N12 over STREAM


+42.53013, -96.69603
42°31'48" N, 96°41'46" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:N12 over STREAM
Structure number:S012 23640
Location:2.2SE PONCA
Purpose:Carries highway over waterway
Route classification:Minor Arterial (Rural) [06]
Length of largest span:44.0 ft. [13.4 m]
Total length:111.9 ft. [34.1 m]
Roadway width between curbs:40.0 ft. [12.2 m]
Deck width edge-to-edge:42.3 ft. [12.9 m]
Skew angle:15°
Owner:State Highway Agency [01]
Year built:1975
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 continuous [2]
Main spans design:Slab [01]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: September 2014 

Status:Open, no restriction [A]
Average daily traffic:2,175 [as of 2012]
Truck traffic:8% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Very Good [8 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Equal to present minimum criteria [6]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6]
Pier/abutment protection:Navigation protection not required [1]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:54.9 tons [49.9 metric tons]
Inventory rating:32.9 tons [29.9 metric tons]
Sufficiency rating:83.8

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
September 201483.8Not deficientFairFairVery Good2175
September 201285.3Not deficientFairFairVery Good2545
September 201096.4Not deficientSatisfactorySatisfactoryVery Good2100
September 200885.3Not deficientFairFairVery Good2100
August 200686.8Not deficientFairFairVery Good2180
March 200486.8Not deficientFairFairVery Good2000
August 200286.8Not deficientFairFairVery Good2150
February 200097.8Not deficientFairSatisfactoryVery Good1900
March 199897.8Not deficientFairSatisfactoryVery Good1900
March 199695.8Not deficientSatisfactoryVery GoodVery Good1675
March 199495.9Not deficientSatisfactoryVery GoodVery Good1600
March 199295.9Not deficientSatisfactoryVery GoodVery Good1640
February 199095.9Not deficientSatisfactoryVery GoodVery Good1640