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It may take decades to close all the abandoned gold rush mines.

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It may take decades to close all the abandoned gold rush mines.


Mere feet from a prospect pit where miners dug for gold in the second half of the 19th century, bikers whizzed by on the Maryland Mountain trail system west of Denver.

“This one is 15-to-16-feet deep with vertical walls. You wouldn’t have an easy time getting out of it,” said Jeremy Reineke, a project manager with the Colorado Division of Reclamation, Mining and Safety. “You can see how close it is to the trail if a biker decided to take off and miss a corner or decide to go off trail, you could get on this really fast.”

An abandoned prospect pit in Colorado that will soon be covered by a metal grate to prevent cyclists from falling in. (Elizabeth Trovall/Marketplace)

Reineke oversees the closure of mines and prospect pits like this one near Central City, Colorado. The town was situated on what was once considered the richest square mile on Earth because of the gold mining that was a boon to the region’s economy. At that time, the digging involved shovels, picks and mules. And after that hard labor, sometimes there wasn’t enough ore to move forward.

Reineke said there are “thousands and thousands” of unmapped prospect pits.

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Four men stand in front of an abandoned mine. Two wear yellow safety vests.
From left, Tim Alger and Edwin Schmidt of Hayduke Environmental stand in front of a closed, abandoned mine with Jeff Graves and Jeremy Reineke of the Colorado Division of Reclamation, Mining and Safety. (Elizabeth Trovall/Marketplace)

Soon, the prospect pit near the bike trail will be covered by a metal grate so trailgoers don’t fall in.

It’s critical public safety work, especially as hiking and bike paths are created in former mining areas, said Jeff Graves, director of the state’s Inactive Mine Reclamation Program. 

“There have been instances of fatalities in Colorado associated with folks in abandoned mines,” Graves said. “A child fell into a mine shaft just outside of Central City. And so that prioritized a lot of the work here within Gilpin County.”

That was in 1989. 

A sign that says "Hazardous mines will kill you" and lists ways people die in mine shafts and tunnels.
At the Gilpin History Museum, a warning about the dangers of abandoned mines. (Elizabeth Trovall/Marketplace)

But in a state where mining was fundamental to its early economy, the quiet work of closing up these mines will likely go on for decades. 

Around 13,500 mine features have been closed so far, including shafts, adits, stopes, pits, highwalls and hazardous facilities, according to Graves. The state has the capacity to safeguard about 300 each year.  

“Maybe we’re halfway through the total, hopefully,” he said. “But likely, we still have at least that many more within the state that need some type of physical safety, closure constructed on them.” 

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The program addresses hazards that predate Colorado statehood. “Without the mining, Gilpin County would not exist. Probably Colorado as we know it would not exist,” said David Forsyth, director of the Gilpin Historical Society. 

He said it’s hard to overstate the importance of mining to the area. 

“It was really [miner] John Gregory’s discovery of lode gold up here in May of 1859 that kind of made Colorado’s gold rush permanent,” Forsyth said.  

A historic photograph of miners in a mine.
Inside the Bobtail Mine at Colorado’s Black Hawk Canyon. (Courtesy Gilpin Historical Society)

He said news of that discovery drew thousands of miners within weeks. 

“The country was still really recovering from the Panic of 1857,” Forsyth said. “And so, a lot of people were still really hurting financially. And easy gold, ‘Hey, I can go out to Gregory Diggings in Colorado and get rich.’” 

Few actually made it rich — but the mining did provide jobs. 

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Forsyth said miners earned around $2 to $3 per day, and houses, stores, schools and theaters were built as the mines operated. But by the early 20th century, mining activity had slowed significantly and halted during World War I and World War II. 

“It was not a wartime necessity, and it never really came back after that,” Forsyth said. “A lot of people who had mines up here just parked their equipment inside, shut the door, said, ‘We’ll be back when the war is over.’ And then they weren’t.”

Until folks from the Inactive Mine Reclamation Program came around many decades later — in some cases welding mines closed with old equipment still inside.

“It’s reminiscent of what the miners are doing to some extent, trying to find that original gold,” Graves said. “We’re trying to find what they were looking for and what they caused, what they left in their wake.”

