US Bridges

Railroad ST over Big Bend Blvd

PoorPosted for load

St. Louis County, Missouri · S 27 T 45 N R 6 E · Structure no. 15640

Built
1960
65 years old
Condition
Poor
inspected May 2024
Type
Slab
Concrete
Length
58 ft
1 main span
Daily traffic
643
2024 count
Owner
County
County Highway Agency

About this bridge

Railroad ST over Big Bend Blvd is a concrete slab carrying Railroad ST over Big Bend Blvd in St. Louis County, Missouri. It was built in 1960, so it is 65 years old, older 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. Its operating status is: posted for load restriction.

It carries about 643 vehicles a day, roughly 3% of them trucks, projected to reach 868 by 2044. The structure is 58 ft (17.7 m) long and 38 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesRailroad ST
CrossesBig Bend Blvd
LocationS 27 T 45 N R 6 E
RouteCounty Highway 0
CountySt. Louis County
StateMissouri
Coordinates38.60459, -90.32464
Functional classUrban Minor Arterial

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.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating73.4 US tons
Inventory rating36.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length58 ft (17.7 m)
Longest span52 ft (15.8 m)
Deck width38 ft (11.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic643 (2024)
Projected traffic868 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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$485,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Railroad ST over Big Bend Blvd built?

It was built in 1960, making it 65 years old in 2025.

What condition is Railroad ST over Big Bend Blvd 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 May 2024.

How much traffic does Railroad ST over Big Bend Blvd carry?

About 643 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Railroad ST over Big Bend Blvd?

The structure is 58 ft (17.7 m) long with a longest span of 52 ft (15.8 m) and a deck 38 ft wide.

Who owns Railroad ST over Big Bend Blvd?

It is owned by the County Highway Agency.