Rating:
1 vote

20th Street Viaduct

Photos 

Distant View Of Viaduct, Looking North

Photo taken by Historic American Engineering Record

View photos at Library of Congress

BH Photo #135041

Map 

Facts 

Overview
Lost through truss and plate girder bridge over South Platte River and railyard on 20th Street in Denver
Location
Denver, Denver County, Colorado
Status
Replaced by new bridge
History
Built 1909-11; replaced 1994
Builders
- Herbert S. Crocker (Engineer)
- Milwaukee Bridge Co. of Milwaukee, Wisconsin (Superstructure)
Design
Warren through truss
Dimensions
Length of largest span: 166.0 ft.
Total length: 4,291.2 ft. (0.8 mi.)
Deck width: 34.1 ft.
Vertical clearance above deck: 17.1 ft.
Approximate latitude, longitude
+39.75833, -104.99667   (decimal degrees)
39°45'30" N, 104°59'48" W   (degrees°minutes'seconds")
Approximate UTM coordinates
13/500285/4400935 (zone/easting/northing)
Quadrangle map:
Commerce City
Inventory numbers
CDOT D-03-V-050 (Colorado Dept. of Transportation structure number)
CO D-03-V-050 (Colorado off-system bridge number)
BH 41273 (Bridgehunter.com ID)
Inspection (as of 11/1990)
Deck condition rating: Poor (4 out of 9)
Superstructure condition rating: Poor (4 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 2.0 (out of 100)
Average daily traffic (as of 1986)
14,659

Update Log 

  • March 8, 2009: Added by James Baughn

Sources 

  • James Baughn - webmaster [at] bridgehunter [dot] com
  • HAER CO-51 - Twentieth Street Viaduct, Spans Platte River Valley between Thirty-third Ave, Denver, Denver County, CO