US Bridges

518th RD over Browns Br

Good

Polk County, Missouri · S 18 T 32 N R 23 W · Structure no. 37111

Built
2023
2 years old
Condition
Good
inspected April 2024
Type
Culvert
Concrete
Length
36 ft
4 main spans
Daily traffic
25
2024 count
Owner
County
County Highway Agency

About this bridge

518th RD over Browns Br is a concrete culvert carrying 518th RD over Browns Br in Polk County, Missouri. It was built in 2023, so it is 2 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 25 vehicles a day, roughly 10% of them trucks, projected to reach 36 by 2044. The structure is 36 ft (11.1 m) long and 22 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
Carries518th RD
CrossesBrowns Br
LocationS 18 T 32 N R 23 W
RouteCounty Highway 314
CountyPolk County
StateMissouri
Coordinates37.50132, -93.49513
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating84.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length36 ft (11.1 m)
Longest span8 ft (2.4 m)
Deck width22 ft (6.7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2024)
Projected traffic36 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 518th RD over Browns Br built?

It was built in 2023, making it 2 years old in 2025.

What condition is 518th RD over Browns Br in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does 518th RD over Browns Br carry?

About 25 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is 518th RD over Browns Br?

The structure is 36 ft (11.1 m) long with a longest span of 8 ft (2.4 m) and a deck 22 ft wide.

Who owns 518th RD over Browns Br?

It is owned by the County Highway Agency.