Pump Station/Storage Opportunities for Urban Freeway Systemsby Jerome J. Zovne, HDR Engineering Inc, Phoenix, United States,
Vance G. Lee, HDR Engineering Inc, Phoenix, United States,
Document Type: Proceeding Paper
Part of: Hydraulic Engineering
This paper introduces the concept of utilizing underground storage to minimize both the initial cost and the long-term maintenance and operation costs of multiple pump stations for a freeway system. A case study was performed for the Arizona Department of Transportation (ADOT) on the Price and Santan freeways, a contiguous 11-mile stretch of depressed freeway requiring five on-site stormwater pump stations. It was found that the optimal configuration would be for each pump station to have identical capacity (200cfs) and identical configuration (four pumps and standby), and varying lengths of underground storage pipe (96-inch diameter). The storage pipes will double as roadway stormwater interceptor sewers and therefore part of the storage cost is allocated to the drainage systems. In addition to the cost savings, the similarity of stations and interchangeability of equipment will be of great benefit to the freeway system maintenance group.
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