Capital Program Planning for Minnesota Gas Utilities

by | Oct 21, 2026

Minnesota · Natural Gas Utilities

Minnesota's gas utilities are replacing pipe, decarbonizing, and absorbing price shocks — all on one capital plan.

A cold-climate system that heats most of the state is being asked to modernize 34,000-plus miles of main, stand up renewable-gas and geothermal pilots under the Natural Gas Innovation Act, and never repeat the $662 million shock of Winter Storm Uri — while regulators press on affordability. Each of those forces reshuffles the projects on your list. Invizion helps gas utilities re-sequence a capital portfolio in a click — and defend every decision.

See how Invizion helps utilities See what Minnesota utilities face Download the briefing (PDF)
The bottom line: Minnesota's gas utilities have to replace 34,000-plus miles of aging main, fund Innovation Act pilots, and guard against another $662 million Uri shock — all on one bill customers already feel. The ones that stay defensible are those whose capital plans can re-sequence as fast as the mandates and markets change.
~920,0001
CenterPoint Energy's Minnesota gas customers — the state's largest natural gas utility.
$662M2
Extraordinary gas costs Minnesota utilities incurred in the five-day February 2021 cold snap (Winter Storm Uri).
34,483 mi3
Natural gas mains crisscrossing Minnesota — enough to circle the earth nearly one and a half times.
63%+4
Share of Minnesota homes and buildings that depend on natural gas for heat, cooking, and hot water.

The Minnesota Landscape

Four forces are moving your project list at once

None of these is theoretical, and none waits for your next budget cycle. Together they mean the capital plan you approved last year may already be the wrong plan.

System Integrity & Aging Pipe

Cast iron is gone — the replacement clock keeps running

Minnesota is one of roughly two dozen states that have eliminated all cast- and wrought-iron gas main,5 but that milestone doesn't end the work: 34,483 miles of main still carry legacy unprotected steel and vintage pipe that have to be surveyed, upgraded, and replaced on a safety clock.3

CenterPoint alone has poured close to $2 billion into accelerated system replacement over the past decade and expects at least $1 billion more, with distribution work making up nearly 90% of its 2022 capital spend.63 Minnesota's Gas Utility Infrastructure Cost rider lets utilities recover much of that between rate cases — but only for prudently incurred, compliance-driven work.7

Decarbonization & Electrification

The Innovation Act reshapes what a gas dollar buys

The 2021 Natural Gas Innovation Act lets Minnesota LDCs invest ratepayer money in renewable natural gas, hydrogen, networked geothermal, carbon capture, and strategic electrification — capped at the lesser of 1.75% of Minnesota gas revenue or $20 per customer for a first plan.8

CenterPoint's approved plan funds an $11.6 million networked-geothermal pilot and a $4.6 million hydrogen plant in Mankato; Xcel has proposed a $58 million, five-year plan weighted toward RNG and geothermal.1 With 63%-plus of buildings still on gas4 and state goals pointing toward net-zero by 2050,3 every long-horizon plan now carries declining-throughput and stranded-asset risk.

Supply, Price & Reliability

One cold week can rewrite a decade of budgets

During Winter Storm Uri, Minnesota gas utilities ran up $662 million in extraordinary costs as spot prices spiked as much as 350% above prior record highs; the Department of Commerce urged disallowing $178.6 million tied to utilities' missteps, and the Attorney General argued $71–92 million could have been hedged away.2

Minnesota's cold-climate, design-day peaking system delivered roughly 481 billion cubic feet in 2024,10 and residential customers paid about $10.65 per thousand cubic feet — so supply, storage, and peaking capacity are core capital-planning questions, not afterthoughts.9

Capital Recovery & Regulation

Every dollar has to survive an affordability test

Rates are the pressure point. CenterPoint's residential base rates have roughly doubled since 2008, and its last rate case closed with a unanimous 2022 settlement at the Public Utilities Commission — approvals are negotiated, not automatic.6

The Gas Utility Infrastructure Cost rider speeds recovery of mandated replacement work but sunsets June 30, 2028,7 and Innovation Act spending sits under its own statutory caps.8 With bills already stretched by Uri, every project has to be defensible on cost.

Who Delivers Minnesota's Gas

A few large investor-owned LDCs and a set of municipal systems

Minnesota's gas is carried mostly by investor-owned utilities the PUC rate-regulates, alongside municipal systems that answer to their own city boards. The pressures are shared; the accountability path differs.

