US Bridges

Deerfield RD over River Raisin

Good

Lenawee County, Michigan · 0.1 MI East of Humphrey · Structure no. 000000000005569

Built
2022
3 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
150 ft
1 main span
Daily traffic
7,577
2021 count
Owner
County
County Highway Agency

About this bridge

Deerfield RD over River Raisin is a prestressed concrete stringer/multi-beam or girder carrying Deerfield RD over River Raisin in Lenawee County, Michigan. It was built in 2022, so it is 3 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 7,577 vehicles a day, roughly 7% of them trucks, projected to reach 8,500 by 2041. The structure is 150 ft (45.7 m) long and 39 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesDeerfield RD
CrossesRiver Raisin
Location0.1 MI East of Humphrey
RouteCounty Highway 4644
CountyLenawee County
StateMichigan
Coordinates41.88507, -83.97078
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating107.1 US tons
Inventory rating74 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length150 ft (45.7 m)
Longest span147 ft (44.8 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,577 (2021)
Projected traffic8,500 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Deerfield RD over River Raisin built?

It was built in 2022, making it 3 years old in 2025.

What condition is Deerfield RD over River Raisin in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does Deerfield RD over River Raisin carry?

About 7,577 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is Deerfield RD over River Raisin?

The structure is 150 ft (45.7 m) long with a longest span of 147 ft (44.8 m) and a deck 39 ft wide.

Who owns Deerfield RD over River Raisin?

It is owned by the County Highway Agency.