US Bridges

Rahning RD over Waterway

Fair

St. Louis County, Missouri · S 3116 T 44 N R 5 E · Structure no. 35680

Built
1990
35 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
600
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Rahning RD over Waterway is a concrete culvert carrying Rahning RD over Waterway 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 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.

It carries about 600 vehicles a day, roughly 2% of them trucks, projected to reach 810 by 2043. The structure is 26 ft (7.8 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesRahning RD
CrossesWaterway
LocationS 3116 T 44 N R 5 E
RouteCity Street 0
CountySt. Louis County
StateMissouri
Coordinates38.5175, -90.41667
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (7.8 m)
Longest span12 ft (3.8 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2023)
Projected traffic810 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Rahning RD over Waterway built?

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

What condition is Rahning RD over Waterway 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 November 2023.

How much traffic does Rahning RD over Waterway carry?

About 600 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Rahning RD over Waterway?

The structure is 26 ft (7.8 m) long with a longest span of 12 ft (3.8 m) and a deck 30 ft wide.

Who owns Rahning RD over Waterway?

It is owned by the City or Municipal Highway Agency.