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- Water Street Pump Station Flood Barrier Wall
Water Street Pump Station Flood Barrier Wall
The Water Street Pump Station was originally constructed in 1964 and served as the headworks and operations for the Wastewater Treatment Plant. In 2000, when the new Wastewater Treatment Plant was constructed on Camelot Drive, the building on Water Street was converted into a pump station. Today, the Water Street Pump Station receives most of the Town's influent wastewater flows, averaging 1.5 million gallons per day, through a 30-inch diameter reinforced concrete pipe and pumps wastewater to the Treatment Plant on Camelot Drive through a 4.5-mile force main.
During major coastal events, the Water Street Pump Station experiences flooding. The Town retained Environmental Partners to design and oversee construction of a 5-foot high flood barrier wall to preserve the function of this critical infrastructure during storm surges and high sea levels. The wall will be constructed with a reinforced concrete foundation and reinforced concrete wall with stone veneer.
Construction began in the Fall of 2022 and is anticipated to be completed in the Summer of 2023.
Construction Updates
Construction activities for this week consisted of the following:
- Manafort backfilled and prepped the area near the garage for paving.
- Manafort paved the ramp way to the waste oil tank.
- Manafort adjusted area drains in the front and back to grade.
- Manafort reinstalled the area drain box near the garage.
- Manafort removed silt socks and construction fence around the site.
- Continued grinding, scraping, and cleaning of the inside face of the flood wall.
- Final paving was completed.
Manafort will resume work on site next week and the following activities are anticipated to occur:
- Installation of loop detectors at motorized sliding gates on both wall entrances
- Installation of 5-foot tall chain link fence around existing garage and waste oil tank
- Loam and seed disturbed areas
- Remove the Engineer's trailer
- Finish grouting around the stone veneer
Construction activities for this week consisted of the following:
Manafort continued backfilling and compacting around the wall foundation.
- Placed concrete pad extension for the waste oil tank and re-installed the waste oil tank.
- Placed concrete for duct banks damaged or broken up to install conduits during construction.
- Continued grinding, scraping, and cleaning of the inside face of the flood wall.
- Backfilled and grading around duct banks repaired.
- Installed safety railings and caution tape around all trenches not backfilled to grade.
- Manafort cleaned, swept, and demobilized their crew on Wednesday February 15, 2023, until the spring when the weather allows for veneer work.
- Norway Electrical pulled wires through conduits and installed power conduits for site lighting on the northern side of the Pump Station.
Manafort plans to return to the site in the Spring when weather allows for veneer work to be completed. Their fence subcontractor will be on-site in approximately 4 to 5 weeks to perform the following work:
- Install motorized sliding gates on both wall entrances including, gates, motors, keypads, and loop detectors.
- Install 5-foot-tall chain link fence around the existing garage and waste oil tank.
Construction activities for this week consisted of the following:
Manafort rerouted the 1-inch pipe feeding the Dissolved Oxygen Analyzer and re-installed the salvaged concrete pad and Dissolved Oxygen Analyzer.
- Manafort re-installed the salvaged concrete bases and light poles on the southern and northern sides of the Pump Station.
- Comm-Tract Corporation reinstated the fiber optic cable underground through the previously installed conduits.
- Manafort prepped the area in front of the sidewalk for the flag pole base to be poured.
- Continued grinding, scraping, and cleaning of the inside face of the flood wall.
- Rotated, flushed, and activated the new fire hydrant in the Northwest corner of the flood wall.
- Built sidewalk forms for the flagpole and areas the sidewalk was damaged due to drainage work.
- Pumped out the waste oil tank, removed it from the existing concrete pad, and built forms to raise the concrete pad 1-foot.
- Placed concrete for sidewalks and flag pole base.
- Crew continues to dewater across the site to lower the groundwater table and perform work in the dry.
Manafort will resume work on-site next week (February 13, 2023) and will perform the following activities:
- Complete backfilling around wall foundation.
- Re-install flag pole in new concrete base.
- Continue grinding, scraping, and cleaning of the concrete flood wall.
- Re-instate power to the Dissolved Oxygen Analyzer
- Re-install waste oil tank and grade around the raised concrete pad.
Construction activities for this week consisted of the following:
Manafort exposed and prepped conduits inside duct banks in anticipation of underground electrical work.
- The Plymouth Fire Department pulled new fire alarm communications wire through the previously prepped conduit from the pump station to the telephone pole on Water Street and tested the fire alarm system.
- Manafort installed new conduits for both light poles being reinstalled.
- Norway Electric installed conduits for motorized sliding gate.
- Manafort installed the area drain by the Water Street entrance.
- Manafort prepared rebar and forms for the concrete flag pole base.
