M-3 CONN over I-75 & I-375

Map 

Facts 

Name:	M-3 CONN over I-75 & I-375
Structure number:	82182251000S081
Location:	IN DETROIT OVER I-375
Purpose:	Carries highway over highway
Route classification:	Principal Arterial - Other Freeways or Expressways (Urban) [12]
Length of largest span:	78.7 ft. [24.0 m]
Total length:	361.9 ft. [110.3 m]
Roadway width between curbs:	44.0 ft. [13.4 m]
Deck width edge-to-edge:	47.2 ft. [14.4 m]
Vertical clearance below bridge:	16.1 ft. [4.9 m]
Skew angle:	12°
Owner:	State Highway Agency [01]
Year built:	1964
Year reconstructed:	1998
Historic significance:	Bridge is not eligible for the National Register of Historic Places [5]
Design load:	MS 18+Mod / HS 20+Mod [6]
Number of main spans:	7
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:	22,748 [as of 2007]
Deck condition:	Very Good [8 out of 9]
Superstructure condition:	Satisfactory [6 out of 9]
Substructure condition:	Good [7 out of 9]
Scour condition:	Bridge not over waterway. [N]
Operating rating:	83.2 tons [75.6 metric tons]
Inventory rating:	49.5 tons [45.0 metric tons]
Sufficiency rating:	99.0

2000 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	13,480 [as of 1982]
Truck traffic:	3% of total traffic
Deck condition:	Serious [3 out of 9]
Superstructure condition:	Fair [5 out of 9]
Substructure condition:	Serious [3 out of 9]
Pier/abutment protection:	Navigation protection not required [1]
Scour condition:	Bridge not over waterway. [N]
Operating rating:	83.2 tons [75.6 metric tons]
Inventory rating:	49.5 tons [45.0 metric tons]
Sufficiency rating:	42.0

1992 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	13,480 [as of 1982]
Deck condition:	Satisfactory [6 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:	40.6 tons [36.9 metric tons]
Evaluation:	Functionally obsolete [2]
Sufficiency rating:	95.0

Comments