US Bridges

County RD E-515 over Br of Slagle CR

FairPosted for load

Polk County, Missouri · S 16 T 32 N R 22 W · Structure no. 21839

Built
1900
125 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
36 ft
2 main spans
Daily traffic
150
2024 count
Owner
County
County Highway Agency

About this bridge

County RD E-515 over Br of Slagle CR is a concrete culvert carrying County RD E-515 over Br of Slagle CR in Polk 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. Its operating status is: posted for load restriction.

It carries about 150 vehicles a day, roughly 10% of them trucks, projected to reach 218 by 2044. The structure is 36 ft (11 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty RD E-515
CrossesBr of Slagle CR
LocationS 16 T 32 N R 22 W
RouteCounty Highway 326
CountyPolk County
StateMissouri
Coordinates37.50141, -93.3531
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating11.9 US tons
Inventory rating6.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadOther
Structure length36 ft (11 m)
Longest span18 ft (5.5 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2024)
Projected traffic218 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$225,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD E-515 over Br of Slagle CR built?

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

What condition is County RD E-515 over Br of Slagle 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 June 2024.

How much traffic does County RD E-515 over Br of Slagle CR carry?

About 150 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD E-515 over Br of Slagle CR?

The structure is 36 ft (11 m) long with a longest span of 18 ft (5.5 m) and a deck 26 ft wide.

Who owns County RD E-515 over Br of Slagle CR?

It is owned by the County Highway Agency.