US Bridges

170th Road over Marlowe CR

Fair

Worth County, Missouri · S 31 T 66 N R 31 W · Structure no. 15968

Built
1992
33 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
81 ft
1 main span
Daily traffic
20
2024 count
Owner
County
County Highway Agency

About this bridge

170th Road over Marlowe CR is a steel stringer/multi-beam or girder carrying 170th Road over Marlowe CR in Worth County, Missouri. It was built in 1992, so it is 33 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 20 vehicles a day, roughly 10% of them trucks, projected to reach 23 by 2044. The structure is 81 ft (24.7 m) long and 18 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries170th Road
CrossesMarlowe CR
LocationS 31 T 66 N R 31 W
RouteCounty Highway 105
CountyWorth County
StateMissouri
Coordinates40.47079, -94.44787
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41.7 US tons
Inventory rating23.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length81 ft (24.7 m)
Longest span80 ft (24.4 m)
Deck width18 ft (5.5 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2024)
Projected traffic23 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 170th Road over Marlowe CR built?

It was built in 1992, making it 33 years old in 2025.

What condition is 170th Road over Marlowe 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 170th Road over Marlowe CR carry?

About 20 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is 170th Road over Marlowe CR?

The structure is 81 ft (24.7 m) long with a longest span of 80 ft (24.4 m) and a deck 18 ft wide.

Who owns 170th Road over Marlowe CR?

It is owned by the County Highway Agency.