Investor-owned gas LDCs

Rates & capital recovery regulated by the Minnesota PUC

CenterPoint Energy ~920,000 MN customers · largest gas LDC1 · part of a ~7M-customer, four-state gas business11
Xcel Energy (gas) Minnesota's 2nd-largest gas utility3
Minnesota Energy Resources (MERC) 3rd-largest; serves outstate communities3
Great Plains Natural Gas 4th-largest; western & southern Minnesota3
Greater Minnesota Gas (GMG) 5th-largest; rural & exurban systems3

Together, Minnesota's gas utilities serve roughly 1.66 million residential gas consumers statewide.12

Municipal gas systems

Governed by city boards, not PUC rates

Austin Utilities Municipal electric, water & natural gas · Austin, MN13
Hutchinson Utilities Commission Municipal natural gas & electric · Hutchinson, MN14
Other municipal gas systems Represented by the Minnesota Municipal Utilities Association15

Municipal systems own roughly 10% of Minnesota's gas mains; the rest is investor-owned.3

Rate-Setting & Oversight

Every capital dollar has to be defensible

Whether recovery runs through a rate case, an infrastructure rider, or an Innovation Act plan, the question is the same: why this project, why now, why at this cost?

  • Minnesota Public Utilities Commission (PUC) sets rates, approves capital recovery, and reviews infrastructure and innovation plans for the state's investor-owned gas LDCs.78
  • Gas Utility Infrastructure Cost (GUIC) rider — Minn. Stat. 216B.1635 allows automatic annual recovery of mandated pipe replacement and public-project relocations between rate cases; the mechanism sunsets June 30, 2028.7
  • CenterPoint's 2022 rate case closed with a unanimous PUC-approved settlement, after a decade in which residential base rates roughly doubled — a marker of how hard affordability now bites.6
  • Natural Gas Innovation Act — Minn. Stat. 216B.2427 caps first-plan spending at the lesser of 1.75% of Minnesota gas revenue or $20 per customer, with higher caps only after proven cost-effectiveness.8
  • Winter Storm Uri prudence review put utility gas-purchasing decisions on trial: the Department of Commerce recommended disallowing $178.6 million of the $662 million incurred.2

Where The Capital Goes

Real programs, real dollars — can your plan absorb them?

Most Minnesota gas capital is recovered through rates and riders rather than federal grants, which makes prioritization and defensibility everything. These are the dollars already in motion.

  • ~$2B accelerated system replacement at CenterPoint over the past decade, with at least $1 billion more expected and distribution work near 90% of 2022 capital.63
  • CenterPoint Innovation Act plan — an $11.6 million networked-geothermal pilot plus a $4.6 million hydrogen plant in Mankato, approved in 2024.1
  • Xcel Innovation Act plan — a proposed $58 million over 2025–2029, roughly $27M RNG, $10M geothermal, $7.9M hydrogen, $5.7M carbon capture, $2.7M electrification.1
  • GUIC infrastructure rider is the primary vehicle for recovering mandated replacement between rate cases — and it expires in 2028, raising the stakes on what gets filed and when.7
  • $662 million in Uri gas costs is still being recovered from ratepayers over time — a reminder that supply shocks compete directly with planned capital for room on the bill.2

Where Invizion Fits

Turn Minnesota's gas-system decisions into a defensible capital plan

Invizion is scenario-based capital portfolio optimization built for utilities. When a replacement mandate accelerates, throughput forecasts shift, or a decarbonization ruling lands, you don't re-plan by hand for weeks — you model it and decide with a record to stand behind.

1

Model the “what-if” before it's forced on you

A faster main-replacement schedule, a gas-line-extension ban, an RNG mandate — build the scenario and see the impact on the whole portfolio, side by side with today's plan.

2

Re-sequence 500 projects in a click

When priorities move, Invizion re-orders the portfolio automatically — accelerating, stretching, or deferring projects against the constraints you set, not weeks of spreadsheet surgery.

3

Give regulators or your board a defensible record

Every prioritization and trade-off is captured. When you're asked “why this project, why now,” the answer is documented — not reconstructed after the fact.

Minnesota Gas, In Brief

Questions Minnesota gas utility leaders are asking

Short, sourced answers — the same facts we dig into with utilities looking at their capital programs.

