Completed in 1915, the old Fromberg Bridge was the crowning achievement of Carbon County's concrete bridge program and the first use of reinforced concrete arches in Montana. Built across the Clark's Fork with cement supplied by John Gibson of the Gibson Concrete Works in Fromberg, it reflected a rare local opportunity to experiment with concrete construction. Gibson, a pioneer in concrete building techniques, also manufactured cement buildings, chimney blocks, ornamental cornices and columns, and a patented sectional concrete culvert. The Beley Construction Company of Livingston won the $10,000 contract, began work in May 1914, and opened the bridge to traffic in January 1915. The 219-foot multi-span solid arch structure, the largest of its kind in Montana, provided a critical link for farmers, ranchers, and schoolchildren on the east side of the Clark's Fork to reach Fromberg's railroad station and school; during part of construction, students had to ford the river. Ornamental detailing decorated the arch sidewalls and guardrails, and local pride celebrated the structure before it eventually succumbed to old age and was replaced by the Department of Transportation in the early 21st century.