US Bridges

Starling Airport over Big Muddy CR

Good

Jefferson County, Missouri · S 22 T 43 N R 6 E · Structure no. 12624

Built
1997
28 years old
Condition
Good
inspected March 2023
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
28 ft
1 main span
Daily traffic
9,500
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Starling Airport over Big Muddy CR is a aluminum, wrought iron, or cast iron culvert carrying Starling Airport over Big Muddy CR in Jefferson County, Missouri. It was built in 1997, so it is 28 years old, younger than the Missouri average of 45.1 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 9,500 vehicles a day, roughly 5% of them trucks, projected to reach 16,150 by 2043. The structure is 28 ft (8.5 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesStarling Airport
CrossesBig Muddy CR
LocationS 22 T 43 N R 6 E
RouteCity Street 0
CountyJefferson County
StateMissouri
Coordinates38.44927, -90.35814
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span25 ft (7.6 m)
Deck width42 ft (12.7 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,500 (2023)
Projected traffic16,150 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Starling Airport over Big Muddy CR built?

It was built in 1997, making it 28 years old in 2025.

What condition is Starling Airport over Big Muddy CR 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 March 2023.

How much traffic does Starling Airport over Big Muddy CR carry?

About 9,500 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Starling Airport over Big Muddy CR?

The structure is 28 ft (8.5 m) long with a longest span of 25 ft (7.6 m) and a deck 42 ft wide.

Who owns Starling Airport over Big Muddy CR?

It is owned by the City or Municipal Highway Agency.