US Bridges

Timber RD over Unnamed CR

Good

Sullivan County, Missouri · S 10 T 16 N R 21 W · Structure no. 29224

Built
2001
24 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
79 ft
1 main span
Daily traffic
15
2024 count
Owner
County
County Highway Agency

About this bridge

Timber RD over Unnamed CR is a steel stringer/multi-beam or girder carrying Timber RD over Unnamed CR in Sullivan County, Missouri. It was built in 2001, so it is 24 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 15 vehicles a day, roughly 10% of them trucks, projected to reach 17 by 2044. The structure is 79 ft (24.2 m) long and 20 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesTimber RD
CrossesUnnamed CR
LocationS 10 T 16 N R 21 W
RouteCounty Highway 417
Coordinates40.10097, -93.23736
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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71.4 US tons
Inventory rating40.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length79 ft (24.2 m)
Longest span78 ft (23.9 m)
Deck width20 ft (6 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2024)
Projected traffic17 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Timber RD over Unnamed CR built?

It was built in 2001, making it 24 years old in 2025.

What condition is Timber RD over Unnamed 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 November 2023.

How much traffic does Timber RD over Unnamed CR carry?

About 15 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Timber RD over Unnamed CR?

The structure is 79 ft (24.2 m) long with a longest span of 78 ft (23.9 m) and a deck 20 ft wide.

Who owns Timber RD over Unnamed CR?

It is owned by the County Highway Agency.