US Bridges

Park RD B over Br of Dardenne CR

Poor

St. Charles County, Missouri · S 887 T 46 N R 2 E · Structure no. 25541

Built
1942
83 years old
Condition
Poor
inspected January 2024
Type
Culvert
Steel
Length
25 ft
2 main spans
Daily traffic
1,000
2024 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Park RD B over Br of Dardenne CR is a steel culvert carrying Park RD B over Br of Dardenne CR in St. Charles County, Missouri. It was built in 1942, so it is 83 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,000 vehicles a day, roughly 1% of them trucks, projected to reach 2,200 by 2044. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesPark RD B
CrossesBr of Dardenne CR
LocationS 887 T 46 N R 2 E
RouteCounty Highway 170
CountySt. Charles County
StateMissouri
Coordinates38.71992, -90.76374
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadOther
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2024)
Projected traffic2,200 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

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$153,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Park RD B over Br of Dardenne CR built?

It was built in 1942, making it 83 years old in 2025.

What condition is Park RD B over Br of Dardenne CR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2024.

How much traffic does Park RD B over Br of Dardenne CR carry?

About 1,000 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Park RD B over Br of Dardenne CR?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m).

Who owns Park RD B over Br of Dardenne CR?

It is owned by the State Park, Forest, or Reservation Agency.