US Bridges

County RD 621 over Br of Maries Rvr

Fair

Maries County, Missouri · S 30 T 29 N R 10 W · Structure no. 17366

Built
1940
85 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
49 ft
4 main spans
Daily traffic
25
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 621 over Br of Maries Rvr is a concrete slab carrying County RD 621 over Br of Maries Rvr in Maries County, Missouri. It was built in 1940, so it is 85 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 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 25 vehicles a day, roughly 10% of them trucks, projected to reach 30 by 2043. The structure is 49 ft (14.9 m) long and 24 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesCounty RD 621
CrossesBr of Maries Rvr
LocationS 30 T 29 N R 10 W
RouteCounty Highway 150
CountyMaries County
StateMissouri
Coordinates38.07472, -92.06625
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadOther
Structure length49 ft (14.9 m)
Longest span11 ft (3.4 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic30 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 621 over Br of Maries Rvr built?

It was built in 1940, making it 85 years old in 2025.

What condition is County RD 621 over Br of Maries Rvr 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 621 over Br of Maries Rvr carry?

About 25 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 621 over Br of Maries Rvr?

The structure is 49 ft (14.9 m) long with a longest span of 11 ft (3.4 m) and a deck 24 ft wide.

Who owns County RD 621 over Br of Maries Rvr?

It is owned by the County Highway Agency.