US Bridges

Alabaster RD over E Br of Au Gres Riv

Fair

Iosco County, Michigan · 0.3 MI E of Sand Lake RD · Structure no. 000000000004133

Built
1980
45 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
72 ft
1 main span
Daily traffic
640
2006 count
Owner
County
County Highway Agency

About this bridge

Alabaster RD over E Br of Au Gres Riv is a prestressed concrete box beam or girders - multiple carrying Alabaster RD over E Br of Au Gres Riv in Iosco County, Michigan. It was built in 1980, so it is 45 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 640 vehicles a day, roughly 10% of them trucks, projected to reach 1,140 by 2026. The structure is 72 ft (21.9 m) long and 34 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesAlabaster RD
CrossesE Br of Au Gres Riv
Location0.3 MI E of Sand Lake RD
RouteCounty Highway 3512
CountyIosco County
StateMichigan
Coordinates44.20586, -83.67588
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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97.1 US tons
Inventory rating58.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length72 ft (21.9 m)
Longest span68 ft (20.7 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic640 (2006)
Projected traffic1,140 by 2026
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 Alabaster RD over E Br of Au Gres Riv built?

It was built in 1980, making it 45 years old in 2025.

What condition is Alabaster RD over E Br of Au Gres Riv 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 June 2024.

How much traffic does Alabaster RD over E Br of Au Gres Riv carry?

About 640 vehicles per day (2006 count), of which roughly 10% are trucks.

How long is Alabaster RD over E Br of Au Gres Riv?

The structure is 72 ft (21.9 m) long with a longest span of 68 ft (20.7 m) and a deck 34 ft wide.

Who owns Alabaster RD over E Br of Au Gres Riv?

It is owned by the County Highway Agency.