A verst is an obsolete Russian unit of length defined as 500 sazhen. This makes a verst equal to 1.0668 kilometres.

What does verst mean?

: a Russian unit of distance equal to 0.6629 mile (1.067 kilometers)

What do you mean by upstream?

1 : in the direction opposite to the flow of a stream. 2 : in or to a position within the production stream closer to manufacturing processes make most of its money upstream, selling cheap crude …