US Bridges

Island Road over Maple River

Fair

Clinton County, Michigan · 1/4 MI E of Upton RD · Structure no. 000000000001914

Built
1966
59 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
189 ft
3 main spans
Daily traffic
1,080
2018 count
Owner
County
County Highway Agency

About this bridge

Island Road over Maple River is a prestressed concrete box beam or girders - multiple carrying Island Road over Maple River in Clinton County, Michigan. It was built in 1966, so it is 59 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 6 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 1,080 vehicles a day, roughly 2% of them trucks, projected to reach 1,210 by 2038. The structure is 189 ft (57.6 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesIsland Road
CrossesMaple River
Location1/4 MI E of Upton RD
RouteCounty Highway 1982
CountyClinton County
StateMichigan
Coordinates43.08867, -84.40749
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.2 US tons
Inventory rating37.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadH 20
Structure length189 ft (57.6 m)
Longest span61 ft (18.7 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,080 (2018)
Projected traffic1,210 by 2038
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Island Road over Maple River built?

It was built in 1966, making it 59 years old in 2025.

What condition is Island 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 October 2023.

How much traffic does Island Road over Maple River carry?

About 1,080 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is Island Road over Maple River?

The structure is 189 ft (57.6 m) long with a longest span of 61 ft (18.7 m) and a deck 32 ft wide.

Who owns Island Road over Maple River?

It is owned by the County Highway Agency.