US Bridges

South Huron over I-275

Fair

Wayne County, Michigan · 1.9 MI SE of New Boston · Structure no. 000000000011899

Built
1974
51 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
295 ft
2 main spans
Daily traffic
4,791
1995 count
Owner
State
State Highway Agency

About this bridge

South Huron over I-275 is a steel stringer/multi-beam or girder carrying South Huron over I-275 in Wayne County, Michigan. It was built in 1974, so it is 51 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 4,791 vehicles a day, roughly 8% of them trucks, projected to reach 7,400 by 2017. The structure is 295 ft (89.9 m) long and 90 ft wide.

Location

Open in Google Maps
CarriesSouth Huron
CrossesI-275
Location1.9 MI SE of New Boston
RouteCounty Highway 8212
CountyWayne County
StateMichigan
Coordinates42.13724, -83.38169
Functional classRural Major 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating100 US tons
Inventory rating60 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length295 ft (89.9 m)
Longest span151 ft (46 m)
Deck width90 ft (27.5 m)
Roadway width81 ft (24.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,791 (1995)
Projected traffic7,400 by 2017
Trucks8%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$440,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was South Huron over I-275 built?

It was built in 1974, making it 51 years old in 2025.

What condition is South Huron over I-275 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 2024.

How much traffic does South Huron over I-275 carry?

About 4,791 vehicles per day (1995 count), of which roughly 8% are trucks.

How long is South Huron over I-275?

The structure is 295 ft (89.9 m) long with a longest span of 151 ft (46 m) and a deck 90 ft wide.

Who owns South Huron over I-275?

It is owned by the State Highway Agency.