US Bridges

County RD 407 over Dry Fk CR

Fair

Maries County, Missouri · S 36 T 41 N R 7 W · Structure no. 14610

Built
1991
34 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
23 ft
3 main spans
Daily traffic
30
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 407 over Dry Fk CR is a concrete slab carrying County RD 407 over Dry Fk CR in Maries County, Missouri. It was built in 1991, so it is 34 years old, younger 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 6 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 36 by 2043. The structure is 23 ft (7 m) long and 18 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesCounty RD 407
CrossesDry Fk CR
LocationS 36 T 41 N R 7 W
RouteCounty Highway 71
CountyMaries County
StateMissouri
Coordinates38.25139, -91.662
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34.7 US tons
Inventory rating27.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length23 ft (7 m)
Longest span6 ft (1.8 m)
Deck width18 ft (5.6 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic36 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$162,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 407 over Dry Fk CR built?

It was built in 1991, making it 34 years old in 2025.

What condition is County RD 407 over Dry Fk 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 2023.

How much traffic does County RD 407 over Dry Fk CR carry?

About 30 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 407 over Dry Fk CR?

The structure is 23 ft (7 m) long with a longest span of 6 ft (1.8 m) and a deck 18 ft wide.

Who owns County RD 407 over Dry Fk CR?

It is owned by the County Highway Agency.