SH 56 Izard County over KNOB CREEK


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:SH 56 Izard County over KNOB CREEK
Structure number:000000000002310
Location:.1 M W OF SH 9
Purpose:Carries highway over waterway
Route classification:Minor Arterial (Rural) [06]
Length of largest span:16.1 ft. [4.9 m]
Total length:59.1 ft. [18.0 m]
Roadway width between curbs:32.2 ft. [9.8 m]
Deck width edge-to-edge:34.1 ft. [10.4 m]
Owner:State Highway Agency [01]
Year built:1949
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:M 13.5 / H 15 [2]
Number of main spans:4
Main spans material:Concrete [1]
Main spans design:Culvert [19]
Deck type:Not applicable [N]

Latest Available Inspection: August 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:1,800 [as of 2014]
Truck traffic:1% of total traffic
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry 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:Better than present minimum criteria [7]
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]
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]
Sufficiency rating:63.9

Previous Inspections

DateConditionCulvert ConditionADTSuff. Rating
August 2018Fair5 out of 10180063.9
August 2016Fair6 out of 10190074.6
August 2014Fair6 out of 10190067.9
August 2012Fair6 out of 10180068.2
August 2010Fair6 out of 10180068.2
August 2008Fair6 out of 10180068.2
September 2006Fair6 out of 10190067.9
September 2004Fair6 out of 10210066.1
October 2002Fair6 out of 10200067.3
October 2000Fair6 out of 10160068.7
October 1998Fair6 out of 10160068.7
October 1996Fair6 out of 1069073.0
October 1994Fair6 out of 1069073.0
October 1992Fair6 out of 1069073.0
October 1990Fair6 out of 10180768.0

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Reinforced Concrete Culvertlinear ft.136317980
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.118011800
Steel Protective Coatingsq. ft.3543040500