• Earthwork/Trench-B/F Pipeline Contractors- heavy equipment operators and truck drivers
• Concrete Workers and Formwork
• Erosion Control Contractors
• Traffic Control Contractors
• Asphalt Paving Contractors
• Pipeline Contractors -water piping
• Boring/Tunnel Contractors
Material Suppliers:
• Concrete
• Reinforcing steel
• Asphalt concrete
• Structural fill, base rock, bedding
• Water and storm drain pipe
• Erosion control materials
• Ductile Iron Pipe
• Resilient Seat Gate Valves
• Excavation, dewatering and sediment settling system equipment
• Shoring Systems
• Hydrants
• Air Valves
• Casing spacers and end seals
• Steel pipe
• PVC pipe
• Pin brazing material