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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 August 20, 2026

US 181 over San Antonio River in Karnes County, Texas, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
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.
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.

Component ratings


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

Source: FHWA National Bridge Inventory, 2025 data as reported by the Texas department of transportation.

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