Home › Texas › Brazoria County › FM 523 over East Union Bayou

FM 523 over East Union Bayou

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

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

FM 523 over East Union Bayou in Brazoria 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 6 (satisfactory condition) on the 0-9 scale.
It was built in 1980, making it 45 years old at the 2025 inventory.
It carries about 11,903 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 233 of the 629 inventoried bridges in Brazoria County rated fair (37.0%); 14 (2.2%) 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 multiple box beam
Length	about 149 ft
Location	0.15 Mi S of SH 332
NBI structure number	120200100301014
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
SH 288 over Drainage Ditch	1972	125,494	Good
FM 523 over Old Oyster Creek	1988	83,339	Good
SH 288 NB over FM 2234	1990	59,850	Fair
SH 288 over Drainage Ditch	1972	56,525	Fair
SH 288 SB over FM 2234	1990	54,353	Good
SH 6 over Unnamed Channel	2004	49,733	Good