US Bridges

County RD S-28 over Jumpoff CR

FairPosted for load

Polk County, Missouri · S 29 T 34 N R 24 W · Structure no. 19721

Built
1927
98 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete
Length
45 ft
2 main spans
Daily traffic
30
2024 count
Owner
County
County Highway Agency

About this bridge

County RD S-28 over Jumpoff CR is a concrete tee beam carrying County RD S-28 over Jumpoff CR in Polk County, Missouri. It was built in 1927, so it is 98 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. Its operating status is: posted for load restriction.

It carries about 30 vehicles a day, roughly 10% of them trucks, projected to reach 44 by 2044. The structure is 45 ft (13.7 m) long and 18 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesCounty RD S-28
CrossesJumpoff CR
LocationS 29 T 34 N R 24 W
RouteCounty Highway 231
CountyPolk County
StateMissouri
Coordinates37.65683, -93.57985
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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating14.9 US tons
Inventory rating8.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length45 ft (13.7 m)
Longest span21 ft (6.4 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2024)
Projected traffic44 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$366,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD S-28 over Jumpoff CR built?

It was built in 1927, making it 98 years old in 2025.

What condition is County RD S-28 over Jumpoff 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 April 2024.

How much traffic does County RD S-28 over Jumpoff CR carry?

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

How long is County RD S-28 over Jumpoff CR?

The structure is 45 ft (13.7 m) long with a longest span of 21 ft (6.4 m) and a deck 18 ft wide.

Who owns County RD S-28 over Jumpoff CR?

It is owned by the County Highway Agency.