March 24 — Texans have learned the hard way cast iron and steel pipe, while considered state-of-the-art at the time, has not aged well. The pipes can corrode and leak. The pipes can become stressed under shifting soil and leak. When it rains, North Texas clay soils can compound the problem by creating new paths for any leaking gas to migrate and collect, rather than disperse in the air.

— Denton Record Chronicle