dormant stage and allow container plants to remain dormant through the winter. Provide adequate and proper care of plant materials. Adequate an d proper care includes keeping plant materials in a healthy, growing condition by appropriate handling, storing, watering, cultivating, pruning, and spraying.
Source: Idaho Standard Specifications for Highway Construction, 2023 Edition. Pages 545–548 of 768.