A new distribution center complex was built in Rialto, California, to meet the growing demands of online shoppers. The site is over 120 acres and includes two buildings, each with over 1 million square feet of building space. The site also includes parking for 1,000 vehicles, over 900 off-dock trailer stalls, and 100% site concrete paving. A total of 11,100 LF of 162” diameter, perforated CMP detention was used, providing 1,588,038 CF of storage in the pipe. An additional 1,368,742 CF of storage is provided from the stone backfill. The system was made with 26 runs, ranging from 75’ to 698’ connected via a 60” manifold.