CJS has provided engineering services for clients throughout the region. Our projects have included planning level efforts such as routing studies and Preliminary Engineering Reports up through final design, bid, award, and construction administration. The projects we undertake include all facets of the collection and distribution conveyance system with pipeline diameters ranging in size from 2-inch to 96-inch in both heavily urban areas and forested cross-country easements. Clients have entrusted us to perform on large CIP projects as well as on multiple multi-year on-call engineering services contracts.

Water

At CJS Conveyance we have a wealth of experience in the evaluation, design, and construction of water distribution and transmission systems.

This experience includes serving multiple clients in need of implementing water main replacement projects for aging water systems with cast iron, ductile iron, galvanized, and asbestos cement (AC) pipes. We also bring years of experience in evaluation and design of new water distribution and transmission systems for the expansion of existing systems to provide reinforcement, establish pressure zones, serve new development, and support future growth area.
Our evaluation and design experience include elevated and ground storage tanks, control valving, potable and raw water wells, water booster pump stations, and upgrades to existing pumping systems. Whether the need is to design an on-site water distribution system, elevated or ground storage tank, offsite water main extension, and/or booster pump station, we can provide the full range of engineering services.
Our experience for water main system design includes water main ranging from small diameter piping to 42-inch water transmission mains. Elevated tank design experience includes multiple tank styles with storage volumes ranging from 250,000 gallons to 3.0 million gallons. Booster pumping station designs range from 300 gpm duplex stations to 5.0 mgd stations with multiple duty pumps.

  • Master planning and engineering studies
  • Water main replacement and trenchless rehabilitation
  • Water main extensions for transmission and distribution
  • Booster pump station assessment and design
  • Elevated and ground storage tank sizing and design
  • Master meter systems and control valves
  • Potable groundwater well systems
  • Hydraulic modeling
  • Water hammer/transient surge analysis and control
  • Trenchless crossings for railroads, highways, and wetland/surface waters

Specialties

Wastewater

Our team specializes in the evaluation, design, and construction of wastewater collection and conveyance systems.

We have engineered wastewater collection systems for residential, commercial, and industrial developments and larger systems for local governments in North Carolina and Virginia.

For larger systems, we have extensive experience in sewer basin studies and gravity interceptor designs for larger municipalities such as the City of Raleigh, City of Durham, and the Orange Water and Sewer Authority (OWASA).
Our pump station design experience includes wet submersible stations, vacuum-prime station, self-priming stations, vertical turbine sewage handling stations, and dry-pit/wet-pit submersible stations.
Our force main and gravity sewer design experience includes PVC, Ductile Iron, Fiberglass Reinforced Pipe (FRP/GRP), RCP, and HDPE with specific expertise in trenchless design including horizontal directional drilling (HDD), horizontal auger boring (bore and jack) and tunneling (pipe jacking, microtunneling, pipe ramming).
Finally, our experience includes gravity sewer and force main rehabilitation evaluations using PACP/MACP/LACP methodology and design using a variety of methods including CIPP, slip-lining, centrifugally cast coating systems, and pipe bursting. Our gravity sewer design experience includes local sewer collection systems for annexations and new development as well as larger diameter gravity sewer systems with pipe sizes up to 96-inch diameter interceptors. We have designed wastewater pump stations ranging in firm capacity from 100 gpm to 9.0 MGD with force main designs ranging in diameter from 4-inch to 36-inch.
Our team has studied and designed several low-pressure sewer systems in project areas that could not be served in part or entirely by gravity sewer collection systems. These low-pressure systems have included miles of low-pressure sewer main and grinder simplex and duplex packaged pump stations and STEP systems, as required by the clients.

  • Wastewater collection system evaluations
  • Sewershed and basin studies
  • Gravity sewer design including large diameter interceptors
  • Wastewater conveyance systems – pump stations and force mains
  • Low-Pressure System Designs – Grinder and Septic Tank Effluent Pump (STEP) systems and Low-Pressure Sewer Mains
  • Air Release Valving Distribution and Sizing
  • Water Hammer/Transient Surge Analysis and Control
  • Gravity and Pressure Sewer System Hydraulic Modeling
  • Trenchless Crossings for Railroads, Highways and Wetlands/Surface Waters
  • Trenchless rehabiliation including CIPP, Slip-lining, centrifugally cast coatings, and pipe bursting.
  • Fine Screening and Grit Removal

Specialties

Reuse

Both public and private sector clients are finding a need for reuse systems now more than ever as they strive to reduce potable water consumption, maintain wastewater direct discharge permits with nutrient loading limits, and establish goals for implementing beneficial reuse and green systems.
Our project team has been designing reuse storage, distribution, and dispersal systems for over a decade. We have prepared reuse master plans and designs of reuse elevated storage and distribution systems for multiple clients in North Carolina. These projects have included hydraulic modeling, alternative analysis, cost analysis, and development of schematic designs at the preliminary planning stage. Many of these evaluations have resulted in design of multi-phased reuse system designs. Our engineers have designed reuse mains of various diameter and up to 20-inch diameter with over 20 miles of reuse main in North Carolina.

  • Reuse Master Planning
  • Reuse Distribution System Design
  • Elevated Storage
  • Spray Field Design
  • Booster Pump Station Design
  • Hydraulic Modeling
  • Trenchless Design

Specialties