US Bridges

S Main ST over Town Br

Fair

Polk County, Missouri · S 1 T 34 N R 23 W · Structure no. 13671

Built
1900
125 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
32 ft
2 main spans
Daily traffic
2,900
2024 count
Owner
County
County Highway Agency

About this bridge

S Main ST over Town Br is a concrete culvert carrying S Main ST over Town Br in Polk County, Missouri. It was built in 1900, so it is 125 years old, older 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 2,900 vehicles a day, roughly 3% of them trucks, projected to reach 4,350 by 2044. The structure is 32 ft (9.8 m) long and 75 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesS Main ST
CrossesTown Br
LocationS 1 T 34 N R 23 W
RouteCity Street 0
CountyPolk County
StateMissouri
Coordinates37.61197, -93.41072
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.7 US tons
Inventory rating20.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length32 ft (9.8 m)
Longest span15 ft (4.6 m)
Deck width75 ft (23 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,900 (2024)
Projected traffic4,350 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCity or Municipal 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 S Main ST over Town Br built?

It was built in 1900, making it 125 years old in 2025.

What condition is S Main ST over Town Br 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 April 2024.

How much traffic does S Main ST over Town Br carry?

About 2,900 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is S Main ST over Town Br?

The structure is 32 ft (9.8 m) long with a longest span of 15 ft (4.6 m) and a deck 75 ft wide.

Who owns S Main ST over Town Br?

It is owned by the County Highway Agency and maintained by the City or Municipal Highway Agency.