US Bridges

NW Fairmont RD over 3rd Fk of Platte R

Fair

DeKalb County, Missouri · S 22 T 59 N R 33 W · Structure no. 21569

Built
1994
31 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
98 ft
3 main spans
Daily traffic
35
2024 count
Owner
County
County Highway Agency

About this bridge

NW Fairmont RD over 3rd Fk of Platte R is a steel stringer/multi-beam or girder carrying NW Fairmont RD over 3rd Fk of Platte R in DeKalb County, Missouri. It was built in 1994, so it is 31 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 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 35 vehicles a day, roughly 10% of them trucks, projected to reach 40 by 2044. The structure is 98 ft (29.9 m) long and 21 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNW Fairmont RD
Crosses3rd Fk of Platte R
LocationS 22 T 59 N R 33 W
RouteCounty Highway 312
CountyDeKalb County
StateMissouri
Coordinates39.90743, -94.59393
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.7 US tons
Inventory rating25.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length98 ft (29.9 m)
Longest span33 ft (10 m)
Deck width21 ft (6.3 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2024)
Projected traffic40 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was NW Fairmont RD over 3rd Fk of Platte R built?

It was built in 1994, making it 31 years old in 2025.

What condition is NW Fairmont RD over 3rd Fk of Platte R 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 NW Fairmont RD over 3rd Fk of Platte R carry?

About 35 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is NW Fairmont RD over 3rd Fk of Platte R?

The structure is 98 ft (29.9 m) long with a longest span of 33 ft (10 m) and a deck 21 ft wide.

Who owns NW Fairmont RD over 3rd Fk of Platte R?

It is owned by the County Highway Agency.