Staff Directory 11331478

Walker Orenstein

Reporter | Energy, natural resources and sustainability
Phone: 612-673-4246

Walker Orenstein covers energy, natural resources and sustainability for the Star Tribune. Before that, he was a reporter at MinnPost and at news outlets in Washington state.


Walker Orenstein covers energy, natural resources and sustainability for the Star Tribune. Orenstein previously covered state government and politics with a focus on greater Minnesota and environmental issues for MinnPost, and he reported on the Legislature in Washington state for The News Tribune of Tacoma. He was raised in St. Paul and attended the University of Washington in Seattle. In his spare time, Orenstein enjoys playing hockey, hiking and camping..
Recent content from Walker Orenstein
An industrial shredder turns tree scraps into biomass fuel for District Energy in St. Paul. The 12-acre wood yard near Pig’s Eye Lake is one of the

Minnesota wants to be carbon-free by 2040, but it still hasn't decided what that means

The Public Utilities Commission must decide what counts as carbon-free as utilities move to a clean grid.
Crews work to construct a solar facility near the Sherburne County Generating Station, also known as Sherco, a large coal-fired power plant on Dec. 8

PUC approves Xcel plan to replace retiring Minnesota coal plant with mega solar farm

Utility regulators on Thursday granted a key permit for the third large Xcel solar project in Becker, the last in a trio that together will be one of the country's largest farms. The power will help replace the outgoing Sherco coal plant.
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A million gallons of coal ash wastewater spills at Minnesota Power coal plant

The Duluth-based electric utility said an unknown amount of polluted water had reached a nearby lake after a pipe leaked.
Bicyclists, walkers, and rollerbladers travel across the newer part of the Coon Rapids Dam, which was rebuilt in 1997.

Minnesota dams mostly held up in June flooding, but old structures need repair

The Rapidan Dam near Mankato drew a national spotlight to what is a common problem in the state: old and creaky dams that are costly to fix, replace or remove.
Allete CEO Bethany Owen speaks at a panel in Minneapolis in June. The Duluth-based energy company spent more than a year looking for a buyer before an

Minnesota Power parent company explored sale starting in 2022 ahead of $6.2 billion deal

That revelation and others — like how the company CEO would cash in on the sale — came as part of disclosures ahead of an August stockholder vote to take Allete private.
The west bank of the river at the Rapidan Dam near Mankato, photographed Tuesday, has seen major erosion from recent flooding.

Bridge next to Rapidan Dam at risk of failure a week after major flooding

Blue Earth County attempted an emergency operation to stabilize the bridge last week.
Xcel Energy logo

Xcel agrees to smaller Minnesota gas rate hike in deal for 7.5% increase

A settlement with state officials and others would result in an extra $4.20 per month on the bills of residential customers if utility regulators approve. The money would partly pay for maintenance and upgrades to Xcel's gas distribution and transmission infrastructure.
Lineman Bobby Weber uses binoculars to inspect a high power line pole in Inver Grove Heights in April. Utilities including Xcel Energy are managing a

Xcel seeks $1.9 billion from Colorado customers to fund wildfire mitigation after 2021 blaze

The Minneapolis-based company is facing an onslaught of lawsuits from two destructive fires in Colorado and Texas. The plan would raise residential bills in Colorado by 9.56% but would not affect Minnesota rates.
Mankato house plummets into river after dam collapse

House collapses into river near Rapidan Dam in southern Minn.

Blue Earth County authorities "monitoring for downstream impacts" after house falls into water.
People gather to watch the Rapidan Dam on Monday, June 24, 2024 near Mankato. Water in the river significantly cut around the west side of the dam, wh

The Rapidan Dam near Mankato will likely survive this flood. But what about the next?

Destructive flooding in 2019 and 2020 had previously left the 114-year-old hydroelectric plant inoperable and county officials grappling with the choice of spending at least $15 million to repair it — with little hope of making enough money from selling power — or shelling out $82 million to remove it.
Quick-flowing water erodes the earth around the Rapidan Dam near Mankato on Monday.

