US Bridges

So Rock Hill RD S over Is 44

Fair

St. Louis County, Missouri · S 5 T 44 N R 6 E · Structure no. 1422

Built
1969
56 years old, rebuilt 1984
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
251 ft
4 main spans
Daily traffic
4,302
2024 count
Owner
State
State Highway Agency

About this bridge

So Rock Hill RD S over Is 44 is a concrete continuous box beam or girders - single or spread carrying So Rock Hill RD S over Is 44 in St. Louis County, Missouri. It was built in 1969 and reconstructed in 1984, so it is 56 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.

It carries about 4,302 vehicles a day, roughly 5% of them trucks, projected to reach 6,453 by 2044. The structure is 251 ft (76.5 m) long and 40 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSo Rock Hill RD S
CrossesIs 44
LocationS 5 T 44 N R 6 E
RouteCity Street 0
CountySt. Louis County
StateMissouri
Coordinates38.57843, -90.36767
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating77.4 US tons
Inventory rating46.6 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length251 ft (76.5 m)
Longest span81 ft (24.8 m)
Deck width40 ft (12.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,302 (2024)
Projected traffic6,453 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was So Rock Hill RD S over Is 44 built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 1984.

What condition is So Rock Hill RD S over Is 44 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 June 2024.

How much traffic does So Rock Hill RD S over Is 44 carry?

About 4,302 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is So Rock Hill RD S over Is 44?

The structure is 251 ft (76.5 m) long with a longest span of 81 ft (24.8 m) and a deck 40 ft wide.

Who owns So Rock Hill RD S over Is 44?

It is owned by the State Highway Agency.