US Bridges

50th Ave over Middle Branch River

Fair

Osceola County, Michigan · Marion Twp Sec 19/10 · Structure no. 000000000013363

Built
1973
52 years old
Condition
Fair
inspected July 2024
Type
Culvert
Steel
Length
28 ft
2 main spans
Daily traffic
73
2006 count
Owner
County
County Highway Agency

About this bridge

50th Ave over Middle Branch River is a steel culvert carrying 50th Ave over Middle Branch River in Osceola County, Michigan. It was built in 1973, so it is 52 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 73 vehicles a day, projected to reach 161 by 2026. The structure is 28 ft (8.4 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries50th Ave
CrossesMiddle Branch River
LocationMarion Twp Sec 19/10
RouteCounty Highway 0
CountyOsceola County
StateMichigan
Coordinates44.11115, -85.1876
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length28 ft (8.4 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic73 (2006)
Projected traffic161 by 2026
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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$300,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 50th Ave over Middle Branch River built?

It was built in 1973, making it 52 years old in 2025.

What condition is 50th Ave over Middle Branch 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 July 2024.

How much traffic does 50th Ave over Middle Branch River carry?

About 73 vehicles per day (2006 count).

How long is 50th Ave over Middle Branch River?

The structure is 28 ft (8.4 m) long with a longest span of 12 ft (3.7 m).

Who owns 50th Ave over Middle Branch River?

It is owned by the County Highway Agency.