Tuesday, April 28, 2015

From latest Construction Alert: 5-6 nights of noisy overnight work planned at Atlantic/6th; B2 work nudged back

Well, by planting the news that the planned green roof on the Barclays Center will be installed soon, developer Greenland Forest City Partners also distracted from a significantly disruptive series of work on the Atlantic Yards/Pacific Park project.

According to the latest two-week Atlantic Yards/Pacific Park Construction Update, dated April 27 and circulated yesterday by Empire State Development after preparation by Greenland Forest City, there should be be five to six nights of noisy, disruptive overnight work at the intersection of Atlantic Avenue and Sixth Avenue.

(The document is at bottom; it was released yesterday at 6:14 pm, well after the Wall Street Journal reported on the green roof.)

No date was provided for the work, but a supplemental alert should be issued. Note that this is different from the planned one night of overnight work on Thursday, April 16 that was announced but did not come to fruition.

Though "temporary barriers with sound blankets will be installed around the work area to dampen the sound," the equipment includes noisy hoe rams, which are "powerful percussion hammer[s] fitted to an excavator for demolishing concrete structures or rocks."

Note that a 2012 report by a consultant to Atlantic Yards Watch suggested that the noise mitigation plan for Atlantic Yards go beyond the city Noise Code and consider measures taken by other major construction projects such as the Boston Central Artery and Tunnel Project, which banned the use of impact devices like hoe rams at night. That hasn't happened.

Crane timelines

Also, as noted in the Wall Street Journal, the crane planned for Flatbush Avenue to install steel on the roof will be assembled during the weekend of May 16-17.

As shown in the timeline at right, the original plan was to install that crane in January, well after the Atlantic Avenue crane was removed. Instead, they will both block traffic.

B2 work nudged back

Also note that plans for the B-2 modular tower have been nudged back slightly. The document states:
  • Preparatory work for the erection of the modules on site will be completed during this reporting period, and work related to the erection of modules for floors 11, 12, and 13 is expected to commence in May.
Though a delay is not indicated in the new document the previous document similarly stated:
  • Work related to the erection of modules for floors 11, 12, and 13 will commence during this reporting period.
Regarding the green roof, from the document:
  • Large steel truss deliveries to the B3 crane position will continue during this reporting period. Deliveries will be made to the B3 during overnight hours. The Atlantic Avenue crane will not be used for any more truss deliveries. Sedum delivery is expected to commence in this reporting period and will be lifted to the roof utilizing the Atlantic Avenue crane.
  • Subject to weather and receipt of necessary approvals, the B3 crane will be disassembled the weekend of May 8-10 and the Flatbush Avenue crane will be assembled the weekend of May 16-17.
Regarding LIRR Yard Activities - Block 1120 & 1121, from the document:
  • Foundation footing and pier as well as retaining wall installations will be ongoing.
  • Demolition of Atlantic Avenue retaining wall in Block 1120 will begin during this reporting period.
Note that the previous document stated that demolition would begin in that reporting period.

LIRR Yard Activities – Night/Weekend Work, Atlantic & Sixth Avenues, from the document:

During the overnight hours in this reporting period:
  • The contractor will be installing mini piles, tie down anchors and trenching across the 6th Avenue intersection of Atlantic Avenue.
  • The trench will be covered with road plates after the shoring and conduits have been installed.
  • While this work is underway, the crosswalk along the south side of Atlantic Ave and the sidewalk along the east side of 6th Avenue will remain open; the northbound travel lane between Pacific Street and Atlantic will be closed. Individuals looking to cross to the north side of Atlantic Avenue will be directed to do so at the intersection of Ft Greene Place and Atlantic Avenue.
  • Flagmen will be posted at the intersections of Pacific Street/6th Avenue and Atlantic Avenue/6th Avenue to direct traffic and pedestrians.
  • Given the need to close the intersection at Atlantic Avenue and 6th Avenue, this work is being performed at night pursuant to the DOT work permit. Work will commence after 9:30 pm and is expected to take 8 hours. While the work is underway, the contractor will have directional lighting in the work area and will be using various equipment, including excavators, tieback/minipile drilling rig, hoe rams with a mounted jackhammer and a boom truck. This work will require 5-6 nights of overnight work, and the exact dates will be determined after the issuance of necessary permits. Temporary barriers with sound blankets will be installed around the work area to dampen the sound. A supplemental update will be issued when the permits for this work are issued.
Atlantic Yards/Pacific Park Brooklyn Construction Alert April 27 2015

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