Project Overview


Overnight Travel Restrictions – Route 146 Conduit Installation (Jan 31 – Feb 3)

As one of the final steps of the Power4Tomorrow Project, National Grid and its contractors will be installing new electrical conduit below Route 146 (near Admiral Street) over the next few months using a micro-tunneling process. Prior to the start of the tunneling process, crews will need to complete surface-level surveying of the tunnel path, which will require temporary overnight lane closures January 31 – February 3 from 9:00pm-5:00am. During those hours, travel will be restricted to one lane in each direction. The Admiral Street off-ramp and Charles Street on-ramp will remain open while the restrictions are in place. National Grid does not anticipate any additional impact to Route 146 traffic while the tunneling work is taking place (all equipment and activity will be staged in the grass areas adjacent to the highway). Additional updates will be provided as work progresses.


Phase II Construction Update

National Grid made significant progress on Phase II of its Power4Tomorrow construction plan during 2021. Most of the new duct bank and manhole installations were completed during Phase II, with just the micro-tunnel below Route 146 awaiting completion (anticipated early summer 2022). During this winter/spring, contractors will finish pulling and splicing the new cable inside the duct banks and manholes. This work involves compact work zones in the vicinity of the new manholes where trucks will be used to pull the new cable and later splice them together (no additional excavation work is required during this process). Any remaining sidewalk restoration, along with a repaving of the entire project route (Dollar Street to Admiral Street), will take place in spring 2022. National Grid will continue to coordinate work with impacted abutters for the duration of the project. All work zones will be clearly marked and protected, and a traffic management plan will be in place. Project progress can be followed on our interactive map.


As the name implies, National Grid’s Power4Tomorrow: Downtown Reliability Project is an investment in the city’s electrical transmission infrastructure aimed at reinforcing the safe and reliable delivery of power throughout the Downtown Providence area, and beyond, for years to come.

Located entirely within existing rights-of-way – including travel lanes and sidewalks – along South Main Street, North Main Street, Charles Street and Admiral Street, components of Power4Tomorrow include:

  • Replacement of approximately two miles of existing 115kV transmission lines (installed in 1939 and 1946) located between the corner of Clarkson Street and Admiral Street Cable Terminal and Dollar Street in Providence
  • Replacement of a majority of the existing manhole locations with duct bank (underground conduit), resulting in the elimination of approximately 44 manholes
  • Re-use of approximately 60% of existing duct bank to install modern underground cables
  • Significant equipment upgrades inside Admiral St. Cable terminal to support this project

Construction began in spring 2020 and is expected to be complete in early 2022. National Grid has worked closely with city and state officials to develop traffic management plans, and will coordinate with other entities (e.g. RIPTA) whose services will be directly impacted by this construction.

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