Share:

US-12 over I-75 SB

Map 

Coordinates:
+42.33148, -83.08577
42°19'53" N, 83°05'09" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.

Facts 

Name:US-12 over I-75 SB
Structure number:000000000011749
Old structure number:82182194000S200 (from 1992 edition)
Location:IN DETROIT
Purpose:Carries highway and pedestrian walkway over highway
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:82.0 ft. [25.0 m]
Total length:188.0 ft. [57.3 m]
Roadway width between curbs:93.8 ft. [28.6 m]
Deck width edge-to-edge:112.2 ft. [34.2 m]
Vertical clearance below bridge:14.8 ft. [4.5 m]
Skew angle:34°
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+Mod / HS 20+Mod [6]
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:11,831 [as of 2007]
Truck traffic:10% of total traffic
Deck condition:Very Good [8 out of 9]
Superstructure condition:Very Good [8 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Better than present minimum criteria [7]
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:80.2 tons [72.9 metric tons]
Inventory rating:40.6 tons [36.9 metric tons]
Evaluation:Functionally obsolete [2]
Sufficiency rating:77.0

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
May 201477.0Functionally obsoleteVery GoodVery GoodGood11831
May 201277.0Functionally obsoleteVery GoodVery GoodGood11831
June 201077.0Functionally obsoleteVery GoodVery GoodGood11831
June 200877.0Functionally obsoleteVery GoodVery GoodGood11831
June 200677.0Not deficientVery GoodVery GoodGood12657
June 200477.0Not deficientVery GoodVery GoodGood12000
June 200277.0Not deficientVery GoodVery GoodGood12000
July 200077.0Not deficientExcellentVery GoodGood12000
August 199977.0Not deficientExcellentVery GoodGood12000
November 199832.0Not deficientSeriousFairSerious12000
June 199746.4Structurally deficientPoorFairPoor46100
August 199462.2Structurally deficientPoorGoodFair46100
July 199264.2Functionally obsoleteFairVery GoodFair46100
June 199064.2Functionally obsoleteFairVery GoodFair46100