Colorado’s congressional delegation is stepping directly into a long-running local brawl over a limestone quarry that towers above Glenwood Springs, filing the Glenwood Hot Springs Protection Act this week in a bid to shut down a major expansion plan before it ever gets federal approval.
If it passes, the measure would stop the Bureau of Land Management from processing or approving permits that enlarge the Mid‑Continent limestone quarry’s footprint or send more heavy truck traffic rumbling through the tourist town. It is a rare move by Colorado’s federal lawmakers to wade into a local land‑use fight that has dragged on for years and shows no sign of disappearing quietly.
What the bill would do
The proposal would bar the Secretary of the Interior from processing or signing off on any application to expand mineral operations on BLM land inside specific sections of Garfield County that cover the Mid‑Continent site. In practical terms, that would block the pending mine‑expansion proposal on those parcels.
The Senate version, filed by Sens. Michael Bennet and John Hickenlooper, spells out the legal land descriptions and prohibitions and is paired with a companion House push by Rep. Jeff Hurd, according to Sen. Bennet’s office.
BLM review and the "complete" filing
On a separate track, the Bureau of Land Management has moved Rocky Mountain Industrials’ third modified plan of operations into a technical review after declaring the company’s latest submission "complete." That procedural label comes before any formal public notice and comment period.
BLM field staff told The Sopris Sun that the agency plans a question‑and‑answer style technical review and will withhold RMI’s written proposal from public release until that work is finished.
Local leaders and tribal concerns
Glenwood Springs officials, the Glenwood Springs Citizens’ Alliance and local business groups have warned for years that a bigger quarry would mean hundreds of truck trips every day, more dust and noise, and possible harm to the aquifer that feeds the town’s famous hot springs.
Marvin Pinnecoose, chairman of the Southern Ute Tribal Council, has called the hot springs "sacred." Rep. Jeff Hurd, who represents the Western Slope district, said during a press call that the legislation "should not be very controversial at all," according to The Colorado Sun.
The company and its Front Range plan
Rocky Mountain Industrials runs the Mid‑Continent Quarry through a subsidiary and has been working on a Front Range rail park designed to ship aggregate to Denver‑area construction projects.
In May 2024, the company closed a $26 million commercial financing deal for that rail‑park effort, bringing total project financing to roughly $127 million, according to the company’s SEC filings.
Regulatory history in short
Federal regulators tightened the screws on the quarry in January 2025, when the Interior Department concluded the operation was producing "common variety" limestone rather than a higher‑value locatable mineral. That finding halted mining and forced Rocky Mountain Industrials to seek a new permit with more intensive scrutiny.
The Determination of Common Variety, a January 2023 rockslide at the site and a string of noncompliance notices all helped set the stage for today’s standoff, as outlined in BLM background documents.
Legal stakes
The fight has been just as fierce in court as it has in public meetings. The Glenwood Springs Citizens’ Alliance and Garfield County have sued the BLM over permitting and enforcement, while Rocky Mountain Industrials has filed its own lawsuits against local authorities.
Public records and the alliance’s own timeline describe multiple rounds of litigation, agency orders and reclamation bond actions that keep the quarry in a constant state of regulatory and legal suspense, according to the Glenwood Springs Citizens’ Alliance timeline.
What comes next
If the Glenwood Hot Springs Protection Act becomes law, it would flatly prohibit the Interior Department from approving quarry expansions on the covered BLM parcels above town. If Congress does not act, the near‑term future runs through the BLM’s technical review, whatever environmental studies are required, and what could be years of public comment periods and courtroom wrangling.
For now, both sides say they are in it for the long haul, with local leaders focused on protecting tourism and cultural resources and Rocky Mountain Industrials intent on pursuing its distribution and development plans. That leaves the quarry’s fate tied to a complicated mix of politics, federal review and ongoing legal battles, according to Sen. Bennet’s office and local reporting.
