US Bridges

Rattle Run Road over Rattle Run Creek

Fair

St. Clair County, Michigan · Sec. 17 St. Clair Twp. · Structure no. 000000000010049

Built
1977
48 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
1,888
2001 count
Owner
County
County Highway Agency

About this bridge

Rattle Run Road over Rattle Run Creek is a prestressed concrete tee beam carrying Rattle Run Road over Rattle Run Creek in St. Clair County, Michigan. It was built in 1977, so it is 48 years old, younger 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 1,888 vehicles a day, roughly 5% of them trucks, projected to reach 3,400 by 2021. The structure is 40 ft (12.2 m) long and 36 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesRattle Run Road
CrossesRattle Run Creek
LocationSec. 17 St. Clair Twp.
RouteCounty Highway 7748
CountySt. Clair County
StateMichigan
Coordinates42.86352, -82.59669
Functional classRural Major Collector

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating67.1 US tons
Inventory rating40.3 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span36 ft (11 m)
Deck width36 ft (10.9 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,888 (2001)
Projected traffic3,400 by 2021
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Rattle Run Road over Rattle Run Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is Rattle Run Road over Rattle Run 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 November 2023.

How much traffic does Rattle Run Road over Rattle Run Creek carry?

About 1,888 vehicles per day (2001 count), of which roughly 5% are trucks.

How long is Rattle Run Road over Rattle Run Creek?

The structure is 40 ft (12.2 m) long with a longest span of 36 ft (11 m) and a deck 36 ft wide.

Who owns Rattle Run Road over Rattle Run Creek?

It is owned by the County Highway Agency.