Cooling
Water
Intake
Structure
(
CWIS)
Information
The
following
questions
apply
to
cooling
water
intake
structure(
s)
at
oil
and
gas
extraction
facility.
If
you
own
more
than
one
facility,
please
copy
the
questions
and
answer
separately
for
each
facility.

Company:
Prospect
or
Field
Name:
OCS
Lease
and
Block:
Platform
Name:

QUESTIONS
YOUR
RESPONSE
1.
Number
of
CWISs:
2**

2.
Brief
description
of
each
CWIS
(
e.
g.,
sea
chest,
simple
pipe):
Simple
pipe
3.
Rough
dimensions
of
each
CWIS
and
indicate
whether
CWIS
has
existing
flange:
8"
diameter
4.
Screen
type
(
e.
g.,
strainer,
wedge
wire)
with
mesh
size:
Screen
5.
Total
daily
maximum
design
water
intake
volume
of
each
CWIS:
~
700
GPM
6.
Total
daily
water
intake
volume
of
each
CWIS
(
set­
up/
drilling):
0
GPM
7.
Total
daily
cooling
water
intake
volume
of
each
CWIS
(
set­
up/
drilling):
0
GPM
8.
Design
through
screen
velocity
of
each
CWIS
(
i.
e.,
Q=
V*
A)
(
set­
up/
drilling):
NA
9.
List
purposes
of
cooling
water
intake
(
e.
g.,
cool
crude
oil,
produced
water,
power
generators,
drill
pipe
brakes):
NA
10.
List
purposes
of
non­
cooling
water
intakes
(
e.
g.,
fire
water,
hotel
loads)
other
than
ballast
water:
Past
operations­
compressor
cooling,
fire
water
11.
Total
volume
of
water
intake
for
ballasting,
duration
of
ballast
intake,
and
through
screen
velocity
of
ballast
intake:
NA
12.
Describe
mitigation
measures
used
for
reducing
impingement
and
entrainment
of
aquatic
organisms
(
e.
g.,
sea
chest
screens,
strainers):
screens
13.
Describe
measures
used
to
reduce
or
prevent
biofouling:
NA
14.
Describe
mitigation
measures
used
for
reducing
exotic
species
migration
through
ballast
water:
NA
**
The
Spark
and
Spurr
platforms
have
not
operated
their
cooling
water
systems
have
not
been
operated
for
over
7
years.
The
cooling
water
system,
in
total,
has
been
decommissioned.
These
platforms
are
unmanned,
remotely
operated,
gas
production
facilities
without
drilling,
compression,
or
fire
water
suppression
systems.
Any
details
of
size
and
capacity
are
design
only
and
do
not
represent
current
operations.
