US Bridges

S Stringtown RD over Smith Branch CR

Poor

Warren County, Missouri · S 23 T 47 N R 1 W · Structure no. 14711

Built
1960
65 years old
Condition
Poor
inspected February 2024
Type
Culvert
Concrete
Length
48 ft
2 main spans
Daily traffic
300
2024 count
Owner
County
County Highway Agency

About this bridge

S Stringtown RD over Smith Branch CR is a concrete culvert carrying S Stringtown RD over Smith Branch CR in Warren County, Missouri. It was built in 1960, so it is 65 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 300 vehicles a day, roughly 10% of them trucks, projected to reach 480 by 2044. The structure is 48 ft (14.6 m) long and 29 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesS Stringtown RD
CrossesSmith Branch CR
LocationS 23 T 47 N R 1 W
RouteCounty Highway 73
CountyWarren County
StateMissouri
Coordinates38.81456, -90.99458
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 inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadOther
Structure length48 ft (14.6 m)
Longest span23 ft (7 m)
Deck width29 ft (8.8 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2024)
Projected traffic480 by 2044
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 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 S Stringtown RD over Smith Branch CR built?

It was built in 1960, making it 65 years old in 2025.

What condition is S Stringtown RD over Smith Branch 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 February 2024.

How much traffic does S Stringtown RD over Smith Branch CR carry?

About 300 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is S Stringtown RD over Smith Branch CR?

The structure is 48 ft (14.6 m) long with a longest span of 23 ft (7 m) and a deck 29 ft wide.

Who owns S Stringtown RD over Smith Branch CR?

It is owned by the County Highway Agency.