US Bridges

Kilmanagh Road over Pigeon River

Fair

Huron County, Michigan · Sec 36 Winsor Twp · Structure no. 000000000003674

Built
1993
32 years old
Condition
Fair
inspected September 2023
Type
Tee Beam
Prestressed Concrete
Length
66 ft
2 main spans
Daily traffic
200
2009 count
Owner
County
County Highway Agency

About this bridge

Kilmanagh Road over Pigeon River is a prestressed concrete tee beam carrying Kilmanagh Road over Pigeon River in Huron County, Michigan. It was built in 1993, so it is 32 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 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 200 vehicles a day, roughly 1% of them trucks, projected to reach 360 by 2029. The structure is 66 ft (20.1 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesKilmanagh Road
CrossesPigeon River
LocationSec 36 Winsor Twp
RouteCounty Highway 0
CountyHuron County
StateMichigan
Coordinates43.75847, -83.24453
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating31.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length66 ft (20.1 m)
Longest span31 ft (9.6 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2009)
Projected traffic360 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 Kilmanagh Road over Pigeon River built?

It was built in 1993, making it 32 years old in 2025.

What condition is Kilmanagh Road over Pigeon 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 Kilmanagh Road over Pigeon River carry?

About 200 vehicles per day (2009 count), of which roughly 1% are trucks.

How long is Kilmanagh Road over Pigeon River?

The structure is 66 ft (20.1 m) long with a longest span of 31 ft (9.6 m) and a deck 32 ft wide.

Who owns Kilmanagh Road over Pigeon River?

It is owned by the County Highway Agency.