US Bridges

Northern ST over Rock CR

Good

Jackson County, Missouri · S 9 T 49 N R 32 W · Structure no. 32818

Built
2008
17 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
100 ft
1 main span
Daily traffic
1,800
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Northern ST over Rock CR is a prestressed concrete stringer/multi-beam or girder carrying Northern ST over Rock CR in Jackson County, Missouri. It was built in 2008, so it is 17 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 1,800 vehicles a day, roughly 5% of them trucks, projected to reach 2,340 by 2044. The structure is 100 ft (30.5 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesNorthern ST
CrossesRock CR
LocationS 9 T 49 N R 32 W
RouteCity Street 0
Coordinates39.07698, -94.45098
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating100.2 US tons
Inventory rating41.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length100 ft (30.5 m)
Longest span94 ft (28.7 m)
Deck width37 ft (11.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2024)
Projected traffic2,340 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Northern ST over Rock CR built?

It was built in 2008, making it 17 years old in 2025.

What condition is Northern ST 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 February 2023.

How much traffic does Northern ST over Rock CR carry?

About 1,800 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Northern ST over Rock CR?

The structure is 100 ft (30.5 m) long with a longest span of 94 ft (28.7 m) and a deck 37 ft wide.

Who owns Northern ST over Rock CR?

It is owned by the City or Municipal Highway Agency.