Massachusetts Water Resources Authority
PROJECT UPDATE
Date:
Updated November 7, 2022
Contact:
MWRA Public Affairs
Update for Nut Island Headworks Odor Control and HVAC Improvements Project (Contract 7548)
 Exterior view of Odor Control roof and site About this Project: The Nut Island Headworks Odor Control and HVAC Systems Improvements project involves an extensive rehabilitation of the facility that will ensure that Nut Island continues to work as designed. Odor Control facility access, fuel tank replacement and other appurtenances will be rehabilitated. This project will take approximately 36 months to complete.In January 2020, this $187,410.85 contract was awarded to Walsh Construction.. Public Access Plan Public Access paths will remain open during construction. Please obey all posted signage on site.
Exterior sluice gate area MWRA Contact: If you have any questions please contact MWRA Public Affairs. To receive electronic project updates, please register your email address with the MWRA Alerts Service, provided through Everbridge. UpdatesNovember 7, 2022 Sign up for electronic project notifications and updates through our Everbridge service.  CAD Demo  CAD area topping slab demolition to build new foundation  CAD foundations  CAD vessels 9 & 10  FRP Duct replacement August 9, 2022 Sign up for electronic project notifications and updates through our Everbridge service.  Masonry work has begun on Stair 12 super structure  The wet scrubber testing (pH & ORP probes)  Supply air duct in Odor Control Room  Odor Control roof with temporary removable panels over carbon adsorbers  Hot water piping in screen room in AHU-5 & 6 June 29, 2022 Sign up for electronic project notifications and updates through our Everbridge service.   Constructing stair 12 Masonry and tie into existing bench structure April 28, 2022 Sign up for electronic project notifications and updates through our Everbridge service.  Odor Control Stainless FRP Duct  Odor Control FRP Duct Installation  Wet Scrubber Rehab and Chemical Pumps  Odor Control Fan #2 (fan and damper controls)  AHU-3 & 4 rigging (Truck Bay hatch hoist) March 31, 2022 Sign up for electronic project notifications and updates through our Everbridge service.  Odor Control Stainless Steel Duct Installation  Odor Control FRP Duct Installation Wet Scrubber Rehab (Chevron Mist Eliminators, spray nozzles and media)  Odor Control Fan #2  Stair 12 at ground level. Masons will begin building a stair tower.  Air Handler Replacement (AHU- 1 & 2) will serve pump and blower room March 3, 2022 Sign up for electronic project notifications and updates through our Everbridge service.  Odor Control Duct Installation at Wet Scrubbers  Chemical Feed System  Air Handler Replacement (Pump & Blower Room) February 3, 2022 Sign up for electronic project notifications and updates through our Everbridge service.  Odor control fan #1 and 2 pads  Wet scrubber & 90-inch Duct Demo  Elevated walkway platform (access to dampers and controls)  8-inch Sanitary Ejector Piping January 5, 2022 Sign up for electronic project notifications and updates through our Everbridge service.  New fuel oil tanks in service  Temporary heating coil  Odor control fans  Odor Control Fan Headers (new fan on left, old fan on right)
 Caustic storage tanks and pumps November 3, 2021 Sign up for electronic project notifications and updates through our Everbridge service.  Utility relocation at Stair 12 (Building code requires new egress path)  HVAC duct replacement in Grit Area  Underground fuel oil tank piping and wiring  Breeching for new boilers September 28, 2021 Sign up for electronic project notifications and updates through our Everbridge service.  Setting one of the 20,000 Fuel Oil Storage Tanks  20,000 Gallon Underground Fuel Oil Storage Tanks in place  Odor control duct being rigged into the odor control room  Wet Scrubber #3 Inlet Duct fitup  Carbon absorber #1 demolition September 7, 2021 Sign up for electronic project notifications and updates through our Everbridge service.  Temporary OC Duct (preliminary testing to test flow for changes)  Temporary Supply Air Fans  Emergency slide gate 3  Excavation for new underground storage tanks August 6, 2021 Sign up for electronic project notifications and updates through our Everbridge service.  OC #4  Portable CAD Unit (ductwork outside)  Caustic Feed System  Boiler Replacement April 27, 2021 Sign up for electronic project notifications and updates through our Everbridge service.  Fan 4 intake (suction) prior to installation of additional Odor Control Duct  Spare fan wheel  Exhaust from fan 4 as it enters the header  Odor control room (future hypochlorite location)  Sub-contractor prep work to get fan up and running  New stainless steel ducts in grit level  Stop log guide rail March 31, 2021 Sign up for electronic project notifications and updates through our Everbridge service.  Odor Control Fan #4 set in place & grouting base frame  New Odor Control SCADA cabinet set in pump and blower room  New caustic tanks set in place  Chemical fill piping for sodium hypochlorite and sodium hydroxide  Temporary carbon absorber unit  HVAC duct work in screen room  Work at spillway, finishing grouting rails and planning stop logs March 2, 2021 Sign up for electronic project notifications and updates through our Everbridge service.  Stop log frames being ins stalled in the emergency spillway  Stop log frames being ins stalled in the emergency spillway  90-inch odor control fan header installed  Forms for new odor control dan foundation  Caustic storage tanks delivered and stored on site February 3, 2021 Sign up for electronic project notifications and updates through our Everbridge service.  Temporary Ductwork at grit level  Temporary duct system to provide ventilation while existing ductwork gets replaced  Temporary fans to provide ventilation while air handlers get replaced  Outdoor roof and removable covers and ductwork being delivered to site  New 90-inch Odor Control Header being rigged into place  New odor control fans being shop tested to confirm operation December 14, 2020 Sign up for electronic project notifications and updates through our Everbridge service.  90-inch duct and dampers removed from odor control room  Sawcutting walls in Grit Room for temporary duct work  Temporary ductwork in Grit Room prior to replacing new ductwork  Sluice gates at emergency spillway that will be replaced  Portable operator to close spillway gates if power is lost. October 29, 2020 Sign up for electronic project notifications and updates through our Everbridge service.  Demolition of sodium hypochlorite containment wall  Site of future sodium hydroxide (caustic) storage tanks and pumps  Ductwork from grit area to feed odor control room  Next month's work at emergency spillway stop logs and sluice gates October 2, 2020 Sign up for electronic project notifications and updates through our Everbridge service.  Odor Control Roof with removable covers for equipment access to wet scrubbers and CAD-1  Temporary waterproofing at removable concrete planks on Odor Control Roof  Ductwork and heat exchanger below removable roof planks that will be demolished in Odor Control Room  Demolition of existing wet scrubber recirculation pumps
Electrical conduits installed in the Odor Control Room to power new equipment June 16, 2020 Sign up for electronic project notifications andupdates through our Everbridge service.  Contractor establishing work zone with concrete barriers, fences and screens at the Odor Control Roof  Contractor removing soil from Odor Control Roof  Location of new odor control fan that will replace the fan that was damaged in the 2016 fire April 22, 2020 Project updates will be posted throughout the period of construction. |
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