US Bridges

Jeddo Road over Black River

GoodPosted for load

St. Clair County, Michigan · Sec. 6 Grant Twp. · Structure no. 000000000010167

Built
1980
45 years old
Condition
Good
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
256 ft
4 main spans
Daily traffic
86
2021 count
Owner
County
County Highway Agency

About this bridge

Jeddo Road over Black River is a prestressed concrete stringer/multi-beam or girder carrying Jeddo Road over Black River in St. Clair County, Michigan. It was built in 1980, so it is 45 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. Its operating status is: posted for load restriction.

It carries about 86 vehicles a day, roughly 4% of them trucks, projected to reach 128 by 2041. The structure is 256 ft (78 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesJeddo Road
CrossesBlack River
LocationSec. 6 Grant Twp.
RouteCounty Highway 0
Coordinates43.15069, -82.62457
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.4 US tons
Inventory rating27.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length256 ft (78 m)
Longest span63 ft (19.3 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic86 (2021)
Projected traffic128 by 2041
Trucks4%
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 Jeddo Road over Black River built?

It was built in 1980, making it 45 years old in 2025.

What condition is Jeddo Road over Black 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 December 2024.

How much traffic does Jeddo Road over Black River carry?

About 86 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is Jeddo Road over Black River?

The structure is 256 ft (78 m) long with a longest span of 63 ft (19.3 m) and a deck 35 ft wide.

Who owns Jeddo Road over Black River?

It is owned by the County Highway Agency.