US Bridges

South Airport Road over Crooked Creek

Good

Montmorency County, Michigan · Section 18 Avery Twp · Structure no. 000000000012721

Built
1999
26 years old
Condition
Good
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
39 ft
1 main span
Daily traffic
110
2005 count
Owner
County
County Highway Agency

About this bridge

South Airport Road over Crooked Creek is a prestressed concrete box beam or girders - multiple carrying South Airport Road over Crooked Creek in Montmorency County, Michigan. It was built in 1999, so it is 26 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 110 vehicles a day, roughly 5% of them trucks, projected to reach 200 by 2025. The structure is 39 ft (12 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSouth Airport Road
CrossesCrooked Creek
LocationSection 18 Avery Twp
RouteCounty Highway 0
Coordinates44.98829, -84.13262
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.5 US tons
Inventory rating39.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length39 ft (12 m)
Longest span38 ft (11.5 m)
Deck width31 ft (9.5 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2005)
Projected traffic200 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 South Airport Road over Crooked Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is South Airport Road over Crooked Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

How much traffic does South Airport Road over Crooked Creek carry?

About 110 vehicles per day (2005 count), of which roughly 5% are trucks.

How long is South Airport Road over Crooked Creek?

The structure is 39 ft (12 m) long with a longest span of 38 ft (11.5 m) and a deck 31 ft wide.

Who owns South Airport Road over Crooked Creek?

It is owned by the County Highway Agency.