Detour alert: Franklin Avenue in Malverne.

Full road closures of Franklin Avenue between Broadway and Whitehall Street in Malverne are under way. See "News" for more details.

Detour alert: Whitehall Street in Lynbrook.

Whitehall Street between Franklin Avenue and Merrick Road will be closed to traffic beginning Monday, September 28, 2020 at 7 a.m. Please see "News" for more details.

A brief message on COVID-19

PSEG Long Island is deeply committed to the health, safety and wellbeing of our customers, employees and our communities. We ask that customers remain in their homes while crews are working nearby. If customers must speak with our crews, we ask that they practice responsible "physical distancing" and remain at least 6 feet away to ensure the health of everyone involved. The contractor for this project has provided PSEG Long Island with its safety plan, which meets current regulatory requirements with respect to COVID-19, including physical distancing measures.

We are leveraging the guidance of the CDC and state and local authorities in the areas we operate. At PSEG Long Island, we know that our customers rely on us to power their lives and businesses. We are doing our part in fulfilling this commitment.

Construction update for September 21, 2020.

Heavy construction and detours under way in numerous areas for Monday, September 21, 2020. See "News" for more details.

PSEG Long Island WNTP Phase 2 EM&CP approval by NYSPSC

See the "News" and "Document Library" sections of the website regarding the approval by the New York State Public Service Commission of Phase 2 of the EM&CP for the WNTP.

Project receives EM&CP approval

The New York State Public Service Commission has granted an "Environmental Management and Construction Plan" approval for the Western Nassau Transmission Project. Please see the Document Library for more information.

NY State Electric Transmission Certification

PSEG Long Island received a "Certificate of Environmental Compatibility and Public Need" on Thursday, Sept. 19, 2019 from the New York State Public Service Commission.

News & Events

  • 2020
  • 2019
  • 2018
  • 2017

ALERT: Whitehall Street in Lynbrook road closure.

September 24, 2020.

Weekday daytime road closure of Whitehall Street in Lynbrook to begin.

Location of Work: Whitehall Street in Lynbrook between Merrick Road and Franklin Avenue (North Lynbrook).

Description of Work: Trenching for conduit installation.

Timeframe of Work: Monday through Friday, 7 a.m. to 7 p.m.

Details of Work: On Monday, September 28, 2020, three crews will begin the trenching work on Whitehall Street in Lynbrook between Merrick Road and Franklin Avenue in North Lynbrook. Crews will excavate the utility trench along the berms of the concrete panels, place the new electric conduits into the trench, and use cementitious backfill to restore the roadway. During the work, parking on Whitehall Street will be prohibited. Residents will be permitted to use side streets for overnight parking between September 28, 2020 and October 10, 2020. 

Those living on Whitehall Street will have local traffic access.

Questions: For Questions: Contact us by hotline (516-780-0665); website (www.westernnassautransmission.com); email (info@westernnassautransmission.com).


ALERT: Franklin Avenue road closures.

September 21, 2020.

Temporary detour on Franklin Avenue between the Long Island Rail Road crossing and Whitehall Street.

Location of Work: Franklin Avenue from Broadway (Long Island Rail Road crossing) to Whitehall Street (North Lynbrook).

Description of Work: Trenching and vault installation.

Timeframe of Work: Continuous work hours.

Details of Work: On Monday, September 21, 2020, beginning at 7 a.m. and lasting for approximately six days, Franklin Avenue south of the Long Island Rail Road crossing at Broadway will be closed to thru traffic to Whitehall Street in North Lynbrook. Travelers headed southbound on Franklin Avenue will be detoured to Cornwell Avenue south, to Merrick Road east, Peninsula Boulevard north, and Hempstead Avenue north to "Five Corners" to rejoin Franklin Avenue. Travelers northbound on Franklin Avenue will be detoured in reverse, or can use Hempstead Avenue to access northern parts of Malverne Village. Those coming from the north headed east are encouraged to use Corona Avenue in Valley Stream south to Merrick Road to avoid the detour.

Those living on Franklin Avenue will have local traffic access.

Questions: For Questions: Contact us by hotline (516-780-0665); website (www.westernnassautransmission.com); email (info@westernnassautransmission.com).


Construction update for West Hempstead for Monday, September 21, 2020.

September 21, 2020.

The following is the construction update for the Town of Hempstead, the area of West Hempstead, for the weeks of Monday, September 21, 2020 and Monday, September 28, 2020.

