Rating:
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Carns State Aid Bridge

Photos 

View Beside Truss Spans

From Historic Bridge Inventory

BH Photo #167546

Map 

Information From Historic Bridge Inventory 

From Historic Bridge Inventory By Clayton B. Fraser

After years of almost continuous repairs, the timber bridge over the Niobrara River at Carns was finally wrecked by ice in the winter of 1910. In 1911 the Brown and Keya Paha county boards applied for and received state assistance to build a new bridge that year. After some delay the Carns Bridge, composed of six, fifty-four-foot spans was completed in 1913. It ultimately proved too narrow for this crossing, however, and in 1962 one of the bridge's six spans, along with several hundred feet of approach, washed out. This span was replaced, and the bridge extended by the addition of two salvaged trusses. Although this latter construction has altered its appearance, the Carns State Aid Bridge is historically important as the oldest remaining structure built under Nebraska's state aid bridge program.

Facts 

Overview
Through truss bridge over Niobrara River on FAS 1895
Location
Rock County, Nebraska
Status
Open to traffic
History
Built 1912; Some Spans Replaced In 1962
Builder
- Lincoln Construction Co. of Lincoln, Nebraska
Design
Pin-connected Parker through truss with a Pin-connected Pratt through truss span and five closed spandrel deck arch spans.
Dimensions
Length of largest span: 174.9 ft.
Total length: 526.9 ft.
Deck width: 14.1 ft.
Vertical clearance above deck: 16.0 ft.
Recognition
Posted to the National Register of Historic Places on June 29, 1992
Also called
Niobrara River Bridge
Approximate latitude, longitude
+42.73245, -99.48135   (decimal degrees)
42°43'57" N, 99°28'53" W   (degrees°minutes'seconds")
Approximate UTM coordinates
14/460596/4731216 (zone/easting/northing)
Quadrangle map:
Carns
Inventory numbers
NRHP 92000722 (National Register of Historic Places reference number)
BH 24508 (Bridgehunter.com ID)
Inspection (as of 06/2015)
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: 11.7 (out of 100)
Average daily traffic (as of 2011)
35

Update Log 

  • October 7, 2016: New photo from Dave King
  • February 18, 2014: Photo imported by Dave King
  • June 14, 2010: Essay added by Nathan Holth

Sources