US Bridges

Post Oak Sch RD over Coon CR

Fair

Montgomery County, Missouri · S 7 T 50 N R 4 W · Structure no. 14167

Built
1981
44 years old
Condition
Fair
inspected January 2025
Type
Tee Beam
Prestressed Concrete Continuous
Length
123 ft
3 main spans
Daily traffic
100
2023 count
Owner
County
County Highway Agency

About this bridge

Post Oak Sch RD over Coon CR is a prestressed concrete continuous tee beam carrying Post Oak Sch RD over Coon CR in Montgomery County, Missouri. It was built in 1981, so it is 44 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 125 by 2043. The structure is 123 ft (37.5 m) long and 21 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesPost Oak Sch RD
CrossesCoon CR
LocationS 7 T 50 N R 4 W
RouteCounty Highway 59
CountyMontgomery County
StateMissouri
Coordinates39.11972, -91.40742
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 inspectionJanuary 2025
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length123 ft (37.5 m)
Longest span40 ft (12.2 m)
Deck width21 ft (6.4 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic125 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 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 Post Oak Sch RD over Coon CR built?

It was built in 1981, making it 44 years old in 2025.

What condition is Post Oak Sch RD over Coon 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 2025.

How much traffic does Post Oak Sch RD over Coon CR carry?

About 100 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Post Oak Sch RD over Coon CR?

The structure is 123 ft (37.5 m) long with a longest span of 40 ft (12.2 m) and a deck 21 ft wide.

Who owns Post Oak Sch RD over Coon CR?

It is owned by the County Highway Agency.