US Bridges

Riverside RD over Blanchette CR

FairPosted for load

St. Charles County, Missouri · S 3280 T 47 N R 5 E · Structure no. 22953

Built
1977
48 years old, rebuilt 1996
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
75 ft
1 main span
Daily traffic
3,000
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Riverside RD over Blanchette CR is a steel stringer/multi-beam or girder carrying Riverside RD over Blanchette CR in St. Charles County, Missouri. It was built in 1977 and reconstructed in 1996, so it is 48 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 5 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 3,000 vehicles a day, roughly 2% of them trucks, projected to reach 4,650 by 2044. The structure is 75 ft (22.9 m) long and 44 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesRiverside RD
CrossesBlanchette CR
LocationS 3280 T 47 N R 5 E
RouteCity Street 383
Coordinates38.77432, -90.48405
Functional classUrban Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating32.7 US tons
Inventory rating19.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length75 ft (22.9 m)
Longest span72 ft (21.9 m)
Deck width44 ft (13.5 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2024)
Projected traffic4,650 by 2044
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 Riverside RD over Blanchette CR built?

It was built in 1977, making it 48 years old in 2025. It was reconstructed in 1996.

What condition is Riverside RD over Blanchette CR 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 Riverside RD over Blanchette CR carry?

About 3,000 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Riverside RD over Blanchette CR?

The structure is 75 ft (22.9 m) long with a longest span of 72 ft (21.9 m) and a deck 44 ft wide.

Who owns Riverside RD over Blanchette CR?

It is owned by the City or Municipal Highway Agency.