M. Brent Johnson

M. Brent Johnson has extensive expertise in pipeline condition assessment and rehabilitation, collection system planning, infiltration/inflow studies, and trenchless technologies. Mr. Johnson’s focus has been on the rehabilitation of existing water distribution and wastewater collection systems with a special emphasis on the use of trenchless technologies to reduce costs, minimize impacts to the public and environment, and to shorten construction times. Mr. Johnson has provided cost‐effective water and sewer rehabilitation recommendations and designs throughout the Southeast.

Senior Technical Manager, Sewer Force Main Condition Assessment and Rehabilitation, Chattanooga, Tennessee Mr. Johnson served as technical lead for the condition assessment and rehabilitation of 26,000 linear feet of 30‐inch ductile iron pipe. The project consisted of ultrasonic and BEM testing as well as rehabilitation design and construction administration services.

Technical Director, Sanitary Sewer Evaluation Survey (SSES) and Design Project Engineering Design and Construction Services, Palm Beach County, Florida. Mr. Johnson serves as the technical director for the Palm Beach County's ongoing SSES and sewer design engineering services for 1,250 miles of gravity sewer pipe ranging in size from 4 to 30 inches in diameter, as well as 650 miles of force main ranging in size from 1.25 to 66 inches. CDM Smith was retained to complete a SSES which includes CCTV inspections, manhole (MH) inspections, and lateral inspections in identified portions of the service area in accordance with National Association of Sewer Service Companies (NASSCO) standards, and sewer system rehabilitation design packages. Mr. Johnson’s responsibilities include review of technical specifications and design drawings for compliance with best management practices, review of rehabilitation and replacement methodologies, and review of project constructability.

Senior Technical Manager, Gravity Sewer Condition Assessment and Rehabilitation, Slidell, Louisiana Mr. Johnson served as technical lead for the condition assessment and rehabilitation of the Dellwood and Bayou Bonfouca basins. Project consisted of over 500‐point repairs and rehabilitation/replacement of over 26,000 linear feet of gravity sewer pipe.

Senior Technical Manager, Gravity Sewer Rehabilitation, Greensboro, North Carolina. Mr. Johnson served as technical lead for the Gravity Sewer Evaluation Project that included rehabilitation design for 15,000 linear feet of 6‐inch to 18‐inch sewer mains and 50 manholes. The project includes rehabilitation design for CIPP, slip lining, and open cut replacement.

Senior Technical Manager, Gravity Sewer and Force Main Condition Assessment and Rehabilitation, Palm Beach County, Florida. Mr. Johnson served as technical lead for the condition assessment and rehabilitation of 300,000 linear feet of 4‐inch through 30‐inch gravity sewer and force mains ranging from 2‐inch to 66‐inch. The project consisted of desktop asset prioritization, CCTV, smoke/dye testing, and manhole inspections as well as rehabilitation design and construction administration services.

Senior Technical Manager, Neuse Parallel 72‐inch Interceptor Condition Assessment and Rehabilitation, City of Raleigh, North Carolina. Mr. Johnson served as technical lead for the condition assessment and rehabilitation of 45,000 linear feet of 72‐inch RCP gravity sewer interceptors. Phase one of the project consisted of manned‐entry pipeline and manhole inspection and bypassing of sewer flow from various gravity sidelines and three pump stations. Phase two consisted of the design and construction administration of rehabilitation techniques including CIPP, epoxy lining, and open cut replacement.

Senior Technical Manager, Sewer Main Rehabilitation, City of Columbia, South Carolina. Mr. Johnson served as technical lead for the condition assessment of 510,000 linear feet of 15‐inch through 60‐inch gravity sewer mains. Project included multi sensor investigation techniques including CCTV, Laser Imaging, Sonar Profiling, Hydrogen Sulfide Measurement, and Water Temperature Measurement.

Senior Technical Manager, State Street Water and Sewer Main Rehabilitation, City of Raleigh, North Carolina. Mr. Johnson served as technical lead for the condition assessment of 21,000 linear feet of 24, 30, and 36‐inch PCCP potable water mains along Hillsborough Street and the downtown area and 36,000 linear feet of 54‐inch PCCP and DIP raw water mains serving the EM Johnson WTP. Project also included condition assessment of 140,000 linear feet of 8‐inch and 12‐inch gravity sewer mains in the State St basin near downtown Raleigh.

Senior Technical Manager, Gravity Sewer Rehabilitation, Carrboro‐Chapel Hill, North Carolina. Mr. Johnson served as technical lead for the Gravity Sewer Evaluation Project for the Orange Water and Sewer Authority (OWASA). The project included rehabilitation design for 124,000 linear feet of 8‐inch to 24‐inch sewer mains and 275 manholes in 74 project locations around the OWASA service area. The project includes multiple aerial crossings and pipe sections that are located underneath buildings.

Senior Technical Manager, Sewer Force Main Rehabilitation, City of Brevard, North Carolina. Mr. Johnson served as technical lead for the Neely Road Force Main condition assessment that included ultrasonic testing and laboratory corrosion analysis of 12,000 linear feet of 14‐inch DIP force main under Old Hwy 64.

Senior Technical Manager, Grassy Branch and Twelve Mile Creek Manhole Rehabilitation Project, Union County, North Carolina. Mr. Johnson served as technical lead for the Find‐it‐Fix‐it condition assessment of sanitary sewer manhole structures for Union County Public Works (UCPW). The project included manhole inspection, rehabilitation and accessibility design, and construction services for 530 manholes in environmentally sensitive areas.