US Bridges

M-25 over Saginaw River & Jfk DR

Fair

Bay County, Michigan · In Bay City · Structure no. 000000000000646

Built
1958
67 years old, rebuilt 2005
Condition
Fair
inspected April 2024
Type
Movable - Bascule
Steel
Length
854 ft
1 main span
Daily traffic
23,441
2021 count
Owner
State
State Highway Agency

About this bridge

M-25 over Saginaw River & Jfk DR is a steel movable - bascule carrying M-25 over Saginaw River & Jfk DR in Bay County, Michigan. It was built in 1958 and reconstructed in 2005, so it is 67 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 23,441 vehicles a day, roughly 3% of them trucks, projected to reach 35,333 by 2038. The structure is 854 ft (260.3 m) long and 68 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesM-25
CrossesSaginaw River & Jfk DR
LocationIn Bay City
RouteState Highway 25
CountyBay County
StateMichigan
Coordinates43.59615, -83.89252
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating63.9 US tons
Inventory rating38.3 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckOpen grating
Main spans1 (+6 approach)
Design loadHS 20
Structure length854 ft (260.3 m)
Longest span185 ft (56.4 m)
Deck width68 ft (20.6 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,441 (2021)
Projected traffic35,333 by 2038
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.6 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was M-25 over Saginaw River & Jfk DR built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2005.

What condition is M-25 over Saginaw River & Jfk DR in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does M-25 over Saginaw River & Jfk DR carry?

About 23,441 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is M-25 over Saginaw River & Jfk DR?

The structure is 854 ft (260.3 m) long with a longest span of 185 ft (56.4 m) and a deck 68 ft wide.

Who owns M-25 over Saginaw River & Jfk DR?

It is owned by the State Highway Agency.