Russian
gas
monopoly
Gazprom
said
it
will
need
to
invest
an
additional
510
billion
roubles
($16.9
billion)
to
upgrade
domestic
pipe
capacity,
increasing
the
overall
cost
of
South
Stream
to
€29
billion
($39
billion)
from
the
previous
figure
of
around
$21
million,
Reuters
reported.
Most
of
the
upgrade
expense,
232
billion
roubles,
would
be
spent
on
boosting
the
capacity
of
a
trunkline
from
Ukhta
in
northern
Russia
to
Torzhok,
230
kilometres
north
of
Moscow.
Gazprom
leads
an
international
consortium
that
started
construction
in
December
of
the
gas
pipeline
that
will
run
from
Russia
across
the
Black
Sea
to
Bulgaria
and
onwards…
