US Bridges

Otto Road over I-69

Fair

Eaton County, Michigan · 1.5 MI NE of Charlotte · Structure no. 000000000002270

Built
1989
36 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
273 ft
2 main spans
Daily traffic
27,800
1982 count
Owner
State
State Highway Agency

About this bridge

Otto Road over I-69 is a prestressed concrete stringer/multi-beam or girder carrying Otto Road over I-69 in Eaton County, Michigan. It was built in 1989, so it is 36 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 27,800 vehicles a day, roughly 3% of them trucks, projected to reach 27,800 by 2007. The structure is 273 ft (83.2 m) long and 41 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesOtto Road
CrossesI-69
Location1.5 MI NE of Charlotte
RouteCounty Highway 0
CountyEaton County
StateMichigan
Coordinates42.58975, -84.79785
Functional classUrban 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 alignment8: Equal to present desirable criteria
Operating rating86.4 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length273 ft (83.2 m)
Longest span134 ft (40.7 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,800 (1982)
Projected traffic27,800 by 2007
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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 Otto Road over I-69 built?

It was built in 1989, making it 36 years old in 2025.

What condition is Otto Road 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 June 2023.

How much traffic does Otto Road over I-69 carry?

About 27,800 vehicles per day (1982 count), of which roughly 3% are trucks.

How long is Otto Road over I-69?

The structure is 273 ft (83.2 m) long with a longest span of 134 ft (40.7 m) and a deck 41 ft wide.

Who owns Otto Road over I-69?

It is owned by the State Highway Agency.