US Bridges

Greenwood Road over I-75 NB

Fair

Ogemaw County, Michigan · 7.0 MI S of West Branch · Structure no. 000000000008425

Built
1970
55 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
512 ft
7 main spans
Daily traffic
2,188
1997 count
Owner
State
State Highway Agency

About this bridge

Greenwood Road over I-75 NB is a steel stringer/multi-beam or girder carrying Greenwood Road over I-75 NB in Ogemaw County, Michigan. It was built in 1970, so it is 55 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 2,188 vehicles a day, roughly 3% of them trucks, projected to reach 900 by 1998. The structure is 512 ft (156.2 m) long and 38 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesGreenwood Road
CrossesI-75 NB
Location7.0 MI S of West Branch
RouteCounty Highway 6504
CountyOgemaw County
StateMichigan
Coordinates44.17628, -84.17228
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionOctober 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 alignment6: Equal to present minimum criteria
Operating rating69.3 US tons
Inventory rating41.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans7
Design loadH 15
Structure length512 ft (156.2 m)
Longest span96 ft (29.4 m)
Deck width38 ft (11.7 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,188 (1997)
Projected traffic900 by 1998
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed11.2 mi (18 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 Greenwood Road over I-75 NB built?

It was built in 1970, making it 55 years old in 2025.

What condition is Greenwood Road over I-75 NB 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 October 2023.

How much traffic does Greenwood Road over I-75 NB carry?

About 2,188 vehicles per day (1997 count), of which roughly 3% are trucks.

How long is Greenwood Road over I-75 NB?

The structure is 512 ft (156.2 m) long with a longest span of 96 ft (29.4 m) and a deck 38 ft wide.

Who owns Greenwood Road over I-75 NB?

It is owned by the State Highway Agency.