SWS Published CSO articleSpokane, Washington is completing a network of buried concrete combined sewer overflow (CSO) structures to store excess water during heavy rainstorms and rapid snowmelt, until the storm surge subsides and the water can be sent to the Riverside Park Water Reclamation Facility for treatment. The structures are included in Spokane’s Cleaner River Faster initiative that reduces the amount of untreated sewage from combined sanitary and storm sewers that discharge into the Spokane River. The 380,000 gallon 60-inch pipe CSO Basin 41 Control Facility was constructed using 60-inch and 72-inch diameter Class IV reinforced concrete pipe (RCP) in 12-foot lay lengths. In addition, the system accommodates 120-inch diameter precast concrete manholes in the storage structure.

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09Nov 2015

This is a demonstration of the comparative flammability of polypropylene pipe (PP), reinforced concrete pipe (RCP), and high density polyethylene pipe (HDPE). Dry hay is ignited in three 18 in. by 18 in. pipes and allowed to burn. This is an unedited test conducted on October 21, 2015.