N12 over STREAM


+42.64503, -96.85622
42°38'42" N, 96°51'22" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:N12 over STREAM
Structure number:S012 22426
Purpose:Carries highway over waterway
Route classification:Minor Arterial (Rural) [06]
Length of largest span:7.9 ft. [2.4 m]
Total length:24.0 ft. [7.3 m]
Skew angle:45°
Owner:State Highway Agency [01]
Year built:1935
Year reconstructed:1994
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Number of main spans:2
Main spans material:Concrete [1]
Main spans design:Culvert [19]
Deck type:Not applicable [N]

Latest Available Inspection: September 2016 

Good/Fair/Poor Condition:Good
Status:Open, no restriction [A]
Average daily traffic:1,340 [as of 2012]
Truck traffic:9% of total traffic
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank protection is being eroded. River control devices and/or embankment have major damage. Trees and rush restrict the channel. [5]
Pier/abutment protection:Navigation protection not required [1]
Culvert condition:Shrinkage cracks, light scaling and insignificant spalling which does not expose reinforcing steel. Insignificant damage caused by drift with no misalignment and not requiring corrective action. Some minor scouring has occured near curtain walls, wingwalls or pipes. Metal culverts have a smooth symmetrical curvature with superficial corrosion and no pitting. [7]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:36.0 tons [32.7 metric tons]
Inventory rating:24.0 tons [21.8 metric tons]
Sufficiency rating:82.4

Previous Inspections 

DateSuff. RatingConditionCulvert ConditionSD/FOADT
September 201682.4Good7 out of 10-1340
September 201482.4Good7 out of 10-1340
September 201284.2Good8 out of 10-1505
September 201087.3Good8 out of 10-1235
September 200887.3Good8 out of 10-1235
September 200696.8Good8 out of 10-1340
March 200496.8Good8 out of 10-1250
September 200296.8Good8 out of 10-1255
February 200096.8Good8 out of 10-1120
March 199896.8Good8 out of 10-1120
March 199694.9Good8 out of 10-1060
April 199494.8Good8 out of 10-1060