US Bridges

Rieger RD over Bonhomme CR

FairPosted for load

St. Louis County, Missouri · S 385 T 45 N R 3 E · Structure no. 24162

Built
1940
85 years old
Condition
Fair
inspected January 2024
Type
Tee Beam
Concrete
Length
43 ft
1 main span
Daily traffic
730
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Rieger RD over Bonhomme CR is a concrete tee beam carrying Rieger RD over Bonhomme CR in St. Louis County, Missouri. It was built in 1940, so it is 85 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 730 vehicles a day, roughly 1% of them trucks, projected to reach 986 by 2043. The structure is 43 ft (13.1 m) long and 23 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesRieger RD
CrossesBonhomme CR
LocationS 385 T 45 N R 3 E
RouteCity Street 0
CountySt. Louis County
StateMissouri
Coordinates38.60978, -90.67238
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length43 ft (13.1 m)
Longest span41 ft (12.5 m)
Deck width23 ft (7.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic730 (2023)
Projected traffic986 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$370,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rieger RD over Bonhomme CR built?

It was built in 1940, making it 85 years old in 2025.

What condition is Rieger RD over Bonhomme 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 Rieger RD over Bonhomme CR carry?

About 730 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Rieger RD over Bonhomme CR?

The structure is 43 ft (13.1 m) long with a longest span of 41 ft (12.5 m) and a deck 23 ft wide.

Who owns Rieger RD over Bonhomme CR?

It is owned by the City or Municipal Highway Agency.