Ih 45 SB over Nasa Rd 1 (nasa Bypass)
Harris County, Texas · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ih 45 SB over Nasa Rd 1 (nasa Bypass) in Harris County, Texas, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2008, making it 17 years old at the 2025 inventory.
- It carries about 92,230 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 2,011 of the 4,040 inventoried bridges in Harris County rated good (49.8%); 24 (0.6%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated October 2024, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (29.52119, -95.12496)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 330 ft |
| Location | 1.4 Mi NW of FM 518 |
| NBI structure number | 121020050003161 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Texas department of transportation.
Busiest bridges in Harris County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ih 10 over Drain | 2007 | 405,615 | Good |
| Ih 10 over Rummel Creek | 2007 | 387,238 | Good |
| Ih 10 over Rummel Creek & Trib | 2007 | 387,238 | Good |
| IH 10/Campbell Rd over Drainage Ditch | 2005 | 373,095 | Good |
| Ih 10 over Hcfcd Ditch | 2006 | 333,229 | Good |
| House-hahl Road over Big Cypress Creek | 2015 | 307,170 | Good |
All bridges nearby: Harris County, TX bridge conditions · every bridge in Harris County · Texas bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.