M-25 over SAGINAW RIVER & JFK DR (Route: 25)
Num:646x
Open: no restriction [A]
Built: 1958, Reconstructed: 2005
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.1 Miles (0.1 Kilometers)

Bridge Type
Main Span(s): Steel [3] Movable - Bascule [16]
Approach Span(s): Steel [3] Girder and floorbeam system [03]
Deck: Open Grating [3] with Wearing Surface: Epoxy Overlay [5]

Bridge Dimensions
Length: 260.3 m = 854.0 ft
Main Spans: 1 at 56.4 m = 185.0 ft
Approach Spans: 6
Skew: 0
Width, Roadway: 15.8 m = 51.8 ft (4 Lanes) and Out-To-Out: 20.6 m = 67.6 ft for a 17.1 m = 56.1 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0.3 m = 1.0 ft

Location
Bay City [06020]: Bay County [017], Michigan [26]
Owned by State Highway Agency [01], DOT District: 4
IN BAY CITY

Condition
Deck: Satisfactory [6]
Superstructure: Satisfactory [6]
Substructure: Satisfactory [6]
Loading
Design: MS 18 / HS 20 [5]
Operating: 58 metric ton = 63.8 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 34.7 metric ton = 38.2 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: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Waterway: Somewhat better than minimum adequacy to tolerate being left in place as is [5] and Bridge is scour critical; bridge foundations determined to be unstable. [3]
Inspections
Date: April 2020 [0420] and Frequency: 15

Future Work
Work Needed: Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Bridge Detour: 0.2 km = 0.1 mi
Traffic
ADT: 30724 (2018) and Trucks: 3%
Future ADT: 35333 (In 2038 )

M-25 over CM RR (Route: 25)
Num:649x
Open: no restriction [A]
Built: 1957, Reconstructed: 1993
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.3 Miles (0.5 Kilometers)

Bridge Type
Main Span(s): Prestressed concrete [5] Box beam or girders - Multiple [05]
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: 75.1 m = 246.4 ft
Main Spans: 5 at 16.3 m = 53.5 ft
Approach Spans: 0
Skew: 1
Width, Roadway: 15.8 m = 51.8 ft (4 Lanes) and Out-To-Out: 20.8 m = 68.2 ft for a 17.1 m = 56.1 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A

Location
Bay City [06020]: Bay County [017], Michigan [26]
Owned by State Highway Agency [01], DOT District: 4
IN BAY CITY

Condition
Deck: Very Good [8]
Superstructure: Satisfactory [6]
Substructure: Good [7]
Loading
Design: MS 22.5 / HS 25 or greater [9]
Operating: 65.4 metric ton = 71.9 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 39.2 metric ton = 43.1 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: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
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: 0.2 km = 0.1 mi
Traffic
ADT: 30724 (2018) and Trucks: 3%
Future ADT: 35333 (In 2038 )