Ih 45 over Tidal Interchange
Galveston County, Texas · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ih 45 over Tidal Interchange in Galveston 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 1987, making it 38 years old at the 2025 inventory.
- It carries about 71,141 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 189 of the 340 inventoried bridges in Galveston County rated good (55.6%); 9 (2.6%) 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 August 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 → (29.32248, -94.92314)
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 84 ft |
| Location | 0.80 MI SE of SH 6 |
| NBI structure number | 120850050001286 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 4: foundations stable, field review says exposed foundations need protection |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Texas department of transportation.
Busiest bridges in Galveston County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| IH 45 MLs & FRs over Clear Crk Trib | 1998 | 171,700 | Good |
| Ih 45 over FM 518 | 2020 | 144,300 | Good |
| Ih 45 Nbml over FM 646 | 2020 | 115,900 | Good |
| Ih 45 Sbml over FM 646 | 2020 | 115,900 | Good |
| Ih 45 Nbml over Magnolia Bayou | 2020 | 115,900 | Good |
| Ih 45 SB over Magnolia Bayou | 2022 | 115,900 | Good |
All bridges nearby: Galveston County, TX bridge conditions · every bridge in Galveston County · Texas bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.