US Bridges

Is 29 N over Platte Rvr Ovrfl

Fair

Platte County, Missouri · S 25 T 53 N R 35 W · Structure no. 164

Built
1959
66 years old, rebuilt 2007
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
403 ft
6 main spans
Daily traffic
26,656
2024 count
Owner
State
State Highway Agency

About this bridge

Is 29 N over Platte Rvr Ovrfl is a steel continuous stringer/multi-beam or girder carrying Is 29 N over Platte Rvr Ovrfl in Platte County, Missouri. It was built in 1959 and reconstructed in 2007, so it is 66 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 26,656 vehicles a day, roughly 19% of them trucks, projected to reach 54,645 by 2044. The structure is 403 ft (122.8 m) long and 33 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIs 29 N
CrossesPlatte Rvr Ovrfl
LocationS 25 T 53 N R 35 W
RouteInterstate 29
Coordinates39.37974, -94.78382
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.4 US tons
Inventory rating48.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6 (+2 approach)
Design loadHS 20
Structure length403 ft (122.8 m)
Longest span60 ft (18.3 m)
Deck width33 ft (10.2 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,656 (2024)
Projected traffic54,645 by 2044
Trucks19%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRelief for waterway
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 Platte Rvr Ovrfl built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2007.

What condition is Is 29 N over Platte Rvr Ovrfl in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does Is 29 N over Platte Rvr Ovrfl carry?

About 26,656 vehicles per day (2024 count), of which roughly 19% are trucks.

How long is Is 29 N over Platte Rvr Ovrfl?

The structure is 403 ft (122.8 m) long with a longest span of 60 ft (18.3 m) and a deck 33 ft wide.

Who owns Is 29 N over Platte Rvr Ovrfl?

It is owned by the State Highway Agency.