US Bridges

Graystone DR over Cole CR

Fair

St. Charles County, Missouri · S 3280 T 46 N R 4 E · Structure no. 22957

Built
1988
37 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
29 ft
3 main spans
Daily traffic
12,200
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Graystone DR over Cole CR is a concrete culvert carrying Graystone DR over Cole CR in St. Charles County, Missouri. It was built in 1988, so it is 37 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 5 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 12,200 vehicles a day, roughly 1% of them trucks, projected to reach 18,910 by 2044. The structure is 29 ft (8.8 m) long and 36 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesGraystone DR
CrossesCole CR
LocationS 3280 T 46 N R 4 E
RouteCity Street 383
CountySt. Charles County
StateMissouri
Coordinates38.77067, -90.53567
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.6 US tons
Inventory rating32.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 15
Structure length29 ft (8.8 m)
Longest span9 ft (2.7 m)
Deck width36 ft (11 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,200 (2024)
Projected traffic18,910 by 2044
Trucks1%
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 Graystone DR over Cole CR built?

It was built in 1988, making it 37 years old in 2025.

What condition is Graystone DR over Cole 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 Graystone DR over Cole CR carry?

About 12,200 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Graystone DR over Cole CR?

The structure is 29 ft (8.8 m) long with a longest span of 9 ft (2.7 m) and a deck 36 ft wide.

Who owns Graystone DR over Cole CR?

It is owned by the City or Municipal Highway Agency.