Considering 60 feet of water column, (this is an approximate depth), exerting approx. 27 psi,  and a reduced pressure of 65 psi in the pipeline,  the differential pressure will allow a small amount of methane to escape at around 38 psi. This is far more environmentally prudent than shutting down the line, allowing it to fill with seawater and silt, displacing trace amounts of crude, and natural gas liquids into the inlet. This will also preserve the option of repairing the line, saving our much needed jobs and future fuel gas needed for crude production. Know the facts before spouting.