US Bridges

US 67 N over Is 70 Rp Natural Brid

Fair

St. Louis County, Missouri · S 12 T 46 N R 5 E · Structure no. 6575

Built
1957
68 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
248 ft
4 main spans
Daily traffic
17,465
2024 count
Owner
State
State Highway Agency

About this bridge

US 67 N over Is 70 Rp Natural Brid is a concrete continuous box beam or girders - single or spread carrying US 67 N over Is 70 Rp Natural Brid in St. Louis County, Missouri. It was built in 1957, so it is 68 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 17,465 vehicles a day, roughly 9% of them trucks, projected to reach 24,451 by 2044. The structure is 248 ft (75.6 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesUS 67 N
CrossesIs 70 Rp Natural Brid
LocationS 12 T 46 N R 5 E
RouteU.S. Route 67
CountySt. Louis County
StateMissouri
Coordinates38.74359, -90.39542
Functional classUrban Other Principal 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating107.1 US tons
Inventory rating63.5 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length248 ft (75.6 m)
Longest span74 ft (22.6 m)
Deck width41 ft (12.6 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,465 (2024)
Projected traffic24,451 by 2044
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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$2.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 67 N over Is 70 Rp Natural Brid built?

It was built in 1957, making it 68 years old in 2025.

What condition is US 67 N over Is 70 Rp Natural Brid 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 September 2024.

How much traffic does US 67 N over Is 70 Rp Natural Brid carry?

About 17,465 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is US 67 N over Is 70 Rp Natural Brid?

The structure is 248 ft (75.6 m) long with a longest span of 74 ft (22.6 m) and a deck 41 ft wide.

Who owns US 67 N over Is 70 Rp Natural Brid?

It is owned by the State Highway Agency.