The lack of regulation at the time allowed these mines to be abandoned — and not just in Colorado. 

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A metal grate in front of an entrance to an abandoned mine.
A metal grate prevents human entry to this abandoned gold mine but allows bats to fly in and out. Many have made abandoned mines their homes. (Elizabeth Trovall/Marketplace)

The U.S. Government Accountability Office estimates there are some 140,000 known abandoned hard-rock mining features on federal lands, and hundreds of thousands more may be unaccounted for. 

Graves said Colorado’s program benefits from both state and federal funds. Additional money from the Bipartisan Infrastructure Law will help by freeing up state funds previously used for coal mines.

Even so, Graves said, efforts to close abandoned hard-rock mines are “certainly underfunded.”

“When you look at the magnitude of the problem, even in Colorado it would take us decades to address [it] at the current funding rates,” he said.

It looks like state governments, as well as the feds, will be paying to clean up after the 19th century gold diggers well into the 21st century. 

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Colorado quarterback Dominiq Ponder dies in single-car crash at age 23, police say

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Colorado quarterback Dominiq Ponder dies in single-car crash at age 23, police say


BOULDER, Colo. (AP) – Colorado quarterback Dominiq Ponder died early Sunday morning in a single-car crash, police said. He was 23.

Ponder was driving a 2023 Tesla when he lost control on a curve and hit a guardrail, according to the Colorado State Patrol. The car struck an electrical line pole and rolled down an embankment.

Ponder was pronounced dead at the scene in Boulder County. Police said a preliminary investigation “shows that speed is suspected as a factor.”

FILE – Colorado quarterback Dominiq Ponder (22) warms up before an NCAA college football game Sept. 14, 2024, in Fort Collins, Colo.(Source: AP Photo/David Zalubowski, File)

Ponder played in two games for the Buffaloes last season, going 0-for-1 passing and carrying the ball twice for a loss of 4 yards. The 6-foot-5 sophomore from Opa Locka, Florida, began his collegiate career at Bethune-Cookman before transferring.

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The Buffs were slated to begin spring practice on Monday.

“God please comfort the Ponder family, friends & Loved ones,” Colorado coach Deion Sanders posted on X. “Dom was one of my favorites! He was Loved, Respected & a Born Leader. Let’s pray for all that knew him & had the opportunity to be in his presence. Lord you’re receiving a good 1.”

Colorado offensive coordinator Brennan Marion reposted Sanders’ statement and called Ponder a joy to be around and coach.

“Getting that call from his dad today didn’t feel real,” Marion posted. “Love you Dom! God cover his family & our team, especially our qb room!”

Colorado athletic director Fernando Lovo said Ponder “epitomized the values of passion, enthusiasm, leadership, toughness, and intelligence that were revered by his teammates and coaches alike.” The athletic department said it would make counseling resources available to players and staff.

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Fellow Colorado quarterback Colton Allen also paid tribute to Ponder on Instagram.

“Dom, you were a blessing to so many people,” Allen wrote. “You had a presence about you that just made everything better. You brought so much joy to me and everyone around you. I’m grateful for every lift, every practice, every rep, every conversation we got to share. I’ll carry those with me for the rest of my life.”

The Big 12 Conference extended its condolences in a post on X.

___

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Copyright 2026 The Associated Press. All rights reserved.





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Colorado lawmakers duel over data centers: Grant millions in tax breaks or regulate them without incentives?

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Colorado lawmakers duel over data centers: Grant millions in tax breaks or regulate them without incentives?


Colorado lawmakers are deciding this year between two disparate approaches on data centers — one that aims to lure them to the Centennial State with millions of dollars in tax incentives and another that would implement some of the strictest statewide regulations in the country on the booming tech industry.

Either of the two competing bills would create the state’s first regulations specific to data centers. Sponsors of both bills say they hope to minimize environmental impacts from the power and water demands of the centers, while also ensuring that the cost of new infrastructure they need doesn’t wind up on residents’ electric bills.

Both bills are sponsored by Democrats but differ widely in what they’d do.

