NEWWA Spring Learnapalooza: Technical Sessions
TUESDAY MORNING, MARCH 30 TECHNICAL SESSION 1 — DISTRIBUTION I 9:00 AM – 11:30 AM
9:45 AM – “Construction of a 125,000-gallon Glass-Fused-to-Steel Water Storage Tank in Keene, NH” JENNIFER REYNOLDS, Staff Engineer 2, Tighe & Bond, Westfield, MA, and AARON COSTA, Operations Manager, City of Keene DPW, Keene, NH
The city of Keene, NH, replaced a 125,000-gallon partially buried water storage tank to address concerns related to pressure, age, and the style of construction. Construction of a new glass-fused-to-steel tank was completed in the fall of 2020. The presentation will review the design and construction considerations for the new tank, including increasing the operational elevation of the tank to improve pressure in the service area, and the installation of a new aeration and mixing system to improve water quality.
TUESDAY MORNING, MARCH 30 TECHNICAL SESSION 3 — WATER TREATMENT I 9:00 AM – 11:30 AM
10:30 AM – “Biofilter Troubleshooting at the Poughkeepsies’ Joint Water Treatment Plant” ERIN MOORE, P.E., Senior Project Manager, Tighe & Bond, Rhinebeck, NY
The filters at the Poughkeepsies’ Joint Water Treatment Facility (PJWTF) have experienced lower unit filter run volumes since 2017 when they became biologically active. This presentation will describe the steps taken to identify the cause of the filter capacity limitations and will discuss the history of the PJWTF which has consistently been an early adopter of treatment technologies, the plant’s experience with ozone and biofiltration upgrades, and describe the troubleshooting evaluation which resulted in a significant increase of plant capacity.
TUESDAY AFTERNOON, MARCH 30 TECHNICAL SESSION 5 — DISTRIBUTION II 1:00 PM – 3:30 PM
1:15 PM – “Approaches to Address Resiliency and Reduce Risk at Pump Stations” AMY SOWITCKY, P.E., Project Manager, Tighe & Bond, Middletown, CT, and DANIEL ROOP, P.E., Project Engineer Tighe & Bond, Westwood, MA
Climate, along with regulation changes require municipalities to plan for higher flood levels than any time in history. As we help municipalities protect their infrastructure by upgrading facilities, we have utilized different approaches to address the structure’s concerns. We will review two case studies of pump station design approaches. The first approach is replacing the station, the second approach is to increase the strength of the existing structures. These studies will help provide insight for structure designs in similar situations.
WEDNESDAY MORNING, MARCH 31 TECHNICAL SESSION 8 — DAMS 9:00 AM – 11:30 AM
10:30 AM – “The Dam Removal Decision” DANIEL BUTTRICK, P.E., Senior Engineer, Tighe & Bond, Westfield, MA
Many unneeded drinking water reservoirs remain as relics on the landscape and maintaining the dams that impound these reservoirs impose costs on the dam owner and the ecosystem alike. However, dam removal is perceived as a difficult process littered with obstacles, dissuading owners from proceeding. We will discuss concerns to be reviewed when planning a dam removal, how obstacles can be overcome, and how removal can still be in the dam owner’s interest despite challenges faced.