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Photos: Rust stains on Austin’s Waterline skyscraper

A closer look at the rust-colored stains streaking Austin’s Waterline tower during construction downtown.

Published May 21, 2026 at 11:21am by Jay Janner


Rust-colored stains streaking the exterior of Austin’s Waterline tower drew widespread attention online as the skyscraper nears completion in downtown Austin. The marks appeared across sections of the white-and-glass facade of the 74-story building in the Rainey Street District, prompting questions from residents and social media users about what caused the discoloration on Texas’ tallest tower.
Developers with Lincoln Property Co. said the stains resulted from testing the building’s standpipe fire protection system. According to the company, dirt and grime that accumulated during construction washed down parts of the facade during the testing process and are expected to be cleaned.

A stain is seen on The Waterline, a supertall skyscraper under construction in Austin on Monday, May 18, 2026.
Jay Janner/Austin American-Statesman