Dam near Mankato in danger of 'imminent failure'

Flooding has washed out a portion of the Rapidan Dam on the Blue Earth River, as the water continues to rise.
Todd Gillette, a field training manager at TelCom Construction, operates a horizontal drill during a demonstration at a TelCom Construction field trai

Minnesota unions won new labor rules for broadband. Will it slow $652 million for rural access?

A volatile rift over proposed wage and safety rules as unions pushed for higher standards made the telecom industry warn Minnesota would lose out on once-in-a-generation funding for fast internet in rural areas. What passed has raised its own debate.
Google is one of the sponsors at the Mid-America Regulatory Conference (MARC) for state utility regulators in Minneapolis on June 10 at the Renaissanc

Utility regulators hosted annual conference in Minneapolis with money from entities they oversee

The Mid-America Regulatory Conference raises questions about the ethics of soliciting money from companies and interest groups the Minnesota Public Utilities Commission regulates.
A rendering of the Solugen "Bioforge" slated to open in Marshall, Minn., in 2025.

Corn-sugar chemical plant in Minnesota lands $213 million federal loan

Texas-based Solugen aims to build a large manufacturing plant in Marshall, Minn., for turning corn sugar into chemicals usually made from petroleum.
FERC Commissioner Allison Clements and Allete CEO Bethany Owen take part in a panel at the Mid-America Regulatory Conference in Minneapolis on Monday.

With 'outdated' electric grid, major new rule with Midwest ties could boost renewables

In Minneapolis, FERC Commissioner Allison Clements promoted a significant new federal rule that could be a part of a needed grid overhaul.
Casks of spent fuel rods at Prairie Island nuclear power plant, pictured in 2017.

Customers or shareholders: Xcel, state divided on who should pay for Prairie Island outage

The nuclear plant was down for more than 100 days starting in October after workers accidentally cut underground cables, and the cost to buy replacement energy on the open market in 2023 was more than $23 million.
Mike Bakk, Keetac’s director of operational readiness, explains the concentration process at U.S. Steel's Keetac mining operation in Keewatin, Minn.

As U.S. Steel opens new Iron Range taconite facility, its potential foreign sale looms

Japan's Nippon Steel plans to acquire the company pending regulatory approval, but the transaction, announced in December 2023, has drawn national security and supply chain concerns.
Xcel Energy line inspectors have access to an extreme ATV like a Sherp to access power lines in remote areas, here in Inver Grove Heights on April 24.

Embroiled in lawsuits from wildfires, Xcel faces tradeoffs of safety vs. cost

Xcel's equipment has allegedly been a source for blazes in Colorado and Texas, but the public utility is one of many grappling with tough questions of how to prevent such disasters.
Center for Energy and Environment HVAC consultant Taylor Smith sets a programmable thermostat on Oct. 13, 2022, in Minneapolis.

Minnesotans find Xcel's dynamic pricing plan too aggressive, not worth energy savings

"Time-of-use" electric rates — like a surcharge during busy hours for rideshares — is becoming more common in the U.S., but consumers, state officials and nonprofit advocates don't feel the two-year pilot program proved the rates work.
Workers from TruNorth Solar install a rooftop solar panel power system on April 4 in Golden Valley.

DFL resolves division on permitting and community solar credits in energy legislation

Despite late-session negotiations, energy legislation passed without any major upheaval.
Jonathan Bram, left, of Global Infrastructure Partners, and Palak Trivedi of Canadian Pension Plan chat with Allete CEO Bethany Owen after the Minneso

World's largest asset manager behind Duluth energy company Allete's $6.2B sale

BlackRock is buying Global Infrastructure Partners, which would be the majority owner of Allete if regulators approve the deal. That has raised some eyebrows among consumer advocates.
Bits of snow cover solar panels on Burns Valley Road Thursday, Jan. 18, 2024 in La Crescent, Minn.

