US Bridges

IH 20 Wbml over SH 310

Fair

Dallas County, Texas · 0.3 MI E of IH 45 · Structure no. 180570237403304

Built
1973
52 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
203 ft
3 main spans
Daily traffic
69,471
2023 count
Owner
State
State Highway Agency

About this bridge

IH 20 Wbml over SH 310 is a steel continuous stringer/multi-beam or girder carrying IH 20 Wbml over SH 310 in Dallas County, Texas. It was built in 1973, so it is 52 years old, older than the Texas average of 44.4 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 69,471 vehicles a day, roughly 19% of them trucks, projected to reach 85,503 by 2040. The structure is 203 ft (61.9 m) long and 70 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIH 20 Wbml
CrossesSH 310
Location0.3 MI E of IH 45
RouteInterstate 20
CountyDallas County
StateTexas
Coordinates32.66394, -96.72266
Functional classUrban Principal Arterial - Interstate

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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length203 ft (61.9 m)
Longest span101 ft (30.8 m)
Deck width70 ft (21.3 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic69,471 (2023)
Projected traffic85,503 by 2040
Trucks19%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 20 Wbml over SH 310 built?

It was built in 1973, making it 52 years old in 2025.

What condition is IH 20 Wbml over SH 310 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 October 2023.

How much traffic does IH 20 Wbml over SH 310 carry?

About 69,471 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is IH 20 Wbml over SH 310?

The structure is 203 ft (61.9 m) long with a longest span of 101 ft (30.8 m) and a deck 70 ft wide.

Who owns IH 20 Wbml over SH 310?

It is owned by the State Highway Agency.