Tigris Dr over Drainage Canal
Montgomery County, Texas · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tigris Dr over Drainage Canal in Montgomery County, Texas, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1985, making it 40 years old at the 2025 inventory.
- It carries about 233 vehicles a day (traffic count year 2021).
- Its listed owner is the county highway agency.
- It is one of 477 of the 711 inventoried bridges in Montgomery County rated good (67.1%); 5 (0.7%) are rated poor.
- 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 → (30.11174, -95.2887)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Aluminum or iron culvert |
| Length | about 20 ft |
| Location | 0.25 Mi S of Riverwalk |
| NBI structure number | 121700A64339010 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Texas department of transportation.
Busiest bridges in Montgomery County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ih 45 over Drainage Ditch | 1926 | 243,893 | Fair |
| Ih 45 Sbml over Spring CR | 1990 | 243,893 | Fair |
| Ih 45 Nbml over Spring CR | 1990 | 243,893 | Fair |
| Ih 45 Sbml over Spring CR Rel | 1990 | 243,893 | Fair |
| Ih 45 Nbml over Spring CR Rel | 1990 | 243,893 | Fair |
| Ih 45 over Silverdale Crk | 2007 | 201,083 | Good |
All bridges nearby: Montgomery County, TX bridge conditions · every bridge in Montgomery County · Texas bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.