At last minute, House DFLers quietly push to overturn major ruling on community solar

The effort brings up an acrimonious debate over the costs and benefits of community solar, and could threaten legislation meant to cut red tape for clean energy development.
Allete CEO Bethany Owen during the Public Utilities Commission meeting in St. Paul on Thursday.

PUC wants buyers of Duluth energy company Allete to clarify local workforce commitment

Global Infrastructure Partners and the Canada Pension Plan Investment Board appeared before the Public Utilities Commission on Thursday to discuss their $6.2 billion deal.
Drone system engineer and developer Mikkel Tiller, center, and pilot Warren Grange, both with Heimdall Power, discuss their flight to install an orb o

Balls, orbs or neurons: The pioneering tech helping Great River Energy manage transmission lines

A small sphere Norway's Heimdall Power created aims to free up space and reduce congestion, potentially eliminating the need for new infrastructure.
Allete President and CEO Bethany M. Owen posed for a portrait in the board room in the ALLEETE headquarters in 2020. She will remain at the helm of th

Duluth electric utility owner Allete to go private after $6.2 billion sale

A Canadian pension board and an investment fund partnered to buy the company, which will keep its headquarters in Minnesota.
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Minnesota Power agrees to smaller bill increase for customers in settlement

If utility regulators approve the deal with state officials, residential customers' electric rates would increase 4.9% instead of the originally posed 12%.
Sen. Nick Frentz, DFL-North Mankato, speaks on the Senate floor in the State Capitol where he has sponsored a bill to streamline the permit process fo

Minnesota DFL wants faster clean energy permits, but some are wary of shortcutting public input

Lawmakers promise an effort to cut red tape for clean power won't result in meaningfully less oversight or public involvement.
Ranch lands the Smokehouse Creek fire scorched in Canadian, Texas, pictured March 1, 2024. Xcel Energy could face hundreds of millions of dollars of c

Xcel profits after job cuts, but Texas wildfire costs could be 'adverse'

The Minneapolis-based utility says it wasn't negligent in maintaining a wooden utility pole that was a source of the Smokehouse Creek Fire, but if it's found liable, costs could exceed $500 million in insurance coverage.
Xcel Energy has proposed a two-year test of automatic bill credits for Minnesota customers in certain low-income areas.

Xcel's proposed automatic bill credit could save low-income households in Minnesota $450 a year

The company would enroll people in certain census areas based on income metrics and energy bills to help make energy costs just 4% of the household's income.
Workers from TruNorth Solar install a rooftop solar panel power system on the roof of Sheila and Richard Miller’s house in Golden Valley.

How to solar power your home to lower your carbon footprint

There are more options for boosting solar power at home than you might think, including installing rooftop solar, subscribing to a community garden or simply paying extra to your utility.
Stacks from three large steam turbine-generators, along with massive mounds of coal, can be seen from the roof of the Sherburne County Generating Stat

Xcel drops rate fight, which will keep Minnesota utility bills cheaper

It also abruptly ended a long-running and unusually bitter split between the company and Public Utilities Commission about the "return on equity" rate.
A crew lays down fiber-optic cable in Carver County, Minn., in 2022.

Minnesota House drops 'franchise fees' on internet providers that would have hiked bills

Supporters said the policy would improve broadband access and help fund government access programming, but telecom groups lobbied against the plan.
Prairie Island Nuclear Power Plant pictured in 2017.

Cause of Xcel's Prairie Island nuclear outage: Workers drilled through cables

Xcel Energy initially pinpointed the cause of a lengthy outage at its Prairie Island nuclear power plant as an equipment issue.
Water filtration and oxygen handler systems that works in concert with an electrolzyer pictured at a CenterPoint gas facility to create hydrogen Thurs

Xcel, UND say Midwest hydrogen 'hub' at risk from tax credit rules

A $1 billion federal grant could be in limbo in part because of limits on when companies can receive a hydrogen production tax credit for using nuclear and wind to create hydrogen.
Pulsar CEO Thomas Abraham-James stands in front of the company's Jetstream  #1 helium exploration facility in Babbitt on the Iron Range.

