US Bridges

ST Cyr RD over Calumet CR

Good

St. Louis County, Missouri · S 9 T 46 N R 7 E · Structure no. 35029

Built
2015
10 years old
Condition
Good
inspected November 2023
Type
Culvert
Concrete
Length
20 ft
1 main span
Daily traffic
1,000
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

ST Cyr RD over Calumet CR is a concrete culvert carrying ST Cyr RD over Calumet CR in St. Louis County, Missouri. It was built in 2015, so it is 10 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 1,000 vehicles a day, roughly 10% of them trucks, projected to reach 1,350 by 2043. The structure is 20 ft (6.1 m) long and 52 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesST Cyr RD
CrossesCalumet CR
LocationS 9 T 46 N R 7 E
RouteCity Street 0
CountySt. Louis County
StateMissouri
Coordinates38.73636, -90.22406
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.5 US tons
Inventory rating46.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width52 ft (15.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2023)
Projected traffic1,350 by 2043
Trucks10%
Lanes on structure2
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

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 ST Cyr RD over Calumet CR built?

It was built in 2015, making it 10 years old in 2025.

What condition is ST Cyr RD over Calumet 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 November 2023.

How much traffic does ST Cyr RD over Calumet CR carry?

About 1,000 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is ST Cyr RD over Calumet CR?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 52 ft wide.

Who owns ST Cyr RD over Calumet CR?

It is owned by the City or Municipal Highway Agency.