US Bridges

Meramec Bottom RD over Lemay CR

FairPosted for load

St. Louis County, Missouri · S 17 T 43 N R 6 E · Structure no. 15647

Built
1940
85 years old
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
28 ft
1 main span
Daily traffic
4,960
2024 count
Owner
County
County Highway Agency

About this bridge

Meramec Bottom RD over Lemay CR is a prestressed concrete box beam or girders - multiple carrying Meramec Bottom RD over Lemay CR in St. Louis 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 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 4,960 vehicles a day, roughly 3% of them trucks, projected to reach 6,696 by 2044. The structure is 28 ft (8.5 m) long and 24 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesMeramec Bottom RD
CrossesLemay CR
LocationS 17 T 43 N R 6 E
RouteCounty Highway 0
CountySt. Louis County
StateMissouri
Coordinates38.46302, -90.37844
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating37.7 US tons
Inventory rating19.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadOther
Structure length28 ft (8.5 m)
Longest span23 ft (7 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,960 (2024)
Projected traffic6,696 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$470,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Meramec Bottom RD over Lemay CR built?

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

What condition is Meramec Bottom RD over Lemay 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 May 2024.

How much traffic does Meramec Bottom RD over Lemay CR carry?

About 4,960 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Meramec Bottom RD over Lemay CR?

The structure is 28 ft (8.5 m) long with a longest span of 23 ft (7 m) and a deck 24 ft wide.

Who owns Meramec Bottom RD over Lemay CR?

It is owned by the County Highway Agency.