Keystone Interchange Bridge

Photos

Photo taken by David Reynolds in June 2007

BH Photo #112734

Overview: Wooden arch bridge on US 16A
Location: Pennington County, South Dakota
Status: Open to traffic
History: Built 1968
Design: Wooden open-spandrel arch
Dimensions: Length of largest span: 154.9 ft.
Total length: 290.0 ft.
Deck width: 25.9 ft.
Approximate latitude, longitude: +43.92500, -103.44278 (decimal degrees)
43°55'30" N, 103°26'34" W (degrees°minutes'seconds")
Approximate UTM coordinates: 13/625006/4864721 (zone/easting/northing)
Quadrangle map:: Mount Rushmore
Average daily traffic (as of 2015): 1,877
Inventory numbers: SD 52-308-412 (South Dakota structure number)
BH 32303 (Bridgehunter.com ID)
Inspection report (as of May 2016): Overall condition: Fair
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Deck condition rating: Fair (5 out of 9)
Sufficiency rating: 93 (out of 100)
View more at BridgeReports.com

Posted October 14, 2010, by Anthony Dillon (spansaver [at] hotmail [dot] com)

Very unique indeed! Beats the heck out of a slab!!

Keystone Interchange Bridge

Posted October 13, 2010, by Craig Philpott (cphilpott [at] puc [dot] edu)

This wooden interchange from 1968 is so exceptional and I wonder if there are any other such wooden structures.