US Bridges

Geiger Road over Pinnebog River

Fair

Huron County, Michigan · Sec. 14-23 Oliver Twp. · Structure no. 000000000003631

Built
1925
100 years old, rebuilt 1979
Condition
Fair
inspected September 2023
Type
Tee Beam
Prestressed Concrete
Length
46 ft
1 main span
Daily traffic
100
2009 count
Owner
County
County Highway Agency

About this bridge

Geiger Road over Pinnebog River is a prestressed concrete tee beam carrying Geiger Road over Pinnebog River in Huron County, Michigan. It was built in 1925 and reconstructed in 1979, so it is 100 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 100 vehicles a day, roughly 1% of them trucks, projected to reach 180 by 2029. The structure is 46 ft (14 m) long and 30 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesGeiger Road
CrossesPinnebog River
LocationSec. 14-23 Oliver Twp.
RouteCounty Highway 0
CountyHuron County
StateMichigan
Coordinates43.80424, -83.16083
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating106 US tons
Inventory rating63.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length46 ft (14 m)
Longest span29 ft (8.8 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2009)
Projected traffic180 by 2029
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Geiger Road over Pinnebog River built?

It was built in 1925, making it 100 years old in 2025. It was reconstructed in 1979.

What condition is Geiger 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 September 2023.

How much traffic does Geiger Road over Pinnebog River carry?

About 100 vehicles per day (2009 count), of which roughly 1% are trucks.

How long is Geiger Road over Pinnebog River?

The structure is 46 ft (14 m) long with a longest span of 29 ft (8.8 m) and a deck 30 ft wide.

Who owns Geiger Road over Pinnebog River?

It is owned by the County Highway Agency.