US Bridges

Clark ST over NS RR

FairPosted for load

Audrain County, Missouri · S 26 T 51 N R 9 W · Structure no. 20884

Built
1995
30 years old
Condition
Fair
inspected March 2023
Type
Truss - Thru
Steel
Length
142 ft
1 main span
Daily traffic
8,000
2023 count
Owner
County
County Highway Agency

About this bridge

Clark ST over NS RR is a steel truss - thru carrying Clark ST over NS RR in Audrain County, Missouri. It was built in 1995, so it is 30 years old, younger 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. Its operating status is: posted for load restriction.

It carries about 8,000 vehicles a day, roughly 20% of them trucks, projected to reach 10,800 by 2043. The structure is 142 ft (43.3 m) long and 25 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesClark ST
CrossesNS RR
LocationS 26 T 51 N R 9 W
RouteCity Street 0
CountyAudrain County
StateMissouri
Coordinates39.17017, -91.88514
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34.7 US tons
Inventory rating11.9 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length142 ft (43.3 m)
Longest span140 ft (42.7 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,000 (2023)
Projected traffic10,800 by 2043
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed0.6 mi (1 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$1.7 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Clark ST over NS RR built?

It was built in 1995, making it 30 years old in 2025.

What condition is Clark ST over NS RR 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 March 2023.

How much traffic does Clark ST over NS RR carry?

About 8,000 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is Clark ST over NS RR?

The structure is 142 ft (43.3 m) long with a longest span of 140 ft (42.7 m) and a deck 25 ft wide.

Who owns Clark ST over NS RR?

It is owned by the County Highway Agency.