- Continued grinding, scraping, and cleaning of the inside face of the flood wall.
- Continued backfilling around the outside of the wall.
- Gone Green was on site to install the pull wire through the previously installed conduit for the fiber optic cable.
- Crew continues to dewater across the site to lower the groundwater table and perform work in the dry.
Manafort will resume work on-site next week (February 6, 2023) and will perform the following activities:
- Complete backfilling around wall foundation.
- Re-establish fiber optic connection underground through conduits previously installed.
- Continue grinding, scraping, and cleaning of the concrete flood wall.
- Re-install the Dissolved Oxygen Analyzer.
- Re-install light pole bases and light poles.
- Place concrete for duct banks and flag pole base.
Construction activities for this week consisted of the following:
Manafort has completed the concrete work for the flood barrier wall, with the final two wall sections poured this week.
- Manafort has been on-site all week installing wall forms.
- Continued grinding, scraping, and cleaning of the inside face of the flood wall.
- Gone Green was on site to install the pull wire through the previously installed conduit for the fiberoptic cable.
- Crew continues to dewater across the site to lower the groundwater table and perform work in the dry.
Manafort will resume work on-site next week (January 30, 2023), and will perform the following activities:
- Complete backfilling around wall foundation.
- Install the area drain and complete the remaining underdrain along the western side of the wall.
- Re-establish fiber optic connection underground through conduits previously installed.
- Continue grinding, scraping, and cleaning of the concrete flood wall.
- Re-install the Dissolved Oxygen Analyzer.
- Re-install light pole bases and light poles.
- Begin electrical conduit work from the light poles to the existing electric manhole.
Construction activities for this week consisted of the following:
The concrete work for the flood wall along the site is approximately 90% complete, with three wall sections poured this week.
- Manafort has been on site all week installing forms.
- Continued grinding, scraping, and cleaning of the inside face of the flood wall.
- Gone Gree was on site to complete the conduit work for electrical and fiber optic cables.
- Crew continues to dewater across the site to lower the groundwater table and perform work in the dry.
Manafort will resume work on-site next week (January 23, 2023), and will perform the following activities:
- Complete the concrete work for the flood wall.
- Install the area drain and complete the remaining underdrain along the eastern side of the wall, including backfill.
- Re-establish fiber optic connection underground through conduits previously installed.
- Continue grinding, scraping, and cleaning of the concrete flood wall.
- Continue installing shelf and wall forms along the wall alignment.
- Placement of concrete in the prepared wall sections.
Construction activities for this week consisted of the following:
Manafort has completed approximately 90% of the backfilling and compaction for the wall foundation.
- The concrete work for the flood wall along the site is approximately 80% complete. Manafort continues to install the rebar reinforcement in the concrete wall including water stops and construction joints.
- Set catch basin rim by the southeast corner of the wall and set catch basin rims for the two catch basins along the western side of the wall in front of the pump station.
- Began grinding, scraping, and cleaning of the inside face of the flood wall.
- Gone Green installed underground conduits for the fiber optic cable to be re-established.
- Crew continues to dewater across the site to lower the groundwater table and perform work in the dry.
Manafort will resume work on-site next week (January 17, 2023), and will perform the following activities:
- No construction activities on Monday, January 16 in observance of Martin Luther King Jr. Day
- Complete concrete work for the flood wall
- Install the area drain and complete the final 20% of underdrain along the eastern side of the wall, including backfill
- Re-establish fiber optic connection underground through conduits previously installed
- Re-install the dissolved oxygen analyzer onsite
- Continue grinding, scraping, and cleaning of the concrete flood wall
- Backfill and rough grading across the site
- Placement of concrete in the prepared wall sections
Construction activities for this week consisted of the following:
Manafort completed all excavation along the wall alignment. The foundation is expected to be 100% poured in place and partially backfilled by the end of the week.
- Concrete work for the flood wall along the site is approximately 60% complete. Manafort continues to install the rebar reinforcement in the concrete wall including water stops and construction joints.
- Manafort installed 80% of the underdrain on the eastern side of the wall along the foundation.
- Crew continues to dewater across the site to lower the groundwater table and perform work in the dry.
Manafort will resume work on-site next week (January 9, 2023), and will perform the following activities:
- Continue backfilling against wall foundation
- Continue installation of wall reinforcement and wall joints including wall penetrations for electrical and fiber optic conduits across the site
- Install forms, wall reinforcement, and placement of concrete for the columns on the eastern entrance to the Pump Station
- Install the area drain and complete the final 20% of underdrain along the eastern side of the wall, including backfill
- Backfill and rough grade across the site
- Placement of concrete in the prepared wall sections