US Bridges

Pinconning RD over I-75

Good

Bay County, Michigan · 2.7 MI W of Pinconning · Structure no. 000000000000639

Built
1968
57 years old, rebuilt 2011
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
216 ft
2 main spans
Daily traffic
4,188
1995 count
Owner
State
State Highway Agency

About this bridge

Pinconning RD over I-75 is a steel continuous stringer/multi-beam or girder carrying Pinconning 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,188 vehicles a day, roughly 3% of them trucks, projected to reach 4,816 by 2015. The structure is 216 ft (65.8 m) long and 36 ft wide.

CarriesPinconning RD
CrossesI-75
Location2.7 MI W of Pinconning
RouteCounty Highway 974
Coordinates43.85399, -84.02033
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length216 ft (65.8 m)
Longest span107 ft (32.5 m)
Deck width36 ft (11 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,188 (1995)
Projected traffic4,816 by 2015
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 Pinconning 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 Pinconning RD over I-75 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

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

About 4,188 vehicles per day (1995 count), of which roughly 3% are trucks.

How long is Pinconning 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 36 ft wide.

Who owns Pinconning RD over I-75?

It is owned by the State Highway Agency.