US Bridges

Dix Ave over Coldwater CR

FairPosted for load

St. Louis County, Missouri · S 20 T 46 N R 6 E · Structure no. 13937

Built
1984
41 years old
Condition
Fair
inspected December 2023
Type
Culvert
Concrete Continuous
Length
40 ft
2 main spans
Daily traffic
300
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Dix Ave over Coldwater CR is a concrete continuous culvert carrying Dix Ave over Coldwater CR in St. Louis County, Missouri. It was built in 1984, so it is 41 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 6 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 300 vehicles a day, roughly 1% of them trucks, projected to reach 405 by 2043. The structure is 40 ft (12.2 m) long and 40 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesDix Ave
CrossesColdwater CR
LocationS 20 T 46 N R 6 E
RouteCity Street 0
CountySt. Louis County
StateMissouri
Coordinates38.71653, -90.36354
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
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 geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating25.8 US tons
Inventory rating18.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span16 ft (4.9 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2023)
Projected traffic405 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 Dix Ave over Coldwater CR built?

It was built in 1984, making it 41 years old in 2025.

What condition is Dix Ave over Coldwater CR 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 December 2023.

How much traffic does Dix Ave over Coldwater CR carry?

About 300 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Dix Ave over Coldwater CR?

The structure is 40 ft (12.2 m) long with a longest span of 16 ft (4.9 m) and a deck 40 ft wide.

Who owns Dix Ave over Coldwater CR?

It is owned by the City or Municipal Highway Agency.