US Bridges

IH 45 SB over Nasa RD 1 (nasa Bypass)

Good

Harris County, Texas · 1.4 MI NW of FM 518 · Structure no. 121020050003161

Built
2008
17 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
330 ft
3 main spans
Daily traffic
92,230
2023 count
Owner
State
State Highway Agency

About this bridge

IH 45 SB over Nasa RD 1 (nasa Bypass) is a prestressed concrete stringer/multi-beam or girder carrying IH 45 SB over Nasa RD 1 (nasa Bypass) in Harris County, Texas. It was built in 2008, so it is 17 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 92,230 vehicles a day, roughly 4% of them trucks, projected to reach 129,122 by 2042. The structure is 330 ft (100.6 m) long and 102 ft wide.

CarriesIH 45 SB
CrossesNasa RD 1 (nasa Bypass)
Location1.4 MI NW of FM 518
RouteInterstate 45
StateTexas
Coordinates29.52119, -95.12496
Functional classUrban Principal Arterial - Interstate

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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length330 ft (100.6 m)
Longest span108 ft (32.9 m)
Deck width102 ft (31.2 m)
Roadway width100 ft (30.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic92,230 (2023)
Projected traffic129,122 by 2042
Trucks4%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 IH 45 SB over Nasa RD 1 (nasa Bypass) built?

It was built in 2008, making it 17 years old in 2025.

What condition is IH 45 SB over Nasa RD 1 (nasa Bypass) 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 October 2024.

How much traffic does IH 45 SB over Nasa RD 1 (nasa Bypass) carry?

About 92,230 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is IH 45 SB over Nasa RD 1 (nasa Bypass)?

The structure is 330 ft (100.6 m) long with a longest span of 108 ft (32.9 m) and a deck 102 ft wide.

Who owns IH 45 SB over Nasa RD 1 (nasa Bypass)?

It is owned by the State Highway Agency.