US Bridges

Porter ST over N Br Ecorse River

PoorPosted for load

Wayne County, Michigan · In Lincoln Park · Structure no. 000000000012503

Built
1948
77 years old, rebuilt 1960
Condition
Poor
inspected August 2024
Type
Tee Beam
Concrete
Length
30 ft
1 main span
Daily traffic
600
1984 count
Owner
City
City or Municipal Highway Agency

About this bridge

Porter ST over N Br Ecorse River is a concrete tee beam carrying Porter ST over N Br Ecorse River in Wayne County, Michigan. It was built in 1948 and reconstructed in 1960, so it is 77 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 600 vehicles a day, roughly 2% of them trucks, projected to reach 600 by 2010. The structure is 30 ft (9.1 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesPorter ST
CrossesN Br Ecorse River
LocationIn Lincoln Park
RouteCity Street 0
Coordinates42.26728, -83.1787
Functional classUrban Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating41.8 US tons
Inventory rating32.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width40 ft (12.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (1984)
Projected traffic600 by 2010
Trucks2%
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 Porter ST over N Br Ecorse River built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 1960.

What condition is Porter ST over N Br Ecorse River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does Porter ST over N Br Ecorse River carry?

About 600 vehicles per day (1984 count), of which roughly 2% are trucks.

How long is Porter ST over N Br Ecorse River?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 40 ft wide.

Who owns Porter ST over N Br Ecorse River?

It is owned by the City or Municipal Highway Agency.