US Bridges

County RD 5120 over Lit Dry Fk

Fair

Phelps County, Missouri · S 30 T 37 N R 7 W · Structure no. 17279

Built
1900
125 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete
Length
69 ft
3 main spans
Daily traffic
30
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 5120 over Lit Dry Fk is a concrete slab carrying County RD 5120 over Lit Dry Fk in Phelps County, Missouri. It was built in 1900, so it is 125 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 30 vehicles a day, roughly 10% of them trucks, projected to reach 39 by 2044. The structure is 69 ft (21 m) long and 14 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesCounty RD 5120
CrossesLit Dry Fk
LocationS 30 T 37 N R 7 W
RouteCounty Highway 147
CountyPhelps County
StateMissouri
Coordinates37.9012, -91.7308
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3 (+1 approach)
Design loadOther
Structure length69 ft (21 m)
Longest span18 ft (5.5 m)
Deck width14 ft (4.2 m)
Roadway width12 ft (3.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2024)
Projected traffic39 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$527,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 5120 over Lit Dry Fk built?

It was built in 1900, making it 125 years old in 2025.

What condition is County RD 5120 over Lit Dry Fk 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 November 2023.

How much traffic does County RD 5120 over Lit Dry Fk carry?

About 30 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD 5120 over Lit Dry Fk?

The structure is 69 ft (21 m) long with a longest span of 18 ft (5.5 m) and a deck 14 ft wide.

Who owns County RD 5120 over Lit Dry Fk?

It is owned by the County Highway Agency.