US-12 over I-75 NB


+42.33148, -83.08456
42°19'53" N, 83°05'04" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:US-12 over I-75 NB
Structure number:000000000011748
Old structure number:82182194000S190 (from 1992 edition)
Purpose:Carries highway and pedestrian walkway over highway
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:107.0 ft. [32.6 m]
Total length:229.0 ft. [69.8 m]
Roadway width between curbs:93.8 ft. [28.6 m]
Deck width edge-to-edge:113.2 ft. [34.5 m]
Vertical clearance below bridge:13.8 ft. [4.2 m]
Skew angle:48°
Owner:State Highway Agency [01]
Year built:1970
Year reconstructed:1998
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:Steel [3]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: May 2014 

Status:Open, no restriction [A]
Average daily traffic:13,147 [as of 2007]
Truck traffic:10% of total traffic
Deck condition:Very Good [8 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Underclearances appraisal:Basically intolerable requiring high priority of corrrective action [3]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Operating rating:85.4 tons [77.6 metric tons]
Inventory rating:50.4 tons [45.8 metric tons]
Evaluation:Functionally obsolete [2]
Sufficiency rating:75.0

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
May 201475.0Functionally obsoleteVery GoodSatisfactorySatisfactory13147
May 201275.0Functionally obsoleteVery GoodSatisfactorySatisfactory13147
June 201075.0Functionally obsoleteVery GoodSatisfactorySatisfactory13147
June 200875.0Functionally obsoleteVery GoodSatisfactorySatisfactory13147
June 200675.0Not deficientVery GoodSatisfactorySatisfactory11326
June 200475.0Not deficientSatisfactorySatisfactorySatisfactory12000
June 200275.0Not deficientVery GoodSatisfactorySatisfactory12000
May 200075.0Not deficientVery GoodSatisfactorySatisfactory12000
August 199862.0Not deficientFairFairFair12000
August 199663.3Functionally obsoleteSatisfactoryGoodGood46100
August 199460.0Structurally deficientPoorGoodGood46100
July 199260.0Structurally deficientPoorVery GoodGood46100
June 199060.0Structurally deficientPoorVery GoodGood46100