US Bridges

IH 45 NB Onramp over West Dallas Street

Fair

Harris County, Texas · 0.10 MI S of Allen Pkwy · Structure no. 121020050003109

Built
1963
62 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
568 ft
10 main spans
Daily traffic
21,580
2013 count
Owner
State
State Highway Agency

About this bridge

IH 45 NB Onramp over West Dallas Street is a steel stringer/multi-beam or girder carrying IH 45 NB Onramp over West Dallas Street in Harris County, Texas. It was built in 1963, so it is 62 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 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 21,580 vehicles a day, roughly 7% of them trucks, projected to reach 30,220 by 2033. The structure is 568 ft (173.1 m) long and 31 ft wide.

Location

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CarriesIH 45 NB Onramp
CrossesWest Dallas Street
Location0.10 MI S of Allen Pkwy
RouteState Highway 45
CountyHarris County
StateTexas
Coordinates29.75771, -95.37439
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length568 ft (173.1 m)
Longest span73 ft (22.3 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,580 (2013)
Projected traffic30,220 by 2033
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$40,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 45 NB Onramp over West Dallas Street built?

It was built in 1963, making it 62 years old in 2025.

What condition is IH 45 NB Onramp over West Dallas Street 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 2024.

How much traffic does IH 45 NB Onramp over West Dallas Street carry?

About 21,580 vehicles per day (2013 count), of which roughly 7% are trucks.

How long is IH 45 NB Onramp over West Dallas Street?

The structure is 568 ft (173.1 m) long with a longest span of 73 ft (22.3 m) and a deck 31 ft wide.

Who owns IH 45 NB Onramp over West Dallas Street?

It is owned by the State Highway Agency.