north american gas trade i quarterly focus planned projects which may promote natural with mexico introduction and overview the second quarter 1997 report of imports exports featured a on cross border between united states this article is follow up to revisits updates status some pipeline discussed in examines number other facilities were proposed subsequent our few existing pipelines are bi directional thus have capability serving either or depending market conditions supply availability these new if completed would greatly enhance infrastructure us increase throughput capacity for by more than 1 billion cubic feet bcf