US Bridges

Marlette RD over I-75 NB

Fair

Otsego County, Michigan · 1.5 MI N of Crawford Col · Structure no. 000000000008672

Built
1961
64 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
323 ft
5 main spans
Daily traffic
800
1988 count
Owner
State
State Highway Agency

About this bridge

Marlette RD over I-75 NB is a steel stringer/multi-beam or girder carrying Marlette RD over I-75 NB in Otsego County, Michigan. It was built in 1961, so it is 64 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 5 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 800 vehicles a day, projected to reach 700 by 1992. The structure is 323 ft (98.4 m) long and 32 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesMarlette RD
CrossesI-75 NB
Location1.5 MI N of Crawford Col
RouteCounty Highway 0
CountyOtsego County
StateMichigan
Coordinates44.87731, -84.68844
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating57.5 US tons
Inventory rating30.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length323 ft (98.4 m)
Longest span77 ft (23.5 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic800 (1988)
Projected traffic700 by 1992
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed18 mi (29 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 Marlette RD over I-75 NB built?

It was built in 1961, making it 64 years old in 2025.

What condition is Marlette RD 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 September 2024.

How much traffic does Marlette RD over I-75 NB carry?

About 800 vehicles per day (1988 count).

How long is Marlette RD over I-75 NB?

The structure is 323 ft (98.4 m) long with a longest span of 77 ft (23.5 m) and a deck 32 ft wide.

Who owns Marlette RD over I-75 NB?

It is owned by the State Highway Agency.