US Bridges

Allenton RD over UP RR

Good

St. Louis County, Missouri · S 34 T 44 N R 3 E · Structure no. 37151

Built
2024
1 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
149 ft
2 main spans
Daily traffic
1,000
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Allenton RD over UP RR is a steel continuous stringer/multi-beam or girder carrying Allenton RD over UP RR in St. Louis County, Missouri. It was built in 2024, so it is 1 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: new structure not yet open to traffic.

It carries about 1,000 vehicles a day, roughly 10% of them trucks, projected to reach 1,350 by 2044. The structure is 149 ft (45.3 m) long and 63 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesAllenton RD
CrossesUP RR
LocationS 34 T 44 N R 3 E
RouteCity Street 0
CountySt. Louis County
StateMissouri
Coordinates38.50406, -90.67636
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusNew structure not yet open to traffic
ScourBridge not over waterway
Structural evaluation9: Superior to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating72.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length149 ft (45.3 m)
Longest span98 ft (30 m)
Deck width63 ft (19.1 m)
Roadway width52 ft (15.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2024)
Projected traffic1,350 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Allenton RD over UP RR built?

It was built in 2024, making it 1 years old in 2025.

What condition is Allenton RD over UP RR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.

How much traffic does Allenton RD over UP RR carry?

About 1,000 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Allenton RD over UP RR?

The structure is 149 ft (45.3 m) long with a longest span of 98 ft (30 m) and a deck 63 ft wide.

Who owns Allenton RD over UP RR?

It is owned by the City or Municipal Highway Agency.