US Bridges

County RD 4004 over Rocky Br

Good

Callaway County, Missouri · S 36 T 45 N R 10 W · Structure no. 31060

Built
2005
20 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
76 ft
1 main span
Daily traffic
40
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 4004 over Rocky Br is a steel stringer/multi-beam or girder carrying County RD 4004 over Rocky Br in Callaway County, Missouri. It was built in 2005, so it is 20 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 40 vehicles a day, roughly 5% of them trucks, projected to reach 60 by 2043. The structure is 76 ft (23.2 m) long and 25 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesCounty RD 4004
CrossesRocky Br
LocationS 36 T 45 N R 10 W
RouteCounty Highway 242
CountyCallaway County
StateMissouri
Coordinates38.63512, -92.00457
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating91.3 US tons
Inventory rating54.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span75 ft (22.9 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2023)
Projected traffic60 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 County RD 4004 over Rocky Br built?

It was built in 2005, making it 20 years old in 2025.

What condition is County RD 4004 over Rocky Br 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 October 2024.

How much traffic does County RD 4004 over Rocky Br carry?

About 40 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is County RD 4004 over Rocky Br?

The structure is 76 ft (23.2 m) long with a longest span of 75 ft (22.9 m) and a deck 25 ft wide.

Who owns County RD 4004 over Rocky Br?

It is owned by the County Highway Agency.