US Bridges

Mcmasters Bridgerd over Au Sable River

Fair

Crawford County, Michigan · 16 MI E of Grayling · Structure no. 000000000002070

Built
1990
35 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
92 ft
1 main span
Daily traffic
199
1990 count
Owner
County
County Highway Agency

About this bridge

Mcmasters Bridgerd over Au Sable River is a prestressed concrete box beam or girders - multiple carrying Mcmasters Bridgerd over Au Sable River in Crawford County, Michigan. It was built in 1990, so it is 35 years old, younger 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 199 vehicles a day, projected to reach 300 by 2010. The structure is 92 ft (28 m) long and 31 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

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CarriesMcmasters Bridgerd
CrossesAu Sable River
Location16 MI E of Grayling
RouteCounty Highway 2093
CountyCrawford County
StateMichigan
Coordinates44.66539, -84.3973
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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.1 US tons
Inventory rating39.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length92 ft (28 m)
Longest span92 ft (28 m)
Deck width31 ft (9.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic199 (1990)
Projected traffic300 by 2010
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 Mcmasters Bridgerd over Au Sable River built?

It was built in 1990, making it 35 years old in 2025.

What condition is Mcmasters Bridgerd over 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 Mcmasters Bridgerd over Au Sable River carry?

About 199 vehicles per day (1990 count).

How long is Mcmasters Bridgerd over Au Sable River?

The structure is 92 ft (28 m) long with a longest span of 92 ft (28 m) and a deck 31 ft wide.

Who owns Mcmasters Bridgerd over Au Sable River?

It is owned by the County Highway Agency.