US Bridges

Rt Dd S over Schierbaum CR

Fair

St. Charles County, Missouri · S 15 T 46 N R 2 E · Structure no. 6059

Built
1943
82 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
38 ft
3 main spans
Daily traffic
11,054
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Dd S over Schierbaum CR is a concrete continuous culvert carrying Rt Dd S over Schierbaum CR in St. Charles County, Missouri. It was built in 1943, so it is 82 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 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 11,054 vehicles a day, roughly 6% of them trucks, projected to reach 21,555 by 2044. The structure is 38 ft (11.6 m) long and 33 ft wide. If it were closed, the detour would be 12.4 mi (20 km).

Location

Open in Google Maps
CarriesRt Dd S
CrossesSchierbaum CR
LocationS 15 T 46 N R 2 E
RouteState Highway 0DD
CountySt. Charles County
StateMissouri
Coordinates38.74126, -90.79274
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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating93.3 US tons
Inventory rating56.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 15
Structure length38 ft (11.6 m)
Longest span12 ft (3.7 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,054 (2024)
Projected traffic21,555 by 2044
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed12.4 mi (20 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$306,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rt Dd S over Schierbaum CR built?

It was built in 1943, making it 82 years old in 2025.

What condition is Rt Dd S over Schierbaum 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 November 2023.

How much traffic does Rt Dd S over Schierbaum CR carry?

About 11,054 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Rt Dd S over Schierbaum CR?

The structure is 38 ft (11.6 m) long with a longest span of 12 ft (3.7 m) and a deck 33 ft wide.

Who owns Rt Dd S over Schierbaum CR?

It is owned by the State Highway Agency.