US Bridges

County RD 311 over Crooked CR

Fair

Monroe County, Missouri · S 2 T 55 N R 10 W · Structure no. 23525

Built
1988
37 years old
Condition
Fair
inspected May 2024
Type
Girder and Floorbeam System
Steel
Length
100 ft
1 main span
Daily traffic
50
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 311 over Crooked CR is a steel girder and floorbeam system carrying County RD 311 over Crooked CR in Monroe County, Missouri. It was built in 1988, so it is 37 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 50 vehicles a day, roughly 10% of them trucks, projected to reach 63 by 2043. The structure is 100 ft (30.5 m) long and 18 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesCounty RD 311
CrossesCrooked CR
LocationS 2 T 55 N R 10 W
RouteCounty Highway 412
CountyMonroe County
StateMissouri
Coordinates39.585, -91.99353
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.7 US tons
Inventory rating18.8 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+1 approach)
Design loadOther
Structure length100 ft (30.5 m)
Longest span80 ft (24.4 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic63 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$483,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 311 over Crooked CR built?

It was built in 1988, making it 37 years old in 2025.

What condition is County RD 311 over Crooked CR 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 May 2024.

How much traffic does County RD 311 over Crooked CR carry?

About 50 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 311 over Crooked CR?

The structure is 100 ft (30.5 m) long with a longest span of 80 ft (24.4 m) and a deck 18 ft wide.

Who owns County RD 311 over Crooked CR?

It is owned by the County Highway Agency.