The bill supported by the data center industry — House Bill 1030 — would incentivize companies to comply with regulations in exchange for large tax breaks. The legislation would not regulate data centers whose owners forgo a tax break.

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The other bill — Senate Bill 102 —  would offer no incentives, instead imposing regulations on all large data center development across the state. It is supported by environmental and community groups.

“We want to make sure that as data centers come here, they come on our terms,” said Megan Kemp, the Colorado policy representative for Earthjustice’s Rocky Mountain office.

The bills have landed as debate over the future of data center regulation intensifies across the state. Data centers house the computer servers that function as the main infrastructure for the digital world. They crunch financial data, store patients’ health information, process online shopping, register sports betting and — increasingly — make possible the heavy data demands of artificial intelligence.

Several companies have begun construction on large data centers across the Front Range in recent years. A 160-megawatt hyperscale facility is under development in Aurora and could consume as much power as 176,000 homes once completed.

The construction of a 60-megawatt data center campus in north Denver has angered those who live by the site and prompted Denver city leaders last week to call for a moratorium on new data center development while they craft regulations for the industry. Larimer County and Logan County have enacted similar moratoriums.

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Hundreds gathered Tuesday night at a community meeting about the northern Denver campus owned by CoreSite. Frustration in the crowd — which filled overflow rooms and the front lawn of the building that hosted the meeting — erupted as residents of the neighborhoods surrounding the center expressed concerns about how it would impact their air quality, power and water supplies.

Attendees said they did not know the data center was being built until they saw construction underway.

CoreSite leaders had planned to attend the meeting. But they pulled out of participating the day before because of safety concerns, company spokeswoman Megan Ruszkowski wrote in an email. She did not elaborate on the concerns. A Denver police spokesman said the department did not have any record of a police report filed by CoreSite in the days prior to the meeting.

CoreSite’s absence left officials from the city and utilities to answer the crowd’s questions and field their frustrations. City leaders told attendees that they had no say in whether the data center could be built because there are no city regulations specific to the industry.

“Data centers are proliferating quickly and we don’t know all the impacts,” said Danica Lee, the city’s director of public health investigations. “That’s why we need this moratorium.”

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Promises of future regulation meant little to the residents of Elyria-Swansea, where the data center is scheduled to go online this summer. More than an hour into the meeting, a man took the microphone. He noted that so much of the conversation had focused on technicalities — but the information provided had not answered a question on many residents’ minds.

“How do we stop it now?” he asked, to a loud round of applause from the room.

An overflow crowd watches through the windows during a community meeting at Geotech Environmental to discuss concerns about a new data center under construction in the Elyria-Swansea neighborhood in Denver on Tuesday, Feb. 24, 2026. (Photo by AAron Ontiveroz/The Denver Post)

Transformative opportunity?

Some in the state Capitol think more data centers would be beneficial for Colorado.

Supporters of the tax incentive bill in the legislature said luring the industry to Colorado would create high-paying jobs, help pay for electrical grid modernizations and strengthen local tax bases.

“This could be transformative for the state,” said Rep. Alex Valdez, a Denver Democrat who is one of HB-1030’s sponsors.

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In exchange for complying with rules, data center companies would be exempted from sales and use taxes for 20 years for purchases related to the data center, like the expensive servers they must replace every few years. After two decades, the companies could apply for an extension to the exemption.

To earn the tax break, data center companies would have to meet requirements that include:

  • Breaking ground on the data center within two years.
  • Investing at least $250 million into the data center within five years.
  • Creating full-time jobs with above-average wages, though the legislation doesn’t specify how many jobs would be required.
  • Using a closed-loop water cooling system that minimizes water loss, or a cooling system that does not use water.
  • Working to make sure the data center “will not cause unreasonable cost impacts to other utility ratepayers.”
  • Consulting with the Colorado Department of Natural Resources about wildlife and water impacts.

While the bill would exempt data centers from sales tax on some purchases, they would still be on the hook for all other taxes, Valdez said, and would bring both temporary and permanent jobs. The bill does not specify how many permanent jobs must be created to qualify for the tax break.

Dozens of other states have enacted tax incentive programs for data centers. Such incentives are a key factor that companies weigh when deciding where to build, said Dan Diorio, the vice president of state policy for the Data Center Coalition, an industry group.

