Atkins North America, Inc. has designed a rugged 5,600 ft. stormwater management system using Reinforced Concrete Pipe (RCP) and Elliptical Reinforced Concrete Pipe (ERCP) from Rinker Materials capable of handling future major floods.
When the drainage system built in the 1950s and 1960s failed to protect homes and businesses on Reno’s west side from storm flooding in 2014, the city took action.
Following a comprehensive engineering analysis to confirm existing drainage deficiencies, Atkins North America, Inc. designed a robust 5,600 foot system. stormwater management system using Reinforced Concrete Pipe (RCP) and Elliptical Reinforced Concrete Pipe (ERCP) from Rinker Materials capable of handling future major floods. Installed by Q&D Construction within existing infrastructure along Fourth Street and Stoker Avenue, the $5.4 million project was completed on budget and ahead of schedule in August 2019.
Recalling the 2014 storm that triggered one of Reno’s biggest infrastructure projects in the past decade, John Flansberg, Director of Reno Public Works, said, “It (the storm) made the intersection unavailable for traffic, and obviously it’s an important corridor for traffic. It brought a lot of sediment and actually flooded a local hotel.”
Q&D Construction project manager Daniel March added: “Water was invading people’s walkways, invading courtyards. It is as if there is no drainage system here. It was just a smaller system.”
In addition to the RCP and ERCP ranging from 36” to 48”, the new stormwater management system includes catch basins and an outlet into the Truckee River. Designed to quickly and efficiently capture and move large volumes of stormwater, the system helps minimize potential flood damage from the intersection of Seventh Street and Rey Street and terminates at the Truckee River at Dickerson Road and Chism Street.
The maximum design throughput capacity for the project was approximately 113 cfs for the five-year-old storm with a maximum RCP capacity of 219 cfs. Installing the new stormwater management system into the existing infrastructure saved time and money, while limiting disruption to businesses and residents.
As an added benefit, stormwater runoff from Interstate 80 that will be routed through the new stormwater management system has facilitated a cost-sharing agreement on the project with the Nevada Department of Transportation (NDOT).
Construction of the project began in February 2019 and involved seamless collaboration between numerous public and private agencies, including the City of Reno, AT&T, Carson-Truckee Water Conservation District, Charter Spectrum, Kinder Morgan, NDOT, Nevada Division of Environmental Protection, Nevada Division of State Lands, NV Energy, Orr Ditch Water Company, Truckee Meadows Water Authority, US Army Corps of Engineers and Union Pacific Railroad.
According to the City of Reno, “The new improvements will increase the capacity of the entire drainage system and provide a direct benefit to watershed businesses and residents, as well as water quality benefits for the Truckee River. “.