US Bridges

Westport RD over Rock CR

Good

Jackson County, Missouri · S 9 T 49 N R 32 W · Structure no. 19141

Built
1992
33 years old
Condition
Good
inspected January 2023
Type
Culvert
Concrete
Length
49 ft
3 main spans
Daily traffic
6,106
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Westport RD over Rock CR is a concrete culvert carrying Westport RD over Rock CR in Jackson 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,106 vehicles a day, roughly 10% of them trucks, projected to reach 7,938 by 2044. The structure is 49 ft (14.9 m) long and 45 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesWestport RD
CrossesRock CR
LocationS 9 T 49 N R 32 W
RouteCity Street 0
CountyJackson County
StateMissouri
Coordinates39.07978, -94.45318
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length49 ft (14.9 m)
Longest span16 ft (5 m)
Deck width45 ft (13.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,106 (2024)
Projected traffic7,938 by 2044
Trucks10%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$153,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Westport RD over Rock CR built?

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

What condition is Westport RD over Rock CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2023.

How much traffic does Westport RD over Rock CR carry?

About 6,106 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Westport RD over Rock CR?

The structure is 49 ft (14.9 m) long with a longest span of 16 ft (5 m) and a deck 45 ft wide.

Who owns Westport RD over Rock CR?

It is owned by the City or Municipal Highway Agency.