US Bridges

Rattle Run RD over I-94

Fair

St. Clair County, Michigan · 5.1 MI SW of M-25 · Structure no. 000000000010005

Built
1964
61 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
220 ft
4 main spans
Daily traffic
1,200
1993 count
Owner
State
State Highway Agency

About this bridge

Rattle Run RD over I-94 is a steel stringer/multi-beam or girder carrying Rattle Run RD over I-94 in St. Clair County, Michigan. It was built in 1964, so it is 61 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 1,200 vehicles a day, roughly 2% of them trucks, projected to reach 1,380 by 2013. The structure is 220 ft (67.2 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesRattle Run RD
CrossesI-94
Location5.1 MI SW of M-25
RouteCounty Highway 7748
CountySt. Clair County
StateMichigan
Coordinates42.85143, -82.57286
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.7 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length220 ft (67.2 m)
Longest span73 ft (22.3 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (1993)
Projected traffic1,380 by 2013
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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 Rattle Run RD over I-94 built?

It was built in 1964, making it 61 years old in 2025.

What condition is Rattle Run RD over I-94 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 July 2024.

How much traffic does Rattle Run RD over I-94 carry?

About 1,200 vehicles per day (1993 count), of which roughly 2% are trucks.

How long is Rattle Run RD over I-94?

The structure is 220 ft (67.2 m) long with a longest span of 73 ft (22.3 m) and a deck 33 ft wide.

Who owns Rattle Run RD over I-94?

It is owned by the State Highway Agency.