US Bridges

Rt Zz S over Sampson CR

Fair

Harrison County, Missouri · S 19 T 62 N R 29 W · Structure no. 7839

Built
1955
70 years old, rebuilt 2002
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
176 ft
4 main spans
Daily traffic
112
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Zz S over Sampson CR is a steel stringer/multi-beam or girder carrying Rt Zz S over Sampson CR in Harrison County, Missouri. It was built in 1955 and reconstructed in 2002, so it is 70 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 6 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 112 vehicles a day, roughly 7% of them trucks, projected to reach 146 by 2044. The structure is 176 ft (53.6 m) long and 25 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesRt Zz S
CrossesSampson CR
LocationS 19 T 62 N R 29 W
RouteState Highway 0ZZ
CountyHarrison County
StateMissouri
Coordinates40.15161, -94.20278
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating52.6 US tons
Inventory rating31.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 10
Structure length176 ft (53.6 m)
Longest span50 ft (15.3 m)
Deck width25 ft (7.7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic112 (2024)
Projected traffic146 by 2044
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemNo

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 Rt Zz S over Sampson CR built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 2002.

What condition is Rt Zz S over Sampson CR 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 2023.

How much traffic does Rt Zz S over Sampson CR carry?

About 112 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Rt Zz S over Sampson CR?

The structure is 176 ft (53.6 m) long with a longest span of 50 ft (15.3 m) and a deck 25 ft wide.

Who owns Rt Zz S over Sampson CR?

It is owned by the State Highway Agency.