US Bridges

County RD 306 over Fredrick CR

Good

Oregon County, Missouri · S 7 T 23 N R 4 W · Structure no. 18250

Built
1989
36 years old
Condition
Good
inspected January 2024
Type
Culvert
Steel
Length
45 ft
8 main spans
Daily traffic
30
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 306 over Fredrick CR is a steel culvert carrying County RD 306 over Fredrick CR in Oregon County, Missouri. It was built in 1989, so it is 36 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 30 vehicles a day, roughly 10% of them trucks, projected to reach 36 by 2044. The structure is 45 ft (13.7 m) long and 22 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesCounty RD 306
CrossesFredrick CR
LocationS 7 T 23 N R 4 W
RouteCounty Highway 178
CountyOregon County
StateMissouri
Coordinates36.6613, -91.4466
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 inspectionJanuary 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans8
Design loadOther
Structure length45 ft (13.7 m)
Longest span4 ft (1.2 m)
Deck width22 ft (6.7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2024)
Projected traffic36 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 County RD 306 over Fredrick CR built?

It was built in 1989, making it 36 years old in 2025.

What condition is County RD 306 over Fredrick 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 January 2024.

How much traffic does County RD 306 over Fredrick CR carry?

About 30 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD 306 over Fredrick CR?

The structure is 45 ft (13.7 m) long with a longest span of 4 ft (1.2 m) and a deck 22 ft wide.

Who owns County RD 306 over Fredrick CR?

It is owned by the County Highway Agency.