US Bridges

Riley Center RD over I-69

Fair

St. Clair County, Michigan · 7.0 MI SE of Capac · Structure no. 000000000009951

Built
1982
43 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
333 ft
2 main spans
Daily traffic
1,030
1990 count
Owner
State
State Highway Agency

About this bridge

Riley Center RD over I-69 is a steel continuous stringer/multi-beam or girder carrying Riley Center RD over I-69 in St. Clair County, Michigan. It was built in 1982, so it is 43 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 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 1,030 vehicles a day, roughly 2% of them trucks, projected to reach 1,185 by 2010. The structure is 333 ft (101.5 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesRiley Center RD
CrossesI-69
Location7.0 MI SE of Capac
RouteCounty Highway 0
CountySt. Clair County
StateMichigan
Coordinates42.97982, -82.84328
Functional classRural Minor 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating103.2 US tons
Inventory rating61.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length333 ft (101.5 m)
Longest span169 ft (51.5 m)
Deck width46 ft (14 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,030 (1990)
Projected traffic1,185 by 2010
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 Riley Center RD over I-69 built?

It was built in 1982, making it 43 years old in 2025.

What condition is Riley Center RD over I-69 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 Riley Center RD over I-69 carry?

About 1,030 vehicles per day (1990 count), of which roughly 2% are trucks.

How long is Riley Center RD over I-69?

The structure is 333 ft (101.5 m) long with a longest span of 169 ft (51.5 m) and a deck 46 ft wide.

Who owns Riley Center RD over I-69?

It is owned by the State Highway Agency.