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Nearby Bridges in NBI 2021: 1


I-75: INT'L BRIDGE over ST MARY RIV/PORTAGE AV W (Route: 75)
Num:1582x
Posted for load [P]
Built: 1962, Reconstructed: N/A [0000]
Historic: Bridge is on the NRHP. [1]

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Rough Distance: 0 Miles (0 Kilometers)

Bridge Type
Main Span(s): Steel continuous [4] Truss - Thru [10]
Approach Span(s): Steel continuous [4] Girder and floorbeam system [03]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Low slump Concrete [4]
Bridge Dimensions
Length: 2828.6 m = 9280.6 ft
Main Spans: 8 at 131.1 m = 430.1 ft
Approach Spans: 55
Skew: 0
Width, Roadway: 8.5 m = 27.9 ft (2 Lanes) and Out-To-Out: 10.5 m = 34.5 ft for a 25.6 m = 84.0 ft approaching roadway.
Vertical Clearance: 5.18 m = 17.0 ft and Navigational Clearance: 37.8 m = 124.0 ft
Location
Sault Ste. Marie [71740]: Chippewa County [033], Michigan [26]
Owned by State Toll Authority [31], DOT District: 1
IN SAULT STE MARIE
Condition
Deck: Satisfactory [6]
Superstructure: Satisfactory [6]
Substructure: Satisfactory [6]
Loading
Design: MS 18 / HS 20 [5]
Operating: 52.5 metric ton = 57.8 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 31.4 metric ton = 34.5 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Appraisal
Structural: Equal to present minimum criteria [6]
Deck Geometry: Meets minimum tolerable limits to be left in place as is [4]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Equal to present desirable criteria [8] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: August 1999 [899] and Frequency: 24
Future Work
Work Needed:
Bridge Detour: 20 km = 12.4 mi
Traffic
ADT: 5242 (2007) and Trucks: 9%
Future ADT: 5701 (In 2018 )

Special Bridge Conditions Legend: R - Former location of relocated bridge. ! - At risk for demolition or destruction. X - Confirmed demolished or collapsed. S  - Dismantled and/or in storage. L -  Severe loss of historic integrity due to alteration.

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