US Bridges

County RD 824 over Trib of Long Br

Good

Audrain County, Missouri · S 8 T 50 N R 8 W · Structure no. 36373

Built
2019
6 years old
Condition
Good
inspected April 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
51 ft
1 main span
Daily traffic
10
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 824 over Trib of Long Br is a concrete box beam or girders - multiple carrying County RD 824 over Trib of Long Br in Audrain County, Missouri. It was built in 2019, so it is 6 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 10 vehicles a day, roughly 10% of them trucks, projected to reach 13 by 2043. The structure is 51 ft (15.5 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCounty RD 824
CrossesTrib of Long Br
LocationS 8 T 50 N R 8 W
RouteCounty Highway 824
CountyAudrain County
StateMissouri
Coordinates39.11981, -91.83211
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.3 US tons
Inventory rating70.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckOther
Main spans1
Design loadHL 93
Structure length51 ft (15.5 m)
Longest span51 ft (15.5 m)
Deck width26 ft (7.8 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2023)
Projected traffic13 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 824 over Trib of Long Br built?

It was built in 2019, making it 6 years old in 2025.

What condition is County RD 824 over Trib of Long 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 April 2023.

How much traffic does County RD 824 over Trib of Long Br carry?

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

How long is County RD 824 over Trib of Long Br?

The structure is 51 ft (15.5 m) long with a longest span of 51 ft (15.5 m) and a deck 26 ft wide.

Who owns County RD 824 over Trib of Long Br?

It is owned by the County Highway Agency.