IA 38 over I-80


+42.08056, -91.19444
42°04'50" N, 91°11'40" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:IA 38 over I-80
Structure number:000000000018330
Location:At N Jct. of I-80
Purpose:Carries highway overpass over highway
Route classification:Minor Arterial (Rural) [06]
Length of largest span:74.2 ft. [22.6 m]
Total length:266.1 ft. [81.1 m]
Roadway width between curbs:27.9 ft. [8.5 m]
Deck width edge-to-edge:34.1 ft. [10.4 m]
Vertical clearance below bridge:16.4 ft. [5.0 m]
Skew angle:34°
Owner:State Highway Agency [01]
Year built:1960
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:M 18 / H 20 [4]
Number of main spans:4
Main spans material:Steel continuous [4]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Low slump Concrete [4]

Latest Available Inspection: October 2016

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:3,130 [as of 2015]
Truck traffic:15% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Fair [5 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Meets minimum tolerable limits to be left in place as is [4]
Underclearances appraisal:Basically intolerable requiring high priority of corrrective action [3]
Roadway alignment appraisal:Equal to present minimum criteria [6]
Scour condition:Bridge not over waterway. [N]
Operating rating:37.4 tons [34.0 metric tons]
Inventory rating:22.4 tons [20.4 metric tons]
Sufficiency rating:48.3

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
October 201648.3FairFairFairFairFO3130
June 201538.5FairFairFairFairFO3020
June 201341.0FairFairFairFairFO2410
June 201141.0FairFairFairFairFO2380
June 200941.6FairFairFairFairFO2200
June 200755.3FairFairFairFairFO2230
October 200555.5FairFairFairFairFO2200
November 200355.7FairFairFairFairFO2150
November 200160.0FairSatisfactorySatisfactorySatisfactoryFO2120
July 199960.2FairSatisfactorySatisfactorySatisfactoryFO2080
May 199758.4FairSatisfactorySatisfactorySatisfactoryFO2070
August 199560.2FairSatisfactorySatisfactorySatisfactoryFO1920
July 199361.9FairSatisfactorySatisfactorySatisfactory-2080
August 199165.9FairSatisfactorySatisfactorySatisfactory-1950

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Steel Girder/Beamlinear ft.9983395071520
Steel Protective Coatingsq. ft.8,6083,4684,2508900
Reinforced Concrete Decksq. ft.9,0446,5442,420800
Wearing Surfacessq. ft.7,4482,3634,1509350
Reinforced Concrete Columneach32100
Reinforced Concrete Abutmentlinear ft.85236200
Reinforced Concrete Pier Caplinear ft.110713900
Pourable Jointlinear ft.3400034
Movable Bearingeach1601240
Fixed Bearingeach40040
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.5321461202660