US Bridges

Supply Road over Boardman River

Fair

Grand Traverse County, Michigan · 7 M N & 2 M W O Fife Lake · Structure no. 000000000003065

Built
1954
71 years old
Condition
Fair
inspected September 2024
Type
Culvert
Steel
Length
28 ft
2 main spans
Daily traffic
5,163
2019 count
Owner
County
County Highway Agency

About this bridge

Supply Road over Boardman River is a steel culvert carrying Supply Road over Boardman River in Grand Traverse County, Michigan. It was built in 1954, so it is 71 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 5,163 vehicles a day, roughly 25% of them trucks, projected to reach 6,000 by 2030. The structure is 28 ft (8.5 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesSupply Road
CrossesBoardman River
Location7 M N & 2 M W O Fife Lake
RouteCounty Highway 2852
CountyGrand Traverse County
StateMichigan
Coordinates44.67466, -85.39602
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span12 ft (3.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,163 (2019)
Projected traffic6,000 by 2030
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Supply Road over Boardman River built?

It was built in 1954, making it 71 years old in 2025.

What condition is Supply Road over Boardman River 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 Supply Road over Boardman River carry?

About 5,163 vehicles per day (2019 count), of which roughly 25% are trucks.

How long is Supply Road over Boardman River?

The structure is 28 ft (8.5 m) long with a longest span of 12 ft (3.6 m).

Who owns Supply Road over Boardman River?

It is owned by the County Highway Agency.