VELCO's Windsor Substation, operational since 1978, requires essential upgrades for enhanced reliability. A recent conditions assessment revealed deficiencies in the control building, transformer oil containment system, protection and control relays, and the substation fence. To address these issues, the project consists of the following components:
- Replacement and relocation of the existing control building with a larger control building that can accommodate a new protection and control system, redundant AC & DC station services, communication equipment, security systems, and new bathroom facilities.
- Replacement of the existing perimeter fence and expanding the north and east substation yard areas to accommodate the new control building and large vehicle access to the power transformer.
- Replacement of the existing 115 kV circuit switcher with an SF6 circuit breaker.
- Reconstruction and widening of the driveway to 20 feet with a turn around. Relocation of approximately 620 feet of driveway and entryway onto Hunt road.
- Improving site drainage.
- Limited tree clearing to accommodate the relocation of the driveway, new building location and fence expansion.
- Other in-kind maintenance work.
In addition, VELCO will need to install a temporary feed to Green Mountain Power's 46 kV system, which will be removed, and any disturbance restored at the end of the Project. The Project will also require VELCO to drill a well and install a wastewater system because there are no municipal water supply or wastewater connections available at the site.