US Bridges

County RD E-390 over Dry Fk CR

PoorPosted for load

Polk County, Missouri · S 17 T 34 N R 23 W · Structure no. 16860

Built
1900
125 years old, rebuilt 2004
Condition
Poor
inspected April 2024
Type
Girder and Floorbeam System
Steel
Length
43 ft
1 main span
Daily traffic
20
2024 count
Owner
County
County Highway Agency

About this bridge

County RD E-390 over Dry Fk CR is a steel girder and floorbeam system carrying County RD E-390 over Dry Fk CR in Polk County, Missouri. It was built in 1900 and reconstructed in 2004, 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 3 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 20 vehicles a day, roughly 10% of them trucks, projected to reach 29 by 2044. The structure is 43 ft (13.1 m) long and 12 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesCounty RD E-390
CrossesDry Fk CR
LocationS 17 T 34 N R 23 W
RouteCounty Highway 135
Coordinates37.68604, -93.47549
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
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating18.8 US tons
Inventory rating8.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length43 ft (13.1 m)
Longest span41 ft (12.5 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2024)
Projected traffic29 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 E-390 over Dry Fk CR built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 2004.

What condition is County RD E-390 over Dry Fk 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 April 2024.

How much traffic does County RD E-390 over Dry Fk CR carry?

About 20 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD E-390 over Dry Fk CR?

The structure is 43 ft (13.1 m) long with a longest span of 41 ft (12.5 m) and a deck 12 ft wide.

Who owns County RD E-390 over Dry Fk CR?

It is owned by the County Highway Agency.