+42.34724, -83.03568
42°20'50" N, 83°02'08" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:M-3 (GRATIOT AVE) over GTW RR
Structure number:000000000011326
Old structure number:82182072000R010 (from 1992 edition)
Purpose:Carries highway over railroad
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:44.0 ft. [13.4 m]
Total length:85.0 ft. [25.9 m]
Roadway width between curbs:89.9 ft. [27.4 m]
Deck width edge-to-edge:119.8 ft. [36.5 m]
Skew angle:34°
Owner:State Highway Agency [01]
Year built:1929
Year reconstructed:1970
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:M 18 / H 20 [4]
Number of main spans:2
Main spans material:Steel [3]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Integral Concrete (separate non-modified layer of concrete added to structural deck) [2]

Latest Available Inspection: September 2014 

Status:Open, no restriction [A]
Average daily traffic:19,649 [as of 2007]
Truck traffic:6% of total traffic
Deck condition:Poor [4 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry 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:64.9 tons [59.0 metric tons]
Inventory rating:38.8 tons [35.3 metric tons]
Evaluation:Structurally deficient [1]
Sufficiency rating:85.5

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
September 201485.5Structurally deficientPoor-Satisfactory19649
September 201245.6Structurally deficientPoor-Satisfactory19649
September 201037.6Functionally obsoleteFairFairGood19649
September 200837.6Functionally obsoleteFairFairGood19649
September 200638.6Functionally obsoleteSatisfactoryFairGood20529
December 200535.6Structurally deficientPoorFairFair20529
September 200335.6Structurally deficientPoorFairFair33000
September 200135.6Structurally deficientPoorFairFair33000
September 199931.6Structurally deficientPoorFairFair33000
October 199731.6Structurally deficientPoorFairFair33000
October 199533.3Functionally obsoleteFairSatisfactoryFair23800
December 199344.3Functionally obsoleteGoodSatisfactorySatisfactory23800
June 199151.4Functionally obsoleteGoodSatisfactorySatisfactory23800