By: Pacific Corrugated Pipe Company
This project required the production and fabrication of three large retention systems in support of a logistics center that would be constructing four large warehouses totaling over 1.5 million square feet of warehouse space. These systems would require a total of over 230 tons of 16 gage galvanized steel.
Each of these retention systems were impressive by themselves but collectively required a massive amount of pipe production and fabrication. System one and two required over 7,300 lf and 6,900 lf of 36″ pipe, respectively. The third system required almost 3,500 lf of 42″ pipe. As for the fittings and accessories, there were 24- 36″ tees; 4- 24″ tees and 2- 36″ elbows. For the 42″ system, there were 10- 42″ tees; 4- 24″ tees; and 4- 42″ elbows. Finally, it took over 700 dimple bands to join the entire system not to mention all the risers and ladders.
These retention systems were a design challenge due to the groundwater table being only 300 feet away and having existing soil contamination. The design had to include maximum site storage while balancing the inflow/outflow to the city’s mainline and common wet areas. Due to the city invert of the mainline outflow, and limited by cover/finish grade, the systems had to be minimal in diameter. As the system fills, diversion chambers route water to the wetlands and, in the case of an overflow, it would be routed through other weirs and orifices to the city’s mainline and into a large water quality basin.
Finally, the entire system was wrapped with a PVC non-permeable line to prevent any infiltration into the city ground water table. Roughly 248,000 cu. ft. of water could be stored in these systems. Goodman Logistics Center represents a massive project with significant challenges that were all overcome with the use of galvanized steel.