12TH ST over I-75

Map 

Facts 

Name:	12TH ST over I-75
Structure number:	82182195000S020
Location:	IN DETROIT
Purpose:	Carries highway and pedestrian walkway over highway
Route classification:	Minor Arterial (Urban) [16]
Length of largest span:	63.0 ft. [19.2 m]
Total length:	284.8 ft. [86.8 m]
Roadway width between curbs:	73.8 ft. [22.5 m]
Deck width edge-to-edge:	88.9 ft. [27.1 m]
Vertical clearance below bridge:	15.1 ft. [4.6 m]
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:	6
Main spans material:	Steel continuous [4]
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]

2010 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	9,270 [as of 1978]
Truck traffic:	3% of total traffic
Deck condition:	Fair [5 out of 9]
Superstructure condition:	Good [7 out of 9]
Substructure condition:	Good [7 out of 9]
Scour condition:	Bridge not over waterway. [N]
Inventory rating:	43.0 tons [39.1 metric tons]
Sufficiency rating:	92.7

2000 Inspection 

Status:	Open, temporary structure in place to carry legal loads [E]
Average daily traffic:	9,270 [as of 1978]
Truck traffic:	3% of total traffic
Deck condition:	Fair [5 out of 9]
Superstructure condition:	Good [7 out of 9]
Substructure condition:	Good [7 out of 9]
Pier/abutment protection:	Navigation protection not required [1]
Scour condition:	Bridge not over waterway. [N]
Inventory rating:	43.0 tons [39.1 metric tons]
Sufficiency rating:	92.6

1992 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	9,270 [as of 1978]
Deck condition:	Poor [4 out of 9]
Superstructure condition:	Good [7 out of 9]
Substructure condition:	Satisfactory [6 out of 9]
Pier/abutment protection:	Navigation protection not required [1]
Scour condition:	Bridge not over waterway. [N]
Inventory rating:	42.6 tons [38.7 metric tons]
Evaluation:	Structurally deficient [1]
Sufficiency rating:	93.5
Recommended work:	Bridge deck replacement with only incidental widening. [37]

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