US Bridges

Filion Road over Pinnebog River

Fair

Huron County, Michigan · Sec. 14-23 Chandler Twp. · Structure no. 000000000003521

Built
1994
31 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
100 ft
3 main spans
Daily traffic
920
2009 count
Owner
County
County Highway Agency

About this bridge

Filion Road over Pinnebog River is a prestressed concrete tee beam carrying Filion Road over Pinnebog River in Huron County, Michigan. It was built in 1994, so it is 31 years old, younger 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 920 vehicles a day, projected to reach 1,660 by 2029. The structure is 100 ft (30.4 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFilion Road
CrossesPinnebog River
LocationSec. 14-23 Chandler Twp.
RouteCounty Highway 3258
CountyHuron County
StateMichigan
Coordinates43.89108, -83.15461
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating41.8 US tons
Inventory rating32.2 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length100 ft (30.4 m)
Longest span33 ft (10 m)
Deck width36 ft (11.1 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic920 (2009)
Projected traffic1,660 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Filion Road over Pinnebog River built?

It was built in 1994, making it 31 years old in 2025.

What condition is Filion Road over Pinnebog 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 Filion Road over Pinnebog River carry?

About 920 vehicles per day (2009 count).

How long is Filion Road over Pinnebog River?

The structure is 100 ft (30.4 m) long with a longest span of 33 ft (10 m) and a deck 36 ft wide.

Who owns Filion Road over Pinnebog River?

It is owned by the County Highway Agency.