US Bridges

Old US-31 over Durham Creek

Fair

Mason County, Michigan · 0.9 MI N of Oceana Col · Structure no. 000000000006635

Built
1925
100 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete
Length
24 ft
2 main spans
Daily traffic
8,600
1997 count
Owner
County
County Highway Agency

About this bridge

Old US-31 over Durham Creek is a concrete slab carrying Old US-31 over Durham Creek in Mason County, Michigan. It was built in 1925, 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 8,600 vehicles a day, roughly 6% of them trucks, projected to reach 9,300 by 2017. The structure is 24 ft (7.3 m) long and 45 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesOld US-31
CrossesDurham Creek
Location0.9 MI N of Oceana Col
RouteCounty Highway 0
CountyMason County
StateMichigan
Coordinates43.83184, -86.3988
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47.5 US tons
Inventory rating28.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length24 ft (7.3 m)
Longest span12 ft (3.6 m)
Deck width45 ft (13.8 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,600 (1997)
Projected traffic9,300 by 2017
Trucks6%
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 Old US-31 over Durham Creek built?

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

What condition is Old US-31 over Durham Creek 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 August 2024.

How much traffic does Old US-31 over Durham Creek carry?

About 8,600 vehicles per day (1997 count), of which roughly 6% are trucks.

How long is Old US-31 over Durham Creek?

The structure is 24 ft (7.3 m) long with a longest span of 12 ft (3.6 m) and a deck 45 ft wide.

Who owns Old US-31 over Durham Creek?

It is owned by the County Highway Agency.