Wheaton, IL - The Walker Calloway Trunk Sewer Assessment project for the Trinity River Authority (TRA) of Texas began this past July. RJN Group, Inc. (RJN) is providing professional engineering services for the assessment of approximately 15,000 linear feet of sewer pipe ranging in size from 24” to 42” in diameter.

Assessment services being provided include manhole inspections and internal pipeline inspection using CCTV, Sonar, Laser, and/or all three of those methods together using a combo unit. Deterioration problems have occurred in some of the concrete pipe, the laser technology will be used to determine the remaining thickness of the wall. Ultimately this will determine the remaining useful life of the pipe. The sewer interceptor is located in North Richland Hills, Hurst, and Fort Worth, Texas and transports flows from the City of North Richland Hills and the City of Hurst.

RJN provides civil engineering consulting services for clients and their facilities. The firm's offerings include the inspection, study, design, and construction management of wastewater, water, and stormwater infrastructure. GIS and asset management services are also offered by the firm. RJN is an employee owned design firm, established in 1975, headquartered in Wheaton, Illinois, with offices nationwide. www.rjn.com