US-12 over I-75 NB

Map 

Facts 

Name:	US-12 over I-75 NB
Structure number:	82182194000S190
Location:	IN DETROIT
Purpose:	Carries highway and pedestrian walkway over highway
Route classification:	Other Principal Arterial (Urban) [14]
Length of largest span:	107.0 ft. [32.6 m]
Total length:	229.0 ft. [69.8 m]
Roadway width between curbs:	93.8 ft. [28.6 m]
Deck width edge-to-edge:	113.2 ft. [34.5 m]
Vertical clearance below bridge:	13.8 ft. [4.2 m]
Skew angle:	48°
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:	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]

2010 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	13,147 [as of 2007]
Truck traffic:	10% of total traffic
Deck condition:	Very Good [8 out of 9]
Superstructure condition:	Satisfactory [6 out of 9]
Substructure condition:	Satisfactory [6 out of 9]
Scour condition:	Bridge not over waterway. [N]
Operating rating:	85.4 tons [77.6 metric tons]
Inventory rating:	50.4 tons [45.8 metric tons]
Evaluation:	Functionally obsolete [2]
Sufficiency rating:	75.0

2000 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	12,000 [as of 1995]
Truck traffic:	10% of total traffic
Deck condition:	Fair [5 out of 9]
Superstructure condition:	Fair [5 out of 9]
Substructure condition:	Fair [5 out of 9]
Pier/abutment protection:	Navigation protection not required [1]
Scour condition:	Bridge not over waterway. [N]
Operating rating:	76.2 tons [69.3 metric tons]
Inventory rating:	45.5 tons [41.4 metric tons]
Sufficiency rating:	62.0

1992 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	46,100 [as of 1982]
Deck condition:	Poor [4 out of 9]
Superstructure condition:	Very Good [8 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:	22.8 tons [20.7 metric tons]
Evaluation:	Structurally deficient [1]
Sufficiency rating:	60.0
Recommended work:	Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]

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