US Bridges

Ferry RD over Unknown Creek

Good

Cooper County, Missouri · S 6 T 48 N R 17 W · Structure no. 28514

Built
2000
25 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
100
2024 count
Owner
County
County Highway Agency

About this bridge

Ferry RD over Unknown Creek is a concrete continuous culvert carrying Ferry RD over Unknown Creek in Cooper County, Missouri. It was built in 2000, so it is 25 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 130 by 2044. The structure is 22 ft (6.7 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesFerry RD
CrossesUnknown Creek
LocationS 6 T 48 N R 17 W
RouteCounty Highway 30
Coordinates38.95886, -92.82036
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2023
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 alignment6: Equal to present minimum criteria
Operating rating56.5 US tons
Inventory rating33.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2024)
Projected traffic130 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Ferry RD over Unknown Creek built?

It was built in 2000, making it 25 years old in 2025.

What condition is Ferry RD over Unknown Creek 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 December 2023.

How much traffic does Ferry RD over Unknown Creek carry?

About 100 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Ferry RD over Unknown Creek?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 26 ft wide.

Who owns Ferry RD over Unknown Creek?

It is owned by the County Highway Agency.