# Michigan Act 30: how transmission routes are evaluated

## Act 30: choosing a power-line route

Imagine getting a letter about a new power line near your home. Who decides where it goes? And what happens if another route would affect fewer neighbors? Michigan's Act 30 sets the approval process for certain electric transmission lines. The Michigan Public Service Commission, usually called the MPSC, makes that state decision. We'll explain what the Commission must consider and why choosing a route involves more than drawing the shortest line on a map.

## From the power plant to your home

Power plants produce electricity. Transmission lines carry electricity over long distances. Smaller local wires bring it to homes and businesses. A new line may help prevent outages or move power where it is needed. But that need doesn't settle where the line should go. A route might cross farms, pass houses, or disturb wetlands. Regional planners can identify a need for more capacity. The Michigan approval process considers the qualifying line and its route. Environmental permits and permission to use private land can involve separate decisions.

## Which power lines does Act 30 cover?

Act 30's main definition covers certain new lines that are at least five miles long and operate at 345 kilovolts or more. Both requirements matter. Kilovolts describe the line's voltage; this is a high-voltage line carrying power across the grid. The law also has ownership requirements and exceptions. Some other lines can seek approval under a separate section. So a smaller project isn't automatically outside every state process. These rules tell us which approval process applies. They don't tell us which route is best.

## What must the Commission decide?

The Commission has several questions to answer. Do the public benefits justify building the line? Is the proposed route, or an alternative, feasible and reasonable? Does it create an unreasonable threat to health or safety? If approval includes conditions, the applicant must accept them. Some benefits can be measured, such as added capacity. Others are harder to put into one number. A project needs a supported answer to each legal question. Being useful to the grid doesn't automatically make every possible route acceptable.

## Can this route actually work?

Feasible means the route can actually work. Picture a line drawn beside a highway. It may look tidy, but crews still need room for towers, safe clearances, and access for construction and repairs. They also need permission to use the land. A difficult river crossing or unstable ground can change what is possible. Following an existing road and using the road's land are different things. The Commission needs a workable proposal, not just an appealing line on a map.

## A shorter route can have bigger impacts

Reasonable asks whether the choice makes sense when its benefits and burdens are considered together. Our example uses invented numbers to explain this. Route A is shorter, but passes more homes and crosses more wetland acres than Route B. Choosing the shorter route could reduce some construction costs while increasing effects on neighbors and water. Choosing the longer route could do the opposite. Act 30 doesn't say the cheapest route always wins. It requires a route that is feasible and reasonable, supported by the evidence.

## Water, wildlife, and land

Water and wildlife are part of that evidence. A route may cross streams, wetlands, forest, or protected land. The important question is what building the line would do there. A map can point to an area that needs closer study, but it may not show the full conditions on the ground. Two maps can also describe the same wet area in different ways. That shouldn't make it appear to be two separate places. Field checks and environmental review help explain the actual effect.

## Homes, farms, and important places

People and places matter too: homes, schools, farms, and places with cultural or historical importance. Counting nearby properties is a starting point. It doesn't describe everything a family may experience. A vacant lot and a home aren't the same thing. Distance alone doesn't explain construction disruption or changes to a landscape. The comparison should use the same counting rules for each route. If information is missing, that gap needs to be visible. No information about a place doesn't mean no one would be affected.

## What changes construction and cost?

Construction and cost can pull in another direction. A shorter route may need difficult crossings or more complicated towers. A longer route may follow an existing corridor and disturb less new land. But being close to an existing line doesn't prove there is space or permission for another one. Early cost estimates are also estimates, not a contractor's final price. Residents should be able to understand what makes one route more expensive and whether the comparison gives each alternative the same fair treatment.

## Why people prefer different routes

Why might two people prefer different routes after seeing the same facts? Because they care differently about the effects. One person may place more importance on keeping the line away from homes. Another may emphasize wetlands or what customers will pay. An analysis can combine these concerns into a score, but that score includes choices about what matters most. It isn't an answer handed down by the law. Our Oneida–Sabine work explored these questions. For residents, the useful lesson is to look beyond the final ranking and understand the reasons behind it.

## Is there a clearly better option?

A fair comparison can reveal a clearly weaker option. If one route is longer, passes more homes, and crosses more wetlands, why choose it over a route that does better on all three? There may be another reason, such as a construction constraint, but it needs explaining. Often there is no route that does best on everything. Then the decision involves a real trade-off. It helps to ask whether the preferred route changes when more importance is placed on homes, cost, or water. A changing answer shows which concerns drive the choice.

## Look at the whole route

The whole route matters. A map showing only the stretch beside one neighborhood can leave out effects somewhere else. A route may look better in that close-up and worse over its full length. Different comparisons may also include different sets of alternatives. That can change which option appears best. The public should be able to see what was compared and what was left out. A score or ranking doesn't predict whether the Commission will approve the project. The legal decision still depends on the full evidence.

## How residents can be heard

How can residents be heard? Act 30 requires public meetings before the application is filed. The company then submits its proposal and supporting information. A public comment lets someone explain a concern. Becoming a formal party, called intervention, gives a different role in presenting and questioning evidence. Affected owners and municipalities have rights under the Act, with procedures to follow. The Commission must approve or deny the application within one year after filing. Approval can override conflicting local restrictions, while land rights and payment for easements remain separate issues.

## What has changed, and what comes next?

Rules about applications can change, too. As of October 7, 2026, the Commission had voluntary filing guidelines and was considering binding rules in case U-22064. A hearing and comment deadline were scheduled for October 21. Proposed rules weren't already in force. Highway access was a separate question, and House Bill 5940 was still pending. For a project near you, the useful starting points are its route map, the company's reasons, alternatives, and the latest case schedule. The question is whether the proposed choice is supported and its effects on people and places have been considered fairly.