M-3 (GRATIOT) over I-94

Map

Coordinates:
+42.39136, -83.00639
42°23'29" 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:	13.8 ft. `[4.2 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]`
Operating rating:	88.1 tons `[80.1 metric tons]`
Inventory rating:	52.7 tons `[47.9 metric tons]`
Sufficiency rating:	47.0

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

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.

Element	Units	Quantity	1. Good	2. Fair	3. Poor	4. Serious
Superstructure
Steel Girder/Beam	linear ft.	5,648	1,130	1,412	1,412	1,694
Substructure
Reinforced Concrete Column	each	30	0	30	0	0
Reinforced Concrete Abutment	linear ft.	312	156	156	0	0
Reinforced Concrete Pier Cap	linear ft.	469	334	100	35	0
Joints
Strip Seal Joint	linear ft.	317	0	316	0	1
Pourable Joint	linear ft.	158	157	0	0	1
Compression Joint	linear ft.	317	0	0	317	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.	568	284	284	0	0
Deck
Reinforced Concrete Slab	sq. ft.	31,802	12,721	15,901	3,180	0
Wearing Surfaces	sq. ft.	25,606	11,523	12,803	1,280	0