US Bridges

County RD 456 over Gallons CR

Fair

Callaway County, Missouri · S 18 T 45 N R 9 W · Structure no. 20520

Built
1987
38 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
20
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 456 over Gallons CR is a concrete culvert carrying County RD 456 over Gallons CR in Callaway County, Missouri. It was built in 1987, so it is 38 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.

It carries about 20 vehicles a day, roughly 5% of them trucks, projected to reach 30 by 2043. The structure is 24 ft (7.3 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCounty RD 456
CrossesGallons CR
LocationS 18 T 45 N R 9 W
RouteCounty Highway 263
CountyCallaway County
StateMissouri
Coordinates38.67697, -91.97753
Functional classRural 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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length24 ft (7.3 m)
Longest span12 ft (3.7 m)
Deck width31 ft (9.4 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2023)
Projected traffic30 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 County RD 456 over Gallons CR built?

It was built in 1987, making it 38 years old in 2025.

What condition is County RD 456 over Gallons 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 October 2024.

How much traffic does County RD 456 over Gallons CR carry?

About 20 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is County RD 456 over Gallons CR?

The structure is 24 ft (7.3 m) long with a longest span of 12 ft (3.7 m) and a deck 31 ft wide.

Who owns County RD 456 over Gallons CR?

It is owned by the County Highway Agency.