US Bridges

Missouri Bottom RD over Is 270

Poor

St. Louis County, Missouri · S 2093 T 47 N R 5 E · Structure no. 3496

Built
1990
35 years old
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
301 ft
4 main spans
Daily traffic
11,356
2024 count
Owner
State
State Highway Agency

About this bridge

Missouri Bottom RD over Is 270 is a steel continuous stringer/multi-beam or girder carrying Missouri Bottom RD over Is 270 in St. Louis County, Missouri. It was built in 1990, so it is 35 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 11,356 vehicles a day, roughly 5% of them trucks, projected to reach 17,034 by 2044. The structure is 301 ft (91.7 m) long and 95 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMissouri Bottom RD
CrossesIs 270
LocationS 2093 T 47 N R 5 E
RouteCity Street 0
CountySt. Louis County
StateMissouri
Coordinates38.77277, -90.40043
Functional classUrban Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 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 rating78.4 US tons
Inventory rating46.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length301 ft (91.7 m)
Longest span108 ft (32.9 m)
Deck width95 ft (28.9 m)
Roadway width92 ft (28 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,356 (2024)
Projected traffic17,034 by 2044
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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 Missouri Bottom RD over Is 270 built?

It was built in 1990, making it 35 years old in 2025.

What condition is Missouri Bottom RD over Is 270 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does Missouri Bottom RD over Is 270 carry?

About 11,356 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Missouri Bottom RD over Is 270?

The structure is 301 ft (91.7 m) long with a longest span of 108 ft (32.9 m) and a deck 95 ft wide.

Who owns Missouri Bottom RD over Is 270?

It is owned by the State Highway Agency.