Phase 10
I80 Westbound Bridges Over South Expressway, 29th Ave Relocation/Connector
Construction started in May of 2016 with Hawkins Construction
as the Prime Contractor
- Major work included the installation of (1) temporary traffic signals, (1) new permanent signal intersections, (1) railroad grade crossing wayside signal, (1) 140′ high mast tower lighting pole with 48″ diameter drilled shafts at 40’ deep, (25) Lighting poles with 21′ drilled shaft foundations in sandy soils with a high water table, (3162 sq ft) of Type B extruded back sign panels, (1) 100′ overhead sign structure on 36″x90’+ and 48″x90’+ drilled shafts bedded in rock sockets, (22) Lighting pole and footing removals, and (5900’) of electrical circuits.
- The traffic signal installation included mast arm and lighting poles ranging from 25’ to 70’ long with foundations up to 42” diameter by 21’ deep, (15) signal heads, Wavetronix Presence and Advanced detection equipment at both the temporary and permanent signal intersection, GPS Opticom preemption systems, NEMA Signal controller with Battery Backup Systems (BBS), (1400’) of 2” and 3” trenched/bored conduits with related IMSA signal circuit wiring, and a Tesco meter pedestal. Signal foundations were again constructed via drilled shafts meeting the IADOT standards for Wet Shaft construction with polymer and mineral slurries ranging in size from 36″ in diameter by 10′ deep up to 42″ in diameter by 21′ deep
- The Railroad grade crossing signal included (2) gate arm assemblies with precast concrete foundations, a gate house bungalow with equipment by Alstom and GE Transportation, rail track circuits, shunts, and associated relays. All conduits and UG track circuits were required to sit on a bed of 4” sand. Extensive testing per the FRA requirements were completed on everything from the grounding system to the track circuits to the gate house bungalow. Sadler Electric partnered with an outside IRSE Signal Engineer to deliver this signal to BNSF.
