Well, that is not something that you find very often. Especially out west. Archive: https://archive.today/GMGet From the post: >>Denver Water was working in the neighborhood of Sloan Lake on a construction project last year until it suddenly halted when crews found a centuries-old water pipe made of a “highly unusual” material. According to a newly published report, Denver Water said it began the project at the end of 2023 and into January by digging up old pipes south of Federal Boulevard and West 25th Avenue intersection for a pedestrian safety and stormwater improvement project.