Location of Work: Hempstead Avenue.

Description of Work: Cable splicing.

Timeframe of Work: Continuous operations.

Details of Work:  Generally, crews will be performing splicing operations at various locations on Hempstead Avenue and Westminster Road throughout the next two weeks. Those include Splice Vault No. 12, located at Sycamore Street (continuing on Monday, September 21, 2020); Splice Vault No. 13 on Westminster Road near Oak Street (beginning Friday, September 25, 2020); and Splice Vault No. 14 on Westminster Road north of the Hempstead Turnpike (beginning on Friday, October 2, 2020). Crews will work inside a climate-controlled trailer over the splice vault and inside the splice vault, finalizing the splicing. The work is continuous and lasts approximately six days. 

Travel impacts: Single lane closures and traffic control measures should be expected during the splicing activities. Travelers should avoid the area if possible. Please see this website for more details when they arise. Questions: Contact us by hotline (516-780-0665); website (www.westernnassautransmission.com); email (info@westernnassautransmission.com).


Construction update for the Village of Garden City for Monday, September 21, 2020.

September 21, 2020.

The following is the construction update for the Village of Garden City. The following work schedule is for the weeks of Monday, September 21, 2020 and Monday, September 28, 2020.

Location of Work: Stewart Avenue, Cherry Valley Avenue, Ninth Street, Hilton Avenue.

Description of Work: Trenching, cable pulling, cable splicing.

Timeframe of Work: Daytime and nighttime hours.

Details of Work:  On Monday, September 21, 2020, crews will be on Stewart Avenue in the area of Butler Place performing restoration of the grassy median and the pavement areas. Work is planned for daytime hours. Single lane closures may occur during these activities. On Friday, September 25, 2020, crews will continue trenching between Splice Vaults No. 22 and 23 in the eastbound lanes of Stewart Avenue. The work is planned for nighttime hours. Temporary lane and road closures should be expected with this work. Crews will excavate the pavement, place the new electric conduits, and use cementitious backfill to restore the roadway. On Monday, September 21, 2020, crews will begin the process of cable pulling at Splice Vaults No. 17 (Cherry Valley Avenue near Sixth Street), No. 18 (Ninth Street between Cherry Valley Avenue and Hilton Avenue), No. 19 (Hilton Avenue south of Ninth Street), No. 20 (Village Hall green), and No. 21 (Stewart Avenue near Butler Place). Crews generally will swab and clean the newly-installed electric conduits, and prepare them for cable pulling. Cable pulling includes the use of large spools to help pull the cable through the splice vaults and conduits. Large equipment and single lane closures should be expected at each of these vaults. The work is planned for daytime hours. Finally, On Thursday, October 1, 2020, crews will begin splicing at Splice Vault No. 17. Crews will use a climate-controlled work trailer to work above and below the street level to complete the splice. The work is continuous for approximately six days. Single lane closures at the work trailer should be expected with this activity.

Travel impacts: Single lane closures should be expected with all of these activities. Please see this website for more details when they arise. Questions: Contact us by hotline (516-780-0665); website (www.westernnassautransmission.com); email (info@westernnassautransmission.com).


Construction update for the Village of Malverne for Monday, September 21, 2020.

September 21, 2020.

The following is the construction update for the Village of Malverne. The following work schedule is for the weeks of Monday, September 21, 2020 and Monday, September 28, 2020.

Location of Work:  Franklin Avenue.

Description of Work: Trenching and vault placement.

Timeframe of Work: Daytime and nighttime work hours.

Details of Work:  On Monday, September 21, 2020, trenching is anticipated to begin on Franklin Avenue between the Jack and Bore pit at 97 Franklin Avenue south of the railroad crossing, and Whitehall Street. The work will be continuous (daytime and nighttime hours) beginning on Tuesday, September 22, 2020. Full road closures on Franklin Avenue from Broadway to Whitehall Street are expected with these activities. Crews will excavate the pavement, place the new electric conduits, and use cementitious backfill to restore the roadway. On Monday, September 21, 2020, crews will be installing Splice Vault No. 3 in the middle of Franklin Avenue near Ryder Avenue. The work will be during nighttime hours. Full road closures of Franklin Avenue from Broadway to Whitehall Street are expected with this activity. Crews will excavate the pavement, use cranes to position the splice vault, and restore the roadway for travel. Details on the detours will be posted on this website in the "News” section.

