+40.20700, -90.77362
40°12'25" N, 90°46'25" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:IL 99 over SWAMP DITCH
Structure number:085201100000000
Old structure number:000085201125496 (from 1992 edition)
Location:1M S IL 101
Purpose:Carries highway over waterway
Route classification:Major Collector (Rural) [07]
Length of largest span:9.8 ft. [3.0 m]
Total length:23.0 ft. [7.0 m]
Owner:State Highway Agency [01]
Year built:1939
Year reconstructed:1990
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Number of main spans:2
Main spans material:Concrete [1]
Main spans design:Culvert [19]
Deck type:Not applicable [N]

Latest Available Inspection: April 2015

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:475 [as of 2015]
Truck traffic:14% of total traffic
Structural appraisal:Equal to present minimum criteria [6]
Water adequacy appraisal:Superior to present desirable criteria [9]
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]
Culvert condition:Deterioration or initial disintegration, minor chloride contamination, cracking with some leaching, or spalls on concrete or masonry walls and slabs. Local minor scouring at curtain walls, wingwalls or pipes. Metal culverts have a smooth curvature, non-symmetrical shape, significant corrosion or moderate pitting. [6]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:35.6 tons [32.4 metric tons]
Inventory rating:26.7 tons [24.3 metric tons]
Sufficiency rating:91.9

Previous Inspections

DateSuff. RatingConditionCulvert ConditionSD/FOADT
April 201591.9Fair6 out of 10-475
April 201392.0Fair6 out of 10-425
April 201191.9Fair6 out of 10-450
April 200991.9Fair6 out of 10-450
April 200791.8Fair6 out of 10-550
April 200592.0Fair6 out of 10-400
April 200391.8Fair6 out of 10-550
April 200192.4Fair6 out of 10-450
May 199992.3Fair6 out of 10-550
May 199792.3Fair6 out of 10-750
June 199590.3Fair6 out of 10-550
June 199390.3Fair6 out of 10-550
June 199192.3Fair6 out of 10-500