[ Written by Thomas W. Young, P.E., Reno Location Principal ]
Phase II of the North Virginia Street Interceptor Sewer project required 1,900 lineal feet of interceptor to be replaced, a lift station to be built and 4,500 feet of force main to be constructed. In addition, the project combined coordination with entities as deep as the construction was wide. Lumos & Associates worked with Farr West Engineering and Q&D Construction to coordinate efforts with the City of Reno, NDOT, NDEP, Truckee Meadows Water Authority, NV Energy and the University of Nevada.
Lumos Brings Together Design, Construction, Feasibility, and Government Teams to Complete Another Phase of the North Virginia Street Interceptor
Utilizing our past performance, Lumos submitted for the City’s on call list in December 2012, where we were ranked first in the sewer design category.
The North Virginia Street Interceptor Phase II project continues the City of Reno’s efforts to replace an undersized interceptor main, which currently serves the Stead, Golden Valley, Lemon Valley, and other north Reno areas. Phase I replaced 7,700 lineal feet of the 39,500 foot long interceptor. Phase II replaced 1,900 lineal feet of interceptor, constructed a lift station, and constructed 4,500 feet of force main.
As the build-out of the North Valley, North Reno, and the University of Nevada areas continues, the North Virginia Interceptor was quickly reaching capacity. Replacing 39,500 lineal feet of undersized pipe, which is the entire interceptor length, was cost prohibitive. By a combination of upsizing portions of the existing North Virginia interceptor and diverting sewage to the parallel, underutilized Spokane Street and Second Street Interceptor; growth could be accommodated with significantly less expense.
Tying into Phase I, the project consisted of replacing the 24-inch interceptor with 1,100 lineal feet of 36-inch PVC pipe, terminating at a custom splitter structure where flows are split. Fifty percent of the flows continue by gravity down the existing North Virginia Interceptor, which has significantly greater capacity due to the diverted flows. The remaining fifty percent is diverted approximately 350 lineal feet, to a new five million gallon per day lift station.
Lumos subcontracted with Farr West Engineering to design the new lift station consisting of two alternating variable frequency 3,500 gallon per minute (GPM) submersible pumps. Redundancy is not only provided by the second 100 percent capacity submersible pump, but through two additional diesel driven 1,300 GPM and 2,200 GPM capacity pumps, essentially providing indefinite backup redundancy. The control system for the electrical and diesel pumps are independent in case of system failure. Electrical supply for the diesel pumps and control system are supplied through solar recharged batteries, therefore eliminating the need for a permanent on-site backup generator.
The lift station discharges through 4,500 lineal feet of 21-inch seamless High-Density Polyethylene (HDPE) force main; passing through a combination of City of Reno roadways, Nevada Department of Transportation’s right-of-way, two Union Pacific Railroad corridors, and University of Nevada property.
Dustin Waters, P.E., Associate Civil Engineer stated “Lumos & Associates has recently demonstrated an exceptional ability to successfully coordinate a complex project amongst multiple stakeholders, during both the design and construction phases. Their responsiveness, and skilled engineering and construction management capabilities led to a high quality addition to the City’s sewer infrastructure.”
Tony Angelopoulos, Permit Inspection Supervisor with NDOT expressed, “I wanted to thank Q&D Construction, Lumos & Associates and the City of Reno for their coordinated efforts and the high quality workmanship on Wells Avenue. The project turned out great and the accelerated schedule and construction practices provided for minimal impact to the businesses and traveling public.”
Key Personnel: Tom Young, Principal-in-Charge and Project Manager; Tom Guinn, Assistant Project Manager; Bob Schricker, Construction Manager; Ralph Hogoboom, Project Engineer; Richard Guevarra, Project Designer; Mike Everts, Senior Inspector; Max Glenn, Inspector; Farr West Engineering, Lift Station Design.
Client Contact: Dustin Waters, P.E., Associate Civil Engineer, City of Reno, 775.321.8352