New Transmission Line Construction Project

Project Overview

The Hoosier Energy Wilbur to DEI (Duke Energy Indiana) Centerton 69kV reliability project includes constructing 5.8 miles of new 69kV overhead transmission line. The line will connect the Hoosier Energy Wilbur substation to the Duke Energy Centerton substation, both in Morgan County.

The project is critical to improve the reliability of the transmission grid – the backbone of the electric system – by adding another power source to feed the area. The improvements will lessen the frequency and duration of power outages to SCI REMC members who receive power around Wilbur, Monrovia and Mooresville areas from Hoosier Energy supply. The new line will also support future load growth in the area.


Open House: June 2023
Pre-construction Activities (survey, real estate, design, permitting, materials, etc.): Summer 2023 -2024
Construction (vegetation, access, foundations, line construction): Late 2024-2025
Restoration: 2025

Project Routing Analysis

An area was defined for the study of prospective solutions for the project between Wilbur Substation and Duke Energy’s Centerton Substation. Four potential routes were identified and studied.

The four routes were studied for constraints and opportunities based on environmental, social, and engineering factors using available data, layers, and aerial photography. The collected data was input into the weighted scoring matrix. The lowest total represents the best scored route for the new line, shown in the map above.

Project Design

The new 69-kilovolt (kV) line will be supported by steel or ductile iron poles. Final design will determine height, but the structures will typically range from 70 to 100 feet above ground.

Hoosier Energy Overview

Founded in 1949, Hoosier Energy is a generation and transmission cooperative (G&T) with headquarters in Bloomington, Indiana.

The G&T provides electric power and services to 18 member distribution cooperatives in central and southern Indiana and southeastern Illinois. We are a community-focused organization that works to efficiently deliver affordable, reliable and safe energy.

Hoosier Energy & South Central Indiana REMC

South Central Indiana (SCI) REMC is one of 18 electric cooperatives that own, govern, and purchase wholesale power from Hoosier Energy. SCI REMC was established in 1939 and is the largest rural electric cooperative in Indiana. Electric cooperatives were organized by people living in rural areas who banded together to supply electricity to their own homes, where investor-owned utilities refused to go (and still do). SCI REMC is owned and operated by the 28,200 members it serves across seven counties.

Frequently Asked Questions

Electricity is part of our everyday lives and a product we rely on with an expectation of uninterrupted service. The existing electric delivery infrastructure has been in place for quite some time and is approaching an age where it must be updated and rebuilt. Adding assets such as this new line ensures reliability and resiliency, along with accommodations for future technologies.

More than 3,400 members in the areas of Wilbur, Monrovia, Mooresville, and Beech Grove are served by a single 10-mile transmission line, which feeds the Wilbur Substation. The new line from the Duke Energy Centerton Substation to Wilbur Substation will add a second supply to improve reliability to the system and help reduce outages. The new line also supports future load growth in the area and adds capacity to the system.

Considerable improvements in outage duration and frequency are expected, with Hoosier Energy being able to quickly isolate storm outages and restore customer service.

The new line will allow Hoosier Energy to better maintain the existing system, while also supporting future transmission projects.

An area for the study of prospective solutions was defined, and four potential routes were identified.

The routes were studied for constraints and opportunities based on environmental, social and engineering factors using available data, layers and aerial photography. The collected data was entered into the weighted scoring matrix, with the lowest total representing the best scored route for the new line. Route 4 had the lowest score.

Hoosier Energy will host two open houses in June 2023. Preconstruction activities will take place thereafter including surveying, real estate, engineering, permitting and ordering materials. We project construction will take place in late 2024 and continue into 2025. This includes vegetation management, constructing access to the line, foundation and line construction, and restoration.

Hoosier Energy employees and approved contractors and consultants will be on-site. They will be easily identifiable by their logos and materials. You will be contacted if your property is part of the project.

Hoosier Energy Real Estate specialists, employees or their consultants and contractors, will be reaching out to landowners should an easement be necessary on your property.

An easement is a legal agreement that gives utilities the right to use (not own) specific portions of land for certain purposes. Easements are recorded on the property deed and remain in effect after properties are sold or transferred to a new owner.

Easement area widths for this project are expected to be 100 feet, however roadside areas could be less.

Hoosier Energy will need to trim or remove trees and vegetation to prevent contact or interference with line operations. This will allow access for ongoing maintenance and outage restoration as well as provide a visual opening for regular aerial patrols. Vegetation specialists will be reaching out to landowners as needed.

The new poles are constructed of steel or ductile iron and will be “H” frame or single poles. Height of the poles will be determined with final design, but they are typically 70 to 100 feet above ground. Final design will also determine if foundations are needed, particularly at highway and river crossings. Steel and ductile poles are found to be more reliable than their wood counterparts and typically require less maintenance.

Electromagnetic fields (EMF) with transmission lines are low frequency and have not been found to be linked to adverse health conditions.

Although environmental factors were thoroughly considered during the routing analysis, Hoosier Energy will continue to survey and investigate during various stages of the project to minimize impacts, comply with regulations, and protect the environment throughout construction and long-term operations and maintenance. Hoosier Energy will ensure any disturbance is minimized, stabilized and restored throughout the construction process.

Typical work hours will be during daylight but will also be weather dependent. Foundations and stringing conductor may require additional hours. Crews will access the structures multiple times throughout construction.

Hoosier Energy and their contractors will work with property owners to ensure safe access to their property. Hoosier Energy construction representatives will be available to discuss. Traffic control companies will be utilized as needed for safe roadway access.

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