US Bridges

M-34 over S Br Raisin River

Fair

Lenawee County, Michigan · 0.7 MI E of M-156 · Structure no. 000000000005506

Built
1928
97 years old, rebuilt 1993
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
4,413
2007 count
Owner
State
State Highway Agency

About this bridge

M-34 over S Br Raisin River is a prestressed concrete box beam or girders - multiple carrying M-34 over S Br Raisin River in Lenawee County, Michigan. It was built in 1928 and reconstructed in 1993, so it is 97 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 4,413 vehicles a day, roughly 9% of them trucks, projected to reach 5,720 by 2018. The structure is 30 ft (9.1 m) long and 47 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesM-34
CrossesS Br Raisin River
Location0.7 MI E of M-156
RouteState Highway 34
CountyLenawee County
StateMichigan
Coordinates41.8572, -84.22374
Functional classRural 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating102.2 US tons
Inventory rating46.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,413 (2007)
Projected traffic5,720 by 2018
Trucks9%
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

OwnerState Highway Agency
Maintained byState 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 M-34 over S Br Raisin River built?

It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1993.

What condition is M-34 over S Br Raisin 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 June 2024.

How much traffic does M-34 over S Br Raisin River carry?

About 4,413 vehicles per day (2007 count), of which roughly 9% are trucks.

How long is M-34 over S Br Raisin River?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 47 ft wide.

Who owns M-34 over S Br Raisin River?

It is owned by the State Highway Agency.