PRODUCTS USED
- 20' (6 m) of 15” (375 mm) HP Storm Dual Wall Pipe
- 420 (128 m) of 18" (450 mm) HP Storm Dual Wall Pipe
- 1,320' (402 m) of 24" (600 mm) HP Storm Dual Wall Pipe
- 1,460' (445 m) of 30" (750 mm) HP Storm Dual Wall Pipe
- 1,000 (305 m) of 36" (900 mm) HP Storm Dual Wall Pipe
- 460' (140 m) of 42" (1,050 mm) HP Storm Dual Wall Pipe
- 660' (201 m) of 48" (1,200 mm) HP Storm Dual Wall Pipe
- 166 StormTech MC-7200 Chambers
- 35 Nyloplast Drain Basins
- ADS Plus Geosynthetic
In the early 2020s, a private company proposed a 12,500-capacity amphitheater and worked with the city to develop the Sunset Amphitheater. The amphitheater would bring an entertainment element that Broken Arrow has not had previously. Infrastructure was needed for the theater and for future park events. Broken Arrow was looking for a stormwater management solution to maximize green space for the park’s recreational activities. With the help of Kimley-Horn, and a cost analysis on StormTech that showed a quick return on investment, the city decided to go with a StormTech underground detention system.
Kimley-Horn knew that StormTech MC-7200 Stormwater Chambers would be the ideal detention system, while HP Storm pipe could convey stormwater to the chambers. Existing Nyloplast basins in the park were used to capture the stormwater. The engineering firm had previously utilized ADS products and knew the cost effectiveness, versatility, ease of installation and maintenance would save the city money.
This is the first time Broken Arrow has publicly used a StormTech system on an infrastructure project. The system holds water until it is conveyed to a nearby creek. To protect the area’s waterways, a StormTech Isolator® Row was installed to capture stormwater “first flush” runoff. This method reduces the volume of water in the creek, so it does not flood in large rain events. The project was developed rapidly, and the design stage was only three months long. Since the system would tie into existing basins and conveyance, Kimley-Horn was able to modify the designs easily with ADS fittings, such as bends and reducers.
StormTech chambers are designed to save valuable land, reduce flooding risks and protect water resources. The chambers provide a durable structural system and are designed in accordance with AASHTO LRFD Bridge Design specification for the HS-20 Live loads. StormTech chambers are available in a variety of sizes to meet any project need and are injection molded for uniform wall thickness.
HP Storm polypropylene pipe provides superior pipe stiffness, longer bells and spigots and a premium joint performance for a longer service life. The smooth interior wall offers additional strength and high flow capacity. HP Storm pipe meets or exceeds the standards specified in ASTM F2881 and AASHTO M330 and the extended bell and spigot meets ASTM D3212. Polypropylene is resistant to the effects of chemicals, abrasion, hot soils and effluent.
Nyloplast drain basins and curb inlets were custom built for the project as they are for each application. Nyloplast products are more durable and corrosion resistant than precast basins and combine a rugged PVC structure with ductile iron grates. The basins can be easily adjusted in the field to meet the final grade. The structures are shipped with rubber gaskets to ensure a watertight connection
