US Bridges

Boone Hills DR over Spencer CR

Fair

St. Charles County, Missouri · S 1779 T 47 N R 4 E · Structure no. 33918

Built
1990
35 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
53 ft
4 main spans
Daily traffic
200
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Boone Hills DR over Spencer CR is a concrete culvert carrying Boone Hills DR over Spencer CR in St. Charles County, Missouri. It was built in 1990, so it is 35 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 200 vehicles a day, roughly 1% of them trucks, projected to reach 310 by 2044. The structure is 53 ft (16.2 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesBoone Hills DR
CrossesSpencer CR
LocationS 1779 T 47 N R 4 E
RouteCity Street 0
Coordinates38.78733, -90.58931
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 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 alignment6: Equal to present minimum criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadUnknown
Structure length53 ft (16.2 m)
Longest span13 ft (4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2024)
Projected traffic310 by 2044
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Boone Hills DR over Spencer CR built?

It was built in 1990, making it 35 years old in 2025.

What condition is Boone Hills DR over Spencer 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 Boone Hills DR over Spencer CR carry?

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

How long is Boone Hills DR over Spencer CR?

The structure is 53 ft (16.2 m) long with a longest span of 13 ft (4 m).

Who owns Boone Hills DR over Spencer CR?

It is owned by the City or Municipal Highway Agency.