Legislators scramble to create tax, environmental plan for Minnesota's first helium operation

State and local officials fear Canadian-based Pulsar could move ahead with its northeastern Minnesota project and use gas from under state land without paying royalties.
Workers hung up a sign advertising Toyota’s line of electric vehicles during setup for the 2024 Twin Cities Auto Show at the Minneapolis Convention

Minnesota EV sales rose last year, widespread adoption still far off

While electric vehicles will be a talking point at the Twin Cities Auto Show, the segment has a long way to go.
A crew lays down fiber-optic cable last year as part of the “Connect Up Carver” initiative bringing broadband internet to rural areas in Carver Co

Some Minnesota cities want to impose fees on internet providers; customers could pay the price

Those fees would go toward improving rural broadband connectivity, increasing access to government media and offering consumer protections.
Gregg Mast, executive director of Clean Energy Economy Minnesota, left, received a tour with Jared Newton, Connexus Energy's director of Engineering a

Minnesota utilities hope surge of big-scale batteries helps transition to clean energy

A state study released this month says the batteries are a necessary piece of plans to be carbon-free by 2040.
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Minnesota appeals court dismisses Mesabi lawsuit over Nashwauk mineral leases

The DNR revoked leases from Mesabi Metallics in 2021 after the company missed its latest deadline in pursuing a long-delayed taconite mine and partly built processing plant.
Big transmission lines run along Highway 52, across farmland pictured in 2021 outside Hampton.

A new plan for Midwest power lines could cost $23 billion. Is it enough?

Some experts have called a colossal new proposal for more than a dozen power lines in the region sparse.
The control room for Units 1 and 2 at Prairie Island Nuclear Power Plant in Welch, Minn., during a planned outage in 2017.

Xcel's Prairie Island nuclear plant returns after lengthy outage drew questions

State officials had asked the energy company to provide a detailed explanation for when the power plant could be running again.
Pulsar CEO Thomas Abraham-James stands in front of the company's Jetstream #1 helium exploration facility near Babbitt on the Iron Range.

Lab results show significant helium levels at drill site that would be Minnesota's first

One firm advising the Canadian company Pulsar Helium said it was the highest concentration of the gas it had ever seen.
A Senate committee on Thursday heard the case outlined by a GOP legislator that Minnesota municipalities should not ban gas stoves or heating.

Minnesota GOP bill would prevent municipalities from banning gas stoves, heating

There don't appear to be any local bans in the works, but the idea to prevent regulations has drawn support from home industry and was heard by a DFL-led committee on Wednesday.
Scott Redd, CEO and President of Sabathani Community Center, looks at the two 60-year-old gas boilers in the basement of Sabathani Community Center in

Can geothermal heat a south Minneapolis community hub?

Center leaders want to replace their 'Thelma & Louise' gas boilers with a geothermal system that would cost a total of $21 million as part of the idea of making it a "resilience hub."
The Coal Creek Power Station produces 1,100 Megawatts at full capacity and is the largest power plant in North Dakota.

Utility regulators approve Great River plan that aims for 90% carbon-free power by 2035

The Maple Grove-based cooperative has a deal to reduce coal power it buys from a North Dakota plant and wants to add wind, solar and battery power. The Sierra Club opposed the plan.
Firefighters execute a prescribed burn last week in response to the Smokehouse Creek fire, the largest wildfire in Texas history. Xcel says its equipm

Xcel admits its equipment helped spark historic Texas wildfire

The Smokehouse Creek fire has burned more than 1 million acres across the Texas Panhandle.
Xcel said Tuesday it will add another wind farm in North Dakota to its portfolio. File photo of an Xcel wind site in Colorado.

