US Bridges

Pitman Hill RD over Trib of Dardenne C

Fair

St. Charles County, Missouri · S 292 T 46 N R 3 E · Structure no. 20059

Built
1974
51 years old, rebuilt 2006
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
26 ft
2 main spans
Daily traffic
8,509
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Pitman Hill RD over Trib of Dardenne C is a steel continuous stringer/multi-beam or girder carrying Pitman Hill RD over Trib of Dardenne C in St. Charles County, Missouri. It was built in 1974 and reconstructed in 2006, so it is 51 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 8,509 vehicles a day, roughly 5% of them trucks, projected to reach 13,189 by 2044. The structure is 26 ft (7.9 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesPitman Hill RD
CrossesTrib of Dardenne C
LocationS 292 T 46 N R 3 E
RouteCounty Highway 245
Coordinates38.73454, -90.63176
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width29 ft (8.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,509 (2024)
Projected traffic13,189 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 byCounty 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$300,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Pitman Hill RD over Trib of Dardenne C built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2006.

What condition is Pitman Hill RD over Trib of Dardenne C 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 February 2024.

How much traffic does Pitman Hill RD over Trib of Dardenne C carry?

About 8,509 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Pitman Hill RD over Trib of Dardenne C?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m) and a deck 29 ft wide.

Who owns Pitman Hill RD over Trib of Dardenne C?

It is owned by the City or Municipal Highway Agency and maintained by the County Highway Agency.