Travel impacts:  Full road closures during the trenching and vault placement. Travelers should avoid the area if possible. Please see this website for more details in the "News” section. Questions: Contact us by hotline (516-780-0665); website (www.westernnassautransmission.com); email (info@westernnassautransmission.com).


Construction update for the Village of Lynbrook for Monday, September 21, 2020.

September 21, 2020.

The following is the construction update for the Village of Lynbrook. The following work schedule is for the weeks of Monday, September 21, 2020 and Monday, September 28, 2020.

Location of Work: Whitehall Street.

Description of Work: Trenching operations.

Timeframe of Work: Daytime work hours.

Details of Work: On Monday, September 21, 2020, trenching is anticipated to begin on Whitehall Street from Franklin Avenue to Stuart Street and Splice Vault No. 2. The work is planned for daytime hours. Crews will excavate the pavement, place new electric conduits, and use cementitious backfill to restore the roadway. Single lane closures are expected during this activity. On Monday, September 28, 2020, trenching is anticipated to also begin on Whitehall Street at the Valley Stream Substation heading north to Splice Vault No. 1, located between Whittier and Webster Streets. The work is planned for daytime hours. Single lane closures are expected with this activity, which will be similar to what is described above.

Travel impacts: Single lane closures for trenching are expected. Travelers should seek alternative routes. Please see this website for more details when they arise. Questions: Contact us by hotline (516-780-0665); website (www.westernnassautransmission.com); email (info@westernnassautransmission.com).


Construction update for Uniondale for Monday, September 21, 2020.

September 21, 2020.

The following is the construction update for Hempstead, the area of Uniondale. The following work schedule is for the weeks of Monday, September 21, 2020 and Monday, September 28, 2020.

Location of Work: Stewart Avenue in the eastbound lanes from the Village of Garden City border.

Description of Work: Trenching operations.

Timeframe of Work: Nighttime work hours.

Details of Work: On Friday, September 25, 2020, crews are anticipated to resume trenching between Splice Vault No. 22, located on Stewart Avenue in the eastbound lanes east of Clinton Road, to Splice Vault No. 23, located in the Stewart Plaza parking lot adjacent the substation and Hurricane Wings/Goldfish Swim School. The work is planned for nighttime hours. Crews will excavate the pavement, place the new electric conduits, and use cementitious backfill to restore the roadway. Travelers are advised of single lane closures and possible temporary detours during these activities.

Travel impacts: Single lane closures for trenching are expected. Travelers should seek alternative routes. Please see this website for more details when they arise. Questions: Contact us by hotline (516-780-0665); website (www.westernnassautransmission.com); email (info@westernnassautransmission.com).


PSEG Long Island receives approval for Phase 2 of the EM&CP for the WNTP.

April 1, 2020
Effective March 20, 2020, the New York State Public Service Commission has approved the "Phase 2" of the PSEG Long Island Western Nassau Transmission Project "Environmental Management and Construction Plan." This phase of the "EM&CP" focuses primarily on work in the area of Stewart Avenue and Clinton Road in the Village of Garden City. On Wednesday, April 1, 2020, the Notice to Proceed for construction of Phase 2 was approved. For more information on this approval, please see the "Document Library" below.


PSEG Long Island announces construction start of the Western Nassau Transmission Project.

Nov. 22, 2019
PSEG Long Island announces the proposed construction start date for the Western Nassau Transmission Project.

Learn More


NYSPSC approves Environmental Management & Construction Plan

Nov. 19, 2019
On Tuesday, Nov. 19, 2019, PSEG Long Island received the approval from the New York State Public Service Commission for its "Environmental Management & Construction Plan" or "EM&CP," which provides for the processes and practices to build the Project. Please check the website in the coming days for updates on pending construction activities associated with the Project. For more information on the approval, see the Document Library in the website's Permitting section.


NY State Electric Transmission Certification

September 19, 2019
PSEG Long Island received a "Certificate of Environmental Compatibility and Public Need" on Thursday, Sept. 19, 2019 from the New York State Public Service Commission. Please click here to see the Certificate.

Learn More


Project Mailing

March 26, 2018
We have recently mailed a letter and fact sheet to the abutting neighbors to our identified routes. If you have questions, please contact us directly.


Municipal Outreach Begins

December 1, 2017
Representatives of PSEG Long Island and WNTP team will be reaching out to the municipal officials in the Project area.


NY State Article VII Process

December 1, 2017
Have questions about the New York State Article VII process?

