►
From YouTube: Sanitary Sewer Relining
Description
Arlington County’s sanitary sewer system includes 465 miles pipes and 13 lift stations. The Arlington County Capital Improvement Program funds the annual relining of approximately 1.5 percent of the system, or about seven miles of pipe using a cured-in-place pipe (CIPP), a trenchless rehabilitation process.
Take a look inside the process, as the County conducted its work on the S Four Mile Run sanitary sewer line.
A
To
that
particularly
inspected
this
line,
the
four
mile
run
relief
line.
What
it
showed
was
that
the
interior
concrete
on
the
inside
of
this
pipe
was
deteriorated
if
we
had
to
dig
that
up
and
replace
the
pipe
in
its
current
location,
that's
probably
a
six
to
twelve
month
construction
project
to
replace
about
it,
3/4
of
the
file
where
the
pipe
costing
millions
of
dollars
this
will
be
cured
in
place
pipe
and
all
we
have
to
do-
is
open
up
each
of
manholes
along
the
way
and
invert.
A
The
liner
goes
in
sort
of
like
a
tube
sock
and
air
or
water
or
steam
inverts
that
liner
inside
of
the
bike,
then
the
steam
or
hot
water
cooks,
the
resin
over
for
a
small
pipe
over
a
four
to
six
hour
period
for
a
large
pipe
like
the
what
we're
looking
at
today
over
a
10
to
24
hour
period,
depending
on
temperatures
and
the
size
of
the
pipe
involved.
The
benefits
are
that
you
don't
have
to
dig
up
the
entire
street.