Augusta to Winslow (Sections 1 and 40)

  

Image 1: CMP’s Section 1 34.5 kV transmission line from Vassalboro to Winslow, and Section 40 34.5 kV transmission line in Winslow.
Image 2: CMP’s Section 1 34.5 kV transmission line from Augusta to Vassalboro.

Project Overview

As part of our commitment to provide safe, reliable service to our customers, Central Maine Power Company (CMP) will be upgrading our electric transmission system in your community beginning late 2024 and continuing into 2025.

Section 1 is a 23 mile 34.5kV transmission line that runs from Augusta Eastside Substation on North Belfast Avenue off Route 3 to Winslow Substation near Benton Road, serving more than 7,700 customers. Built in 1929, the original transmission line needs replacement due to the age of poles, conductor, and crossarms; limited work clearances; and insulators that are prone to failure thus raising significant structural and reliability concerns.

Project Scope

The Section 1 Rebuild Project is comprised of two segments:

  • Segment 1: from Augusta East Substation to McCoy’s Substation in Vassalboro.
  • Segment 2: from McCoy’s Substation to Winslow Substation off Benton Ave.. In Winslow, a re route onto Section 40 is under consideration at the Maine Public Utilities Commission. See Re Route Review. The Section 1 line consists of wooden structures that will be upgraded to include 462 monopole (single) light duty weathered brown steel poles and 113 wooden poles that will be, on average, 10 feet taller. All new insulators, fiberglass crossarms, and conductor will be installed. The structures will be set on the existing line and the old ones will be removed.

Estimated Timetable

  • Construction Start: Q4 2024
  • Completion: Spring 2026

Benefit to Customers

  • Improved reliability to meet customers’ electricity needs.

For More Information

View the Augusta to Winslow Sections 1 and 40 project fact sheet.

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