weight and more fluid installation. Installing the plastic chambers can be done with a reduced crew, and the equipment utilization to set the chambers is minimal. You can handle them with just two individuals in most cases. We’ve done multiple projects with them. “We certainly like the high-performance pipe because it eliminates any deflection so you can pass the mandrel test. Money well spent getting the HP Storm pipe. We just use it to eliminate problems on the job site. When we pull mandrels for the City, we want that mandrel system to work every time. We’re going to use that pipe in the vast majority of times.” A high-performance polypropylene (PP) pipe for gravity-flow storm drainage applications, HP Storm pipe provides stiffness and premium joint performance. The ADS design couples advanced polypropylene resin technology with a proven, dual-wall profile design for superior performance and durability, according to the company. The pipe is corrosion resistant and is unaffected by salts, chemicals and hot soils and meets or exceeds ASTM F2881 andAASHTO M330. Burial cover can range from 1-39 feet. “The stadium is built into the hillside and part of it is in the existing floodplain,” explained Drew Hanna, project manager for site developer the Daimler Group, Inc. (Columbus, Ohio). “We remediated about 30,000 yards of peat moss. Dug all that out, put back stable soils plus a little bit of rock to stabilize the plateau, and then put in about 80,000 yard of fill plus the two StormTech systems from ADS. These take all the runoff from the field and parking lots west of the stadium and flows through the filter then back into the watershed and the floodplain. “It was quite a process. We literally built the plateau to the field 20 feet out of the floodplain above existing grade, right up to the hillside. This kept the beauty of the land. When you look over the hillside, you see the floodplain, the river, all the natural trees and foliage. We even found an old abandoned bridge buried in the hillside, which we reme-
Pollution Discharge Elimination System (NPDES) and EPA Phase II Standards. Built in 2008 on the site of the former golf course in northeast Co- lumbus, the campus includes KIPP Elementary, KIPP Primary, KIPP Middle and the KIPP High School along with the KIPP Early Learning Center and the KIPP Athletics and Wellness Complex. Additionally, the YMCA of Central Ohio operates an Early Learning Center at KIPP Primary for infants to pre-kindergarteners. Also, the Battelle Envi- ronmental Center opened on the KIPP Columbus Campus in 2017. This center has learning labs, a makerspace, demonstration areas, and a three-mile nature path and preserve that is incorporated into the educational programming. KIPP is a national network of 242 free, open-enrollment, public charter schools that focus on educating early childhood, elementary, middle, and high school students. The two underground chamber systems provide detention and water quality for the limited asphalt area, the building rooftops, field, and track. From the chambers, water flows into ADS HP Storm pipe, car- ried into the floodplain area and eventually travels to Alum Creek. A weir plate between the chambers and the outlet provides the required release rates. “Utilizing the StormTech chambers provided an efficient footprint to minimize impact to the project.” Nagy stated. “And we needed the water quality. The city of Columbus still regulates and requires post- construction stormwater controls for both water quality and water quantity.” Massana Construction Company, Inc. (Columbus, Ohio) was respon- sible for installing both stormwater control systems. “We prefer to utilize the StormTech systems in most cases,” offered Toby Beegle, operations manager for Massana. “That’s because of Two underground detention systems were constructed using a network of 288 StormTech chambers that can hold a combined total of nearly 450,000 gallons of water. Photo: The Daimler Group, Inc
The Kipp athletic stadium was built on the former driving range of a golf course. Photo: ADS.
csengineermag.com march 2020
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