US Bridges

Meramec Bottom RD over Is 55 Is 55

Fair

St. Louis County, Missouri · S 17 T 43 N R 6 E · Structure no. 4253

Built
1996
29 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
280 ft
2 main spans
Daily traffic
6,611
2024 count
Owner
State
State Highway Agency

About this bridge

Meramec Bottom RD over Is 55 Is 55 is a steel continuous stringer/multi-beam or girder carrying Meramec Bottom RD over Is 55 Is 55 in St. Louis County, Missouri. It was built in 1996, so it is 29 years old, younger 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 6,611 vehicles a day, roughly 6% of them trucks, projected to reach 9,917 by 2044. The structure is 280 ft (85.3 m) long and 87 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMeramec Bottom RD
CrossesIs 55 Is 55
LocationS 17 T 43 N R 6 E
RouteCounty Highway 0
CountySt. Louis County
StateMissouri
Coordinates38.46171, -90.37387
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.4 US tons
Inventory rating45.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length280 ft (85.3 m)
Longest span140 ft (42.7 m)
Deck width87 ft (26.4 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,611 (2024)
Projected traffic9,917 by 2044
Trucks6%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Meramec Bottom RD over Is 55 Is 55 built?

It was built in 1996, making it 29 years old in 2025.

What condition is Meramec Bottom RD over Is 55 Is 55 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 July 2024.

How much traffic does Meramec Bottom RD over Is 55 Is 55 carry?

About 6,611 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Meramec Bottom RD over Is 55 Is 55?

The structure is 280 ft (85.3 m) long with a longest span of 140 ft (42.7 m) and a deck 87 ft wide.

Who owns Meramec Bottom RD over Is 55 Is 55?

It is owned by the State Highway Agency.