US Bridges

320 ST over Long Br

Fair

Nodaway County, Missouri · S 18 T 63 N R 34 W · Structure no. 14635

Built
1995
30 years old
Condition
Fair
inspected January 2025
Type
Tee Beam
Prestressed Concrete Continuous
Length
100 ft
3 main spans
Daily traffic
30
2024 count
Owner
County
County Highway Agency

About this bridge

320 ST over Long Br is a prestressed concrete continuous tee beam carrying 320 ST over Long Br in Nodaway 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.

It carries about 30 vehicles a day, roughly 10% of them trucks, projected to reach 35 by 2044. The structure is 100 ft (30.5 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
Carries320 ST
CrossesLong Br
LocationS 18 T 63 N R 34 W
RouteCounty Highway 718
CountyNodaway County
StateMissouri
Coordinates40.25706, -94.76547
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.4 US tons
Inventory rating46.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span33 ft (10.1 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2024)
Projected traffic35 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 320 ST over Long Br built?

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

What condition is 320 ST over Long 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 January 2025.

How much traffic does 320 ST over Long Br carry?

About 30 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is 320 ST over Long Br?

The structure is 100 ft (30.5 m) long with a longest span of 33 ft (10.1 m) and a deck 27 ft wide.

Who owns 320 ST over Long Br?

It is owned by the County Highway Agency.