US Bridges

County RD 621 over Maries Rvr

FairPosted for load

Maries County, Missouri · S 29 T 39 N R 10 W · Structure no. 17380

Built
1930
95 years old
Condition
Fair
inspected April 2023
Type
Tee Beam
Concrete
Length
64 ft
2 main spans
Daily traffic
25
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 621 over Maries Rvr is a concrete tee beam carrying County RD 621 over Maries Rvr in Maries County, Missouri. It was built in 1930, so it is 95 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. Its operating status is: posted for load restriction.

It carries about 25 vehicles a day, roughly 10% of them trucks, projected to reach 30 by 2043. The structure is 64 ft (19.5 m) long and 20 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesCounty RD 621
CrossesMaries Rvr
LocationS 29 T 39 N R 10 W
RouteCounty Highway 150
CountyMaries County
StateMissouri
Coordinates38.07283, -92.05633
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 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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating23.8 US tons
Inventory rating8.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length64 ft (19.5 m)
Longest span30 ft (9.1 m)
Deck width20 ft (6.2 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic30 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$494,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 621 over Maries Rvr built?

It was built in 1930, making it 95 years old in 2025.

What condition is County RD 621 over 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 Maries Rvr carry?

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

How long is County RD 621 over Maries Rvr?

The structure is 64 ft (19.5 m) long with a longest span of 30 ft (9.1 m) and a deck 20 ft wide.

Who owns County RD 621 over Maries Rvr?

It is owned by the County Highway Agency.