US Bridges

Lanter LN over Martin CR

FairClosed to traffic

Platte County, Missouri · S 36 T 52 N R 35 W · Structure no. 18552

Built
1960
65 years old
Condition
Fair
inspected April 2020
Type
Stringer/Multi-beam or Girder
Steel
Length
29 ft
1 main span
Daily traffic
120
2024 count
Owner
County
County Highway Agency

About this bridge

Lanter LN over Martin CR is a steel stringer/multi-beam or girder carrying Lanter LN over Martin CR in Platte County, Missouri. It was built in 1960, so it is 65 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. Its operating status is: closed to all traffic.

It carries about 120 vehicles a day, roughly 10% of them trucks, projected to reach 222 by 2044. The structure is 29 ft (8.8 m) long and 20 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesLanter LN
CrossesMartin CR
LocationS 36 T 52 N R 35 W
RouteCounty Highway 189
CountyPlatte County
StateMissouri
Coordinates39.28172, -94.78951
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2020
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourFoundations stable; scour above top of footing
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length29 ft (8.8 m)
Longest span28 ft (8.5 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2024)
Projected traffic222 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$272,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Lanter LN over Martin CR built?

It was built in 1960, making it 65 years old in 2025.

What condition is Lanter LN over Martin 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 April 2020.

How much traffic does Lanter LN over Martin CR carry?

About 120 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Lanter LN over Martin CR?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.5 m) and a deck 20 ft wide.

Who owns Lanter LN over Martin CR?

It is owned by the County Highway Agency.