US Bridges

School Road over South Br Chippewa River

Good

Isabella County, Michigan · Sec 36C Sherman Twp · Structure no. 000000000004371

Built
1989
36 years old
Condition
Good
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
77
2002 count
Owner
County
County Highway Agency

About this bridge

School Road over South Br Chippewa River is a prestressed concrete box beam or girders - multiple carrying School Road over South Br Chippewa River in Isabella County, Michigan. It was built in 1989, so it is 36 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 77 vehicles a day, projected to reach 94 by 2022. The structure is 65 ft (19.8 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesSchool Road
CrossesSouth Br Chippewa River
LocationSec 36C Sherman Twp
RouteCounty Highway 0
Coordinates43.64589, -84.9777
Functional classRural Local

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 protection7 GoodSome minor problems.
Last inspectionJuly 2024
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 geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.5 US tons
Inventory rating34.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span61 ft (18.6 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic77 (2002)
Projected traffic94 by 2022
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 School Road over South Br Chippewa River built?

It was built in 1989, making it 36 years old in 2025.

What condition is School Road over South Br Chippewa 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 2024.

How much traffic does School Road over South Br Chippewa River carry?

About 77 vehicles per day (2002 count).

How long is School Road over South Br Chippewa River?

The structure is 65 ft (19.8 m) long with a longest span of 61 ft (18.6 m) and a deck 31 ft wide.

Who owns School Road over South Br Chippewa River?

It is owned by the County Highway Agency.