US Bridges

Charlton Park Road over Little Thornapple River

Good

Barry County, Michigan · Carlton Twp Sec 23 · Structure no. 000000000000560

Built
2020
5 years old
Condition
Good
inspected July 2023
Type
Slab
Wood or Timber
Length
39 ft
1 main span
Daily traffic
557
2019 count
Owner
County
County Highway Agency

About this bridge

Charlton Park Road over Little Thornapple River is a wood or timber slab carrying Charlton Park Road over Little Thornapple River in Barry County, Michigan. It was built in 2020, so it is 5 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 557 vehicles a day, roughly 2% of them trucks, projected to reach 680 by 2039. The structure is 39 ft (11.9 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCharlton Park Road
CrossesLittle Thornapple River
LocationCarlton Twp Sec 23
RouteCounty Highway 875
CountyBarry County
StateMichigan
Coordinates42.72149, -85.21496
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating68.2 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadGreater than HL 93
Structure length39 ft (11.9 m)
Longest span38 ft (11.6 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic557 (2019)
Projected traffic680 by 2039
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$426,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Charlton Park Road over Little Thornapple River built?

It was built in 2020, making it 5 years old in 2025.

What condition is Charlton Park Road over Little Thornapple River 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 Charlton Park Road over Little Thornapple River carry?

About 557 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is Charlton Park Road over Little Thornapple River?

The structure is 39 ft (11.9 m) long with a longest span of 38 ft (11.6 m) and a deck 34 ft wide.

Who owns Charlton Park Road over Little Thornapple River?

It is owned by the County Highway Agency.