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FM 770 over Daisetta Swamp

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

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

FM 770 over Daisetta Swamp in Liberty County, Texas, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1970, making it 55 years old at the 2025 inventory.
It carries about 2,645 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 126 of the 240 inventoried bridges in Liberty County rated good (52.5%); 4 (1.7%) 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.

Component ratings


Structure	Concrete stringer or multi-beam girder
Length	about 40 ft
Location	2.40 Mi S of FM 834
NBI structure number	201460109602026
Condition class	Good

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