How much do (surface level) large-bore oil/gas pipelines cost? There's not necessarily a requirement to place it underground. The biggest saving over rail is p

How much do (surface level) large-bore oil/gas pipelines cost? There's not necessarily a requirement to place it underground. The biggest saving over rail is probably the much lighter weight of the capsules, which should require much less ground prep and foundations than laying rail that can support tens/hundreds of tons.