IFB 2025- 04- 002 21st Street Corridor Improvements - due May 15th 2025; DELAYED to May 22nd 2025
The document contains detailed specifications for various construction tasks, including asphalt concrete base course, asphalt concrete, asphalt concrete curb backup material, liquid asphalt cement, liquid asphalt coating, rumble strips, sawcut asphalt concrete pavement, patching, stone matrix asphalt concrete placement, pavement interlayers, thin hot mix asphalt concrete overlay, trench widening, steel and other metal structures, protective coating of metal in structures, maintaining traffic, temporary construction signs, temporary construction pavement markings, temporary pavement markers, temporary pavement message and symbol markings, type 3 barricades, truckmounted or trailermounted attenuators, portable changeable message signs, impact attenuator service, temporary pavement markings, temporary raised pavement markers, temporary pavement message and symbol markings. It outlines measurement, payment, compaction, density, material tolerances, depth, base course, surface, intermediate courses, trench widening, steel, metal, structures, fabrication, assembly, connections, highstrength bolts, protective coating, maintaining traffic, temporary construction signs, retroreflective sign sheeting, temporary overlay panels, aluminum, corrugated polypropylene, polyethylene plastic, aluminumplastic laminate, automated flagger assistance device trailers, arrow board trailers, portable traffic control signal trailers, portable changeable message sign trailers, sign frames, snowplowable raised pavement marker srpm castings, traffic barrier service, guardrail barrier service, terminal treatments, impact attenuator service, temporary pavement markings, temporary raised pavement markers, temporary pavement message and symbol markings, truckmounted or trailermounted attenuators, portable changeable message signs, impact attenuator service, temporary pavement markings, temporary raised pavement markers, temporary pavement message and symbol markings. It also includes details on materials, procedures, acceptance criteria, and warranties. There are specific requirements for different types of trench widening, overlapping of adjacent interlayer rolls, bond strength, and various other aspects of the construction process.