US Bridges

IH 20 Wbml over Houston School RD

Fair

Dallas County, Texas · 1.0 MI E of IH 35E · Structure no. 180570237403147

Built
1971
54 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
218 ft
1 main span
Daily traffic
76,105
2020 count
Owner
State
State Highway Agency

About this bridge

IH 20 Wbml over Houston School RD is a steel continuous stringer/multi-beam or girder carrying IH 20 Wbml over Houston School RD in Dallas County, Texas. It was built in 1971, so it is 54 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 6 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 76,105 vehicles a day, roughly 20% of them trucks, projected to reach 152,210 by 2040. The structure is 218 ft (66.4 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
CrossesHouston School RD
Location1.0 MI E of IH 35E
RouteInterstate 20
CountyDallas County
StateTexas
Coordinates32.64236, -96.80575
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
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 rating48.9 US tons
Inventory rating29.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length218 ft (66.4 m)
Longest span96 ft (29.3 m)
Deck width70 ft (21.2 m)
Roadway width68 ft (20.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic76,105 (2020)
Projected traffic152,210 by 2040
Trucks20%
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 Houston School RD built?

It was built in 1971, making it 54 years old in 2025.

What condition is IH 20 Wbml over Houston School RD 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 Houston School RD carry?

About 76,105 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is IH 20 Wbml over Houston School RD?

The structure is 218 ft (66.4 m) long with a longest span of 96 ft (29.3 m) and a deck 70 ft wide.

Who owns IH 20 Wbml over Houston School RD?

It is owned by the State Highway Agency.