US Bridges

Meramec Blvd over Clifty CR

FairPosted for load

St. Louis County, Missouri · S 36 T 44 N R 3 E · Structure no. 16890

Built
1978
47 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete Continuous
Length
40 ft
3 main spans
Daily traffic
800
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Meramec Blvd over Clifty CR is a concrete continuous slab carrying Meramec Blvd over Clifty CR in St. Louis County, Missouri. It was built in 1978, so it is 47 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. Its operating status is: posted for load restriction.

It carries about 800 vehicles a day, roughly 1% of them trucks, projected to reach 1,080 by 2043. The structure is 40 ft (12.2 m) long and 47 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMeramec Blvd
CrossesClifty CR
LocationS 36 T 44 N R 3 E
RouteCity Street 0
CountySt. Louis County
StateMissouri
Coordinates38.51628, -90.64172
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.8 US tons
Inventory rating13.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length40 ft (12.2 m)
Longest span13 ft (4 m)
Deck width47 ft (14.3 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic800 (2023)
Projected traffic1,080 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Meramec Blvd over Clifty CR built?

It was built in 1978, making it 47 years old in 2025.

What condition is Meramec Blvd over Clifty 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 November 2023.

How much traffic does Meramec Blvd over Clifty CR carry?

About 800 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Meramec Blvd over Clifty CR?

The structure is 40 ft (12.2 m) long with a longest span of 13 ft (4 m) and a deck 47 ft wide.

Who owns Meramec Blvd over Clifty CR?

It is owned by the City or Municipal Highway Agency.