US Bridges

N Elm Ave over Shady Grove CR

PoorPosted for load

St. Louis County, Missouri · S 1953 T 45 N R 6 E · Structure no. 24022

Built
1989
36 years old
Condition
Poor
inspected January 2024
Type
Culvert
Steel
Length
21 ft
1 main span
Daily traffic
13,730
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

N Elm Ave over Shady Grove CR is a steel culvert carrying N Elm Ave over Shady Grove CR in St. Louis County, Missouri. It was built in 1989, so it is 36 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. Its operating status is: posted for load restriction.

It carries about 13,730 vehicles a day, roughly 1% of them trucks, projected to reach 18,536 by 2043. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesN Elm Ave
CrossesShady Grove CR
LocationS 1953 T 45 N R 6 E
RouteCity Street 0
CountySt. Louis County
StateMissouri
Coordinates38.59809, -90.35682
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.8 US tons
Inventory rating19.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadOther
Structure length21 ft (6.4 m)
Longest span17 ft (5.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,730 (2023)
Projected traffic18,536 by 2043
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$225,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was N Elm Ave over Shady Grove CR built?

It was built in 1989, making it 36 years old in 2025.

What condition is N Elm Ave over Shady Grove CR 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 January 2024.

How much traffic does N Elm Ave over Shady Grove CR carry?

About 13,730 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is N Elm Ave over Shady Grove CR?

The structure is 21 ft (6.4 m) long with a longest span of 17 ft (5.2 m).

Who owns N Elm Ave over Shady Grove CR?

It is owned by the City or Municipal Highway Agency.