Post Date: October 27, 2000 
Category: MAINTENANCE 
Subcategory: NWP MONTHLY MAINTENANCE 
Subject: November 2000 Maintenance ( Revised) 

Notice Text: 
All Shippers Letter #01-142 
Date:?? ??????? 10/27/00 
Time:?? ??????? 11:00hrs 

TO:???? ??????? All Shippers 
Subject:??????? ????????????????????? November 2000 Maintenance 

WILLIAMS GAS PIPELINE-WEST / Northwest Pipeline SCHEDULED MAINTENANCE 
as posted 10 - 27, 2000 

The following maintenance work is scheduled on Williams Gas Pipeline-West / 
Northwest 
Pipeline (WGP-W) during the month of November 2000.? The scheduled 
maintenance is 
Northwest's most recent projection of potential system impacts.? This 
schedule is provided to assist you in planning your business for the coming 
month. The impacts are estimates, which could change depending on other 
scheduling factors.? If any scheduled maintenance activities change, an 
updated notice will be posted to the EBB as soon as possible.

UPCOMING NOVEMBER? SCHEDULED MAINTENANCE 
? 

Foundation Creek Meter Station Installation has been completed. 

October 30, 2000 -December 1,? (*Dates are estimates and may change) 

Vernal Pigging Project 

Results from the smart pigging program on the 26" pipeline from mainline 
valve 2-7 
(M.P. 213) to mainline valve 2-10 (M.P. 263) have been analyzed.? Based on 
data received from the pig, NWP personnel will be investigating each valve 
section until all anomalies are addressed.?? No impacts to gas flows are 
anticipated at this time.? Any changes to anticipated impacts will be 
communicated as soon as information becomes available.

For additional information, contact your Marketing Services Representative. 

JR