-----Original Message-----
From: 	"Bode, Miki" <Miki.Bode@Williams.com>@ENRON  
Sent:	Monday, January 28, 2002 12:08 PM
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Subject:	NWP System Notice - 02-010 Clay Basin Shut-in & Testing

Post Date: January 28, 2002
Category: CRITICAL NOTES
Subcategory: MISCELLANEOUS
Subject: 02-010 Clay Basin Shut-in & Testing

Notice Text:
All Shippers Letter 02-010
Date:	1/28/02
Hrs:	12:00

Notice to Northwest Pipeline Shippers
Questar Pipeline posted the following notice on January 23, 2002
regarding Clay Basin capacity holders.
Notice identifier 1400
_______________

NOTICE TO CLAY BASIN CAPACITY HOLDERS

As previously reported in October 2001, Questar Pipeline Company
is planning to perform inventory verification and deliverability
tests at its Clay Basin storage facility beginning April 2, 2002.
These tests will involve a 14-day shut-in of Clay Basin for
reservoir gas inventory verification followed immediately by a
2-day field deliverability test. In an effort to allow our
shippers time to minimize the impact of the testing as much as
possible, we are providing the following information on the
planned testing.

During the 14-day shut in, from April 2, 2002 through April 15,
2002, Clay Basin customers will not be able to utilize their
storage service. Beginning at 8:00 a.m. on April 16, 2002 an
Operational Flow Order will be issued to facilitate the
deliverability flow test. During the 2-day flow test period, all
FSS capacity holders will be required to take a pro-rata share of
their withdrawal capacity based on their contracted percentage of
Clay Basin's total working gas storage capacity. No injections
will be allowed during the flow test.


The planned deliverability test will be conducted as follows:

During each test day, all storage customers will be required to
make a withdrawal and corresponding transportation nomination. The
volume of the required withdrawal nomination will be calculated as
follows:

April 16, 2002 allocation:
Customers Contracted Percentage of Working Capacity x 213 MDth =
Daily flow requirement *

April 17, 2002 allocation:
Customers Contracted Percentage of Working Capacity x 106.5 MDth =
Daily flow requirement *

Example: A storage customer holds annual FSS storage capacity of
1,065,000 Dth. Its minimum nomination would be calculated as
follows:

April 16 Flow Requirement: 1,065,000 Dth/54,581,250 Dth x 213,000
Dth = 4,156 Dth *

April 17 Flow Requirement: 1,065,000 Dth/54,581,250 Dth x 106,500
Dth = 2,078 Dth *



* Important Note: The flow rates and daily flow requirements above
are based on the minimum flow rates necessary to conduct the
deliverability test. Depending on conditions in the basin at the
time of the test, customers may be required to increase their
withdrawal rates by up to 25%. FSS capacity holders will be
required to have adequate inventory in Clay Basin and
transportation capacity to facilitate the flow test. If it is
necessary to cancel the deliverability test due to conditions
beyond Questar's reasonable ability to prevent or control, Questar
will notify customers of cancellation as soon as possible.

Questar will work with storage customers to facilitate
transportation of their gas supply and to mitigate the impact as
much as possible during the testing period. Please do not hesitate
to contact your Questar marketing or customer service
representative with any questions regarding the upcoming tests.
________________

Northwest Pipeline will assist its shippers in meeting the
flow requirements for the deliverability tests scheduled on
April 16 and 17. Northwest will notify customers as more
information becomes available.

Please contact your Marketing Services Representative for
assistance.

MDR/rm