Specifications include, but are not limited to: 15-01501 ASPHALT SURFACING AND ASPHALT RECYCLING EQUIPMENT 15-02001 REMOVAL OF EXISTING STRUCTURES 15-03001 CEMENT TREATED BASE 15-04002 STRUCTURAL CONCRETE 15-04003 ON GRADE CONCRETE 15-04005-R03 GENERAL CONCRETE 15-05003 PORTLAND CEMENT CONCRETE PAVEMENT (QC/QA) 15-06010 HOT MIX ASPHALT (HMA)-COMMERCIAL GRADE 15-07003-R04 STRUCTURAL STEEL FABRICATION 15-07004-R02 STRUCTURAL METALS FABRICATION 15-07005-R02 QUALIFICATION OF FIELD WELDERS 15-07007-R01 DRILLED SHAFT (SPECIAL) 15-07011-R01 CONCRETE STRUCTURE CONSTRUCTION 15-08005 DITCH LINING 15-08010-R01 PERMANENT SIGNING 15-08011-R02 PAVEMENT WIDENING, SHOULDERING AND PAVEMENT EDGE WEDGE 15-08015 CONTRACTOR CONSTRUCTION STAKING 15-08017 FLOWABLE FILL 15-08018 MAINTENANCE AND RESTORATION OF HAUL ROADS 15-08019-R02 WORK ZONE TRAFFIC CONTROL & SAFETY.