US Bridges

Swaller RD over Rock CR

Fair

Jefferson County, Missouri · S 33 T 43 N R 5 E · Structure no. 14222

Built
1985
40 years old
Condition
Fair
inspected February 2025
Type
Culvert
Concrete
Length
40 ft
1 main span
Daily traffic
308
2023 count
Owner
County
County Highway Agency

About this bridge

Swaller RD over Rock CR is a concrete culvert carrying Swaller RD over Rock CR in Jefferson County, Missouri. It was built in 1985, so it is 40 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.

It carries about 308 vehicles a day, roughly 10% of them trucks, projected to reach 524 by 2043. The structure is 40 ft (12.2 m) long and 30 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesSwaller RD
CrossesRock CR
LocationS 33 T 43 N R 5 E
RouteCounty Highway 0
CountyJefferson County
StateMissouri
Coordinates38.42672, -90.4719
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 inspectionFebruary 2025
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating45.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length40 ft (12.2 m)
Longest span12 ft (3.7 m)
Deck width30 ft (9.2 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic308 (2023)
Projected traffic524 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Swaller RD over Rock CR built?

It was built in 1985, making it 40 years old in 2025.

What condition is Swaller RD over Rock 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 February 2025.

How much traffic does Swaller RD over Rock CR carry?

About 308 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Swaller RD over Rock CR?

The structure is 40 ft (12.2 m) long with a longest span of 12 ft (3.7 m) and a deck 30 ft wide.

Who owns Swaller RD over Rock CR?

It is owned by the County Highway Agency.