Red Mountain cut
The project represented the latest in a series of proposals to create a Red Mountain Tunnel through the ridge to connect Birmingham to Homewood and other new residential areas to the South. The recommendation to use a road cut rather than a tunnel was made by Harland Bartholomew and other consultants in their 1960 report to the Birmingham Downtown Improvement Association and the Jefferson County Commission. The cities of Birmingham, Homewood, Mountain Brook and Vestavia Hills subsidized the study along with the County Commission and Alabama State Highway Department.
The expressway was planned as a six-lane limited-access highway to accommodate anticipated traffic demand for 1980 (29,400 cars and 990 heavy trucks per day). The engineers evaluated a total of 23 possible routes across the mountain, which they narrowed down to six preferred candidates, three in tunnels and three exposed as cuts. All the evaluated options used 26th Street South as the starting point. The route finally selected ("Cut Route D") was the one projected to involve the least cost in purchasing right-of-way and executing construction work. The planners also considered the route's "s-curve" to have aesthetic appeal.
The removal of 2 million cubic yards of the ridge of Red Mountain exposed over 190 million years of geologic strata dating to over 500 million years ago. The Ordovician, Silurian, Devonian and Mississippian geologic periods are visible in the cut. Special features include caves, volcanic ash layers, the Red Mountain fault line, prehistoric reefs and beaches, fossils and fossil tracks. Significantly, the cut reveals the cross-section of the red ore seam that spurred Birmingham's development and a layer containing fossils of a unique Silurian trilobite species.
A new city-owned science museum, The Red Mountain Museum, was opened on the slope adjacent to the cut in February 1978. The impetus for the museum grew out of the protests of geologists from the Geological Survey of Alabama, Birmingham-Southern College, and the Alabama Geological Society, who, with the support of the Linn-Henley Charitable Trust, convinced the Highway department to stop spraying concrete over the exposed rock strata. Museum-sponsored paleontologists recovered a large collection of fossils which now form the core of a valuable collection of Alabama fossils held by the McWane Science Center. Interpretive signage was installed along one of the eastern terraces of the cut and guardrails and fencing installed to allow museum visitors to inspect the exposed rock close-up. It is one of only three such "interpretive cuts" in the United States. The others are along Interstate 70 near Denver, Colorado and Interstate 68 in western Maryland.
In 1991, the Red Mountain Museum partnered with a nearby children's science museum, The Discovery Place, to form "Discovery 2000". Together they moved to downtown Birmingham in 1998 and became the McWane Science Center.
In 1987 the Red Mountain Expressway Cut was granted National Natural Landmark status by the National Park Service. Deemed unsafe because of the potential for rockslides, the interpretive trail has since been closed to the public.
In 2006 McWane president Tim Ritchie and staff paleontologist James Lamb discussed the possibility of selling the former Red Mountain Museum property, but keeping a public access to the walkway, which could be renovated and reopened. In 2007 the City of Birmingham reached an agreement with the Dominican Sisters of St Cecilia Congregation to purchase the former Red Mountain Museum for $606,632 for use as parking for its St Rose Academy. The city would retain the small neighborhood park adjacent to the museum, and the locked access to the Red Mountain cut walkway. Proceeds from the sale will be directed to the McWane Science Center.
 External links
- Library of Congress page about the Red Mountain Expressway Cut.
- Beiman, Irving (December 21, 1960) "11½ million Red Mtn. expressway cut urged" Birmingham News - via Birmingham Rewound
- White, Marjorie Longenecker (1981) "Red Mountain Museum" in The Birmingham District: An Industrial History and Guide Birmingham: Birmingham Historical Society. p. 222
- Hickerson, Patrick. (April 23, 2006) "McWane eyes Red Mountain path revival: Cut near old museum site puts rock history on display." Birmingham News.
- Coman, Victoria L. (May 15, 2007) "Vote on selling museum site to St. Cecilia nuns expected." Birmingham News.