US Bridges

Mo 47 S over Three Hill CR

Poor

St. Francois County, Missouri · S 7 T 37 N R 4 E · Structure no. 8998

Built
1933
92 years old
Condition
Poor
inspected March 2023
Type
Culvert
Concrete Continuous
Length
34 ft
3 main spans
Daily traffic
3,312
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 47 S over Three Hill CR is a concrete continuous culvert carrying Mo 47 S over Three Hill CR in St. Francois County, Missouri. It was built in 1933, so it is 92 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 3,312 vehicles a day, roughly 6% of them trucks, projected to reach 5,299 by 2044. The structure is 34 ft (10.5 m) long and 29 ft wide. If it were closed, the detour would be 36 mi (58 km).

Location

Open in Google Maps
CarriesMo 47 S
CrossesThree Hill CR
LocationS 7 T 37 N R 4 E
RouteState Highway 47
CountySt. Francois County
StateMissouri
Coordinates37.94667, -90.63584
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47.6 US tons
Inventory rating28.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 10
Structure length34 ft (10.5 m)
Longest span10 ft (3 m)
Deck width29 ft (8.7 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,312 (2024)
Projected traffic5,299 by 2044
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed36 mi (58 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$450,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 47 S over Three Hill CR built?

It was built in 1933, making it 92 years old in 2025.

What condition is Mo 47 S over Three Hill 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 March 2023.

How much traffic does Mo 47 S over Three Hill CR carry?

About 3,312 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Mo 47 S over Three Hill CR?

The structure is 34 ft (10.5 m) long with a longest span of 10 ft (3 m) and a deck 29 ft wide.

Who owns Mo 47 S over Three Hill CR?

It is owned by the State Highway Agency.