N12 over STREAM


+42.60029, -96.76999
42°36'01" N, 96°46'12" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:N12 over STREAM
Structure number:S012 22928
Location:JCT N9/N12 5.9NW
Purpose:Carries highway over waterway
Route classification:Minor Arterial (Rural) [06]
Length of largest span:9.8 ft. [3.0 m]
Total length:30.8 ft. [9.4 m]
Owner:State Highway Agency [01]
Year built: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:3
Main spans material:Concrete [1]
Main spans design:Culvert [19]
Deck type:Not applicable [N]

Latest Available Inspection: September 2016 

Good/Fair/Poor Condition:Fair
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 and embankment protection is severely undermined. River control devices have severe damage. Large deposits of debris are in the channel. [4]
Pier/abutment protection:Navigation protection not required [1]
Culvert condition:Moderate to major deterioration or disintegration, extensive cracking and leaching or spalls on concrete or masonry walls and slabs. Minor settlement or misalignment. Noticeable scouring or erosion at curtain walls, wingwalls or pipes. Metal culverts have significant distortion and deflection in one section, significant corrosion or deep pitting. [5]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:46.9 tons [42.6 metric tons]
Inventory rating:36.0 tons [32.7 metric tons]
Sufficiency rating:81.3

Previous Inspections 

DateSuff. RatingConditionCulvert ConditionSD/FOADT
September 201681.3Fair5 out of 10-1340
September 201481.3Fair5 out of 10-1340
September 201273.9Fair5 out of 10-1505
September 201087.0Good8 out of 10-1235
September 200887.0Good8 out of 10-1235
September 200699.6Good9 out of 10-1340
March 200499.7Good9 out of 10-1250
August 200299.7Good9 out of 10-1255
February 200099.7Good9 out of 10-1120
March 199899.7Good9 out of 10-1120
March 199697.7Good9 out of 10-1060
April 199497.7Good9 out of 10-1030
March 199237.4FairN out of 10FO910
February 199054.6FairN out of 10-910