US Bridges

30th ST over I-94

Fair

Wayne County, Michigan · In Detroit · Structure no. 000000000011178

Built
1951
74 years old, rebuilt 1996
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
178 ft
4 main spans
Daily traffic
6,000
1994 count
Owner
State
State Highway Agency

About this bridge

30th ST over I-94 is a steel stringer/multi-beam or girder carrying 30th ST over I-94 in Wayne County, Michigan. It was built in 1951 and reconstructed in 1996, so it is 74 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 6,000 vehicles a day, roughly 2% of them trucks, projected to reach 6,000 by 2014. The structure is 178 ft (54.2 m) long and 68 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries30th ST
CrossesI-94
LocationIn Detroit
RouteCity Street 0
CountyWayne County
StateMichigan
Coordinates42.34303, -83.11512
Functional classUrban 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.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating63.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length178 ft (54.2 m)
Longest span58 ft (17.6 m)
Deck width68 ft (20.6 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,000 (1994)
Projected traffic6,000 by 2014
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 km)
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 30th ST over I-94 built?

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 1996.

What condition is 30th ST over I-94 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 June 2024.

How much traffic does 30th ST over I-94 carry?

About 6,000 vehicles per day (1994 count), of which roughly 2% are trucks.

How long is 30th ST over I-94?

The structure is 178 ft (54.2 m) long with a longest span of 58 ft (17.6 m) and a deck 68 ft wide.

Who owns 30th ST over I-94?

It is owned by the State Highway Agency.