US Bridges

Potter RD over I-75 NB

Fair

Cheboygan County, Michigan · 0.6 MI S of US-31 · Structure no. 000000000001518

Built
1960
65 years old
Condition
Fair
inspected April 2023
Type
Tee Beam
Concrete Continuous
Length
240 ft
4 main spans
Daily traffic
60
1997 count
Owner
State
State Highway Agency

About this bridge

Potter RD over I-75 NB is a concrete continuous tee beam carrying Potter RD over I-75 NB in Cheboygan County, Michigan. It was built in 1960, so it is 65 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 60 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2007. The structure is 240 ft (73.1 m) long and 31 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesPotter RD
CrossesI-75 NB
Location0.6 MI S of US-31
RouteCounty Highway 0
CountyCheboygan County
StateMichigan
Coordinates45.72296, -84.72821
Functional classRural Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating66.8 US tons
Inventory rating40 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length240 ft (73.1 m)
Longest span75 ft (22.9 m)
Deck width31 ft (9.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (1997)
Projected traffic100 by 2007
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 Potter RD over I-75 NB built?

It was built in 1960, making it 65 years old in 2025.

What condition is Potter 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 April 2023.

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

About 60 vehicles per day (1997 count), of which roughly 3% are trucks.

How long is Potter RD over I-75 NB?

The structure is 240 ft (73.1 m) long with a longest span of 75 ft (22.9 m) and a deck 31 ft wide.

Who owns Potter RD over I-75 NB?

It is owned by the State Highway Agency.