US Bridges

Delmar Blvd E over Is 170

Good

St. Louis County, Missouri · S 4 T 45 N R 6 E · Structure no. 33477

Built
2011
14 years old
Condition
Good
inspected October 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
149 ft
2 main spans
Daily traffic
10,766
2024 count
Owner
State
State Highway Agency

About this bridge

Delmar Blvd E over Is 170 is a prestressed concrete box beam or girders - single or spread carrying Delmar Blvd E over Is 170 in St. Louis County, Missouri. It was built in 2011, so it is 14 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 10,766 vehicles a day, roughly 5% of them trucks, projected to reach 16,149 by 2044. The structure is 149 ft (45.3 m) long and 84 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesDelmar Blvd E
CrossesIs 170
LocationS 4 T 45 N R 6 E
RouteCity Street 0
Coordinates38.66083, -90.35749
Functional classUrban Collector

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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.4 US tons
Inventory rating37.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length149 ft (45.3 m)
Longest span73 ft (22.3 m)
Deck width84 ft (25.6 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deck16 ft (5 m)

Traffic and service

Average daily traffic10,766 (2024)
Projected traffic16,149 by 2044
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.5 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Delmar Blvd E over Is 170 built?

It was built in 2011, making it 14 years old in 2025.

What condition is Delmar Blvd E over Is 170 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 October 2024.

How much traffic does Delmar Blvd E over Is 170 carry?

About 10,766 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Delmar Blvd E over Is 170?

The structure is 149 ft (45.3 m) long with a longest span of 73 ft (22.3 m) and a deck 84 ft wide.

Who owns Delmar Blvd E over Is 170?

It is owned by the State Highway Agency.