I-75 over CONRAIL :RAISIN R: FRONT (Route: 75)
Num:7173x
Open: no restriction [A]
Built: 1955, Reconstructed: 2005
Historic: Bridge is on the NRHP. [1]

Google Streetview (If Available)

Rough Distance: 0 Miles (0.1 Kilometers)

Bridge Type
Main Span(s): Steel [3] Girder and floorbeam system [03]
Approach Span(s): Steel [3] Stringer/Multi-beam or girder [02]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Epoxy Overlay [5]

Bridge Dimensions
Length: 283.6 m = 930.5 ft
Main Spans: 3 at 48.1 m = 157.8 ft
Approach Spans: 8
Skew: 99
Width, Roadway: 32.7 m = 107.3 ft (6 Lanes) and Out-To-Out: 34.6 m = 113.5 ft for a 34.1 m = 111.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0.3 m = 1.0 ft

Location
Monroe [55020]: Monroe County [115], Michigan [26]
Owned by State Highway Agency [01], DOT District: 6
IN MONROE OVER FRONT ST

Condition
Deck: Satisfactory [6]
Superstructure: Fair [5]
Substructure: Fair [5]
Loading
Design: MS 18 / HS 20 [5]
Operating: 47 metric ton = 51.7 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 25.3 metric ton = 27.8 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])

Appraisal
Structural: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck Geometry: Superior to present desirable criteria [9]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Superior to present desirable criteria [9] and Bridge is scour critical; bridge foundations determined to be unstable. [3]
Inspections
Date: March 2020 [0320] and Frequency: 15

Future Work
Work Needed:
Bridge Detour: 1 km = 0.6 mi
Traffic
ADT: 67800 (2019) and Trucks: 25%
Future ADT: 74900 (In 2039 )

I-75 over NORFOLK SOUTHERN RR (Route: 75)
Num:7174x
Open: no restriction [A]
Built: 1955, Reconstructed: N/A [0000]
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.2 Miles (0.3 Kilometers)

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: Latex Concrete or similar additive [3]

Bridge Dimensions
Length: 59.6 m = 195.5 ft
Main Spans: 3 at 22.1 m = 72.5 ft
Approach Spans: 0
Skew: 30
Width, Roadway: 33.7 m = 110.6 ft (8 Lanes) and Out-To-Out: 35.7 m = 117.1 ft for a 34.1 m = 111.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A

Location
Monroe [55020]: Monroe County [115], Michigan [26]
Owned by State Highway Agency [01], DOT District: 6
IN MONROE

Condition
Deck: Satisfactory [6]
Superstructure: Fair [5]
Substructure: Satisfactory [6]
Loading
Design: MS 18 / HS 20 [5]
Operating: 91 metric ton = 100.1 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 54.4 metric ton = 59.8 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])

Appraisal
Structural: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck Geometry: Meets minimum tolerable limits to be left in place as is [4]
Road Alignment: Better than present minimum criteria [7]
Waterway: N/A [N] and Bridge not over waterway. [N]
Inspections
Date: June 1999 [699] and Frequency: 24

Future Work
Work Needed:
Bridge Detour: 1 km = 0.6 mi
Traffic
ADT: 63962 (2007) and Trucks: 22%
Future ADT: 74644 (In 2018 )

I-75 over CN: GTW & NS RR'S (Route: 75)
Num:7172x
Open: no restriction [A]
Built: 1954, Reconstructed: 1989
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.4 Miles (0.6 Kilometers)

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: Latex Concrete or similar additive [3]

Bridge Dimensions
Length: 51.8 m = 170.0 ft
Main Spans: 4 at 13.1 m = 43.0 ft
Approach Spans: 0
Skew: 0
Width, Roadway: 34.3 m = 112.5 ft (7 Lanes) and Out-To-Out: 35.4 m = 116.1 ft for a 33.5 m = 109.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A

Location
Monroe [55020]: Monroe County [115], Michigan [26]
Owned by State Highway Agency [01], DOT District: 6
IN MONROE

Condition
Deck: Satisfactory [6]
Superstructure: Satisfactory [6]
Substructure: Satisfactory [6]
Loading
Design: MS 18 / HS 20 [5]
Operating: 83.6 metric ton = 92.0 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 49.9 metric ton = 54.9 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: Superior to present desirable criteria [9]
Road Alignment: Better than present minimum criteria [7]
Waterway: N/A [N] and Bridge not over waterway. [N]
Inspections
Date: August 1999 [899] and Frequency: 24

Future Work
Work Needed: Bridge deck replacement with only incidental widening. [37]
Bridge Detour: 1 km = 0.6 mi
Traffic
ADT: 63766 (2007) and Trucks: 23%
Future ADT: 74284 (In 2018 )