Union Pacific Receives First Long Rail from Rocky Mountain Steel’s New $1.2 Billion Mill
Rocky Mountain Steel Mills has officially commenced operations at its new $1.2 billion long rail manufacturing facility in Pueblo, Colorado, marking a major milestone for both the U.S. steel industry and the nation’s rail infrastructure. The launch was celebrated with the delivery of the first stick of rail to Union Pacific Railroad, symbolizing the continuation of one of the longest-standing industrial partnerships in American manufacturing.
The event represents more than the opening of a new production facility. It reflects a renewed commitment to domestic manufacturing, advanced steel production, sustainable industrial practices, and strengthening the nation’s transportation supply chain. The state-of-the-art rail mill is expected to play a vital role in supplying premium-quality rail products for the modernization and expansion of the U.S. railroad network while supporting thousands of jobs throughout the domestic steel sector.
A Historic Partnership Continues
Union Pacific’s relationship with Pueblo’s steel industry dates back nearly a century and a half. In 1882, the railroad purchased the very first stick of rail produced by the original Pueblo rail mill, establishing a partnership that has endured through generations of industrial growth, technological advancement, and infrastructure development.
More than 140 years later, that historic relationship entered a new chapter as Union Pacific once again became the first customer to receive rail produced at the newly commissioned facility.
To commemorate the occasion, Union Pacific Chief Executive Officer Jim Vena led a delegation of company executives to the Pueblo site, where they toured the new mill, met with Rocky Mountain Steel employees, and celebrated the beginning of commercial operations.
The visit highlighted the shared commitment of both organizations to strengthening domestic manufacturing capabilities while ensuring reliable transportation infrastructure across the United States.
Seven-Year Supply Agreement Reinforces Commitment
The milestone follows the announcement made earlier this year that Union Pacific and Rocky Mountain Steel Mills signed a new seven-year supply agreement covering the domestic production of steel rail.
The long-term contract reinforces Union Pacific’s strategy of sourcing the majority of its rail requirements from American manufacturers while supporting domestic steel production.
The agreement provides long-term stability for both organizations by ensuring reliable rail supply for one of North America’s largest freight railroads while supporting continued investment in Colorado’s steel industry.
The partnership also demonstrates growing confidence in American-made infrastructure materials at a time when strengthening domestic supply chains has become an increasingly important national priority.
A Strategic Investment in American Manufacturing
The newly opened long rail mill represents an investment of approximately $1.2 billion in advanced manufacturing technology, modern steel production, rail infrastructure, and workforce development.
Designed as one of the most technologically advanced rail manufacturing facilities in the world, the mill significantly expands America’s capacity to produce premium steel rail domestically.
The project also reflects a broader trend of reinvestment in U.S. industrial manufacturing as companies seek to reduce reliance on imported materials while strengthening national supply chains.
For Colorado, the investment reinforces Pueblo’s long-standing identity as one of America’s most important steel-producing cities.
Producing Longer, Stronger Rail
A defining feature of the new mill is its ability to manufacture premium steel rail in lengths of 100 meters (328 feet), substantially longer than traditional rail sections.
Longer rail offers significant operational advantages for railroad operators.
Because the extended rail lengths require approximately 80 percent fewer welds compared to conventional 80-foot rail sections, they improve overall track performance while reducing maintenance requirements.
Fewer welds translate directly into:
- Improved track durability
- Enhanced operational safety
- Lower maintenance costs
- Greater ride quality
- Increased network reliability
For major freight railroads such as Union Pacific, these benefits contribute to more efficient operations across thousands of miles of track.
Strengthening America’s Rail Network
Union Pacific operates one of the largest freight railroad systems in North America, serving communities, industries, ports, and businesses across much of the western United States.
Reliable rail infrastructure is essential for transporting agricultural products, automobiles, consumer goods, industrial materials, energy products, and countless other commodities that support the American economy.
The new production capability at Rocky Mountain Steel Mills ensures that Union Pacific will continue to have access to high-quality domestically produced rail capable of supporting future infrastructure investments.
Jim Vena, Chief Executive Officer of Union Pacific, said the partnership reflects the shared commitment of two iconic American companies to manufacturing, job creation, and community investment.
He noted that the renewed collaboration strengthens national supply chains while demonstrating the critical role rail transportation continues to play in supporting economic growth throughout the country.
