We were hired by another construction company that had a large contract with a local railroad, to line several cast iron and steel gray water lines that were leaking at the rail yard. We installed 3,4, and 6 inch Cure-In-Place liners in different areas of the rail yard. The Cure-In-Place liner was the perfect method for rehabilitating the gray water lines, due to the location of the gray water lines. Some of the lines ran under the tracks and in between two large holding tanks, were excavating would have been very costly and time consuming. The Cure-In-Place liner method stopped the leaks and prevented any ground water infiltration.