323 ACR
About the Project
The 302 and 323 transmission lines, both 345,000 kilovolts, were first built in 1968 to connect the Carpenter Hill and Medway substations. Part of this line is now called the 323 line. The section owned by National Grid runs about 14.4 miles, from the Millbury #3 substation to the Milford/Medway town line.
Today, the 323 line includes 153 wooden poles and 14 steel poles. The steel poles show signs of aging, including light rust and wear near their bases. The wooden poles are in worse condition and have problems such as rot, cracking, bending, and damage from woodpeckers. Almost every wooden pole has some level of damage.
This project will upgrade the transmission line by replacing all existing wooden poles with new steel poles designed to last longer. Crews will also install new fiber-optic ground wires and replace insulators and other equipment. These improvements will help make the electric system safer, more reliable, and better prepared for the future.
Project Benefits
This project improves the transmission line by replacing worn out wooden poles and an aging shield wire. The upgrades will help provide safe and dependable electric service to customers and strengthen the local transmission system. The improvements will also extend the life of the line, helping it serve the community for many years to come.
- Early - Engineering Begins
- Early Summer - Soil Borings Begins
- Late Summer - Soil Borings Complete
- Dec - Construction Start Begins
- Late - Engineering Complete
- TBD - Construction Start Complete
Phases of Construction
-
What to Expect
Electric Transmission improvements take place in several phases. The descriptions below show common construction steps, but the exact process and materials may vary.
-
Site Preparation
The first step is clearing trees and brush. This work allows construction crews to safely build access roads and remove trees that could fall onto the power lines.
-
Environmental Controls
Next, steps are taken to protect the area during construction. These may include mats, silt fences, and containers for construction materials.
-
Transmission Line Rebuilding
Crews use heavy equipment, including cranes. New foundations and structures are installed, along with fiber-optic cables and new wires. Lastly, old structures are removed, and the lines are powered.
-
Restoration
After construction, crews restore the work area and return the ground as close as possible to its original condition, unless otherwise specified by regulatory requirements or agreement with a landowner.
Contact Us
About the Project
The 302 and 323 transmission lines, both 345,000 kilovolts, were first built in 1968 to connect the Carpenter Hill and Medway substations. Part of this line is now called the 323 line. The section owned by National Grid runs about 14.4 miles, from the Millbury #3 substation to the Milford/Medway town line.
Today, the 323 line includes 153 wooden poles and 14 steel poles. The steel poles show signs of aging, including light rust and wear near their bases. The wooden poles are in worse condition and have problems such as rot, cracking, bending, and damage from woodpeckers. Almost every wooden pole has some level of damage.
This project will upgrade the transmission line by replacing all existing wooden poles with new steel poles designed to last longer. Crews will also install new fiber-optic ground wires and replace insulators and other equipment. These improvements will help make the electric system safer, more reliable, and better prepared for the future.
Project Benefits
This project improves the transmission line by replacing worn out wooden poles and an aging shield wire. The upgrades will help provide safe and dependable electric service to customers and strengthen the local transmission system. The improvements will also extend the life of the line, helping it serve the community for many years to come.
Timeline
Phases of Construction
-
What to Expect
Electric Transmission improvements take place in several phases. The descriptions below show common construction steps, but the exact process and materials may vary.
-
Site Preparation
The first step is clearing trees and brush. This work allows construction crews to safely build access roads and remove trees that could fall onto the power lines.
-
Environmental Controls
Next, steps are taken to protect the area during construction. These may include mats, silt fences, and containers for construction materials.
-
Transmission Line Rebuilding
Crews use heavy equipment, including cranes. New foundations and structures are installed, along with fiber-optic cables and new wires. Lastly, old structures are removed, and the lines are powered.
-
Restoration
After construction, crews restore the work area and return the ground as close as possible to its original condition, unless otherwise specified by regulatory requirements or agreement with a landowner.