US Bridges

County Road H 1 over Rapid River

Fair

Delta County, Michigan · 3 M N 1 M E of Rock · Structure no. 000000000002157

Built
1967
58 years old, rebuilt 2021
Condition
Fair
inspected September 2023
Type
Slab
Concrete
Length
42 ft
1 main span
Daily traffic
54
2022 count
Owner
County
County Highway Agency

About this bridge

County Road H 1 over Rapid River is a concrete slab carrying County Road H 1 over Rapid River in Delta County, Michigan. It was built in 1967 and reconstructed in 2021, 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 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 54 vehicles a day, roughly 4% of them trucks, projected to reach 59 by 2042. The structure is 42 ft (12.7 m) long and 22 ft wide. If it were closed, the detour would be 124.3 mi (200 km).

Location

Open in Google Maps
CarriesCounty Road H 1
CrossesRapid River
Location3 M N 1 M E of Rock
RouteCounty Highway 0
CountyDelta County
StateMichigan
Coordinates46.11042, -87.14746
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment8: Equal to present desirable criteria
Operating rating98.5 US tons
Inventory rating75.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length42 ft (12.7 m)
Longest span36 ft (11.1 m)
Deck width22 ft (6.6 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54 (2022)
Projected traffic59 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed124.3 mi (200 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$40,000
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road H 1 over Rapid River built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2021.

What condition is County Road H 1 over Rapid 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 September 2023.

How much traffic does County Road H 1 over Rapid River carry?

About 54 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is County Road H 1 over Rapid River?

The structure is 42 ft (12.7 m) long with a longest span of 36 ft (11.1 m) and a deck 22 ft wide.

Who owns County Road H 1 over Rapid River?

It is owned by the County Highway Agency.