US Bridges

Bayport Road over Columbia Drain

Fair

Huron County, Michigan · Sec. 24 Sebewaing Twp · Structure no. 000000000003538

Built
1925
100 years old, rebuilt 1972
Condition
Fair
inspected October 2023
Type
Tee Beam
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
1,280
2009 count
Owner
County
County Highway Agency

About this bridge

Bayport Road over Columbia Drain is a prestressed concrete tee beam carrying Bayport Road over Columbia Drain in Huron County, Michigan. It was built in 1925 and reconstructed in 1972, so it is 100 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 1,280 vehicles a day, roughly 3% of them trucks, projected to reach 2,300 by 2029. The structure is 60 ft (18.3 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesBayport Road
CrossesColumbia Drain
LocationSec. 24 Sebewaing Twp
RouteCounty Highway 3215
CountyHuron County
StateMichigan
Coordinates43.70315, -83.35501
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.6 US tons
Inventory rating63.2 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span53 ft (16.1 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,280 (2009)
Projected traffic2,300 by 2029
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Bayport Road over Columbia Drain built?

It was built in 1925, making it 100 years old in 2025. It was reconstructed in 1972.

What condition is Bayport Road over Columbia 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 2023.

How much traffic does Bayport Road over Columbia Drain carry?

About 1,280 vehicles per day (2009 count), of which roughly 3% are trucks.

How long is Bayport Road over Columbia Drain?

The structure is 60 ft (18.3 m) long with a longest span of 53 ft (16.1 m) and a deck 28 ft wide.

Who owns Bayport Road over Columbia Drain?

It is owned by the County Highway Agency.