M-3 (GRATIOT) over I-94

Map

Coordinates:
+42.39154, -83.00627
42°23'30" N, 83°00'23" W

Source: National Bridge Inventory. Information not verified; use at your own risk.

Name:	M-3 (GRATIOT) over I-94
Structure number:	000000000011245
Old structure number:	82182025000S010 `(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:	104.0 ft. `[31.7 m]`
Total length:	284.1 ft. `[86.6 m]`
Roadway width between curbs:	89.9 ft. `[27.4 m]`
Deck width edge-to-edge:	111.9 ft. `[34.1 m]`
Vertical clearance below bridge:	13.1 ft. `[4.0 m]`
Skew angle:	45°
Owner:	State Highway Agency `[01]`
Year built:	1958
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:	4
Main spans material:	Steel `[3]`
Main spans design:	Stringer/Multi-beam or girder `[02]`
Deck type:	Concrete Cast-in-Place `[1]`
Wearing surface:	Latex Concrete or similar additive `[3]`

Good/Fair/Poor Condition:	Poor
Status:	Open, no restriction `[A]`
Average daily traffic:	31,939 `[as of 2007]`
Truck traffic:	3% of total traffic
Deck condition:	Poor `[4 out of 9]`
Superstructure condition:	Poor `[4 out of 9]`
Substructure condition:	Satisfactory `[6 out of 9]`
Structural appraisal:	Meets minimum tolerable limits to be left in place as is `[4]`
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:	Better than present minimum criteria `[7]`
Scour condition:	Bridge not over waterway. `[N]`
Sufficiency rating:	47.0

Date	Condition	Deck	Superstructure	Substructure	ADT	Suff. Rating
October 2017	Poor	Poor	Poor	Satisfactory	31939	47.0
October 2016	Poor	Poor	Poor	Satisfactory	31939	47.0
October 2015	Poor	Serious	Poor	Satisfactory	31939	47.0
October 2014	Poor	Serious	Fair	Satisfactory	31939	62.0
November 2013	Poor	Serious	Fair	Satisfactory	31939	62.0
November 2012	Poor	Serious	Satisfactory	Satisfactory	31939	72.0
December 2011	Poor	Serious	Satisfactory	Good	31939	72.0
December 2010	Poor	Serious	Satisfactory	Good	31939	72.0
December 2009	Poor	Serious	Satisfactory	Good	31939	17.0
September 2008	Poor	Serious	Fair	Fair	31939	17.0
June 2007	Poor	Serious	Fair	Fair	33540	17.0
March 2006	Poor	Serious	Fair	Fair	33540	17.0
January 2005	Poor	Serious	Fair	Fair	27100	17.0
November 2003	Poor	Serious	Fair	Fair	27100	17.0
October 2002	Poor	Serious	Fair	Fair	27100	17.0
August 2001	Poor	Serious	Fair	Fair	27100	17.0
June 2000	Poor	Serious	Fair	Fair	27100	17.0
August 1999	Poor	Serious	Fair	Fair	27100	62.0
July 1998	Poor	Serious	Poor	Fair	27100	47.0
June 1997	Poor	Poor	Poor	Fair	27100	47.0
June 1994	Poor	Fair	Poor	Satisfactory	27100	49.0
June 1992	Poor	Fair	Poor	Satisfactory	27100	49.0
May 1990	Fair	Satisfactory	Satisfactory	Satisfactory	27100	77.0

Source: National Bridge Elements dataset, 2018 edition. This feature is experimental.

Element	Units	Quantity	1-Good	2-Fair	3-Poor	4-Serious
Superstructure
Steel Girder/Beam	linear ft.	18,531	9,199	4,633	4,633	66
Substructure
Reinforced Concrete Column	each	30	0	30	0	0
Reinforced Concrete Abutment	linear ft.	1,024	512	512	0	0
Reinforced Concrete Pier Cap	linear ft.	1,539	1,096	328	115	0
Joints
Strip Seal Joint	linear ft.	1,040	0	709	328	3
Pourable Joint	linear ft.	518	0	0	515	3
Compression Joint	linear ft.	1,040	0	0	1,040	0
Bearings
Movable Bearing	each	80	0	80	0	0
Fixed Bearing	each	80	0	80	0	0
Bridge Rail
Reinforced Concrete Bridge Rail	linear ft.	1,864	932	932	0	0
Deck
Reinforced Concrete Slab	sq. ft.	342,314	136,497	171,157	34,229	431
Wearing Surfaces	sq. ft.	275,621	123,602	137,810	13,778	431