Wet Weather Flow Management Facility

Larson Design Group (LDG) provided preliminary and final process design; grant and funding application preparation; site and surveying services; permit acquisition; architectural design; mechanical, electrical, plumbing, and structural engineering; bidding phase support; and construction administration and inspection services for the design and construction of a wet weather flow management facility in Old Lycoming Township, Lycoming County, Pennsylvania.

Due to the inflow and infiltration during severe wet weather events, the Old Lycoming Area Authority’s (OLAA) sewage collection and conveyance system exceeded OLAA’s treatment agreement limit for sewage flows to the Williamsport Sanitary Authority’s (WSA) west wastewater treatment plant. OLAA was being penalized regularly by WSA for these excessive flows. As part of the OLAA’s wet weather sewage flow management plan, developed in response to the WSA Tributary Community Act 537 Special Study, this project included the construction of a new wet weather pump station and concrete storage tank on a portion of the property owned by WSA; modifications to the Flexer Court metering station; renovations to the Gardenview pump station; and upgrades to the supervisory control and data acquisition (SCADA) system.