Hinsdale bridge

Crews continue to install deck panels, forms for drainage scuppers within the deck, and brackets and forms for overhangs as they progress westerly to reach the Vermont abutment. Welding the shear studs to the beams will also advance into Vermont next week. Tensioning of the bolts on the recently erected structural steel will be substantially complete this week. Cleaning and removal of the components of the water treatment system used at Pier 1 is on hold.

No traffic impacts are anticipated on Vermont Route 142 next week, however the work zone remains active and motorists should watch for construction vehicles entering and exiting the work site.

Due to current work on New Hampshire Route 119 associated with the project, vehicles traveling eastbound into New Hampshire from Vermont should expect a newly line-striped lane shift on NH 119 shortly after traveling over the twin bridges. Signs and barrels are in place to assist motorists through the work zone.

Crews will continue to work on finishing the tensioning of the recently erected structural steel next week. The water treatment system used at Pier 1 is scheduled to be cleaned and the components removed from the site beginning on Monday.

The shores of New Hampshire and Vermont are linked anew as all major structural steel components have been assembled! Installing cross-frames, and placing and tensioning bolts will continue through next week.

The northbound shoulder will continue to be closed all week long and motorists are advised to watch for vehicles entering and exiting the construction site.

Delivery of steel to the abutment site on Vermont Route 142 is currently scheduled for Monday, April 29th, and Wednesday, May 1st. The delivery route is planned to provide direct access from the south along VT 142 from Massachusetts Route 10. Flaggers and Uniformed Traffic Officers will be available to assist with the delivery, however it is not anticipated to require a lane closure. When the steel is ready to be moved from the truck to the bridge, a brief hold of all traffic on VT 142 will be required.

One way alternating traffic patterns with flaggers will be implemented on Vermont Route 142 adjacent to the construction site on Monday and Tuesday next week. The northbound shoulder will be closed all week long and motorists are advised to watch for vehicles entering and exiting the construction site.

Delivery of steel to the abutment site on VT 142 is currently scheduled for Wednesday, April 24th, Monday, April 29th, and Wednesday, May 1st. The delivery route is planned to provide direct access from the south along VT 142 from Massachusetts Route 10. Flaggers and Uniformed Traffic Officers will be available to assist with the delivery, however it is not anticipated to require a lane closure. When the steel is ready to be moved from the truck to the bridge, a brief hold of all traffic on VT 142 will be required.

A short duration closure (approximately 15 minutes) of VT/NH 119 can be expected today April 10th, tomorrow April 11th, Monday April 15th, and Wednesday April 17th at 11:00 a.m. for structural steel deliveries.

The delivery route of the structural steel to the Barrows and Fisher yard where the Pier 1 site is located will be along New Hampshire and Vermont Route 119 to Depot Street. This impact will include a short duration closure (approximately 15 minutes) of the twin bridges beginning at the intersection of Bridge Street to Canal Street, Main Street, and Vermont Route 142. Uniformed Traffic Officers will be located at the intersection’s entrance to Bridge Street during the closure period.

Delivery of steel girders to Pier 1 is scheduled for Tuesday through Thursday, April 9th, 10th, and 11th, and Monday, April 15th.

The delivery route will be along New Hampshire and Vermont Route 119 to Depot Street. This impact will include a short duration closure (approximately 15 minutes) of the twin bridges beginning at the intersection of Bridge Street to Canal Street, Main Street, and Vermont Route 142. Uniformed Traffic Officers will be located at the intersection’s entrance to Bridge Street during the closure period. All deliveries are tentatively set for 1:00 p.m. to accommodate the train schedule.

The contractor’s crews have been accessing the Vermont Abutment off of Vermont Route 142 and will continue to access this location next week. No traffic impacts are anticipated, but motorists are advised to watch for vehicles, including concrete trucks, entering and exiting the construction site.

Delivery of steel girders to Pier 1 is scheduled for Tuesday through Thursday, April 9th, 10th, and 11th, and Monday, April 15th.

Work has continued on the cap for Pier 1 with the rebar being flown into place and tied atop the stem. Form work for the cap will be completed, bearing seats fully constructed, detail work finished, and everything fully adjusted to match plan location and elevation prior to the scheduled concrete placement next Tuesday.

Additional crews may begin work on the drainage installation required in the Barrows and Fisher yard late next week.

Crews have stripped all forms for the Pier 1 footing and stem. The footing has now been backfilled with clean stone and the cofferdam sheets have been pulled. Work has begun on the cap for Pier 1 and forms are being placed. Next Tuesday, the cap rebar will be placed on top of the stem and the remainder of the week will be spent tying the cap to the stem, installing formwork, and making final adjustments to be ready for concrete. Another crew may begin work on drainage installation required in the Barrows and Fisher yard next week as well.

