Mr. Hoff served as project manager and technical advisor for Phase A of the CSO 012 Sewer Separation project for MSDGC. The intent of the project is to reduce combined sewer overflows (CSO) through a combination of sewer separation, in-line and side-line storage, and volume reductions through green and grey infrastructure. The scope of the project involved evaluation of feasible alternatives, developing the detailed design of a conveyance and storage system that may be undertaken incrementally in multiple phases. At the completion of Phase A, the project will consist of approximately 3,200 linear feet of 12’x12’, 12’x10’, 10’x10’ & 10’x8′ box conduit, including a 7.50 Ac-ft detention basin and construction of over 2000 linear feet of surface drainage and sanitary sewers. The system will detain approximately 4.5 million gallons during a 100-yr storm and provide the backbone for a 174 MG typical year CSO reduction at project build out. Significant challenges included the design coordination for the placement of 800 LF of 12’x10’ box installed via open cut under I-75, as well as another 1,100 LF at depths in excess of 35’ through a historical residential area.