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SH 105 over Trinity River

Liberty County, Texas · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

SH 105 over Trinity River in Liberty County, Texas, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1967, making it 58 years old at the 2025 inventory.
It carries about 4,651 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 110 of the 240 inventoried bridges in Liberty County rated fair (45.8%); 4 (1.7%) 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.

Component ratings


Structure	Continuous steel stringer or multi-beam girder
Length	about 1,350 ft
Location	4.0 Mi NW of SH 146
NBI structure number	201460095101004
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 59 over Atsf RR & Drain	1987	35,560	Good
US 59 over Sl 573	1987	33,938	Good
US 59 over SL 573 & Ditch	1987	29,958	Fair
US 59 over Drainage Ditch	1987	29,958	Fair
US 59 Ml & Sbfr over Drainage Ditch	1987	29,124	Good
US 59 Ml & Sbfr over Little Tarkington Bayou	1987	29,124	Fair