US Bridges

Bentoak Ave over S Branch Raisin River

Fair

Lenawee County, Michigan · City of Adrian · Structure no. 000000000005717

Built
1952
73 years old, rebuilt 1999
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
13,600
2004 count
Owner
City
City or Municipal Highway Agency

About this bridge

Bentoak Ave over S Branch Raisin River is a steel stringer/multi-beam or girder carrying Bentoak Ave over S Branch Raisin River in Lenawee County, Michigan. It was built in 1952 and reconstructed in 1999, so it is 73 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 13,600 vehicles a day, roughly 5% of them trucks, projected to reach 15,640 by 2024. The structure is 70 ft (21.3 m) long and 46 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesBentoak Ave
CrossesS Branch Raisin River
LocationCity of Adrian
RouteCity Street 2017
CountyLenawee County
StateMichigan
Coordinates41.90833, -84.03337
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.9 US tons
Inventory rating47.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length70 ft (21.3 m)
Longest span69 ft (21 m)
Deck width46 ft (14 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,600 (2004)
Projected traffic15,640 by 2024
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Bentoak Ave over S Branch Raisin River built?

It was built in 1952, making it 73 years old in 2025. It was reconstructed in 1999.

What condition is Bentoak Ave over S Branch 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 March 2023.

How much traffic does Bentoak Ave over S Branch Raisin River carry?

About 13,600 vehicles per day (2004 count), of which roughly 5% are trucks.

How long is Bentoak Ave over S Branch Raisin River?

The structure is 70 ft (21.3 m) long with a longest span of 69 ft (21 m) and a deck 46 ft wide.

Who owns Bentoak Ave over S Branch Raisin River?

It is owned by the City or Municipal Highway Agency.