US Bridges

SW Gridley RD over Br of Third Fk

Fair

DeKalb County, Missouri · S 26 T 58 N R 33 W · Structure no. 22655

Built
1930
95 years old, rebuilt 2013
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
24 ft
1 main span
Daily traffic
5
2024 count
Owner
County
County Highway Agency

About this bridge

SW Gridley RD over Br of Third Fk is a steel stringer/multi-beam or girder carrying SW Gridley RD over Br of Third Fk in DeKalb County, Missouri. It was built in 1930 and reconstructed in 2013, so it is 95 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 5 vehicles a day, roughly 10% of them trucks, projected to reach 6 by 2044. The structure is 24 ft (7.3 m) long and 15 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSW Gridley RD
CrossesBr of Third Fk
LocationS 26 T 58 N R 33 W
RouteCounty Highway 367
CountyDeKalb County
StateMissouri
Coordinates39.80552, -94.57093
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
Deck9 ExcellentNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.6 US tons
Inventory rating27.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length24 ft (7.3 m)
Longest span22 ft (6.7 m)
Deck width15 ft (4.5 m)
Roadway width14 ft (4.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2024)
Projected traffic6 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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SW Gridley RD over Br of Third Fk built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 2013.

What condition is SW Gridley RD over Br of Third Fk 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 SW Gridley RD over Br of Third Fk carry?

About 5 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is SW Gridley RD over Br of Third Fk?

The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.7 m) and a deck 15 ft wide.

Who owns SW Gridley RD over Br of Third Fk?

It is owned by the County Highway Agency.