I-90 over SR 21


+47.09686, -118.66759
47°05'49" N, 118°40'03" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:I-90 over SR 21
Structure number:0009185D0000000
Location:15.5 E GRANT CO
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Rural) [01]
Length of largest span:62.0 ft. [18.9 m]
Total length:170.9 ft. [52.1 m]
Roadway width between curbs:38.1 ft. [11.6 m]
Deck width edge-to-edge:40.4 ft. [12.3 m]
Vertical clearance below bridge:17.1 ft. [5.2 m]
Owner:State Highway Agency [01]
Year built:1972
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18+Mod / HS 20+Mod [6]
Number of main spans:3
Main spans material:Prestressed concrete continuous [6]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Latex Concrete or similar additive [3]

Latest Available Inspection: July 2016 

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:4,811 [as of 2012]
Truck traffic:23% of total traffic
Deck condition:Satisfactory [6 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:Equal to present minimum criteria [6]
Underclearances appraisal:Superior to present desirable criteria [9]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Operating rating:73.3 tons [66.6 metric tons]
Inventory rating:43.6 tons [39.6 metric tons]
Sufficiency rating:97.6

Previous Inspections 

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
July 201697.6FairSatisfactoryGoodGood-4811
July 201497.6GoodGoodGoodGood-4811
July 201297.5GoodGoodGoodGood-4963
August 201097.6GoodGoodGoodGood-4829
September 200696.6GoodGoodGoodGood-4162
July 200297.6GoodGoodGoodGood-4162
April 200097.6GoodGoodGoodGood-4081
October 199897.6GoodGoodGoodGood-4081
April 199697.4GoodGoodGoodGood-4081
September 199497.4GoodGoodGoodGood-4081
June 199297.8GoodGoodGoodGood-3150