US Bridges

County RD 338 over Hillers CR

Poor

Callaway County, Missouri · S 17 T 46 N R 10 W · Structure no. 17435

Built
1935
90 years old, rebuilt 1984
Condition
Poor
inspected October 2024
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
80
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 338 over Hillers CR is a concrete culvert carrying County RD 338 over Hillers CR in Callaway County, Missouri. It was built in 1935 and reconstructed in 1984, so it is 90 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 80 vehicles a day, roughly 5% of them trucks, projected to reach 120 by 2043. The structure is 24 ft (7.3 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty RD 338
CrossesHillers CR
LocationS 17 T 46 N R 10 W
RouteCounty Highway 152
CountyCallaway County
StateMissouri
Coordinates38.75811, -92.07092
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length24 ft (7.3 m)
Longest span11 ft (3.4 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2023)
Projected traffic120 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$225,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 338 over Hillers CR built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1984.

What condition is County RD 338 over Hillers CR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does County RD 338 over Hillers CR carry?

About 80 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is County RD 338 over Hillers CR?

The structure is 24 ft (7.3 m) long with a longest span of 11 ft (3.4 m) and a deck 30 ft wide.

Who owns County RD 338 over Hillers CR?

It is owned by the County Highway Agency.