US 181 over San Antonio River
Karnes County, Texas · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 181 over San Antonio River in Karnes County, Texas, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1961 and reconstructed in 1991, making it 64 years old at the 2025 inventory.
- It carries about 6,786 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 75 of the 145 inventoried bridges in Karnes County rated fair (51.7%); 2 (1.4%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: substructure 5 to 6.
- Its most recent inspection on record is dated April 2024, on a 24-month routine inspection cycle.
- 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 → (28.97746, -98.01031)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 5 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 533 ft |
| Location | 0.5 Mi SE of FM 791 |
| NBI structure number | 161290010005081 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 7: scour countermeasures installed |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Texas department of transportation.
Busiest bridges in Karnes County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 181 over Escondido Creek Draw | 1952 | 17,860 | Good |
| US 181 over Escondido Creek Draw | 1952 | 15,747 | Good |
| US 181 over Escondido Creek | 1952 | 15,330 | Fair |
| FM 2102 over Panther Creek | 1942 | 7,537 | Fair |
| US 181 over San Antonio River Draw | 1929 | 6,914 | Fair |
| US 181 over Turkey Creek | 1992 | 6,757 | Good |
All bridges nearby: Karnes County, TX bridge conditions · every bridge in Karnes County · Texas bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.