US Bridges

County RD 6410 over Spring CR

PoorPosted for load

Phelps County, Missouri · S 25 T 35 N R 10 W · Structure no. 19313

Built
1900
125 years old
Condition
Poor
inspected November 2023
Type
Slab
Concrete Continuous
Length
188 ft
9 main spans
Daily traffic
35
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 6410 over Spring CR is a concrete continuous slab carrying County RD 6410 over Spring CR 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 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. Its operating status is: posted for load restriction.

It carries about 35 vehicles a day, roughly 10% of them trucks, projected to reach 46 by 2044. The structure is 188 ft (57.3 m) long and 15 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesCounty RD 6410
CrossesSpring CR
LocationS 25 T 35 N R 10 W
RouteCounty Highway 217
CountyPhelps County
StateMissouri
Coordinates37.7208, -91.9872
Functional classRural Local

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
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.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating21.8 US tons
Inventory rating10.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadOther
Structure length188 ft (57.3 m)
Longest span21 ft (6.4 m)
Deck width15 ft (4.6 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2024)
Projected traffic46 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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$1.2 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 6410 over Spring CR built?

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

What condition is County RD 6410 over Spring 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 County RD 6410 over Spring CR carry?

About 35 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD 6410 over Spring CR?

The structure is 188 ft (57.3 m) long with a longest span of 21 ft (6.4 m) and a deck 15 ft wide.

Who owns County RD 6410 over Spring CR?

It is owned by the County Highway Agency.