US Bridges

County RD 612 over Manistee River

Fair

Crawford County, Michigan · 5.0 MI SW of Frederic · Structure no. 000000000002063

Built
1920
105 years old, rebuilt 1960
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
250
1985 count
Owner
County
County Highway Agency

About this bridge

County RD 612 over Manistee River is a prestressed concrete box beam or girders - multiple carrying County RD 612 over Manistee River in Crawford County, Michigan. It was built in 1920 and reconstructed in 1960, so it is 105 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.

It carries about 250 vehicles a day, projected to reach 400 by 2010. The structure is 62 ft (18.9 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty RD 612
CrossesManistee River
Location5.0 MI SW of Frederic
RouteCounty Highway 2082
CountyCrawford County
StateMichigan
Coordinates44.77122, -84.84141
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.3 US tons
Inventory rating53.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length62 ft (18.9 m)
Longest span62 ft (18.9 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (1985)
Projected traffic400 by 2010
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 612 over Manistee River built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1960.

What condition is County RD 612 over Manistee 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 October 2024.

How much traffic does County RD 612 over Manistee River carry?

About 250 vehicles per day (1985 count).

How long is County RD 612 over Manistee River?

The structure is 62 ft (18.9 m) long with a longest span of 62 ft (18.9 m) and a deck 27 ft wide.

Who owns County RD 612 over Manistee River?

It is owned by the County Highway Agency.