US Bridges

Mo 13 S over Dry Sac Rvr Br

Fair

Polk County, Missouri · S 9 T 31 N R 22 W · Structure no. 2429

Built
1973
52 years old, rebuilt 2009
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
31 ft
2 main spans
Daily traffic
22,761
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 13 S over Dry Sac Rvr Br is a concrete continuous culvert carrying Mo 13 S over Dry Sac Rvr Br in Polk County, Missouri. It was built in 1973 and reconstructed in 2009, so it is 52 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 5 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 22,761 vehicles a day, roughly 15% of them trucks, projected to reach 39,832 by 2044. The structure is 31 ft (9.3 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMo 13 S
CrossesDry Sac Rvr Br
LocationS 9 T 31 N R 22 W
RouteState Highway 13
CountyPolk County
StateMissouri
Coordinates37.43299, -93.35561
Functional classRural Principal Arterial - Other

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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.2 US tons
Inventory rating57.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length31 ft (9.3 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,761 (2024)
Projected traffic39,832 by 2044
Trucks15%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Mo 13 S over Dry Sac Rvr Br built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2009.

What condition is Mo 13 S over Dry Sac Rvr 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 November 2023.

How much traffic does Mo 13 S over Dry Sac Rvr Br carry?

About 22,761 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is Mo 13 S over Dry Sac Rvr Br?

The structure is 31 ft (9.3 m) long with a longest span of 12 ft (3.7 m).

Who owns Mo 13 S over Dry Sac Rvr Br?

It is owned by the State Highway Agency.