US Bridges

Union RD over Union & State Line Drain

Fair

Cass County, Michigan · 1.8 MI N of US-12 · Structure no. 000000000014105

Built
1970
55 years old
Condition
Fair
inspected October 2024
Type
Culvert
Steel
Length
30 ft
2 main spans
Daily traffic
1,412
2018 count
Owner
County
County Highway Agency

About this bridge

Union RD over Union & State Line Drain is a steel culvert carrying Union RD over Union & State Line Drain in Cass County, Michigan. It was built in 1970, so it is 55 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 1,412 vehicles a day, projected to reach 1,624 by 2038. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUnion RD
CrossesUnion & State Line Drain
Location1.8 MI N of US-12
RouteCounty Highway 1475
CountyCass County
StateMichigan
Coordinates41.8123, -85.8667
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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 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 alignment6: Equal to present minimum criteria
Operating rating107.1 US tons
Inventory rating78.9 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length30 ft (9.1 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 traffic1,412 (2018)
Projected traffic1,624 by 2038
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Union RD over Union & State Line Drain built?

It was built in 1970, making it 55 years old in 2025.

What condition is Union RD over Union & State Line Drain 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 October 2024.

How much traffic does Union RD over Union & State Line Drain carry?

About 1,412 vehicles per day (2018 count).

How long is Union RD over Union & State Line Drain?

The structure is 30 ft (9.1 m) long with a longest span of 12 ft (3.7 m).

Who owns Union RD over Union & State Line Drain?

It is owned by the County Highway Agency.