US Bridges

Arrow Rock RD over Trib to Missouri R

Fair

Cooper County, Missouri · S 7 T 49 N R 18 W · Structure no. 12243

Built
1990
35 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
61 ft
1 main span
Daily traffic
25
2024 count
Owner
County
County Highway Agency

About this bridge

Arrow Rock RD over Trib to Missouri R is a steel stringer/multi-beam or girder carrying Arrow Rock RD over Trib to Missouri R in Cooper County, Missouri. It was built in 1990, so it is 35 years old, younger 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.

It carries about 25 vehicles a day, roughly 10% of them trucks, projected to reach 33 by 2044. The structure is 61 ft (18.6 m) long and 20 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesArrow Rock RD
CrossesTrib to Missouri R
LocationS 7 T 49 N R 18 W
RouteCounty Highway 3
CountyCooper County
StateMissouri
Coordinates39.02633, -92.92553
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 alignment6: Equal to present minimum criteria
Operating rating51.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length61 ft (18.6 m)
Longest span58 ft (17.7 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2024)
Projected traffic33 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Arrow Rock RD over Trib to Missouri R built?

It was built in 1990, making it 35 years old in 2025.

What condition is Arrow Rock RD over Trib to Missouri R 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 December 2023.

How much traffic does Arrow Rock RD over Trib to Missouri R carry?

About 25 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Arrow Rock RD over Trib to Missouri R?

The structure is 61 ft (18.6 m) long with a longest span of 58 ft (17.7 m) and a deck 20 ft wide.

Who owns Arrow Rock RD over Trib to Missouri R?

It is owned by the County Highway Agency.