The Borate and Daggett Railroad, a 3-foot narrow-gauge railway operational from 1898 to 1907 in California’s Mojave Desert, was a critical infrastructure project for the borax industry. Stretching 11 miles from Daggett to the Borate mining camp, it replaced inefficient mule teams, significantly reducing transportation costs for colemanite borax. Built by the Pacific Coast Borax Company under Francis Marion Smith, the railroad featured innovative engineering, including Heisler locomotives and a roasting mill for on-site ore processing. Despite its success, declining ore quality and the discovery of richer deposits elsewhere led to its abandonment in 1907.
Background
The borax industry gained prominence in the late 19th century due to the mineral’s applications in detergents, glass, and metallurgy. In 1883, colemanite deposits were discovered in the Calico Mountains, acquired by William Tell Coleman, who relied on twenty-mule teams to transport borax to railheads. After Coleman’s bankruptcy in 1890, Francis Marion Smith, the “Borax King,” took over, forming the Pacific Coast Borax Company. By 1899, the renamed Borate mine was the world’s largest, producing 22,000 short tons annually. The high cost and slow pace of mule teams necessitated a more efficient transport solution, leading to the railroad’s construction.
Construction and Design
Completed in 1898, the Borate and Daggett Railroad was a 3-foot narrow-gauge line designed to navigate the Calico Mountains’ 7% grades. The 11-mile route connected the Borate mine to Daggett, a Santa Fe mainline hub. Two Heisler steam locomotives, “Marion” and “Francis,” powered the line, leveraging geared drive systems for steep terrain. A roasting mill at the midpoint, named Marion, processed ore into burlap bags, and a third rail facilitated transfers to standard-gauge boxcars. The narrow gauge design and Heisler technology minimized costs while ensuring reliability in the harsh desert environment.
Operations and Economic Contributions
![Borate & Daggett Heisler locomotive #2 "Francis" (s/n 1026), at Daggett, California in 1910. The locomotive helped to construct the Death Valley Railroad in 1913, before being sold to the Nevada Short Line Railway in 1916 where it retained its number #2.[4] It ended its days working for the Terry Lumber Company (later Red River) at Round Mountain, California until about 1925.](https://i0.wp.com/www.destination4x4.com/wp-content/uploads/2025/05/Borate__Daggett_No._2_Francis_stored_at_Daggett_CA.png?resize=796%2C370&ssl=1)
From 1898 to 1904, the railroad was integral to the Pacific Coast Borax Company’s operations, transporting large colemanite volumes at lower costs than mule teams. The Marion mill enhanced efficiency by processing ore on-site. The railroad bolstered
Daggett’s role as a regional hub, supporting jobs and infrastructure. However, narrow gauge limitations, such as small train capacities, occasionally constrained output. At its peak, the railroad underpinned Borate’s status as the world’s leading borax mine, driving economic growth in the Mojave Desert.
Decline and Abandonment
By 1904, Borate’s colemanite quality declined, prompting Smith to focus on richer deposits at the Lila C. Mine in Death Valley. The Tonopah and Tidewater Railroad, completed in 1907, served the new mine, rendering the Borate and Daggett Railroad
obsolete. Mining at Borate ceased in 1907, and the railroad was abandoned. Rails were scrapped, and equipment was left in Daggett or repurposed for the Death Valley Railroad. The Heisler locomotives were later sold to the Forest Lumber Company in Oregon until they closed in 1939.
Legacy
The Borate and Daggett Railroad demonstrated the efficacy of narrow-gauge systems for mineral transport, influencing projects like the Death Valley Railroad. Its equipment reuse and documented history, including photographs and railbeds, preserve its legacy . The railroad exemplifies the interplay of technology and economics in the borax industry, highlighting the transient nature of resource-driven infrastructure in the American West.
Borate and Daggett Railroad Summary
| Name | Borate and Daggett Railroad |
| Location | Mojave Desert, San Bernardino, California |
| Length | 11 miles |
| Gage | Narrow Gauge – 3 feet (914 mm) |
| Operational |
