US Bridges

Wilson Road over Maple River

Fair

Gratiot County, Michigan · Sec 28-33 Elba Twp · Structure no. 000000000003135

Built
1974
51 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
141 ft
3 main spans
Daily traffic
660
2003 count
Owner
County
County Highway Agency

About this bridge

Wilson Road over Maple River is a prestressed concrete box beam or girders - multiple carrying Wilson Road over Maple River in Gratiot County, Michigan. It was built in 1974, so it is 51 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 660 vehicles a day, projected to reach 890 by 2023. The structure is 141 ft (42.9 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesWilson Road
CrossesMaple River
LocationSec 28-33 Elba Twp
RouteCounty Highway 2906
Coordinates43.13242, -84.42815
Functional classRural Major 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionJune 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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating69.9 US tons
Inventory rating41.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20 + Mod
Structure length141 ft (42.9 m)
Longest span46 ft (14 m)
Deck width31 ft (9.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic660 (2003)
Projected traffic890 by 2023
Trucks0%
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

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 Wilson Road over Maple River built?

It was built in 1974, making it 51 years old in 2025.

What condition is Wilson Road over Maple 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 2023.

How much traffic does Wilson Road over Maple River carry?

About 660 vehicles per day (2003 count).

How long is Wilson Road over Maple River?

The structure is 141 ft (42.9 m) long with a longest span of 46 ft (14 m) and a deck 31 ft wide.

Who owns Wilson Road over Maple River?

It is owned by the County Highway Agency.