US Bridges

Buchanan Road over US-31

Fair

Berrien County, Michigan · 2.0 MI W of Niles · Structure no. 000000000000898

Built
1973
52 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
403 ft
5 main spans
Daily traffic
7,073
2010 count
Owner
State
State Highway Agency

About this bridge

Buchanan Road over US-31 is a steel stringer/multi-beam or girder carrying Buchanan Road over US-31 in Berrien 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 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 7,073 vehicles a day, roughly 16% of them trucks, projected to reach 8,488 by 2025. The structure is 403 ft (122.8 m) long and 115 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesBuchanan Road
CrossesUS-31
Location2.0 MI W of Niles
RouteCounty Highway 0
Coordinates41.82778, -86.31345
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.2 US tons
Inventory rating35.4 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length403 ft (122.8 m)
Longest span111 ft (33.8 m)
Deck width115 ft (35 m)
Roadway width108 ft (33 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,073 (2010)
Projected traffic8,488 by 2025
Trucks16%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$376,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Buchanan Road over US-31 built?

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

What condition is Buchanan Road over US-31 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 May 2024.

How much traffic does Buchanan Road over US-31 carry?

About 7,073 vehicles per day (2010 count), of which roughly 16% are trucks.

How long is Buchanan Road over US-31?

The structure is 403 ft (122.8 m) long with a longest span of 111 ft (33.8 m) and a deck 115 ft wide.

Who owns Buchanan Road over US-31?

It is owned by the State Highway Agency.