Learn More


Open Houses Planned

March 1, 2017
Check back for scheduling of future open houses in your community.


About the Project

Project Mission Statement:

The reliability upgrades PSEG Long Island is planning to construct are necessary to keep pace with the growing demand for electricity. PSEG Long Island has proposed a new, 138 kilovolt (138 kV) underground transmission line (The Western Nassau Transmission Project or WNTP) between two area substations to address an important need within the electric grid. The new line will make the system more resilient and will improve redundancy, which is vital to the long-term reliability of the energy grid. The line must be installed by 2020 for PSEG Long Island to continue to maintain a safe, robust, and reliable system, and remain in compliance with mandatory federal regulations.

Benefits of Improved Reliability

1 Second Circuit

The new 138kV underground transmission line adds a second circuit to serve the substations, providing redundancy in the case of an electric system impact. This improves the reliability of the electric grid for residents and businesses of western Nassau County.

2 Will Serve the Public for Years

While much of New York’s transmission infrastructure is aging, the new facilities proposed will serve the public for years to come.

3 Over Public Land

Unlike many new electric transmission lines that are built mostly over private property, most of this project will be located in roads and other public rights-of-way.

4 Public Participation

Public participation in the Article VII process is welcome and key to the success of PSEG Long Island and this Project.

About the Permitting Process

To construct the Project, PSEG Long Island will need, in addition to other necessary permits,
  • Two approvals from the New York State Public Service Commission under Article VII of the Public Service Law, the Certificate of Environmental Compatibility and Public Need, and Approval of an Environmental Management & Construction Plan (EM&CP)
  • Federal approval from the U.S. Army Corps of Engineers
  • New York State approval from or consultation with the New York Department of Environmental Conservation, New York State Office of Parks, Recreation & Historic Preservation and the New York State Department of Transportation
  • Local approval from the Long Island Rail Road
  • Consultation with Nassau County and the municipalities along the route

Document Library

Construction Process

Underground construction involves five key phases.

1. Splice Vault Install:

Underground vaults will be installed at intervals along the route to splice together underground cable.

2. Duct Bank Install:

Crews will ready roadways and install an underground duct bank in which the new cable will be installed.

3. Restoration:

Following the completion of splice vault and duct bank installation, excavated areas will be restored.

4. Cable Installation:

Underground cable comes on trucks specifically designed for the installation of underground cable. Crews will pull cable from one splice vault to another along the Project route.

5. Cable Splicing:

Crews will set up a climate controlled environment at each splice vault location to splice the underground cables together. This activity is continuous for approximately one week for each splice vault.

Frequently Asked Questions

  • What is the Article VII Process?
  • Is the public allowed to participate in this process?
  • What are the benefits of the Project?
  • Will you need to purchase new property to build this transmission line?
  • Can LIPA/PSEG Long Island use eminent domain?
  • What are EMF? Are they unsafe?
  • How does the Company account for environmental impacts caused by the Project?
  • What will be the traffic impacts of the Project?

Article VII of the New York State Public Service Law, "Siting of Major Utility Transmission Facilities,” requires a full environmental, public health and safety impact review of the siting, design, construction, and operation of major transmission facilities in New York State. Any proposed electric transmission line with a design capacity of 100,000 volts (100kV) or more extending for at least 10 miles, or of 125kV or more extending a distance of at least one mile, must submit an application to the New York State Public Service Commission (Commission) for a Certificate of Environmental Compatibility and Public Need.

Article VII prescribes the content of an application, including a description of the project’s location, alternative locations, expected economic effects and environmental studies. The Commission makes the final decision regarding all Article VII applications after careful review and with public input. For a complete description of the application review process, please refer to the Commission’s Article VII Review Process Guide at: Article VII Guide Web 9-14-16 Final.pdf (dps.ny.gov website)

Yes, once the Western Nassau Transmission Project (WNTP) Article VII application is filed, there will be several opportunities for individuals to participate in the Article VII review process, and PSEG Long Island encourages our neighbors to contact us with their questions and concerns. The need for and the proposed location (and alternative locations) for this 138kV underground transmission line, as well as its cost, environmental impact, and construction and maintenance practices, are all subject to review. To maintain and promote an open and transparent permitting process, the WNTP Public Outreach Team ensures that affected landowners and the public receive important project information, and the ability to ask questions and voice concerns.  We can be contacted:

The WNTP Team will inform the public by mail or newspaper publication about key project milestones. Nearby landowners will receive correspondence from the Team during the permitting process. Prior to the start of construction, these landowners will receive written notification, and as the stages of construction unfold, landowners will receive periodic updates.

