US Bridges

Rosebush Road over North Br Chippewa River

FairPosted for load

Isabella County, Michigan · Sec 12-13 Nottawa Twp · Structure no. 000000000004365

Built
1937
88 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
41 ft
1 main span
Daily traffic
123
2002 count
Owner
County
County Highway Agency

About this bridge

Rosebush Road over North Br Chippewa River is a steel stringer/multi-beam or girder carrying Rosebush Road over North Br Chippewa River in Isabella County, Michigan. It was built in 1937, so it is 88 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 123 vehicles a day, projected to reach 150 by 2022. The structure is 41 ft (12.5 m) long and 22 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesRosebush Road
CrossesNorth Br Chippewa River
LocationSec 12-13 Nottawa Twp
RouteCounty Highway 0
CountyIsabella County
StateMichigan
Coordinates43.69818, -84.85837
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.5 US tons
Inventory rating29.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length41 ft (12.5 m)
Longest span37 ft (11.2 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic123 (2002)
Projected traffic150 by 2022
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$188,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Rosebush Road over North Br Chippewa River built?

It was built in 1937, making it 88 years old in 2025.

What condition is Rosebush Road over North Br Chippewa 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 July 2024.

How much traffic does Rosebush Road over North Br Chippewa River carry?

About 123 vehicles per day (2002 count).

How long is Rosebush Road over North Br Chippewa River?

The structure is 41 ft (12.5 m) long with a longest span of 37 ft (11.2 m) and a deck 22 ft wide.

Who owns Rosebush Road over North Br Chippewa River?

It is owned by the County Highway Agency.