US Bridges

County RD 149 over Rock CR

Good

Atchison County, Missouri · S 2 T 65 N R 41 W · Structure no. 17337

Built
1930
95 years old, rebuilt 1984
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
84 ft
1 main span
Daily traffic
20
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 149 over Rock CR is a steel stringer/multi-beam or girder carrying County RD 149 over Rock CR in Atchison County, Missouri. It was built in 1930 and reconstructed in 1984, so it is 95 years old, older 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 20 vehicles a day, roughly 10% of them trucks, projected to reach 23 by 2044. The structure is 84 ft (25.6 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty RD 149
CrossesRock CR
LocationS 2 T 65 N R 41 W
RouteCounty Highway 149
CountyAtchison County
StateMissouri
Coordinates40.46774, -95.48868
Functional classRural 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.7 US tons
Inventory rating14.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+1 approach)
Design loadOther
Structure length84 ft (25.6 m)
Longest span54 ft (16.4 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2024)
Projected traffic23 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 RD 149 over Rock CR built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1984.

What condition is County RD 149 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 2024.

How much traffic does County RD 149 over Rock CR carry?

About 20 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD 149 over Rock CR?

The structure is 84 ft (25.6 m) long with a longest span of 54 ft (16.4 m) and a deck 20 ft wide.

Who owns County RD 149 over Rock CR?

It is owned by the County Highway Agency.