ILL 16 & 100 over AUTEN DITCH


+39.13769, -90.57168
39°08'16" N, 90°34'18" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:ILL 16 & 100 over AUTEN DITCH
Structure number:042000300000000
Old structure number:000042000309875 (from 1992 edition)
Location:1.6 MI SE CALHOUN CO
Purpose:Carries highway over waterway
Route classification:Minor Arterial (Rural) [06]
Length of largest span:36.1 ft. [11.0 m]
Total length:102.0 ft. [31.1 m]
Roadway width between curbs:36.1 ft. [11.0 m]
Deck width edge-to-edge:36.1 ft. [11.0 m]
Skew angle:27°
Owner:State Highway Agency [01]
Year built:1965
Year reconstructed:1996
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:Prestressed concrete [5]
Main spans design:Box beam or girders - Multiple [05]
Deck type:Concrete Precast Panels [2]
Wearing surface:Integral Concrete (separate non-modified layer of concrete added to structural deck) [2]

Latest Available Inspection: July 2016

Good/Fair/Poor Condition:Good
Status:Open, no restriction [A]
Average daily traffic:2,500 [as of 2015]
Truck traffic:12% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Better than present minimum criteria [7]
Deck geometry appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Water adequacy appraisal:Equal to present minimum criteria [6]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:69.9 tons [63.5 metric tons]
Inventory rating:43.5 tons [39.5 metric tons]
Sufficiency rating:92.0

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
July 201692.0GoodGoodGoodGood-2500
June 201492.7GoodVery GoodVery GoodVery Good-2250
June 201292.0GoodVery GoodVery GoodGood-2500
June 201092.2GoodVery GoodVery GoodGood-2450
June 200692.2GoodVery GoodVery GoodGood-2450
March 200591.2GoodVery GoodVery GoodGood-2800
March 200391.2GoodVery GoodVery GoodGood-2800
June 200191.1GoodExcellentExcellentGood-2850
June 199990.9GoodExcellentExcellentGood-2900
February 199991.8GoodExcellentExcellentGood-2600
June 199791.8GoodExcellentExcellentGood-2600
February 199737.0PoorPoorSeriousSatisfactory-2500
February 199640.0PoorFairSeriousGoodSD2500
March 199540.0PoorFairSeriousGoodSD2900
February 199440.0PoorFairSeriousSatisfactorySD2900
January 199240.0PoorFairSeriousGoodSD2950

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Prestressed Concrete Closed Web/Box Girderlinear ft.927927000
Reinforced Concrete Decksq. ft.3,7083,50820000
Reinforced Concrete Columneach88000
Reinforced Concrete Abutmentlinear ft.8181000
Reinforced Concrete Pier Caplinear ft.22318320200
Compression Jointlinear ft.162016200
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.206020600