US Bridges

Schaper Ad over Perque CR

Good

St. Charles County, Missouri · S 29 T 47 N R 1 E · Structure no. 22072

Built
1993
32 years old
Condition
Good
inspected February 2024
Type
Tee Beam
Prestressed Concrete
Length
113 ft
3 main spans
Daily traffic
455
2024 count
Owner
County
County Highway Agency

About this bridge

Schaper Ad over Perque CR is a prestressed concrete tee beam carrying Schaper Ad over Perque CR in St. Charles County, Missouri. It was built in 1993, so it is 32 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 455 vehicles a day, roughly 5% of them trucks, projected to reach 705 by 2044. The structure is 113 ft (34.4 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSchaper Ad
CrossesPerque CR
LocationS 29 T 47 N R 1 E
RouteCounty Highway 339
CountySt. Charles County
StateMissouri
Coordinates38.79831, -90.925
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length113 ft (34.4 m)
Longest span43 ft (13 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck12 ft (3.8 m)

Traffic and service

Average daily traffic455 (2024)
Projected traffic705 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Schaper Ad over Perque CR built?

It was built in 1993, making it 32 years old in 2025.

What condition is Schaper Ad over Perque 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 February 2024.

How much traffic does Schaper Ad over Perque CR carry?

About 455 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Schaper Ad over Perque CR?

The structure is 113 ft (34.4 m) long with a longest span of 43 ft (13 m) and a deck 26 ft wide.

Who owns Schaper Ad over Perque CR?

It is owned by the County Highway Agency.