US Bridges

Thornapple Riv Drv over Unnamed

Good

Kent County, Michigan · 0.35 MI N of 60th ST · Structure no. 000000000005135

Built
1967
58 years old, rebuilt 1999
Condition
Good
inspected November 2023
Type
Culvert
Steel
Length
26 ft
2 main spans
Daily traffic
1,201
2004 count
Owner
County
County Highway Agency

About this bridge

Thornapple Riv Drv over Unnamed is a steel culvert carrying Thornapple Riv Drv over Unnamed in Kent County, Michigan. It was built in 1967 and reconstructed in 1999, so it is 58 years old, older 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 1,201 vehicles a day, projected to reach 2,040 by 2024. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 6.8 mi (11 km).

CarriesThornapple Riv Drv
CrossesUnnamed
Location0.35 MI N of 60th ST
RouteCounty Highway 0
Coordinates42.86071, -85.49817
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length26 ft (7.9 m)
Longest span13 ft (3.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,201 (2004)
Projected traffic2,040 by 2024
Trucks0%
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 Thornapple Riv Drv over Unnamed built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1999.

What condition is Thornapple Riv Drv over Unnamed 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 November 2023.

How much traffic does Thornapple Riv Drv over Unnamed carry?

About 1,201 vehicles per day (2004 count).

How long is Thornapple Riv Drv over Unnamed?

The structure is 26 ft (7.9 m) long with a longest span of 13 ft (3.9 m).

Who owns Thornapple Riv Drv over Unnamed?

It is owned by the County Highway Agency.