I-75, INT'L BRIDGE over ST MARY RIV/PORTAGE AV W

Map 

Facts 

Name:	I-75, INT'L BRIDGE over ST MARY RIV/PORTAGE AV W
Structure number:	17117034000B010
Location:	IN SAULT STE MARIE
Purpose:	Carries highway over highway, waterway, and railroad
Route classification:	Principal Arterial - Interstate (Urban) [11]
Tolls:	Yes [1]
Length of largest span:	430.1 ft. [131.1 m]
Total length:	9280.6 ft. [2828.6 m]
Roadway width between curbs:	27.9 ft. [8.5 m]
Deck width edge-to-edge:	34.5 ft. [10.5 m]
Vertical clearance above deck:	18.0 ft. [5.5 m]
Vertical clearance below bridge:	124.0 ft. [37.8 m]
Owner:	State Toll Authority [31]
Year built:	1962
Historic significance:	Bridge is on the National Register of Historic Places [1]
Design load:	MS 18 / HS 20 [5]
Number of main spans:	8
Main spans material:	Steel continuous [4]
Main spans design:	Truss - Thru [10]
Deck type:	Concrete Cast-in-Place [1]
Wearing surface:	Low slump Concrete [4]

2010 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	5,242 [as of 2007]
Truck traffic:	9% of total traffic
Deck condition:	Satisfactory [6 out of 9]
Superstructure condition:	Good [7 out of 9]
Substructure condition:	Good [7 out of 9]
Channel protection:	Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7]
Pier/abutment protection:	Navigation protection not required [1]
Scour condition:	Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:	36.0 tons [32.7 metric tons]
Inventory rating:	36.0 tons [32.7 metric tons]
Sufficiency rating:	57.0
Recommended work:	Bridge deck rehabilitation with only incidental widening. [36]

2000 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	8,900 [as of 1995]
Truck traffic:	5% of total traffic
Deck condition:	Good [7 out of 9]
Superstructure condition:	Good [7 out of 9]
Substructure condition:	Good [7 out of 9]
Channel protection:	Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7]
Pier/abutment protection:	In place and functioning [2]
Scour condition:	Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:	36.0 tons [32.7 metric tons]
Inventory rating:	36.0 tons [32.7 metric tons]
Sufficiency rating:	54.0
Recommended work:	Bridge deck replacement with only incidental widening. [37]

1992 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	9,010 [as of 1990]
Truck traffic:	3% of total traffic
Deck condition:	Good [7 out of 9]
Superstructure condition:	Good [7 out of 9]
Substructure condition:	Good [7 out of 9]
Channel protection:	Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7]
Pier/abutment protection:	In place and functioning [2]
Operating rating:	76.2 tons [69.3 metric tons]
Inventory rating:	35.6 tons [32.4 metric tons]
Evaluation:	Functionally obsolete [2]
Sufficiency rating:	52.0
Recommended work:	Bridge deck replacement with only incidental widening. [37]
Estimated cost of work:	$3,464,000

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