US Bridges

NW Maple RD over Br of M Fk Lost CR

Fair

DeKalb County, Missouri · S 20 T 60 N R 31 W · Structure no. 15779

Built
1986
39 years old, rebuilt 1998
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
25 ft
1 main span
Daily traffic
15
2024 count
Owner
County
County Highway Agency

About this bridge

NW Maple RD over Br of M Fk Lost CR is a steel stringer/multi-beam or girder carrying NW Maple RD over Br of M Fk Lost CR in DeKalb County, Missouri. It was built in 1986 and reconstructed in 1998, so it is 39 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 15 vehicles a day, roughly 10% of them trucks, projected to reach 17 by 2044. The structure is 25 ft (7.6 m) long and 16 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNW Maple RD
CrossesBr of M Fk Lost CR
LocationS 20 T 60 N R 31 W
RouteCounty Highway 99
CountyDeKalb County
StateMissouri
Coordinates40.00492, -94.39376
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.
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 inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.7 US tons
Inventory rating21.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span24 ft (7.3 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.7 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was NW Maple RD over Br of M Fk Lost CR built?

It was built in 1986, making it 39 years old in 2025. It was reconstructed in 1998.

What condition is NW Maple RD over Br of M Fk Lost 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 December 2024.

How much traffic does NW Maple RD over Br of M Fk Lost CR carry?

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

How long is NW Maple RD over Br of M Fk Lost CR?

The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.3 m) and a deck 16 ft wide.

Who owns NW Maple RD over Br of M Fk Lost CR?

It is owned by the County Highway Agency.