Alert: Detours and Night Work in West Hempstead.

Continuing Monday, July 13, 2020, night work and detours should be expected on Hempstead Avenue. See "News" for more information.

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 "social 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 social 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 July 13, 2020.

Construction continues in Garden City, Malverne and West Hempstead. Please 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
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  • 2017

Alert: Detours and Night Work in West Hempstead.

July 13, 2020.

Detours, night work planned for Hempstead Avenue, West Hempstead.

Location of Work: Hempstead Avenue in the areas of Coolidge Street and Maplewood Avenue.

Description of Work: Trenching for the installation of conduit during nighttime work hours with detours and road closures.

Timeframe of Work: Nighttime work hours.

Details of Work: Continuing on Monday, July 13, 2020, crews will begin trenching within the West Hempstead business district on Hempstead Avenue during nighttime work hours. This essential work is planned for night time work hours to lessen impacts to local businesses, traffic and for overall safety purposes.

During these activities, crews will be trenching Hempstead Avenue between Coolidge Street and Maplewood Avenue to place the new electric conduits into the roadway. Hempstead Avenue will be restored and passable during daytime hours.

During the work, Hempstead Avenue will be closed to traffic and detours will be put into place using Langley and Adams Avenues. Traffic heading northbound on Hempstead Avenue will be diverted to Langley Avenue, while traffic heading southbound will be diverted to Adams Avenue. In addition, a new detour using Adams Avenue to Fairlawn Avenue to Maplewood Avenue will be employed. Temporary no parking barriers will be placed on Adams and Langley Avenues to promote single-side parking and a free-flow of traffic.

Work is expected to take one to two weeks in this area. Crews will continue working northward along Hempstead Avenue, and new detours will be established in the coming weeks. The work will continue at night.

Travel impacts: Road closures, detours, and traffic control measures should be expected during the trenching. 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, July 13, 2020.

July 13, 2020.

The following is the construction update for the Village of Garden City. The following work schedule is for the weeks of Monday, July 13, 2020 and Monday, July 20, 2020.

Location of Work: Westminster Road/Rockaway Avenue; the grassy area opposite the Stewart School on Stewart Avenue east of Clinton Road and the grassy median of Stewart Avenue east of Waterbury Road.

Description of Work:  Horizontal Directional Drill (HDD) No. 2; cable pulling.

Timeframe of Work: Daytime hours.

Details of Work: On Monday, July 13, 2020, crews will be finalizing Horizontal Directional Drill No. 2 on the grassy area opposite the Stewart School on Stewart Avenue in the area of the former Chase Bank, east of Clinton Road, and in the grassy median of Stewart Avenue east of Waterbury Road. During the drilling activities, the right eastbound lane of Stewart Avenue east of Clinton Road will be closed. Travelers are advised of a new traffic pattern. Activities will be during daytime hours. It is anticipated that de-mobilization will occur within one week. On Thursday, July 23, 2020, it is anticipated that crews will be working at Splice Vault No. 16, located near Third Street on Rockaway Avenue, preparing the conduits for cable pulling. Single lane closures are expected with this activity, planned for daytime hours.

Travel impacts: A single lane closure on Stewart Avenue east of Clinton Road. 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 West Hempstead for Monday, July 13, 2020.

July 13, 2020.

The following is the construction update for the Town of Hempstead, the area of West Hempstead, for the weeks of Monday, July 13, 2020 and Monday, July 20, 2020.

Location of Work: Hempstead Avenue, Westminster Road, Dogwood Avenue.

Description of Work: Trenching for the installation of conduit; preparation for horizontal directional drilling; preparation for cable pulling.

Timeframe of Work: Daytime and nighttime work hours.

Details of Work: On Monday, July 13, 2020, crews will continue trenching operations on Hempstead Avenue between Splice Vault No. 10, located in the southbound lane at the corner of McKinley Street, to Splice Vault No. 11, which is located in the southbound lane at the corner of Chestnut Street. Crews will excavate a trench in the pavement to allow for the placement of the new electric conduits, and restore the road for passage afterwards. A separate crew will be working in the reverse direction from No. 11 to No. 10. The work is planned for nighttime work hours. NOTE: Full road closures and detours of Hempstead Avenue during nighttime activities are expected. Please see the "News” section for the description of the detours.  Also on Monday, July 13, 2020, crews will begin trenching from Splice Vault No. 11 to Splice Vault No. 12, which is located on Hempstead Avenue in the southbound lane near the intersection with Sycamore Street. These activities will be similar to those stated above, and will also be during nighttime work hours. Detours for this portion of the work are detailed in the "News” section as well. Please see this website for greater details. On Wednesday, July 15, 2020, crews will be pulling cable between Splice Vault No. 6, located on Dogwood Avenue in the Village of Malverne, and Splice Vault No. 7, located on Hempstead Avenue near the intersection with Cornwell Avenue. Pulling includes the use of large cable reels to spool the electric cable through the splice vault manhole covers into the new underground conduits. Pulling equipment will be located on the opposite end. Single lane closures in the immediate area should be expected, as well as traffic controls. Work is planned for daytime hours. On Friday, July 17, 2020, trenching is anticipated to begin between on Hempstead Avenue at Splice Vault No. 12, located at the intersection with Sycamore Street, and Splice Vault No. 13, located on Westminster Road near Oak Street. Trenching will be similar as described above. On Monday, July 20, 2020, crews are anticipated to begin cable pulling at Splice Vault No. 14, located near Trinity Place on Westminster Road, and Splice Vault No. 15, located on Westminster Road just south of First Street. Finally, crews will be working on Westminster Road at the former Wholesale Liquidators plaza to performing the horizontal directional drill (HDD) under the Hempstead Turnpike. This activity will be continuous. During the drilling operations, which are planned for the next six to eight weeks, the right, northbound lane of Westminster Road south of the Turnpike, and the center lane north of the Turnpike, will be closed to traffic.

Travel impacts: Single lane closures, road closures, detours, and traffic control measures should be expected during the trenching. 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 Malverne for Monday, July 13, 2020.

July 13, 2020.

The following is the construction update for the Village of Malverne. The following work schedule is for the weeks of Monday, July 13, 2020 and Monday, July 20, 2020.

Location of Work:  Broadway, Dogwood Avenue.

Description of Work: Cable pulling, splicing.

Timeframe of Work: Daytime work hours, continuous operations.

Details of Work:  On Monday, July 13, 2020, crews will begin cable pulling activities between Splice Vault No. 4 on Broadway near the intersection with Alnwick Road, and Splice Vault No. 5 at the corner of Dogwood Avenue and Hempstead Avenue. Crews will bring in large cable spools and feed the new electric transmission cables into the splice vault manholes, and then into the underground conduits. Pulling equipment will be present at both splice vaults. Work is planned for daytime hours. On Tuesday, July 14, 2020, splicing work will begin at Splice Vault No. 5. The work is continuous but non-obtrusive, and is expected to last up to six days. Crews working in the splice vault and a climate-controlled work trailer will complete the splice of the newly-pulled cables. On Wednesday, July 15, 2020, crews will pull cable from Splice Vault No. 6, located on Dogwood Avenue, to Splice Vault No. 7, located on Hempstead Avenue in West Hempstead. Activities are planned for daytime hours as previously described. Finally, on Tuesday, July 21, 2020, crews will begin splicing at Splice Vault No. 6. These operations will also be continuous.

Travel impacts: Single lane closures and traffic control measures should be expected during the cable pulling and splicing. 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).


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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