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US 377 over Big Bluff Creek

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

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

US 377 over Big Bluff Creek in Mason 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 1989, making it 36 years old at the 2025 inventory.
It carries about 906 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 46 of the 84 inventoried bridges in Mason County rated fair (54.8%); 1 (1.2%) 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	Prestressed concrete stringer or multi-beam girder
Length	about 80 ft
Location	5.70 Mi SW of SH 29
NBI structure number	141570014904036
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 87/SH 29 over Koocks Branch	2015	7,181	Good
US 87 over Draw	1929	5,279	Fair
US 87 over Gamels Branch	1935	4,653	Fair
SH 29 over Comanche Creek	1939	3,472	Fair
US 87 over Martin Creek	1929	3,118	Fair
US 87 over Hog Branch	1948	3,118	Fair