US Bridges

South Street over US-127

Fair

Ingham County, Michigan · In Mason · Structure no. 000000000003712

Built
1967
58 years old, rebuilt 2014
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
180 ft
4 main spans
Daily traffic
700
2012 count
Owner
State
State Highway Agency

About this bridge

South Street over US-127 is a steel stringer/multi-beam or girder carrying South Street over US-127 in Ingham County, Michigan. It was built in 1967 and reconstructed in 2014, so it is 58 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 700 vehicles a day, roughly 2% of them trucks, projected to reach 850 by 2033. The structure is 180 ft (54.8 m) long and 38 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesSouth Street
CrossesUS-127
LocationIn Mason
RouteCity Street 0
Coordinates42.57491, -84.45719
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.8 US tons
Inventory rating32.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length180 ft (54.8 m)
Longest span55 ft (16.8 m)
Deck width38 ft (11.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic700 (2012)
Projected traffic850 by 2033
Trucks2%
Lanes on structure2
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 South Street over US-127 built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2014.

What condition is South Street over US-127 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 South Street over US-127 carry?

About 700 vehicles per day (2012 count), of which roughly 2% are trucks.

How long is South Street over US-127?

The structure is 180 ft (54.8 m) long with a longest span of 55 ft (16.8 m) and a deck 38 ft wide.

Who owns South Street over US-127?

It is owned by the State Highway Agency.