US Bridges

Harrington Road over Black River

Fair

Sanilac County, Michigan · City of Croswell · Structure no. 000000000009671

Built
1929
96 years old, rebuilt 2000
Condition
Fair
inspected May 2023
Type
Tee Beam
Prestressed Concrete
Length
130 ft
2 main spans
Daily traffic
1,500
1990 count
Owner
City
City or Municipal Highway Agency

About this bridge

Harrington Road over Black River is a prestressed concrete tee beam carrying Harrington Road over Black River in Sanilac County, Michigan. It was built in 1929 and reconstructed in 2000, so it is 96 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 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 1,500 vehicles a day, roughly 10% of them trucks, projected to reach 2,000 by 2010. The structure is 130 ft (39.7 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHarrington Road
CrossesBlack River
LocationCity of Croswell
RouteCity Street 552
CountySanilac County
StateMichigan
Coordinates43.27895, -82.62331
Functional classUrban Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating66 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length130 ft (39.7 m)
Longest span65 ft (19.9 m)
Deck width40 ft (12.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (1990)
Projected traffic2,000 by 2010
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Harrington Road over Black River built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 2000.

What condition is Harrington Road over Black 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 May 2023.

How much traffic does Harrington Road over Black River carry?

About 1,500 vehicles per day (1990 count), of which roughly 10% are trucks.

How long is Harrington Road over Black River?

The structure is 130 ft (39.7 m) long with a longest span of 65 ft (19.9 m) and a deck 40 ft wide.

Who owns Harrington Road over Black River?

It is owned by the City or Municipal Highway Agency.