US Bridges

Dougherty Ferry RD over Is 270

Good

St. Louis County, Missouri · S 3 T 44 N R 5 E · Structure no. 31842

Built
2007
18 years old
Condition
Good
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
272 ft
4 main spans
Daily traffic
32,341
2024 count
Owner
State
State Highway Agency

About this bridge

Dougherty Ferry RD over Is 270 is a prestressed concrete continuous box beam or girders - multiple carrying Dougherty Ferry RD over Is 270 in St. Louis County, Missouri. It was built in 2007, so it is 18 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 32,341 vehicles a day, roughly 5% of them trucks, projected to reach 45,277 by 2044. The structure is 272 ft (83 m) long and 98 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesDougherty Ferry RD
CrossesIs 270
LocationS 3 T 44 N R 5 E
RouteCity Street 0
Coordinates38.58163, -90.44794
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.4 US tons
Inventory rating41.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length272 ft (83 m)
Longest span75 ft (22.9 m)
Deck width98 ft (29.9 m)
Roadway width88 ft (26.9 m)
Vertical clearance over deck17 ft (5.2 m)

Traffic and service

Average daily traffic32,341 (2024)
Projected traffic45,277 by 2044
Trucks5%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Dougherty Ferry RD over Is 270 built?

It was built in 2007, making it 18 years old in 2025.

What condition is Dougherty Ferry RD over Is 270 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does Dougherty Ferry RD over Is 270 carry?

About 32,341 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Dougherty Ferry RD over Is 270?

The structure is 272 ft (83 m) long with a longest span of 75 ft (22.9 m) and a deck 98 ft wide.

Who owns Dougherty Ferry RD over Is 270?

It is owned by the State Highway Agency.