US Bridges

Northwest Dr. SB over IH 30

Fair

Dallas County, Texas · 1.1 Mi. NE of IH 635 · Structure no. 180570000911042

Built
1999
26 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
208 ft
2 main spans
Daily traffic
10,706
2019 count
Owner
State
State Highway Agency

About this bridge

Northwest Dr. SB over IH 30 is a steel continuous stringer/multi-beam or girder carrying Northwest Dr. SB over IH 30 in Dallas County, Texas. It was built in 1999, so it is 26 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 10,706 vehicles a day, roughly 3% of them trucks, projected to reach 7,494 by 2042. The structure is 208 ft (63.4 m) long and 69 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNorthwest Dr. SB
CrossesIH 30
Location1.1 Mi. NE of IH 635
RouteCity Street 0
CountyDallas County
StateTexas
Coordinates32.83272, -96.61257
Functional classUrban Minor Arterial

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 inspectionMarch 2024
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 rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length208 ft (63.4 m)
Longest span118 ft (36 m)
Deck width69 ft (21 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,706 (2019)
Projected traffic7,494 by 2042
Trucks3%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$20,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Northwest Dr. SB over IH 30 built?

It was built in 1999, making it 26 years old in 2025.

What condition is Northwest Dr. SB over IH 30 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 March 2024.

How much traffic does Northwest Dr. SB over IH 30 carry?

About 10,706 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is Northwest Dr. SB over IH 30?

The structure is 208 ft (63.4 m) long with a longest span of 118 ft (36 m) and a deck 69 ft wide.

Who owns Northwest Dr. SB over IH 30?

It is owned by the State Highway Agency.