US Bridges

IH 45 NB Conn a over IH20/IH45 Interchange

Fair

Dallas County, Texas · At Int IH 20 & IH 45 · Structure no. 180570237403309

Built
1973
52 years old, rebuilt 2019
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,822 ft
2 main spans
Daily traffic
11,235
2019 count
Owner
State
State Highway Agency

About this bridge

IH 45 NB Conn a over IH20/IH45 Interchange is a steel continuous stringer/multi-beam or girder carrying IH 45 NB Conn a over IH20/IH45 Interchange in Dallas County, Texas. It was built in 1973 and reconstructed in 2019, 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 11,235 vehicles a day, projected to reach 15,729 by 2040. The structure is 1,822 ft (555.3 m) long and 26 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesIH 45 NB Conn a
CrossesIH20/IH45 Interchange
LocationAt Int IH 20 & IH 45
RouteInterstate 45
CountyDallas County
StateTexas
Coordinates32.65988, -96.72336
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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+21 approach)
Design loadHS 20
Structure length1,822 ft (555.3 m)
Longest span182 ft (55.6 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck16 ft (5 m)

Traffic and service

Average daily traffic11,235 (2019)
Projected traffic15,729 by 2040
Trucks0%
Lanes on structure1
Traffic directionOne-way traffic
CarriesThird level (interchange)
CrossesHighway and waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkSTRAHNET connector

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 45 NB Conn a over IH20/IH45 Interchange built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2019.

What condition is IH 45 NB Conn a over IH20/IH45 Interchange 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 45 NB Conn a over IH20/IH45 Interchange carry?

About 11,235 vehicles per day (2019 count).

How long is IH 45 NB Conn a over IH20/IH45 Interchange?

The structure is 1,822 ft (555.3 m) long with a longest span of 182 ft (55.6 m) and a deck 26 ft wide.

Who owns IH 45 NB Conn a over IH20/IH45 Interchange?

It is owned by the State Highway Agency.