US Bridges

Kilgore Road over S. Br. Pine River

Fair

St. Clair County, Michigan · Sec. 4 Wales Twp. · Structure no. 000000000010237

Built
1920
105 years old, rebuilt 1981
Condition
Fair
inspected December 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
122
2008 count
Owner
County
County Highway Agency

About this bridge

Kilgore Road over S. Br. Pine River is a prestressed concrete box beam or girders - multiple carrying Kilgore Road over S. Br. Pine River in St. Clair County, Michigan. It was built in 1920 and reconstructed in 1981, so it is 105 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 122 vehicles a day, roughly 3% of them trucks, projected to reach 219 by 2028. The structure is 40 ft (12.2 m) long and 21 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesKilgore Road
CrossesS. Br. Pine River
LocationSec. 4 Wales Twp.
RouteCounty Highway 0
CountySt. Clair County
StateMichigan
Coordinates42.98006, -82.69051
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.9 US tons
Inventory rating41.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length40 ft (12.2 m)
Longest span36 ft (11 m)
Deck width21 ft (6.5 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic122 (2008)
Projected traffic219 by 2028
Trucks3%
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 Kilgore Road over S. Br. Pine River built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1981.

What condition is Kilgore Road over S. Br. Pine 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 December 2023.

How much traffic does Kilgore Road over S. Br. Pine River carry?

About 122 vehicles per day (2008 count), of which roughly 3% are trucks.

How long is Kilgore Road over S. Br. Pine River?

The structure is 40 ft (12.2 m) long with a longest span of 36 ft (11 m) and a deck 21 ft wide.

Who owns Kilgore Road over S. Br. Pine River?

It is owned by the County Highway Agency.