Xcel says big reason it needs to spend millions on new projects is regional grid's reliability risks

Minnesota needs to be ready with its own electricity sources, especially as severe weather hits more often.
At the Securian Center in downtown St. Paul, several dozen janitors from the SEIU, including Mohamed Geyre with his daughter Fadumo,6, protested their

Twin Cities office janitors kick off strike with pickets

"Week of action" planned as janitors, nursing home staff, teachers and others converge.
Passengers get on and off the light rail at the Capitol / Rice Street Station, Green Line light rail in St. Paul.

Person wounded in stabbing on Green Line light rail in St. Paul

The victim was treated for the injuries, and a suspect was arrested. The stabbing comes as Metro Transit works on improving light-rail safety.

Body found in St. Croix River at Hudson, Wis., park

Hudson police said they recovered the body in the water after being dispatched to the area of Lakefront Park around 8:30 a.m. Saturday.

Man dead after being found with gunshot wounds in south Minneapolis, police say

Homicide detectives are investigating the case.
In this handout photo provided by the Texas A&M Forest Service, the Smokehouse Creek wildfire in Texas burns on Wednesday. It so far has destroyed mor

Xcel stock falls after insurers allege utility's equipment is linked to large Texas wildfire

The Minneapolis-based company said it received a letter from a law firm representing property insurers aiming to notify Xcel had it "potential exposure for damages" from the Smokehouse Creek fire.
Xcel plans to build more solar arrays like this one, the first community solar array in Minnesota, which was set up in Rockford earlier this year by t

Minnesota Commerce official leaves for nonprofit in wake of conflict of interest complaints

The concerns raised by staff were tied to Louise Miltich's marriage to a solar industry lobbyist. Agency leaders said there was no conflict based on state law and policy.
Mary Mayer has been  hired as senior vice president of consumer growth for the Star Tribune.

Star Tribune hires Daily Beast manager as senior VP of consumer growth

Mary Mayer comes to the paper from the Daily Beast, where she built a subscription system for the national news site.
Pulsar CEO Thomas Abraham-James stood in front of the company's Jetstream #1 helium exploration facility in Babbitt on the Iron Range.

Helium is hiding below northern Minnesota. It could help fuel space exploration and medical tech.

Drillers looking for platinum and palladium stumbled on what may be a major helium reservoir in Minnesota. It is a sought-after commodity.
Microsoft will build a new data center in Becker, Xcel says. Shown here is a data center being built in California.

Xcel sells Becker land to Microsoft for data center, as it predicts major rise in energy demands

In a new long-range plan, Xcel predicted what amounts to a one-third spike in energy demand by 2040, a remarkable split from earlier estimates but one that mirrors national trends.
A community solar garden on Burns Valley Road in La Crescent, Minn.

Minnesota regulators cut community solar bill credits to save money for Xcel customers

The decision is estimated to save roughly $40 million a year for ratepayers, but was fiercely contested by solar garden operators and subscribers, including many local governments and schools who will lose expected savings.
Sled dogs John Lennon and Solo

Polaris snowmobile rider, company charged after Alaska collision that killed 3 sled dogs

Alaska State Troopers said the man and Polaris have been charged with a single charge of reckless driving.
Casks of spent fuel rods at Prairie Island Nuclear Power Plant in 2017.

Xcel asks for more nuclear waste storage to operate Prairie Island until 2050s

Keeping the plant open an extra 20 years is a crucial part of Xcel's plan for a carbon-free energy grid, but its waste storage on the banks of the Mississippi River has drawn controversy.
Xcel wants to charge people more from 3 to 8 p.m. for using electricity, including air conditioning.

Xcel plans higher electric rates during peak evening hours

The company tested the idea and says it could ease pressure on the electric grid and help it better use renewables. But one expert says Xcel's proposed rates are a "blunder waiting to happen."
Xcel wants to extend the life of Prairie Island nuclear plant by 20 years. Pictured is the plant's control room.

Xcel Energy wants to extend life of Prairie Island nuclear facility, add two gas plants

The company's latest blueprint for generating electricity will be scrutinized by state regulators and outside groups as Xcel seeks to meet Minnesota's carbon-free law.
The milking carousel at Louriston Dairy in Murdock, Minn, operated by Riverview LLP, in a 2018 file photo.

