US Bridges

County Line RD over Pin Oak CR

Fair

Franklin County, Missouri · S 27 T 43 N R 4 W · Structure no. 18093

Built
1999
26 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
90 ft
1 main span
Daily traffic
75
2023 count
Owner
County
County Highway Agency

About this bridge

County Line RD over Pin Oak CR is a prestressed concrete stringer/multi-beam or girder carrying County Line RD over Pin Oak CR in Franklin County, Missouri. It was built in 1999, so it is 26 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 75 vehicles a day, roughly 10% of them trucks, projected to reach 135 by 2043. The structure is 90 ft (27.4 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCounty Line RD
CrossesPin Oak CR
LocationS 27 T 43 N R 4 W
RouteCounty Highway 173
CountyFranklin County
StateMissouri
Coordinates38.44207, -91.36136
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.4 US tons
Inventory rating42.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span87 ft (26.5 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2023)
Projected traffic135 by 2043
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Line RD over Pin Oak CR built?

It was built in 1999, making it 26 years old in 2025.

What condition is County Line RD over Pin Oak 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 March 2023.

How much traffic does County Line RD over Pin Oak CR carry?

About 75 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County Line RD over Pin Oak CR?

The structure is 90 ft (27.4 m) long with a longest span of 87 ft (26.5 m) and a deck 27 ft wide.

Who owns County Line RD over Pin Oak CR?

It is owned by the County Highway Agency.