US Bridges

Chase Bridge RD over S Br Au Sable River

Fair

Crawford County, Michigan · 18.0 MI SE of Grayling · Structure no. 000000000002068

Built
1968
57 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
61 ft
1 main span
Daily traffic
286
1985 count
Owner
County
County Highway Agency

About this bridge

Chase Bridge RD over S Br Au Sable River is a prestressed concrete box beam or girders - multiple carrying Chase Bridge RD over S Br Au Sable River in Crawford County, Michigan. It was built in 1968, so it is 57 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 286 vehicles a day, projected to reach 8 by 2010. The structure is 61 ft (18.6 m) long and 30 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

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CarriesChase Bridge RD
CrossesS Br Au Sable River
Location18.0 MI SE of Grayling
RouteCounty Highway 2065
CountyCrawford County
StateMichigan
Coordinates44.54073, -84.55059
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.5 US tons
Inventory rating48.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length61 ft (18.6 m)
Longest span59 ft (17.9 m)
Deck width30 ft (9.2 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic286 (1985)
Projected traffic8 by 2010
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$2,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Chase Bridge RD over S Br Au Sable River built?

It was built in 1968, making it 57 years old in 2025.

What condition is Chase Bridge RD over S Br Au Sable 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 Chase Bridge RD over S Br Au Sable River carry?

About 286 vehicles per day (1985 count).

How long is Chase Bridge RD over S Br Au Sable River?

The structure is 61 ft (18.6 m) long with a longest span of 59 ft (17.9 m) and a deck 30 ft wide.

Who owns Chase Bridge RD over S Br Au Sable River?

It is owned by the County Highway Agency.