A pipeline for cow gas draws environmental support, ag concentration concerns

The PUC met at a bar in Benson, Minn., on Tuesday evening to hear citizen feedback on a plan to pump and sell biogas that could generate green energy.
Cleveland Cliffs is expanding its United Taconite mine in Eveleth. (GLEN STUBBE/Star Tribune file photo)

Cliffs CEO lashes out at U.S. Steel in first major comments on Nippon deal

In fiery comments, Lourenco Goncalves said his company is the better choice for labor as he pressured the administration to block the $14.1 billion megadeal with Nippon of Japan.
In a 2014 photo, power Lines run along side the road near Cedar Summit Farm in Minnesota. ] BRIAN PETERSON ¥ brian.peterson@startribune.com New P

Proposal would cut red tape so clean energy projects can be built faster in Minnesota

A potentially influential state task force, to move forward the 2040 carbon-free pledge, recommends a number of changes to the permitting process, but "prime farmland" rule likely to stay.
The PUC postponed Xcel Energy's rate increase request until next fall. (File photo)

Xcel's profits hit by expenses related to 550 job cuts

The Minneapolis-based company said hundreds of workers took retirement under a voluntary program and non-union cuts.
Bits of snow covered panels at a solar garden Winona subscribes to on Burns Valley Road in La Crescent.

A community solar plan would save Xcel customers money — but cost some cities and schools millions

Minnesota regulators are considering the plan that would reduce the amount of credits subscribers to these solar arrays receive.
There are two levels of charger your electric vehicle can use at your home.

Charging your electric vehicle is half the battle. Take these steps to make your home EV ready.

What the experts say about the cost and logistics of readying your house with one of the two types of electric vehicle chargers.
A solar garden in Scandia, Minn.

Conflict of interest complaints filed against Minnesota Commerce official over solar ties

Louise Miltich, who oversees a team analyzing the community solar program as an assistant commissioner, is married to a prominent solar industry lobbyist.

Walz appoints career regulator for seat on Minnesota Public Utilities Commission

Hwikwon Ham will join a five-member board that plays a key role in overseeing utilities and Minnesota's shift away from fossil fuels.
Tom Lais will be at home Wednesday evening. He's concerned about how long he'll be able to stay in his house, due to rising property taxes and homeown

Minnesotans take big hits on non-negotiable bills like electricity, insurance

While commodities inflation has declined, services inflation has remained stubborn.
An Xcel Energy solar farm in North Branch, Mn., pictured in December 2016. Photo: brian.peterson@startribune.com

Minnesota utility regulators approve refunds averaging $25 for Xcel residential customers

In total, the company will dole out nearly $187 million in the form of one-time bill credits as the result of a rate case.
Plant director Michelle Neal and Unit 3 operations foreman Eric Stotko look out over the Sherburne County Generating Station. The first unit of the la

Xcel closing first unit at Sherco coal plant, a milestone in energy transition

The closure brings a measure of uncertainty for plant workers, surrounding communities and Xcel itself. It's also a cause for celebration among clean energy advocates.
Electric schoolbuses are still rare despite grants and other programs. They’re expensive and aren’t as versatile as traditional ones.

Red Lake joins a small club: Minnesota school districts with e-buses

The northern Minnesota district, like others in the state, needed a grant because the e-buses are expensive. Other districts say there also are some infrastructural barriers.
U.S. Steel made a major investment in Keetac in recent years.

$14B U.S. Steel deal with Nippon will have impacts for Iron Range

The United Steelworkers union, which had backed a deal with Cleveland-Cliffs, has come out against the new deal. U.S. Steel owns MinnTac and Keetac and has a stake in Hibbing Taconite.
Sled dogs John and Solo on March 7, 2022.

Three sled dogs killed in Alaska crash with Polaris snowmobile test driver

No humans were hurt, but two other dogs were also injured in the crash, according to the Alaska State Troopers.