US Bridges

Is 29 N over Lit Tarkio CR

Poor

Holt County, Missouri · S 17 T 62 N R 39 W · Structure no. 1602

Built
1972
53 years old
Condition
Poor
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
356 ft
3 main spans
Daily traffic
8,637
2024 count
Owner
State
State Highway Agency

About this bridge

Is 29 N over Lit Tarkio CR is a steel continuous stringer/multi-beam or girder carrying Is 29 N over Lit Tarkio CR in Holt County, Missouri. It was built in 1972, so it is 53 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 8,637 vehicles a day, roughly 36% of them trucks, projected to reach 18,138 by 2044. The structure is 356 ft (108.5 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIs 29 N
CrossesLit Tarkio CR
LocationS 17 T 62 N R 39 W
RouteInterstate 29
Coordinates40.18476, -95.33139
Functional classRural Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating28.8 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length356 ft (108.5 m)
Longest span138 ft (42.1 m)
Deck width42 ft (12.9 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,637 (2024)
Projected traffic18,138 by 2044
Trucks36%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Is 29 N over Lit Tarkio CR built?

It was built in 1972, making it 53 years old in 2025.

What condition is Is 29 N over Lit Tarkio CR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2023.

How much traffic does Is 29 N over Lit Tarkio CR carry?

About 8,637 vehicles per day (2024 count), of which roughly 36% are trucks.

How long is Is 29 N over Lit Tarkio CR?

The structure is 356 ft (108.5 m) long with a longest span of 138 ft (42.1 m) and a deck 42 ft wide.

Who owns Is 29 N over Lit Tarkio CR?

It is owned by the State Highway Agency.