Engineering Design: Sewer and Drainage Items 1 - 5 of 5 C&S Consultants, Inc. performs Sewerage and Drainage engineering design for municipal clients. Projects have included: wastewater treatment facilities; pumping stations; river intakes; gravity and force main systems; box culverts; canals; and stormwater conveyance systems. Airline Drive Culvert Drainage Pump Station No. 11 Napoleon Avenue Box Culvert Raw Sewerage Channel Raw Sewerage Channel