Mason Farm Road WWT Digester 1 & 2 Rehabilitation

Project Location: Chapel Hill, NC
Project Type:  Public Utilities
Client: Orange Water and Sewer Authority
Total Contract: $1M+

Prime Contractor for rehabilitation of Digesters 1 and 2, at the Mason Farm Road Waste Water Treatment Plan in Chapel Hill, North Carolina. Project hi-lights include:

  • Retrofit Digester 1 and 2 with new interior tank walls
  • Replace inner and outer membranes of the existing gas holder system, including auxiliary components. Furnish and install new membranes, cable catching system and new lateral low pressure sludge gas (LSG) take-off pipe. Furnish and install new air and gas pressure transmitters, and new laser level instrument
  • Replace the roof between Digester 1 and 2 and the Fermenter, provide concrete repairs inside Digester Building and replace stairs and two doors, and furnish and install new heaters and new gutter system
  • Demolish miscellaneous piping, associated conduits, and two combined boiler/heat exchangers in the Digester Building. Insulate sections of exposed LSG pipe
  • Replace miscellaneous valves; temporarily remove various instruments during tank structural rehabilitation

RTD self-performed 65% of all the work including all formwork, concrete work, sheeting and bracing, excavation & backfills, site work, yard piping, equipment installation and all process piping.