Bridge Type
Main Span(s): Steel [3] Stringer/Multi-beam or girder [02]
Approach Span(s): Other [00]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Monolithic Concrete (concurrently placed with structural deck) [1]
Bridge Dimensions
Length: 50.3 m = 165.0 ft
Main Spans: 3 at 16.7 m = 54.8 ft
Approach Spans: 0
Skew: 30
Width, Roadway: 12.8 m = 42.0 ft (2 Lanes) and Out-To-Out: 13.4 m = 44.0 ft for a 11 m = 36.1 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Mastodon [52300]: Iron County [071], Michigan [26]
Owned by State Highway Agency [01], DOT District: 1
AT WISCONSIN STATE LINE
Condition
Deck: Good [7]
Superstructure: Good [7]
Substructure: Satisfactory [6]
Loading
Design: M 18 / H 20 [4]
Operating: 60.6 metric ton = 66.7 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 36.3 metric ton = 39.9 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: Equal to present minimum criteria [6]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Equal to present desirable criteria [8] and Countermeasures have been installed to mitigate an existing problem with scour. [7]
Inspections
Date: September 2020 [0920] and Frequency: 24
Future Work
Work Needed: Bridge deck replacement with only incidental widening. [37]
Bridge Detour: 9.2 km = 5.7 mi
Traffic
ADT: 3031 (2007) and Trucks: 12%
Future ADT: 2975 (In 2018
)