US Bridges

IH 635 NB over IH 20 & IH 635 Conn

Fair

Dallas County, Texas · 0.75 MI N of US 175 · Structure no. 180570009513394

Built
1987
38 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
861 ft
10 main spans
Daily traffic
13,874
2018 count
Owner
State
State Highway Agency

About this bridge

IH 635 NB over IH 20 & IH 635 Conn is a prestressed concrete stringer/multi-beam or girder carrying IH 635 NB over IH 20 & IH 635 Conn in Dallas County, Texas. It was built in 1987, so it is 38 years old, younger 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 13,874 vehicles a day, roughly 14% of them trucks, projected to reach 19,424 by 2024. The structure is 861 ft (262.4 m) long and 70 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesIH 635 NB
CrossesIH 20 & IH 635 Conn
Location0.75 MI N of US 175
RouteInterstate 635
CountyDallas County
StateTexas
Coordinates32.69923, -96.62629
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length861 ft (262.4 m)
Longest span132 ft (40.2 m)
Deck width70 ft (21.3 m)
Roadway width69 ft (20.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,874 (2018)
Projected traffic19,424 by 2024
Trucks14%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 635 NB over IH 20 & IH 635 Conn built?

It was built in 1987, making it 38 years old in 2025.

What condition is IH 635 NB over IH 20 & IH 635 Conn 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 NB over IH 20 & IH 635 Conn carry?

About 13,874 vehicles per day (2018 count), of which roughly 14% are trucks.

How long is IH 635 NB over IH 20 & IH 635 Conn?

The structure is 861 ft (262.4 m) long with a longest span of 132 ft (40.2 m) and a deck 70 ft wide.

Who owns IH 635 NB over IH 20 & IH 635 Conn?

It is owned by the State Highway Agency.