US Bridges

Rondo RD over I-75 SB

Fair

Cheboygan County, Michigan · 6.2 MI S of M-68 · Structure no. 000000000001527

Built
1962
63 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
216 ft
3 main spans
Daily traffic
230
1997 count
Owner
State
State Highway Agency

About this bridge

Rondo RD over I-75 SB is a steel stringer/multi-beam or girder carrying Rondo RD over I-75 SB in Cheboygan County, Michigan. It was built in 1962, so it is 63 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 230 vehicles a day, roughly 3% of them trucks, projected to reach 400 by 2007. The structure is 216 ft (65.9 m) long and 31 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesRondo RD
CrossesI-75 SB
Location6.2 MI S of M-68
RouteCounty Highway 0
CountyCheboygan County
StateMichigan
Coordinates45.31669, -84.59632
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating74.3 US tons
Inventory rating44.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length216 ft (65.9 m)
Longest span73 ft (22.2 m)
Deck width31 ft (9.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic230 (1997)
Projected traffic400 by 2007
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 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 Rondo RD over I-75 SB built?

It was built in 1962, making it 63 years old in 2025.

What condition is Rondo RD over I-75 SB 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 April 2024.

How much traffic does Rondo RD over I-75 SB carry?

About 230 vehicles per day (1997 count), of which roughly 3% are trucks.

How long is Rondo RD over I-75 SB?

The structure is 216 ft (65.9 m) long with a longest span of 73 ft (22.2 m) and a deck 31 ft wide.

Who owns Rondo RD over I-75 SB?

It is owned by the State Highway Agency.