US Bridges

Avalon Hills DR over N Trib of Williams

FairPosted for load

St. Louis County, Missouri · S 30 T 44 N R 5 E · Structure no. 28387

Built
1999
26 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
68 ft
2 main spans
Daily traffic
2,019
2024 count
Owner
County
County Highway Agency

About this bridge

Avalon Hills DR over N Trib of Williams is a concrete culvert carrying Avalon Hills DR over N Trib of Williams in St. Louis County, Missouri. It was built in 1999, so it is 26 years old, younger than the Missouri average of 45.1 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. Its operating status is: posted for load restriction.

It carries about 2,019 vehicles a day, roughly 2% of them trucks, projected to reach 2,726 by 2044. The structure is 68 ft (20.7 m) long and 43 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesAvalon Hills DR
CrossesN Trib of Williams
LocationS 30 T 44 N R 5 E
RouteCounty Highway 0
CountySt. Louis County
StateMissouri
Coordinates38.53094, -90.50654
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating62.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length68 ft (20.7 m)
Longest span32 ft (9.8 m)
Deck width43 ft (13.1 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,019 (2024)
Projected traffic2,726 by 2044
Trucks2%
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

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 Avalon Hills DR over N Trib of Williams built?

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

What condition is Avalon Hills DR over N Trib of Williams 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 March 2024.

How much traffic does Avalon Hills DR over N Trib of Williams carry?

About 2,019 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Avalon Hills DR over N Trib of Williams?

The structure is 68 ft (20.7 m) long with a longest span of 32 ft (9.8 m) and a deck 43 ft wide.

Who owns Avalon Hills DR over N Trib of Williams?

It is owned by the County Highway Agency.