US Bridges

320 TH ST over Br of W Fk Grand R

PoorPosted for load

Gentry County, Missouri · S 23 T 63 N R 32 W · Structure no. 19993

Built
1978
47 years old, rebuilt 1997
Condition
Poor
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
57 ft
1 main span
Daily traffic
15
2024 count
Owner
County
County Highway Agency

About this bridge

320 TH ST over Br of W Fk Grand R is a steel stringer/multi-beam or girder carrying 320 TH ST over Br of W Fk Grand R in Gentry County, Missouri. It was built in 1978 and reconstructed in 1997, so it is 47 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 15 vehicles a day, roughly 10% of them trucks, projected to reach 17 by 2044. The structure is 57 ft (17.4 m) long and 16 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries320 TH ST
CrossesBr of W Fk Grand R
LocationS 23 T 63 N R 32 W
RouteCounty Highway 243
Coordinates40.25606, -94.47157
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating11.9 US tons
Inventory rating6.9 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1 (+1 approach)
Design loadOther
Structure length57 ft (17.4 m)
Longest span38 ft (11.6 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2024)
Projected traffic17 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$438,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 320 TH ST over Br of W Fk Grand R built?

It was built in 1978, making it 47 years old in 2025. It was reconstructed in 1997.

What condition is 320 TH ST over Br of W Fk Grand R in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2023.

How much traffic does 320 TH ST over Br of W Fk Grand R carry?

About 15 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is 320 TH ST over Br of W Fk Grand R?

The structure is 57 ft (17.4 m) long with a longest span of 38 ft (11.6 m) and a deck 16 ft wide.

Who owns 320 TH ST over Br of W Fk Grand R?

It is owned by the County Highway Agency.