The
US
arm
of
the
Canadian
pipeline
giant
said
in
a
securities
filing
that
it
had
received
a
final
order
from
the
US
Environmental
Protection
Agency
earlier
this
month
"requiring
additional
containment
and
active
recovery
of
submerged
oil"
relating
to
the
ruptured
Line
6B
crude
that
spewed
oil
into
the
Kalamazoo
River
in
July
2010.
The
incident
in
south-central
Michigan
saw
more
than
20,000
barrels
of
heavy
crude
spilt
into
the
river,
marking
the
largest
onshore
oil
spill
in
US
history.
Enbridge
said
total
clean-up
costs
will
be
about
$175
million…