US Bridges

NASA1 WB / IH45 NB over IH 45 Nbfr

Good

Harris County, Texas · 0.4 MI SE of FM 528 · Structure no. 121020050003163

Built
2009
16 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,994 ft
5 main spans
Daily traffic
24,294
2023 count
Owner
State
State Highway Agency

About this bridge

NASA1 WB / IH45 NB over IH 45 Nbfr is a steel continuous stringer/multi-beam or girder carrying NASA1 WB / IH45 NB over IH 45 Nbfr in Harris County, Texas. It was built in 2009, so it is 16 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 24,294 vehicles a day, roughly 8% of them trucks, projected to reach 30,368 by 2042. The structure is 1,994 ft (607.8 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNASA1 WB / IH45 NB
CrossesIH 45 Nbfr
Location0.4 MI SE of FM 528
RouteInterstate 45
StateTexas
Coordinates29.52246, -95.12384
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5 (+5 approach)
Design loadHS 25 or greater
Structure length1,994 ft (607.8 m)
Longest span280 ft (85.3 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,294 (2023)
Projected traffic30,368 by 2042
Trucks8%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 NASA1 WB / IH45 NB over IH 45 Nbfr built?

It was built in 2009, making it 16 years old in 2025.

What condition is NASA1 WB / IH45 NB over IH 45 Nbfr in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does NASA1 WB / IH45 NB over IH 45 Nbfr carry?

About 24,294 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is NASA1 WB / IH45 NB over IH 45 Nbfr?

The structure is 1,994 ft (607.8 m) long with a longest span of 280 ft (85.3 m) and a deck 29 ft wide.

Who owns NASA1 WB / IH45 NB over IH 45 Nbfr?

It is owned by the State Highway Agency.