US Bridges

River City Blvd over Gravois CR

Good

St. Louis County, Missouri · S 12 T 44 N R 6 E · Structure no. 32969

Built
2009
16 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
100 ft
1 main span
Daily traffic
10,746
2024 count
Owner
County
County Highway Agency

About this bridge

River City Blvd over Gravois CR is a prestressed concrete stringer/multi-beam or girder carrying River City Blvd over Gravois CR in St. Louis 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 10,746 vehicles a day, roughly 2% of them trucks, projected to reach 14,507 by 2044. The structure is 100 ft (30.5 m) long and 51 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesRiver City Blvd
CrossesGravois CR
LocationS 12 T 44 N R 6 E
RouteCounty Highway 0
CountySt. Louis County
StateMissouri
Coordinates38.54806, -90.27222
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating69.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span94 ft (28.7 m)
Deck width51 ft (15.5 m)
Roadway width42 ft (12.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,746 (2024)
Projected traffic14,507 by 2044
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.3 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was River City Blvd over Gravois CR built?

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

What condition is River City Blvd over Gravois CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does River City Blvd over Gravois CR carry?

About 10,746 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is River City Blvd over Gravois CR?

The structure is 100 ft (30.5 m) long with a longest span of 94 ft (28.7 m) and a deck 51 ft wide.

Who owns River City Blvd over Gravois CR?

It is owned by the County Highway Agency.