US Bridges

Deerfield RD over River Raisin

Poor

Monroe County, Michigan · 2.9 MI E of County Line · Structure no. 000000000007230

Built
1963
62 years old
Condition
Poor
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
185 ft
3 main spans
Daily traffic
1,920
2019 count
Owner
County
County Highway Agency

About this bridge

Deerfield RD over River Raisin is a prestressed concrete box beam or girders - multiple carrying Deerfield RD over River Raisin in Monroe County, Michigan. It was built in 1963, so it is 62 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,920 vehicles a day, roughly 23% of them trucks, projected to reach 2,207 by 2036. The structure is 185 ft (56.4 m) long and 34 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesDeerfield RD
CrossesRiver Raisin
Location2.9 MI E of County Line
RouteCounty Highway 5850
Coordinates41.90208, -83.71765
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71.4 US tons
Inventory rating42.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadH 20
Structure length185 ft (56.4 m)
Longest span64 ft (19.5 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,920 (2019)
Projected traffic2,207 by 2036
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 1963, making it 62 years old in 2025.

What condition is Deerfield RD over River Raisin in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does Deerfield RD over River Raisin carry?

About 1,920 vehicles per day (2019 count), of which roughly 23% are trucks.

How long is Deerfield RD over River Raisin?

The structure is 185 ft (56.4 m) long with a longest span of 64 ft (19.5 m) and a deck 34 ft wide.

Who owns Deerfield RD over River Raisin?

It is owned by the County Highway Agency.