US Bridges

14th ST over I-75

Fair

Wayne County, Michigan · In Detroit · Structure no. 000000000011760

Built
1970
55 years old, rebuilt 1994
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
330 ft
6 main spans
Daily traffic
15,000
1991 count
Owner
State
State Highway Agency

About this bridge

14th ST over I-75 is a steel stringer/multi-beam or girder carrying 14th ST over I-75 in Wayne County, Michigan. It was built in 1970 and reconstructed in 1994, so it is 55 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 15,000 vehicles a day, roughly 6% of them trucks, projected to reach 18,500 by 2015. The structure is 330 ft (100.5 m) long and 80 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries14th ST
CrossesI-75
LocationIn Detroit
RouteCity Street 2000
CountyWayne County
StateMichigan
Coordinates42.33217, -83.07695
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.8 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length330 ft (100.5 m)
Longest span68 ft (20.7 m)
Deck width80 ft (24.5 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,000 (1991)
Projected traffic18,500 by 2015
Trucks6%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 14th ST over I-75 built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1994.

What condition is 14th ST over I-75 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 October 2024.

How much traffic does 14th ST over I-75 carry?

About 15,000 vehicles per day (1991 count), of which roughly 6% are trucks.

How long is 14th ST over I-75?

The structure is 330 ft (100.5 m) long with a longest span of 68 ft (20.7 m) and a deck 80 ft wide.

Who owns 14th ST over I-75?

It is owned by the State Highway Agency.