Lyndonville Substation Project
In 2009, Vermont Electric Power Company and Lyndonville Electric Department (LED) proposed to construct a substation north of the LED No. 2 substation in Lyndon, Vermont, to provide a redundant path and additional capacity to deliver power to Caledonia and Essex counties.
Needs & Benefits
The Lyndonville substation serves the area of Caledonia and Essex Counties. Failures of key transmission components cause low-voltage conditions that violate system standards, voltage instability/collapse, or thermal overloads, which could result in extended outages for the areas served by the transmission system.
Transmission utilities, such as VELCO, are required to design, operate and maintain a transmission network according to national and regional reliability standards. Planning studies by VELCO and ISO New England, New England’s bulk electric system provider, reveal that Lyndonville area does not meet current federally mandated reliability requirements.
- 115 kV aluminum bus structure
- Four breakers 115 kV ring
- Five breaker 34.5 kV ring
- Two capacitor banks
- Modification to existing 115 kV transmission line and 34.5 kV sub-transmission line to connect to LED substation.
VELCO’s aesthetic consultant reviewed the preliminary design plans and performed a visual analysis of the areas of the proposed Project. The findings indicated that the Project site is appropriately located to limit views for a large extent of the surrounding geographical area. Potential public viewing locations will be primarily east of the substation. Projected impacts included intermittent views due to roadside vegetation and then commercial buildings and storage yards east of the armory. A full analysis of potential aesthetic impacts and proposed landscaping mitigation measures was included with the project petition.
VELCO’s noise consultant assessed the potential noise impacts associated with the substation. A complete engineering noise analysis was provided as part of the Project’s filing with the Public Service Board.
- Summer 2009
- Public Outreach
- Fall 2009
- Permitting and regulatory process
- Spring 2010
- Construction start
- Winter 2010
- Construction complete