Four Mile Bridge, Spanning Big Horn River on County Road No. 173, Thermopolis, Hot Springs County, WY
Photo Caption Pages
Spanning Big Horn River on County Road No. 173, Thermopolis vicinity, WY
Find maps of Thermopolis, WY
Documentation compiled after 1968.
Survey number HAER WY-59
Building/structure dates: 1928 initial construction
Significance: The Four Mile Bridge is one of only two rigid connected Pennsylvania Through trusses with substruts still functional on the state and county roads in Wyoming. With a simple span of 175 feet, it is the longer of the two. As such, it is an uncommon truss type for a highway bridge, more usually associated with railroad spans, and is one of Wyoming's more significant trusses.
Steel Truss Bridges
Smith, Charles M.
Wyoming State Highway Department
Historic American Engineering Record (Library of Congress)
1. VIEW LOOKING WEST TOWARD EAST WEB
2. VIEW LOOKING EAST TOWARD WEST WEB
3. STANDARD 175-FOOT STEEL TRUSS
4. STANDARD 175-FOOT STEEL TRUSS
5. STANDARD 175-FOOT STEEL TRUSS
6. STANDARD 60-FOOT STEEL TRUSS
7. STANDARD 95-FOOT LOW TRUSS
8. ABUTMENT AND PIER DETAILS
9. REVISED CONCRETE CAISSON PIER DETAIL
10. REVISED REINFORCED CONCRETE PIER DETAIL
11. REINFORCED CONCRETE ABUTMENT AND PIER
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