US Bridges

Coggins RD over I-75

Fair

Bay County, Michigan · 3.0 MI SW of Pinconning · Structure no. 000000000000638

Built
1968
57 years old, rebuilt 2011
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
216 ft
2 main spans
Daily traffic
818
1996 count
Owner
State
State Highway Agency

About this bridge

Coggins RD over I-75 is a steel continuous stringer/multi-beam or girder carrying Coggins RD over I-75 in Bay County, Michigan. It was built in 1968 and reconstructed in 2011, so it is 57 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 818 vehicles a day, roughly 3% of them trucks, projected to reach 450 by 1977. The structure is 216 ft (65.8 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesCoggins RD
CrossesI-75
Location3.0 MI SW of Pinconning
RouteCounty Highway 962
CountyBay County
StateMichigan
Coordinates43.80376, -84.02071
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
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 alignment7: Better than present minimum criteria
Operating rating62.8 US tons
Inventory rating37.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length216 ft (65.8 m)
Longest span107 ft (32.5 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic818 (1996)
Projected traffic450 by 1977
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 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 Coggins RD over I-75 built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2011.

What condition is Coggins RD over I-75 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 2023.

How much traffic does Coggins RD over I-75 carry?

About 818 vehicles per day (1996 count), of which roughly 3% are trucks.

How long is Coggins RD over I-75?

The structure is 216 ft (65.8 m) long with a longest span of 107 ft (32.5 m) and a deck 32 ft wide.

Who owns Coggins RD over I-75?

It is owned by the State Highway Agency.