US Bridges

N Troost Ave over Rock CR

FairPosted for load

Clay County, Missouri · S 35 T 51 N R 33 W · Structure no. 25322

Built
1920
105 years old, rebuilt 1993
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete
Length
27 ft
1 main span
Daily traffic
1,125
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

N Troost Ave over Rock CR is a concrete tee beam carrying N Troost Ave over Rock CR in Clay County, Missouri. It was built in 1920 and reconstructed in 1993, so it is 105 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: posted for load restriction.

It carries about 1,125 vehicles a day, roughly 3% of them trucks, projected to reach 1,800 by 2044. The structure is 27 ft (8.2 m) long and 27 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesN Troost Ave
CrossesRock CR
LocationS 35 T 51 N R 33 W
RouteCity Street 0
Coordinates39.18241, -94.56736
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load 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 alignment8: Equal to present desirable criteria
Operating rating42.7 US tons
Inventory rating25.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadOther
Structure length27 ft (8.2 m)
Longest span25 ft (7.6 m)
Deck width27 ft (8.2 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,125 (2024)
Projected traffic1,800 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 N Troost Ave over Rock CR built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1993.

What condition is N Troost Ave over Rock 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 2024.

How much traffic does N Troost Ave over Rock CR carry?

About 1,125 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is N Troost Ave over Rock CR?

The structure is 27 ft (8.2 m) long with a longest span of 25 ft (7.6 m) and a deck 27 ft wide.

Who owns N Troost Ave over Rock CR?

It is owned by the City or Municipal Highway Agency.