US Bridges

Nation RD over Gilmore CR

Fair

Clay County, Missouri · S 21 T 53 N R 31 W · Structure no. 13422

Built
1993
32 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
72 ft
1 main span
Daily traffic
1,084
2024 count
Owner
County
County Highway Agency

About this bridge

Nation RD over Gilmore CR is a steel stringer/multi-beam or girder carrying Nation RD over Gilmore CR in Clay County, Missouri. It was built in 1993, so it is 32 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 1,084 vehicles a day, roughly 10% of them trucks, projected to reach 1,680 by 2044. The structure is 72 ft (21.9 m) long and 29 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesNation RD
CrossesGilmore CR
LocationS 21 T 53 N R 31 W
RouteCounty Highway 38
CountyClay County
StateMissouri
Coordinates39.39439, -94.39364
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.6 US tons
Inventory rating27.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length72 ft (21.9 m)
Longest span70 ft (21.3 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,084 (2024)
Projected traffic1,680 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Nation RD over Gilmore CR built?

It was built in 1993, making it 32 years old in 2025.

What condition is Nation RD over Gilmore CR 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 2024.

How much traffic does Nation RD over Gilmore CR carry?

About 1,084 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Nation RD over Gilmore CR?

The structure is 72 ft (21.9 m) long with a longest span of 70 ft (21.3 m) and a deck 29 ft wide.

Who owns Nation RD over Gilmore CR?

It is owned by the County Highway Agency.