“Colorado is not competitive right now,” he said.

Figuring out the projected impact of the bill on the state’s finances gets complicated.

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The legislature’s nonpartisan analysts estimated that the state would miss out on $92.5 million in sales tax revenue in the first three years, assuming a total of 17 data centers would qualify for the tax breaks in that time period.

But Valdez said that is revenue that the state otherwise wouldn’t see if the data centers weren’t built here. And the companies would still pay all other state and local taxes, he said.

“We see it as unrealized revenue, rather than a tax cut,” he said.

Some of that lost tax revenue would be offset by an increase in income taxes paid by low-income families, according to the bill’s fiscal note.

That’s because the projected decrease in sales tax revenue in the first year of the program would decrease the amount of money available for the state to provide its recently enacted Family Affordability Tax Credit. State law ties the amount available for the family tax credit to state revenue growth and whether the state collects money above a revenue cap set by the Taxpayer’s Bill of Rights. TABOR requires money above that level to be returned to taxpayers.

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If the state doesn’t have excess revenue, it can’t fund that tax credit.

In the next fiscal year, which begins in July, data center companies would avoid paying $29 million in sales taxes, which would trigger a change in the family tax credit. Low-income families would be made to pay a total of $106 million more, the fiscal note estimates.

Bill sponsors are planning to address the fallout for the tax credit in forthcoming amendments, Valdez said.

“We’re not out to trigger any negative impacts to low-income families,” he said.

Tyler Manke skateboards at Elyria Park near a new data center being built by CoreSite in the Elyria-Swansea neighborhood of Denver on Tuesday, Feb. 24, 2026. (Photo by AAron Ontiveroz/The Denver Post)
Tyler Manke skateboards at Elyria Park near a new data center being built by CoreSite in the Elyria-Swansea neighborhood of Denver on Tuesday, Feb. 24, 2026. (Photo by AAron Ontiveroz/The Denver Post)

Baseline guardrails

Forgoing tax dollars during a state budget crisis is a hard sell to Rep. Kyle Brown, a Louisville Democrat sponsoring the regulatory bill. He and other supporters of SB-102 aren’t convinced tax incentives are necessary to bring data centers to the state.

Major construction projects are already underway, he said. In Denver, CoreSite chose not to pursue $9 million in tax breaks from the city but continued construction on its facility regardless.

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“The point of our policy is (putting) reasonable, baseline guardrails on this development so it can be smart,” Brown said.

Brown last session co-sponsored a failed bill with Valdez that offered tax incentives to data centers. Since then, however, he’s seen other states that offer tax incentives express buyers’ remorse, he said.

Brown pointed to concerns in Virginia about rising electricity costs due to data center demand and a proposal by the governor of Illinois to suspend the state’s tax credit so that the impacts of the data center boom it sparked could be studied.

His bill this session — co-sponsored by Sen. Cathy Kipp, a Fort Collins Democrat — requires that data centers over 30 megawatts:

  • Draw as much power as possible from newly sourced renewable energy by 2031.
  • Pay for any additions or changes to the grid needed to serve the data center.
  • Adhere to local rules about water efficiency.
  • Limit the use of backup generators that consume fossil fuels; if such generators are necessary, they must be a certain type that limits emissions.
  • Conduct an analysis of the data center’s impacts on local neighborhoods, engage in community outreach and sign a legally binding good-neighbor agreement if the community is disproportionately affected by pollution.

Owners of data centers would also need to report metrics annually to the Colorado Department of Public Health and Environment. They would cover the center’s annual electricity consumption, how much of that power came from renewable sources, the total number of hours backup generators were used and annual water use.

Utilities, too, would face additional requirements.

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Colorado family pushes for change after rare disease clinical trial abruptly ends

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Colorado family pushes for change after rare disease clinical trial abruptly ends


This week marks Rare Disease Week, a time when families across the country are sharing their struggles with access to treatments and clinical trials, and their hopes for change, with lawmakers and federal health officials. A Colorado family is now adding its voice to the chorus after a clinical trial their son relied on suddenly ended.



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