Rating:
5 votes

Keystone Interchange Bridge

Photos 

Photo taken by David Reynolds in June 2007

Enlarge

BH Photo #112734

Map 

Street Views 

Facts 

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

Update Log 

  • March 20, 2015: New photo from Irma Hale
  • October 13, 2010: New Street View added by Craig Philpott
  • September 30, 2009: New photos from David Backlin
  • March 4, 2008: New photos from Ruth Reynolds

Sources 

  • Ruth Reynolds - ruthmusic [at] yahoo [dot] com
  • David Backlin - us71 [at] cox [dot] net
  • Craig Philpott - craigphilpott63 [at] gmail [dot] com

Comments 

Keystone Interchange Bridge
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.