US Bridges

County RD 320 over Dry Fk CR

Good

Maries County, Missouri · S 25 T 40 N R 8 W · Structure no. 35403

Built
2017
8 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
136 ft
3 main spans
Daily traffic
53
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 320 over Dry Fk CR is a prestressed concrete continuous stringer/multi-beam or girder carrying County RD 320 over Dry Fk CR in Maries County, Missouri. It was built in 2017, so it is 8 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 53 vehicles a day, roughly 10% of them trucks, projected to reach 64 by 2043. The structure is 136 ft (41.5 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty RD 320
CrossesDry Fk CR
LocationS 25 T 40 N R 8 W
RouteCounty Highway 113
CountyMaries County
StateMissouri
Coordinates38.17389, -91.765
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.5 US tons
Inventory rating36.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length136 ft (41.5 m)
Longest span48 ft (14.6 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic53 (2023)
Projected traffic64 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 320 over Dry Fk CR built?

It was built in 2017, making it 8 years old in 2025.

What condition is County RD 320 over Dry Fk CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.

How much traffic does County RD 320 over Dry Fk CR carry?

About 53 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 320 over Dry Fk CR?

The structure is 136 ft (41.5 m) long with a longest span of 48 ft (14.6 m) and a deck 26 ft wide.

Who owns County RD 320 over Dry Fk CR?

It is owned by the County Highway Agency.