What is the Second Interconnection?
The Second Interconnection Project is the construction of a 69kV transmission line from a MISO connected substation on CR 480 to one of MBLP’s substations in South Marquette (site of the former Shiras Steam Plant)
Why do we need to construct the Second Interconnection?
The Second Interconnection will serve as an additional connection to the greater transmission grid. This connection provides the MBLP & its customers enhanced reliability & resiliency by ensuring we have multiple avenues to keep the lights on for our customers.
How was the route for the Second Interconnection Determined?
The route of the Second Interconnection was planned based the most direct and least impactful route. Most of the route already has smaller MBLP distribution lines already in place, these lines will be transferred to the larger Transmission poles and a majority of the smaller poles will be removed.
This timeline will be updated as the project moves forward.
1980 – 2018
Discussion about a Second Interconnection, often referred to as “The Loop” prior to the project starting to take shape.
2020-2022
Second Interconnection Engineering & Design
04/28/2022
Second Interconnection Substation Transformer Purchase Approved & Ordered
09/26/2023
Substation Transformer Arrives
The new substation transformer for the second interconnection has arrived.
06/25/2024
Metal Poles are Approved & Ordered
09/24/2024
Wood Poles are Approved & Ordered
01/28/2025
Substation Construction Contract Awarded
MJ Electric was awarded the contract for construction of the Second Interconnection substation.
02/13/2025
Transmission Line Construction Contract is Awarded
Hooper Corporation is awarded the contract for the Second Interconnection line construction.
04/2025 to 06/2025
Equipment/Components arrive at the Lay-down Yard
Equipment for the Second Interconnection is being staged on CR 480 in preparation for construction on the line.
06/20/2025
First Poles are in the ground
07/11/2025
Work continues along CR 480
8/12/2025