weight pipe. Plus, the pipe can be installed quickly with minimum crew and without heavy machinery while providing the owner with a lower installed cost versus other types of pipe or structures. There is also the fact that HDPE pipe can be made using a high amount of post- consumer recycled HDPE material, taking single use HDPE bottles, for example, and turning them into pipe that will last for generations” The site civil engineer, Bohler, (Chalfont, PA) considered other ma - terials, such as corrugated metal pipe (CMP) and precast chambers. Even though CMP could handle the deep burial depths that could reach 22 feet, the Advanced Drainage Systems, Inc. (ADS) (NYSE: WMS) N-12® HDPE pipe from 36 to 60 inches in diameter with the proper backfill was selected by Bohler primarily for its long service life. Depending on depth, the backfill consisted of Compacted Class I, Flowable Fill Concrete, or reinforced steel concrete encasement. For the riser/inspection ports, 179 twelve-inch ADS Nyloplast® traffic- rated Inline Drain units were installed plus 119 ADS FlexStorm® 2x4 SS Pure FTC (full trash capture) units provided environmental water quality protection. “We wanted to not only meet but exceed updated Pennsylvania Depart - ment of Environmental Protection specifications,” stated Will Jager, EIT, assistant project manager for Bohler. “So, it was important that the system be watertight, and provide the ability to take care of total suspended solids.” This project’s five large retention beds used more than 17 miles of ADS N-12 AASHTO pipe, as well as 862 fittings, gaskets. “During just the past two years there has been a virtual explosion of new warehouse distribution centers being built,” said Daniel Currence, P.E., director of engineering for PPI’s Drainage Division. “The com- mon thread in all these projects is the desire by the building owners and
Protecting Environment Wins Warehouse Project of Year from Plastics Pipe Institute
Miles of HDPE Pipe Used for Underground Stormwater Control System
To protect the environment of this area on the Pennsylvania/Mary - land border, a new warehouse facility with a 1.5 million square foot building elected to use not one but five large underground stormwater storage units. The need for the watertight system that would be under the loading and parking areas was due to karst topography and the cre- ated impervious area of some 83 acres. One of the largest buildings and sites in Franklin County, the project used more than 17 miles of large diameter, corrugated high-density polyethylene (HDPE) pipe to construct the five large underground detention beds, one of which has 24,500 ft (4.64 miles) of 60-inch diameter pipe. It was named Project of the Year by the Drainage Division of the Plastics Pipe Institute, Inc. (PPI), the major North American trade association representing the plastic pipe industry. “The size and scope of the project along with the high visibility of using HDPE pipe and its features and benefits are among the many reasons that this earned the Project of the Year honor,” explained David M. Fink, PPI president. “The project shows how the use of HDPE pipe can protect the environment, lower greenhouse gas emissions by reducing the number of truck loads as a result of nesting the light
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csengineermag.com
October 2022
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