US Bridges

Sappington RD S over Is 270

Fair

St. Louis County, Missouri · S 3112 T 55 N R 6 E · Structure no. 4314

Built
1995
30 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
277 ft
2 main spans
Daily traffic
11,726
2024 count
Owner
State
State Highway Agency

About this bridge

Sappington RD S over Is 270 is a steel continuous stringer/multi-beam or girder carrying Sappington RD S over Is 270 in St. Louis County, Missouri. It was built in 1995, so it is 30 years old, younger 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 11,726 vehicles a day, roughly 5% of them trucks, projected to reach 16,416 by 2044. The structure is 277 ft (84.4 m) long and 62 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSappington RD S
CrossesIs 270
LocationS 3112 T 55 N R 6 E
RouteCounty Highway 0
CountySt. Louis County
StateMissouri
Coordinates38.51552, -90.38025
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.4 US tons
Inventory rating47.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length277 ft (84.4 m)
Longest span119 ft (36.3 m)
Deck width62 ft (18.8 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,726 (2024)
Projected traffic16,416 by 2044
Trucks5%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed5 mi (8 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.6 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Sappington RD S over Is 270 built?

It was built in 1995, making it 30 years old in 2025.

What condition is Sappington RD S over Is 270 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 Sappington RD S over Is 270 carry?

About 11,726 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Sappington RD S over Is 270?

The structure is 277 ft (84.4 m) long with a longest span of 119 ft (36.3 m) and a deck 62 ft wide.

Who owns Sappington RD S over Is 270?

It is owned by the State Highway Agency.