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Lime Springs vicinity

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Davis Bridge, Spanning Upper Iowa River at County Road 16, Lime Springs, Howard County, IA



B&W Photos


Data Pages


Photo Caption Pages


Item Title


Location
Spanning Upper Iowa River at County Road 16, Lime Springs vicinity, IA

Find maps of Lime Springs, IA


Created/Published
Documentation compiled after 1968.

Notes
Survey number HAER IA-35
Building/structure dates: 1879 initial construction
Significance: Built in 1879, the Davis Bridge was one of a handful of iron spans erected in Howard County following the failure of several early timber structures. It was fabricated and built by the Wrought Iron Bridge Company, perhaps the most prolific 19th century iron bridge fabricator in the country. The wrought iron composition and bowstring configuration of the Davis Bridge clearly place it in the milieu of 1870's bridge construction. But its pinned connections and boxed-channel arches are features more commonly associated with later truss technology. The Davis Bridge is thus distinguished as a transition between two mainstay 19th century wagon bridge types: the bolted bowstring arch-truss and the pinned Pratt truss. The oldest wagon bridge remaining in Howard County and one of the oldest in Iowa, the Davis Bridge is both historically and technologically significant to the development of bridge building in Iowa.

Subjects
Vehicular Bridges


Related Names
Wrought Iron Bridge Company


Collection
Historic American Engineering Record (Library of Congress)

Contents
Photograph caption(s): 
1. OVERALL VIEW OF BRIDGE AND UPPER IOWA RIVER, LOOKING SOUTH
2. OVERALL VIEW OF BRIDGE AND COUNTY ROAD 16, LOOKING WEST
3. OVERALL VIEW OF BRIDGE AND UPPER IOWA RIVER, LOOKING NORTHWEST
4. VIEW SHOWING EAST PORTAL OF BRIDGE, LOOKING WEST
5. VIEW SHOWING SOUTH WEB OF BRIDGE, LOOKING NORTHWEST
6. VIEW SHOWING WEST PORTAL OF BRIDGE, LOOKING EAST
7. UNDERSIDE VIEW OF BRIDGE, SHOWING FLOOR SYSTEM IN FOREGROUND AND CONCRETE-PARGED PIER IN BACKGROUND, LOOKING WEST
8. DETAIL VIEW OF WEST STONE PIER AND APPROACH, LOOKING SOUTHWEST
9. DETAIL VIEW OF BRIDGE DECK, SHOWING ARCHES, VERTICALS, GUARD RAILS AND WOOD DECKING, LOOKING WEST
10. DETAIL VIEW OF BRIDGE DECK, SHOWING TYPICAL VERTICAL/OUTRIDER, ARCH SEGMENT AND DIAGONALS, LOOKING NORTH
11. DETAIL VIEW OF BRIDGE DECK, SHOWING END-PANEL VERTICAL, ARCH SEGMENT, LOWER CHORD AND FLOOR SYSTEM, LOOKING NORTHEAST
12. DETAIL VIEW OF END-PANEL LOWER CHORD/VERTICAL CONNECTION, LOOKING NORTHEAST
13. DETAIL VIEW OF END-PANEL LOWER CHORD/VERTICAL CONNECTION, LOOKING SOUTH
14. DETAIL VIEW OF TYPICAL UPPER CHORD/VERTICAL CONNECTION, LOOKING NORTHEAST
15. DETAIL VIEW OF TYPICAL CAST-IRON BEARING SHOE, LOOKING NORTH
16. DETAIL VIEW OF TYPICAL LOWER CHORD SPLICE, LOOKING NORTHWEST
17. DETAIL VIEW OF TYPICAL LOWER CHORD/VERTICAL CONNECTION, LOOKING NORTHWEST
18. DETAIL VIEW OF TYPICAL DIAGONALS, SHOWING CONNECTION CLAMP, LOOKING NORTH


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