US Bridges

7 Mile Road over Hersey Creek

Good

Osceola County, Michigan · Section 29/32 T18N R10W · Structure no. 000000000008608

Built
2001
24 years old
Condition
Good
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
49 ft
1 main span
Daily traffic
460
2002 count
Owner
County
County Highway Agency

About this bridge

7 Mile Road over Hersey Creek is a prestressed concrete box beam or girders - multiple carrying 7 Mile Road over Hersey Creek in Osceola County, Michigan. It was built in 2001, so it is 24 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 460 vehicles a day, projected to reach 830 by 2020. The structure is 49 ft (15 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries7 Mile Road
CrossesHersey Creek
LocationSection 29/32 T18N R10W
RouteCounty Highway 6726
CountyOsceola County
StateMichigan
Coordinates43.91618, -85.52378
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.1 US tons
Inventory rating42.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length49 ft (15 m)
Longest span45 ft (13.8 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic460 (2002)
Projected traffic830 by 2020
Trucks0%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 7 Mile Road over Hersey Creek built?

It was built in 2001, making it 24 years old in 2025.

What condition is 7 Mile Road over Hersey Creek 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 2024.

How much traffic does 7 Mile Road over Hersey Creek carry?

About 460 vehicles per day (2002 count).

How long is 7 Mile Road over Hersey Creek?

The structure is 49 ft (15 m) long with a longest span of 45 ft (13.8 m) and a deck 34 ft wide.

Who owns 7 Mile Road over Hersey Creek?

It is owned by the County Highway Agency.