By the Numbers
By the numbers.
Every figure on this page carries its source. We present MISO’s own numbers alongside its own market monitor’s — and let the record speak. Confident, specific, checkable.
The same two facts, drawn from the record.
Wisconsin electricity demand, 2005–2024
Total retail sales — flat to declining (−2.9% over the period).
Source · EIA Form EIA-861, 2005–2024Data table
| Year | WI total retail sales (GWh) |
|---|---|
| 2005 | 70,335.7 |
| 2006 | 69,820.7 |
| 2007 | 71,301.3 |
| 2008 | 70,121.8 |
| 2009 | 66,286.4 |
| 2010 | 68,752.4 |
| 2011 | 68,611.6 |
| 2012 | 68,820.1 |
| 2013 | 69,124.0 |
| 2014 | 69,494.8 |
| 2015 | 68,698.9 |
| 2016 | 69,736.3 |
| 2017 | 69,079.1 |
| 2018 | 70,959.5 |
| 2019 | 69,157.5 |
| 2020 | 67,448.4 |
| 2021 | 69,426.6 |
| 2022 | 69,875.9 |
| 2023 | 68,563.9 |
| 2024 | 68,291.4 (−2.9% vs 2005) |
Benefit per dollar spent
“Benefit” means the savings the line is supposed to produce for electricity customers — the justification for charging ratepayers to build it. MISO’s planning case claims $1.80–$3.50 back for every dollar spent; MISO’s own independent market monitor estimates under 40¢. Less than half a dollar back per dollar in is a loss for the people paying.
Source · MISO LRTP benefit metrics; Dr. David Patton, Potomac Economics (IMM)Three facts that shape whether these lines make sense for southern Wisconsin.
The growth isn’t here.
The corridors are not designed to deliver power to the communities they cross — and the data-center projects driving recent demand forecasts are separate proposals in separate proceedings.
Source · EIA-861; utility interconnection siting filingsRatepayers carry it.
The line is part of MISO’s Long-Range Transmission Plan, and its cost is allocated to Wisconsin ratepayers and others across the MISO Midwest region. The developers earn a regulated return on building it.
Source · MISO Long-Range Transmission Plan (Tranche 2.1) cost allocationThe case is contested.
MISO’s planning case projects $1.80–$3.50 of benefit per dollar. MISO’s own Independent Market Monitor puts it below forty cents. That gap is the heart of the proceeding.
Source · MISO LRTP benefit metrics; Potomac Economics (IMM)The line itself is a publicly planned MISO project, not a private or “merchant” venture — we don’t claim otherwise. We don’t claim the grid never needs investment. We claim something narrower and checkable: on the numbers as filed, the case for routing these lines across southern Wisconsin does not hold up, and Wisconsin ratepayers carry a cost whose benefit MISO’s own monitor disputes.
“Specific routes, structures, siting impacts, or localized effects cannot yet be answered.”— Transource Energy · letter of April 24, 2026