Who are Minnesota's largest natural gas utilities?
CenterPoint Energy is the largest, serving roughly 920,000 Minnesota customers, followed by Xcel Energy, Minnesota Energy Resources (MERC), Great Plains Natural Gas, and Greater Minnesota Gas — plus municipal systems such as Austin Utilities and Hutchinson.13
What is the Natural Gas Innovation Act?
A 2021 Minnesota law that lets gas utilities invest in renewable natural gas, hydrogen, networked geothermal, carbon capture, and electrification, capped at the lesser of 1.75% of Minnesota gas revenue or $20 per customer for a first plan. CenterPoint's plan is approved and Xcel has a $58 million plan pending.81
What happened with Winter Storm Uri gas costs in Minnesota?
The five-day February 2021 cold snap left Minnesota gas utilities with $662 million in extraordinary costs as spot prices spiked up to 350% above prior records; the Department of Commerce recommended disallowing $178.6 million tied to utilities' missteps.2
How do Minnesota gas utilities recover infrastructure investment?
Mainly through PUC rate cases and the Gas Utility Infrastructure Cost (GUIC) rider, which allows automatic annual recovery of mandated pipe replacement between rate cases — though that rider sunsets in 2028.76
Is Minnesota phasing out natural gas?
Not near-term — more than 63% of homes and buildings still rely on gas. But state goals point toward net-zero by 2050, and the Innovation Act is nudging utilities toward lower-carbon fuels and electrification, which reshapes long-horizon capital plans.438
How does Invizion help Minnesota gas utilities plan capital?
Invizion is scenario-based capital portfolio optimization for utilities. It lets you model how a main-replacement mandate, an Innovation Act plan, a supply shock like Uri, or a GUIC-rider deadline reshuffles your whole project list, re-sequence the portfolio automatically, and keep a defensible record of every decision for the PUC and your customers.

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About the Author

GB

Guy Barlow

President, Invizion

Guy Barlow leads Invizion, a capital lifecycle management platform for water and wastewater utilities. He has spent two decades at the intersection of utility capital programs, funding, and analytics, helping utilities make faster, more defensible capital decisions.

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Invizion helps utilities model, optimize, and defend their capital programs. Explore how it works, or read our latest thinking on capital planning across the utility sector.

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This briefing was last reviewed September 2026.

Sources

  1. Fresh Energy — "Decarbonizing the natural gas system: Minnesota has more progress to make," Nov. 2024 (CenterPoint ~920,000 customers; CenterPoint & Xcel NGIA plans). fresh-energy.org
  2. Energy and Policy Institute — Minnesota Winter Storm Uri cost recovery ($662M total; $178.6M Commerce disallowance; $71–92M AG estimate; 350% price spike), 2022. energyandpolicy.org
  3. Fresh Energy — "Understanding the gas system," Nov. 2023 (34,483 miles of main; 90% investor-owned; five largest LDCs; CenterPoint $415M 2022 capex; net-zero-by-2050 goals). fresh-energy.org
  4. Fresh Energy — "What's next for fossil gas in Minnesota?" July 2021 (more than 63% of homes and buildings depend on fossil gas). fresh-energy.org
  5. PHMSA — Cast and Wrought Iron Pipeline Inventory (Minnesota among states that have eliminated all cast/wrought iron gas distribution main). phmsa.dot.gov
  6. Fresh Energy — "CenterPoint rate case is an opportunity to modernize Minnesota's gas policies," Aug. 2022 (~$2B accelerated replacement, $1B+ more, base rates roughly doubled since 2008, unanimous PUC settlement). fresh-energy.org
  7. Minnesota Statutes 216B.1635 — Gas Utility Infrastructure Cost (GUIC) rider; automatic annual recovery of mandated replacement; expires June 30, 2028. revisor.mn.gov
  8. Minnesota Statutes 216B.2427 — Natural Gas Innovation Act (eligible resources; first-plan cost cap of the lesser of 1.75% of Minnesota gas revenue or $20 per customer). revisor.mn.gov
  9. U.S. EIA — Minnesota Natural Gas Prices (residential ~$10.65/Mcf, citygate ~$4.52/Mcf, 2024). eia.gov
  10. U.S. EIA — Minnesota Natural Gas Consumption / Deliveries (about 480,670 MMcf delivered to consumers in 2024). eia.gov
  11. CenterPoint Energy — Company overview (~7 million natural gas customers across Indiana, Minnesota, Ohio, and Texas). centerpointenergy.com
  12. U.S. EIA — Minnesota Number of Natural Gas Consumers (about 1.66 million residential consumers, 2024). eia.gov
  13. Austin Utilities — municipal electric, water, and natural gas utility, Austin, MN. austinutilities.com
  14. Hutchinson Utilities Commission — municipal natural gas and electric utility, Hutchinson, MN. hutchinsonutilities.com
  15. Minnesota Municipal Utilities Association (MMUA) — represents Minnesota's municipal electric, gas, and water utilities. mmua.org