Near Keystone in Custer County, South Dakota — The American Midwest (Upper Plains)
The Pigtail Bridges
Riding horseback from his home at the Game lodge, Gideon and Senator Norbeck spent long hours laying out the Iron Mountain Road, the tunnels that frame Mount Rushmore and the bridges.
Norbeck wanted a rustic look but the elevation drop caused complex engineering problems. The bridge surfaces are neither straight, level, nor flat and rustic log work has great variation in quality. Logs were selected from nearby, cut to fit, seasoned, then put in place.
With the completion of the bridges more scenic beauty of the Black Hills became available for all people to enjoy.
C.C. Gideon turned vision into reality.
Erected 1991 by The Gideon Family, The South Dakota State Historical Society and The South Dakota Department of Transportation. (Marker Number 536.)
Location. 43° 52.168′ N, 103° 26.1′ W. Marker is near Keystone, South Dakota, in Custer County. Marker is on Iron Mountain Road (U.S. 16A) near Click for map. Marker is in this post office area: Keystone SD 57751, United States of America.
Other nearby markers. At least 8 other markers are within 2 miles of this marker, measured as the crow flies. Peter Norbeck (approx. ¾ mile away); Rushmore Workers (approx. 1.1 miles away); History of the United States of America (approx. 1.2 miles away); (Mount Rushmore) Chronology (approx. 1.2 miles away); The Power to Carve a Mountain (approx. 1.2 miles away); Theodore Roosevelt (approx. 1.3 miles away); George Washington (approx. 1.3 miles away); Abraham Lincoln (approx. 1.3 miles away). Click for a list of all markers in Keystone.
More about this marker. This marker is located on Iron Mountain Road, 2-3 miles south of the South Dakota Highway 244 intersection.
Categories. • Bridges & Viaducts •
Credits. This page originally submitted on , by Barry Swackhamer of San Jose, California. This page has been viewed 155 times since then and 70 times this year. Photos: 1, 2, 3, 4. submitted on , by Barry Swackhamer of San Jose, California. This page was last revised on June 16, 2016.