US Bridges

US-2 over Big Fishdam River

Fair

Delta County, Michigan · 1.5 MI NE of Isabella · Structure no. 000000000002095

Built
1936
89 years old, rebuilt 1984
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
60 ft
1 main span
Daily traffic
3,462
2007 count
Owner
State
State Highway Agency

About this bridge

US-2 over Big Fishdam River is a steel stringer/multi-beam or girder carrying US-2 over Big Fishdam River in Delta County, Michigan. It was built in 1936 and reconstructed in 1984, so it is 89 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 6 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 3,462 vehicles a day, roughly 14% of them trucks, projected to reach 6,463 by 2018. The structure is 60 ft (18.3 m) long and 39 ft wide. If it were closed, the detour would be 55.3 mi (89 km).

Location

Open in Google Maps
CarriesUS-2
CrossesBig Fishdam River
Location1.5 MI NE of Isabella
RouteU.S. Route 2
CountyDelta County
StateMichigan
Coordinates45.90262, -86.57734
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating91.4 US tons
Inventory rating54.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span59 ft (17.9 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,462 (2007)
Projected traffic6,463 by 2018
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed55.3 mi (89 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US-2 over Big Fishdam River built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1984.

What condition is US-2 over Big Fishdam River 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 August 2023.

How much traffic does US-2 over Big Fishdam River carry?

About 3,462 vehicles per day (2007 count), of which roughly 14% are trucks.

How long is US-2 over Big Fishdam River?

The structure is 60 ft (18.3 m) long with a longest span of 59 ft (17.9 m) and a deck 39 ft wide.

Who owns US-2 over Big Fishdam River?

It is owned by the State Highway Agency.