Continuing Pueblo’s Steelmaking Legacy
For Rocky Mountain Steel Mills, the launch represents another chapter in Pueblo’s long history as one of America’s premier steel manufacturing centers.
Doug Matthews, Chief Executive Officer of Orion Steel, the parent company of Rocky Mountain Steel Mills, emphasized that Pueblo’s industrial heritage reflects generations of innovation, resilience, and skilled craftsmanship.
According to Matthews, the opening of the new mill represents an investment not only in modern manufacturing technology but also in American workers, Colorado’s economy, and the long-term future of domestic steel production.
He said the continued partnership with Union Pacific demonstrates the benefits that can be achieved when American companies invest together in strengthening national manufacturing capabilities.
Supporting Union Manufacturing Jobs
The facility continues a long tradition of union manufacturing in Pueblo.
Steel produced for Union Pacific, as well as for all other Rocky Mountain Steel customers, is manufactured by members of the United Steelworkers (USW).
The organization has represented steelworkers involved in producing rail and other critical infrastructure products for decades.
United Steelworkers International President Roxanne Brown highlighted the important role union members have played in building America’s infrastructure.
She noted that the premium rail produced in Pueblo will continue supporting transportation networks while creating stable, high-quality manufacturing jobs that benefit local communities for generations.
The project further reinforces the importance of skilled manufacturing careers within America’s industrial economy.
Beyond Rail Manufacturing
Although the new rail mill serves as the centerpiece of the Pueblo operation, Rocky Mountain Steel Mills manufactures a broad portfolio of high-performance steel products serving numerous industries.
The facility produces:
- Premium railroad rail
- Wire rod
- Reinforcing bar (rebar)
- Seamless Oil Country Tubular Goods (OCTG)
These products support infrastructure, commercial construction, telecommunications, automotive manufacturing, and energy development.
The seamless pipe products manufactured at the facility are designed specifically for demanding oil, natural gas, and geothermal drilling environments where durability and performance are critical.
Significant Production Capacity
The Pueblo facility operates with an annual steelmaking capacity of approximately 1.1 million tons.
This production capability allows Rocky Mountain Steel Mills to serve a wide range of domestic customers while maintaining flexibility across multiple industrial sectors.
Its diverse product mix helps support infrastructure development, industrial expansion, and manufacturing growth throughout North America.
The addition of advanced long rail production further strengthens the facility’s position as one of the continent’s most important steel manufacturing operations.
Leading the Industry in Sustainability
The new Pueblo operation also establishes new benchmarks for environmentally responsible steel production.
Unlike traditional blast furnace operations, the facility produces 100 percent of its steel using Electric Arc Furnace (EAF) technology.
Electric Arc Furnace production significantly reduces greenhouse gas emissions by utilizing recycled steel scrap as the primary raw material.
According to the company, this manufacturing process generates approximately 75 percent fewer carbon dioxide emissions than conventional blast furnace methods.
The environmental advantages extend beyond steelmaking technology itself.
World’s Largest Solar-Powered Steel Mill
One of the facility’s most distinctive features is its extensive renewable energy infrastructure.
Approximately 750,000 solar panels installed on-site provide up to 95 percent of the mill’s electricity requirements.
This achievement makes the Pueblo operation both the first and the largest solar-powered steel mill in the world.
By integrating renewable electricity into large-scale industrial production, Rocky Mountain Steel Mills demonstrates how heavy manufacturing can significantly reduce its environmental footprint while maintaining high production efficiency.
The combination of Electric Arc Furnace technology and solar power positions the facility among the most sustainable steel manufacturing operations globally.
Supporting America’s Infrastructure Future
As operations officially begin, the new long rail mill is expected to play an increasingly important role in supporting infrastructure investment throughout the United States.
From freight rail modernization to commercial construction and energy development, the facility’s products will contribute to projects that strengthen transportation networks, industrial capacity, and economic growth.
For Union Pacific and Rocky Mountain Steel Mills, the first delivery from the new mill represents more than the start of production—it marks the continuation of a historic partnership built on innovation, American manufacturing excellence, and a shared commitment to investing in the nation’s future.
With advanced production capabilities, sustainable manufacturing practices, and long-term customer partnerships now firmly in place, the Pueblo facility is positioned to remain a cornerstone of the U.S. steel industry for decades to come.
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