US Bridges

Plymouth Ave over Br Rvr Des Peres

Fair

St. Louis County, Missouri · S 1 T 45 N R 6 E · Structure no. 24032

Built
1950
75 years old, rebuilt 1998
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
1,000
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Plymouth Ave over Br Rvr Des Peres is a concrete culvert carrying Plymouth Ave over Br Rvr Des Peres in St. Louis County, Missouri. It was built in 1950 and reconstructed in 1998, so it is 75 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 5 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 1,000 vehicles a day, roughly 5% of them trucks, projected to reach 1,350 by 2043. The structure is 25 ft (7.6 m) long and 36 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesPlymouth Ave
CrossesBr Rvr Des Peres
LocationS 1 T 45 N R 6 E
RouteCity Street 0
CountySt. Louis County
StateMissouri
Coordinates38.66863, -90.29548
Functional classUrban 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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating24.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 20
Structure length25 ft (7.6 m)
Longest span5 ft (1.5 m)
Deck width36 ft (11.1 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2023)
Projected traffic1,350 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$153,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Plymouth Ave over Br Rvr Des Peres built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1998.

What condition is Plymouth Ave over Br Rvr Des Peres 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 January 2024.

How much traffic does Plymouth Ave over Br Rvr Des Peres carry?

About 1,000 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Plymouth Ave over Br Rvr Des Peres?

The structure is 25 ft (7.6 m) long with a longest span of 5 ft (1.5 m) and a deck 36 ft wide.

Who owns Plymouth Ave over Br Rvr Des Peres?

It is owned by the City or Municipal Highway Agency.