Ih 20 over Allen Branch
Smith County, Texas · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ih 20 over Allen Branch in Smith County, Texas, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1961, making it 64 years old at the 2025 inventory.
- It carries about 38,112 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 218 of the 428 inventoried bridges in Smith County rated fair (50.9%); 3 (0.7%) are rated poor.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (32.48199, -95.50892)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 54 ft |
| Location | 0.8 Mi E of SH 110 |
| NBI structure number | 102120049504053 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Texas department of transportation.
Busiest bridges in Smith County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 69 over West Mud Creek | 1956 | 46,059 | Fair |
| Ih 20 over Rattlesnake Creek | 1961 | 38,914 | Fair |
| Sl 323 over W Mud CR Tr | 1956 | 38,634 | Fair |
| Ih 20 over Allen Branch Trib | 1961 | 38,112 | Fair |
| Sl 323 over Indian Cr | 1956 | 36,533 | Fair |
| Ih 20 over Prairie Crk Trib | 1962 | 35,901 | Fair |
All bridges nearby: Smith County, TX bridge conditions · every bridge in Smith County · Texas bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.