Members of the public can also provide comments to the New York State Public Service Commission (Commission) at any time during the Article VII process.  This can be done by sending a written statement (electronically or via mail) to the Secretary to the Commission, filling out a "Comment Form” on the Commission’s website, or calling the Commission’s Opinion Line (1-800-335-2120).  This line is set up to take comments about pending cases from in-State callers, 24 hours a day. These comments are not transcribed verbatim, but a summary is provided to the Commission.  Additionally, the public is encouraged to attend Public Statement Hearings, which are conducted by the Commission in the project vicinity to receive statements of position or concern from residents affected by the project proposal.  These statements from the public are entered into the official record upon which the Commission will ultimately base its decision.

  • The new 138kV underground transmission line adds a second circuit between the East Garden City and Valley Stream substations, providing redundancy in the case of an electric system impact. This improves the reliability of the electric grid for residents and businesses of western Nassau County.
  • While much of New York’s transmission infrastructure is aging, the proposed new facilities will serve the public for years to come.
  • The underground transmission line provides storm and weather hardening and resiliency (i.e. underground versus the more weather-susceptible overhead lines).
  • Unlike many new electric transmission lines that are built mostly over private property, most of this project will be located in roads and other public rights-of-way.
  • Public participation in the Article VII process is welcome and key to the success of PSEG Long Island and this important Project.

During the siting and routing process, PSEG Long Island and its contractors have worked to lessen the overall need for new property to build the proposed transmission line by using public rights-of-way to the greatest extent possible. Since an overhead transmission alternative was not viable to interconnect the two substations in question, an underground solution has been proposed.

The proposed route is subject to approval of the New York State Public Service Commission, and the final scope of property rights to be acquired for this Project will not be determined until late in the permitting process. Currently, our assessment is that this scope of property rights will be quite narrow: one parcel acquisition could possibly be done to provide a corridor on which the new underground line would enter the East Garden City Substation; and a small number of easements adjacent to roads along the route might be necessary, although even most of these would be temporary easements in effect only for the construction period.

If you have any questions or concerns about the acquisition process, please contact us via our hotline or website email (info@WesternNassauTransmission.com).

As a public authority, The Long Island Power Authority, and PSEG Long Island as its operating entity, have the right to exercise eminent domain for projects such as this Project. Eminent domain cannot be exercised until the Project is officially certified with a Certificate of Environmental Compatibility and Public Need, and the Environmental Management and Construction Plan is approved by the New York State Public Service Commission.

However, LIPA and PSEG Long Island strive to resolve all real estate acquisition concerns in an amicable and mutually agreeable fashion when at all practical.

Electric and magnetic fields can be generated from a wide variety of sources, including transmission lines. We recognize that there is scientific uncertainty as to whether EMF have an effect on health or not, but we design our lines to adhere to New York State guidelines.

The World Health Organization (or WHO) provides detail and study regarding the relationship between humans and EMF. The WHO is an independent non-governmental organization which has collected data from hundreds of studies regarding EMF, and has compiled its data on its website:www.who.int.

The electric field from the WNTP will be blocked by the cable shielding and will not be present aboveground. We conducted a model analysis of the anticipated aboveground magnetic field (MF) levels from the WNTP during normal operation of the line. The results of the study demonstrate that the anticipated MF levels of the WNTP would be well below the maximum levels allowed by New York State Public Service Commission guidelines.

Two of the primary advantages of an underground transmission system are the environmental benefits of (a) the ability to construct the system through or into areas where right-of-way is not available and (b) the reduced visibility of an underground system.

Exhibit 4 of the Article VII application will detail the consideration we gave to the impacts and tentative proposed mitigation for potential environmental impacts, including: cultural resources; rare, threatened and endangered species; sensitive habitats including wetlands, contaminated or unique soils and water resources; and EMF.

Detailed design will incorporate environmental impact mitigation, which will be contained within the Project’s Environmental Management and Construction Plan (EM&CP).

Traffic studies will be conducted to determine the potential impacts to the vehicular flow within the Project area. Traffic impacts will be minimized as much as possible to not disturb commuter flow, or the needs of emergency services. The WNTP team will work with Nassau County and the various municipalities to identify potential detour routes where applicable.

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