The placement of 105 CY of concrete for the Pier 1 stem was accomplished efficiently yesterday and is now in its cure period. Crews are continuing work on the Pier 1 cap and will begin stripping the footing forms and conducting clean up of the Barrows and Fisher site. An additional crew is back at the VT Abutment site to make improvements to the bearing seats prior to structural steel placement. The pedestals will need to be brought up in elevation approximately 1.5″ so they will be chipped out and re-cast cleanly.

Next week, if early strength tests are adequate, work will begin on placing the Pier 1 cap steel and forms atop the stem, stripping stem formwork, possibly backfilling the footing, and removing the cofferdam sheets.

Recent favorable weather has helped the cure of the footing at Pier 1 and the strength of the concrete has allowed crews to move forward with the work on the Pier 1 stem and cap. As the stem rebar is placed and tied, form walls and corners will be set. Once the stem rebar is complete, crews will finish the cap rebar. The next concrete placement will be for the Pier 1 stem and is scheduled for Wednesday, March 6th.

Pier 1’s footing concrete was placed successfully this past Tuesday – all 220+ cubic yards of it. The contractor is waiting for the concrete to cure and achieve strength sufficient to begin work on the stem which could be as early as tomorrow and will progress into next week and the week after. In the meantime, care is being taken to keep the concrete hydrated and at an optimal temperature.

The Pier 1 cofferdam continues to have manageable groundwater flows and keeping it de-watered has been a non-issue. The formwork for the footing is mostly complete with the final bracing being finished in preparation for concrete. The footing rebar is in place and almost completely tied and the crews will move on to working on the stem and cap rebar. This work will continue into next week. Formwork will also progress on the stem and cap into next week. Concrete placement for the footing is still scheduled for Tuesday, February 20th.

The Pier 1 cofferdam has maintained a de-watered state with manageable flows. The pipe piles have been cut to grade with steel reinforcement and concrete placed. The top of the concrete tremie is currently being cleaned to prepare for footing forms and rebar. Forms should begin to be placed today and tomorrow with rebar placed and tied beginning next week. Welding of studs is expected to be complete by this week’s end. The first concrete placement for the footing is scheduled for Tuesday, February 20th.

Additional steel deliveries to the Pier 1 site in Vermont will be scheduled at a later date. Details will follow once available.

The delivery route will be along New Hampshire and Vermont Route 119 to Depot Street. This impact will include a short duration closure (approximately 10 minutes) of the twin bridges beginning at the intersection of Bridge Street to Canal Street, Main Street, and Vermont Route 142. Uniformed Traffic Officers will be located at the intersection’s entrance to Bridge Street during the closure period. While a time has not been set, all deliveries to Vermont will be off peak hours.

The recent weather has stalled steel delivery to the site, and the advance of structural steel across Pier 2 to the temporary shoring towers has been placed on hold until deliveries resume.

De-watering at the Pier 1 cofferdam continues to face ongoing challenges. The amount of water coming into the cofferdam is still too high a volume for the water treatment systems and the environmental permits. The contractor and engineering teams are analyzing the current systems in place to receive the site discharge as well as the configuration of the cofferdam to see what can be done to remedy this situation and continue with the work.

De-watering operation on hold pending further analysis.

The contractor has begun to advance structural steel across Pier 2 to the temporary shoring towers. This work will continue into next week. De-watering at Pier 1 site encountered several challenges last week and additional work has taken place to remediate the situation this week. The saturated conditions of the site and soil conditions have necessitated that the cofferdam be tighter in order to allow less water infiltration so the de-watering system will not be overwhelmed by the volume. The contractor has installed vertical forms at all four corners of the cofferdam and anticipates placing concrete today in order to achieve a better seal. The contractor will attempt de-watering again next week once the concrete has set up. Once a dry excavation can be maintained, the contractor will begin to install the 80 foot rebar cages in the 9 pier piles which may begin as early as next week. Footing formwork and re-bar installation may begin next week as well, overlapping with the pile operations.

The contractor has begun to advance structural steel across Pier 2 to the temporary shoring towers. This work will continue into next week. De-watering at Pier 1 site has begun. Once a dry excavation can be maintained, the contractor will begin to install the 80 foot rebar cages in the 9 pier piles. This could begin as early as tomorrow and be completed in time for a concrete placement for the piles as early as next week. The footing formwork and re-bar installation should begin next week as well. This operation can be conducted in tandem with the pile work.