An 18-inch natural gas and fuel pipeline crosses a tributary to Perkiomen Creek in Montgomery County, Pennsylvania in a 50-foot wide right-of-way. The creek bed is composed of shale, gravel, and sand while the banks are composed of clay, rock, and gravel.
A 20-inch natural gas pipeline crosses Little Sandy Creek in Pontotoc County, Oklahoma. The creek bed is composed of clay, sand, gravel, and riprap. Broken concrete was previously placed on the right-descending bank but has scattered.
20-inch products pipeline runs parallel to a railroad track in Imperial County, California. Both the pipeline and the railroad are crossed by the 250-foot wide Mammoth Wash. Flash floods caused lateral migration and eroded 3 to 6 feet of the right-descending bank.