Civil & Stormwater Engineering

R2T, as a subconsultant, has integrated Geographic Information System (GIS) with PC SWMM stormwater management software to develop hydrology and hydraulics analysis for the Northeast and Southside corridor design of the Atlanta BeltLine. The Southside and Northside Trail projects consist of the design of a 14-foot wide concrete multi-use path with 3-foot soft shoulders on each side extending approximately 4 miles. Our tasks included trail concept refinement and preliminary and final design.

During the 2020-2021 reporting period, R2T assisted Clayton County Water Authority (CCWA) with assessing permittee-owned retention and detention facilities for potential retrofitting water quality impacts. R2T was responsible for Project Management, QA/AC Reviews of lab data reports, MS4 Permitting, and BMP assessment reports which included site photolog with the necessary measurements, BMP retrofit recommendations based on MS4 requirements and Georgia Stormwater Management analytical methods, Site maps highlighting site location, site contours, basin delineation, time of concentration lines, soil type and impervious coverage, BMP retrofit narratives, and Level 5 cost estimations for recommended BMP retrofits. 12 Clayton County-owned facilities were assessed.

R2T provided design services for the green infrastructure project—a design approach that uses natural systems to reduce stormwater runoff, improve water quality, enhance pedestrian safety, and beautify the City neighborhoods. More specifically, R2T provided Project Management Services, 30,60,100% Conceptual Design Documents, Bidding and Award Support Services, and Permitting Support Services. R2T also incorporated City of Atlanta DWM feedback through a design charette with neighborhood planning units and other invested stakeholders for the improvement of the stormwater conditions at the West Manor Community.

As the lead firm, R2T provided professional assistance for general engineering consulting services for water quality monitoring of stormwater as part of Dobbins AFR MS4 regulated by the Georgia Environmental Protection Division (EPD). Routine stormwater sampling and reporting assistance were provided to satisfy and meet MS4 permit mandates. R2T conducted smoke testing to confirm connectivity for storm and sewer connections.

The Philadelphia Water Department (PWD) employed “green” stormwater techniques to reduce runoff volume in order to reduce combined sewer overflow (CSO) discharges. R2T was responsible for a multi-stage project design development, AutoCAD drawings preparation, preparation of Class 4 Construction Cost Estimates (CCE), and data entry for the PWD’s Guaranteed Pavement Information System (GPIS). The CCE was performed utilizing conceptual plans from which R2T identified all line items and formed construction costs.