US Bridges

Moore Road over Pinnebog River

Good

Huron County, Michigan · Sec. 23-24 Oliver Twp. · Structure no. 000000000003635

Built
1985
40 years old
Condition
Good
inspected September 2023
Type
Tee Beam
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
75
2009 count
Owner
County
County Highway Agency

About this bridge

Moore Road over Pinnebog River is a prestressed concrete tee beam carrying Moore Road over Pinnebog River in Huron County, Michigan. It was built in 1985, so it is 40 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 75 vehicles a day, roughly 1% of them trucks, projected to reach 135 by 2029. The structure is 32 ft (9.7 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesMoore Road
CrossesPinnebog River
LocationSec. 23-24 Oliver Twp.
RouteCounty Highway 0
Coordinates43.7926, -83.14078
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating83.3 US tons
Inventory rating49.9 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length32 ft (9.7 m)
Longest span29 ft (8.8 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2009)
Projected traffic135 by 2029
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Moore Road over Pinnebog River built?

It was built in 1985, making it 40 years old in 2025.

What condition is Moore Road over Pinnebog River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does Moore Road over Pinnebog River carry?

About 75 vehicles per day (2009 count), of which roughly 1% are trucks.

How long is Moore Road over Pinnebog River?

The structure is 32 ft (9.7 m) long with a longest span of 29 ft (8.8 m) and a deck 32 ft wide.

Who owns Moore Road over Pinnebog River?

It is owned by the County Highway Agency.