Information Disclosure

Pursuant to 18 CFR Section 358.7(a

Date Posted 2/23/2017

Northwest Pipeline regrets to inform its shippers that on January 18, 2017, Northwest was made aware that supplemental information associated with replacement shippers’ nominations that are used to calculate a releasing shippers OFO obligation was being inadvertently shared with a releasing shipper’s Asset Manager (AMA). The error dates back to 2011 when Northwest received FERC approval to begin including the replacement shippers contract activity on its OFO notices to reduce the administrative burdens to comply with an OFO pursuant to Section 14.15 (e)(viii) of the General Terms and Conditions.

The supplemental information consists of aggregated nomination information by contract, excluding any specific supply or delivery point detail. Prior to 2011, Northwest’s system allowed a releasing shipper to designate their AMA as a contact person to receive its OFO obligations since at that time it didn’t include the supplemental information. Unfortunately, an analysis was not made to evaluate the impact of OFO notices sent to AMAs prior to the tariff change. Upon discovery, Northwest immediately removed AMAs from the OFO distribution list until it received written consent from the releasing shipper and all impacted replacement shippers.

During its investigation, Northwest also found one instance where a releasing shipper was receiving a replacement shipper’s OFO notice. Upon discovery, Northwest immediately removed the releasing shipper from the OFO distribution.

Date Posted 2/23/2017

Northwest Pipeline regrets to inform its shippers that the User ID’s pertaining to the pre-arranged capacity release shippers were visible in the Offer window in Northwest Passage.  The display error was viewable only if a shipper opened the Offer Status History tab. Upon discovery, Northwest immediately fixed the error by replacing the User ID with asterisks.