US Bridges

IH 45 NB Conn C over IH 30

Poor

Dallas County, Texas · 0.3 MI E of Preston ST · Structure no. 180570000911347

Built
1961
64 years old, rebuilt 1971
Condition
Poor
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
315 ft
4 main spans
Daily traffic
194,353
2023 count
Owner
State
State Highway Agency

About this bridge

IH 45 NB Conn C over IH 30 is a steel continuous stringer/multi-beam or girder carrying IH 45 NB Conn C over IH 30 in Dallas County, Texas. It was built in 1961 and reconstructed in 1971, so it is 64 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 194,353 vehicles a day, roughly 17% of them trucks, projected to reach 130,550 by 2036. The structure is 315 ft (96 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIH 45 NB Conn C
CrossesIH 30
Location0.3 MI E of Preston ST
RouteInterstate 345
CountyDallas County
StateTexas
Coordinates32.77881, -96.78217
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating37 US tons
Inventory rating22 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length315 ft (96 m)
Longest span112 ft (34.1 m)
Deck width36 ft (10.9 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deck17 ft (5.1 m)

Traffic and service

Average daily traffic194,353 (2023)
Projected traffic130,550 by 2036
Trucks17%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 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 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 C over IH 30 built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1971.

What condition is IH 45 NB Conn C over IH 30 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2024.

How much traffic does IH 45 NB Conn C over IH 30 carry?

About 194,353 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is IH 45 NB Conn C over IH 30?

The structure is 315 ft (96 m) long with a longest span of 112 ft (34.1 m) and a deck 36 ft wide.

Who owns IH 45 NB Conn C over IH 30?

It is owned by the State Highway Agency.