US Bridges

Flag DR over Unnamed Stream

Good

Sullivan County, Missouri · S 7 T 61 N R 19 W · Structure no. 32635

Built
2008
17 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
75 ft
1 main span
Daily traffic
5
2024 count
Owner
County
County Highway Agency

About this bridge

Flag DR over Unnamed Stream is a steel stringer/multi-beam or girder carrying Flag DR over Unnamed Stream in Sullivan County, Missouri. It was built in 2008, so it is 17 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5 vehicles a day, roughly 10% of them trucks, projected to reach 6 by 2044. The structure is 75 ft (22.9 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFlag DR
CrossesUnnamed Stream
LocationS 7 T 61 N R 19 W
RouteCounty Highway 374
CountySullivan County
StateMissouri
Coordinates40.09938, -93.06323
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
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 evaluation8: Equal to present desirable 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 rating102.2 US tons
Inventory rating60.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length75 ft (22.9 m)
Longest span73 ft (22.3 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2024)
Projected traffic6 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Flag DR over Unnamed Stream built?

It was built in 2008, making it 17 years old in 2025.

What condition is Flag DR over Unnamed Stream 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 Flag DR over Unnamed Stream carry?

About 5 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Flag DR over Unnamed Stream?

The structure is 75 ft (22.9 m) long with a longest span of 73 ft (22.3 m) and a deck 20 ft wide.

Who owns Flag DR over Unnamed Stream?

It is owned by the County Highway Agency.