US Bridges

Arsenal ST E over Is 55

FairPosted for load

St. Louis city, Missouri · S 34 T 45 N R 7 E · Structure no. 887

Built
1964
61 years old, rebuilt 1985
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
240 ft
4 main spans
Daily traffic
6,498
2024 count
Owner
State
State Highway Agency

About this bridge

Arsenal ST E over Is 55 is a concrete continuous box beam or girders - single or spread carrying Arsenal ST E over Is 55 in St. Louis city, Missouri. It was built in 1964 and reconstructed in 1985, so it is 61 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 6 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 6,498 vehicles a day, roughly 5% of them trucks, projected to reach 9,097 by 2044. The structure is 240 ft (73.2 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesArsenal ST E
CrossesIs 55
LocationS 34 T 45 N R 7 E
RouteCity Street 0
CountySt. Louis city
StateMissouri
Coordinates38.59659, -90.21612
Functional classUrban Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.5 US tons
Inventory rating34.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length240 ft (73.2 m)
Longest span73 ft (22.1 m)
Deck width33 ft (10 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,498 (2024)
Projected traffic9,097 by 2044
Trucks5%
Lanes on structure3
Traffic directionOne-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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.1 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Arsenal ST E over Is 55 built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1985.

What condition is Arsenal ST E over 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 August 2023.

How much traffic does Arsenal ST E over Is 55 carry?

About 6,498 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Arsenal ST E over Is 55?

The structure is 240 ft (73.2 m) long with a longest span of 73 ft (22.1 m) and a deck 33 ft wide.

Who owns Arsenal ST E over Is 55?

It is owned by the State Highway Agency.