Rail Route In Tysons An Uphill Challenge – The Post
It is easy to forget that Tysons Corner is around 500 feet above sea level, as opposed to the Potomac River which is 1 foot above sea level. This presents quite a challenge for the engineers planning the new line from West Falls Church. The cost involved in doing this could sink the whole deal/ and then in five years, when it is addressed again, it would cost much more.

This is a bullet that needs to be bitten, the stalling has gone on for too long. Graphic: The Remaking of Tysons Corner.