US Bridges

Rt H S over Monegaw CR

PoorPosted for load

St. Clair County, Missouri · S 27 T 39 N R 28 W · Structure no. 9157

Built
1934
91 years old
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
103 ft
3 main spans
Daily traffic
317
2024 count
Owner
State
State Highway Agency

About this bridge

Rt H S over Monegaw CR is a steel stringer/multi-beam or girder carrying Rt H S over Monegaw CR in St. Clair County, Missouri. It was built in 1934, so it is 91 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 3 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. Its operating status is: posted for load restriction.

It carries about 317 vehicles a day, roughly 11% of them trucks, projected to reach 412 by 2044. The structure is 103 ft (31.4 m) long and 21 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

CarriesRt H S
CrossesMonegaw CR
LocationS 27 T 39 N R 28 W
RouteState Highway 0H
Coordinates38.11964, -93.99896
Functional classRural Major Collector

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
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
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 inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating20.8 US tons
Inventory rating9.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 10
Structure length103 ft (31.4 m)
Longest span35 ft (10.7 m)
Deck width21 ft (6.5 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic317 (2024)
Projected traffic412 by 2044
Trucks11%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rt H S over Monegaw CR built?

It was built in 1934, making it 91 years old in 2025.

What condition is Rt H S over Monegaw 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 September 2024.

How much traffic does Rt H S over Monegaw CR carry?

About 317 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Rt H S over Monegaw CR?

The structure is 103 ft (31.4 m) long with a longest span of 35 ft (10.7 m) and a deck 21 ft wide.

Who owns Rt H S over Monegaw CR?

It is owned by the State Highway Agency.