US Bridges

IH 635 EB over Northwest Highway

Fair

Dallas County, Texas · 3.5 MI NW of IH 30 · Structure no. 180570237402433

Built
1967
58 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
270 ft
4 main spans
Daily traffic
76,110
2013 count
Owner
State
State Highway Agency

About this bridge

IH 635 EB over Northwest Highway is a steel continuous stringer/multi-beam or girder carrying IH 635 EB over Northwest Highway in Dallas County, Texas. It was built in 1967, so it is 58 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 76,110 vehicles a day, roughly 13% of them trucks, projected to reach 106,550 by 2033. The structure is 270 ft (82.3 m) long and 71 ft wide.

Location

Open in Google Maps
CarriesIH 635 EB
CrossesNorthwest Highway
Location3.5 MI NW of IH 30
RouteInterstate 635
CountyDallas County
StateTexas
Coordinates32.86405, -96.66162
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
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 rating72 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length270 ft (82.3 m)
Longest span80 ft (24.4 m)
Deck width71 ft (21.6 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic76,110 (2013)
Projected traffic106,550 by 2033
Trucks13%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 635 EB over Northwest Highway built?

It was built in 1967, making it 58 years old in 2025.

What condition is IH 635 EB over Northwest Highway 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 August 2023.

How much traffic does IH 635 EB over Northwest Highway carry?

About 76,110 vehicles per day (2013 count), of which roughly 13% are trucks.

How long is IH 635 EB over Northwest Highway?

The structure is 270 ft (82.3 m) long with a longest span of 80 ft (24.4 m) and a deck 71 ft wide.

Who owns IH 635 EB over Northwest Highway?

It is owned by the State Highway Agency.