US Bridges

Onyx Ave over Br of Tarkio Rvr

Good

Atchison County, Missouri · S 10 T 63 N R 40 W · Structure no. 24007

Built
1988
37 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
36 ft
1 main span
Daily traffic
20
2024 count
Owner
County
County Highway Agency

About this bridge

Onyx Ave over Br of Tarkio Rvr is a steel stringer/multi-beam or girder carrying Onyx Ave over Br of Tarkio Rvr in Atchison County, Missouri. It was built in 1988, so it is 37 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 20 vehicles a day, roughly 10% of them trucks, projected to reach 23 by 2044. The structure is 36 ft (11 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesOnyx Ave
CrossesBr of Tarkio Rvr
LocationS 10 T 63 N R 40 W
RouteCounty Highway 450
CountyAtchison County
StateMissouri
Coordinates40.28374, -95.39864
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating45.6 US tons
Inventory rating23.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length36 ft (11 m)
Longest span36 ft (11 m)
Deck width25 ft (7.6 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2024)
Projected traffic23 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 Onyx Ave over Br of Tarkio Rvr built?

It was built in 1988, making it 37 years old in 2025.

What condition is Onyx Ave over Br of Tarkio Rvr 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 February 2024.

How much traffic does Onyx Ave over Br of Tarkio Rvr carry?

About 20 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Onyx Ave over Br of Tarkio Rvr?

The structure is 36 ft (11 m) long with a longest span of 36 ft (11 m) and a deck 25 ft wide.

Who owns Onyx Ave over Br of Tarkio Rvr?

It is owned by the County Highway Agency.