US Bridges

Summit ST over Shantee Creek

Fair

Monroe County, Michigan · 0.2 Miles N of State Line · Structure no. 000000000007229

Built
1936
89 years old, rebuilt 1978
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
55 ft
1 main span
Daily traffic
3,680
2022 count
Owner
County
County Highway Agency

About this bridge

Summit ST over Shantee Creek is a steel stringer/multi-beam or girder carrying Summit ST over Shantee Creek in Monroe County, Michigan. It was built in 1936 and reconstructed in 1978, so it is 89 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 3,680 vehicles a day, roughly 9% of them trucks, projected to reach 4,200 by 2042. The structure is 55 ft (16.8 m) long and 64 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesSummit ST
CrossesShantee Creek
Location0.2 Miles N of State Line
RouteCounty Highway 5851
CountyMonroe County
StateMichigan
Coordinates41.73473, -83.47982
Functional classUrban Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating94.2 US tons
Inventory rating56.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length55 ft (16.8 m)
Longest span52 ft (16 m)
Deck width64 ft (19.5 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,680 (2022)
Projected traffic4,200 by 2042
Trucks9%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Summit ST over Shantee Creek built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1978.

What condition is Summit ST over Shantee Creek 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 September 2024.

How much traffic does Summit ST over Shantee Creek carry?

About 3,680 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is Summit ST over Shantee Creek?

The structure is 55 ft (16.8 m) long with a longest span of 52 ft (16 m) and a deck 64 ft wide.

Who owns Summit ST over Shantee Creek?

It is owned by the County Highway Agency.