US Bridges

Salt River RD over Outlet Ditch

Fair

St. Charles County, Missouri · S 290 T 47 N R 4 E · Structure no. 35242

Built
2009
16 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
31 ft
3 main spans
Daily traffic
5,000
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Salt River RD over Outlet Ditch is a concrete culvert carrying Salt River RD over Outlet Ditch in St. Charles County, Missouri. It was built in 2009, so it is 16 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 5,000 vehicles a day, roughly 5% of them trucks, projected to reach 7,750 by 2044. The structure is 31 ft (9.6 m) long. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSalt River RD
CrossesOutlet Ditch
LocationS 290 T 47 N R 4 E
RouteCity Street 388
Coordinates38.81083, -90.61056
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal 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 spans3
Design loadHS 20
Structure length31 ft (9.6 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2024)
Projected traffic7,750 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Salt River RD over Outlet Ditch built?

It was built in 2009, making it 16 years old in 2025.

What condition is Salt River RD over Outlet Ditch 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 January 2024.

How much traffic does Salt River RD over Outlet Ditch carry?

About 5,000 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Salt River RD over Outlet Ditch?

The structure is 31 ft (9.6 m) long with a longest span of 10 ft (3 m).

Who owns Salt River RD over Outlet Ditch?

It is owned by the City or Municipal Highway Agency.