US Bridges

Wilbur Road over River Raisin

Good

Washtenaw County, Michigan · Bridgwater Twp Sec 20 · Structure no. 000000000011042

Built
2006
19 years old
Condition
Good
inspected July 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
120 ft
1 main span
Daily traffic
231
2005 count
Owner
County
County Highway Agency

About this bridge

Wilbur Road over River Raisin is a prestressed concrete box beam or girders - single or spread carrying Wilbur Road over River Raisin in Washtenaw County, Michigan. It was built in 2006, so it is 19 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 231 vehicles a day, projected to reach 417 by 2025. The structure is 120 ft (36.6 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesWilbur Road
CrossesRiver Raisin
LocationBridgwater Twp Sec 20
RouteCounty Highway 0
CountyWashtenaw County
StateMichigan
Coordinates42.11905, -83.97471
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating107.1 US tons
Inventory rating57.5 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span116 ft (35.4 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic231 (2005)
Projected traffic417 by 2025
Trucks0%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Wilbur Road over River Raisin built?

It was built in 2006, making it 19 years old in 2025.

What condition is Wilbur Road 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 July 2023.

How much traffic does Wilbur Road over River Raisin carry?

About 231 vehicles per day (2005 count).

How long is Wilbur Road over River Raisin?

The structure is 120 ft (36.6 m) long with a longest span of 116 ft (35.4 m) and a deck 31 ft wide.

Who owns Wilbur Road over River Raisin?

It is owned by the County Highway Agency.