Northwest Natural Gas Company Contracts & Agreements

Letter agreement, dated March 20, 2020, between NW Natural Gas Storage LLC and SENSA Holdings LLC, amending the Purchase and Sale Agreement, dated June 28, 2018, as amended (Filed With SEC on March 25, 2020)

Credit Agreement, dated as of March 23, 2020, among Northwest Natural Gas Company and the lenders party thereto, with U.S. Bank National Association as administrative agent (Filed With SEC on March 25, 2020)

Description of securities registered under Section 12 of the Exchange Act of 1934 (Filed With SEC on March 2, 2020)

Form of Restricted Stock Unit Award Agreement under Long Term Incentive Plan (2020) (Filed With SEC on March 2, 2020)

Annual Incentive Plan for NW Natural Gas Storage, LLC, as amended effective January 1, 2020 (Filed With SEC on March 2, 2020)

Executive Annual Incentive Plan, effective January 1, 2020 (Filed With SEC on March 2, 2020)

Form of Change in Control Severance Agreement between Northwest Natural Gas Company and each executive officer, as amended and restated as of March 1, 2020 (Filed With SEC on March 2, 2020)

Form of Long Term Incentive Award Agreement under Long Term Incentive Plan (2020-2022) (Filed With SEC on March 2, 2020)

Letter agreement, dated February 26, 2020, between NW Natural Gas Storage LLC and SENSA Holdings LLC, amending the Purchase and Sale Agreement, dated June 28, 2018, as amended (Filed With SEC on March 2, 2020)

Supplemental Executive Retirement Plan of Northwest Natural Gas Company, 2018 Restatement, as amended July 25, 2019 (Filed With SEC on August 6, 2019)

Credit Agreement, dated as of June 27, 2019, among NW Natural Water Company, LLC, Northwest Natural Holding Company, the lenders party thereto, and Bank of Montreal, as... (Filed With SEC on August 6, 2019)

Form of Restricted Stock Unit Award Agreement under Long Term Incentive Plan (2019) (Filed With SEC on March 1, 2019)

Form of Director Restricted Stock Unit Award Agreement under Long Term Incentive Plan (2018) (Filed With SEC on March 1, 2019)

Form of Indemnity Agreement as entered into between Northwest Natural Gas Company and each director and certain executive officers (Filed With SEC on March 1, 2019)

Form of Indemnity Agreement as entered into between Northwest Natural Holding Company and each director and certain executive officers (Filed With SEC on March 1, 2019)

Executive Annual Incentive Plan, effective January 1, 2019 (Filed With SEC on March 1, 2019)

Annual Incentive Plan for NW Natural Gas Storage, LLC, as amended effective January 1, 2019 (Filed With SEC on March 1, 2019)

Form of Long Term Incentive Award Agreement under Long Term Incentive Plan (2019-2021) (Filed With SEC on March 1, 2019)

Credit Agreement, dated as of October 2, 2018, among Northwest Natural Gas Company and the lenders party thereto, with JPMorgan Chase Bank, N.A. as administrative agent and Bank... (Filed With SEC on October 3, 2018)

Amendment to Agreement and Plan of Merger between Northwest Natural Gas Company, Northwest Natural Holding Company, and NWN Merger Sub, Inc. dated September 26, 2018 (Filed With SEC on October 1, 2018)

Northwest Natural Holding Company Long Term Incentive Plan, as amended and restated as of October 1, 2018 (Filed With SEC on October 1, 2018)

Form of Change in Control Severance Agreement between Northwest Natural Gas Company and each executive officer, as amended and restated as of October 1, 2018 (Filed With SEC on October 1, 2018)

Northwest Natural Gas Company Deferred Compensation Plan for Directors and Executives, as amended and restated as of October 1, 2018 (Filed With SEC on October 1, 2018)

Northwest Natural Gas Company Executive Deferred Compensation Plan, as amended and restated as of October 1, 2018 (Filed With SEC on October 1, 2018)

Northwest Natural Gas Company Directors Deferred Compensation Plan, as amended and restated as of October 1, 2018 (Filed With SEC on October 1, 2018)

Northwest Natural Gas Company Executive Supplemental Retirement Income Plan, as amended and restated as of October 1, 2018 (Filed With SEC on October 1, 2018)

Northwest Natural Gas Company Supplemental Executive Retirement Plan, as amended and restated as of October 1, 2018 (Filed With SEC on October 1, 2018)

Northwest Natural Gas Company Executive Annual Incentive Plan, as amended and restated as of October 1, 2018 (Filed With SEC on October 1, 2018)

Northwest Natural Gas Company Supplemental Trust, as amended and restated as of October 1, 2018 (Filed With SEC on October 1, 2018)

Northwest Natural Gas Company Umbrella Trust For Executives, as amended and restated as of October 1, 2018 (Filed With SEC on October 1, 2018)

Northwest Natural Gas Company Umbrella Trust For Directors, as amended and restated as of October 1, 2018 (Filed With SEC on October 1, 2018)

Twenty-third Supplemental Indenture, providing for, among other things, First Mortgage Bonds, 4.11% Series due 2048, dated as of September 1, 2018, by and between Northwest... (Filed With SEC on September 10, 2018)

Executive Annual Incentive Plan, effective January 1, 2018 (Filed With SEC on February 23, 2018)

Northwest Natural Gas Company Long Term Incentive Plan, as amended and restated effective May 25, 2017 (Filed With SEC on February 23, 2018)

Form of Long Term Incentive Award Agreement under Long Term Incentive Plan (2018-2020) (Filed With SEC on February 23, 2018)

Form of Restricted Stock Unit Award Agreement under Long Term Incentive Plan (2018) (Filed With SEC on February 23, 2018)

Form of Special Restricted Stock Unit Agreement between the Company and an executive officer, dated September 30, 2016 (Filed With SEC on February 23, 2018)

Form of Hire-On Bonus Agreement between the Company and an executive officer, date September 30, 2016 (Filed With SEC on February 23, 2018)

Cash Retention Agreement between the Company and an executive officer, dated as of March 1, 2018 (Filed With SEC on February 23, 2018)

DIRECTOR RESTRICTED STOCK UNIT AWARD AGREEMENT (Filed With SEC on August 2, 2017)

RESTRICTED STOCK UNIT AWARD AGREEMENT (Filed With SEC on May 8, 2017)

SPECIAL RETENTION RESTRICTED STOCK UNIT AWARD AGREEMENT (Filed With SEC on April 24, 2017)

NORTHWEST NATURAL GAS COMPANY EXECUTIVE ANNUAL INCENTIVE PLAN (Filed With SEC on February 27, 2017)

PERFORMANCE SHARE LONG TERM INCENTIVE AGREEMENT (Filed With SEC on February 27, 2017)

RESTRICTED STOCK UNIT AWARD AGREEMENT (Filed With SEC on February 27, 2017)

AMENDMENT TO RESTRICTED STOCK UNIT AWARD AGREEMENTS (Filed With SEC on February 27, 2017)

ANNUAL INCENTIVE PLAN NW Natural Gas Storage LLC (company, or the company) (Filed With SEC on February 27, 2017)

NW Natural Gas Storage, LLC Long Term Incentive Plan (Filed With SEC on February 27, 2017)

NORTHWEST NATURAL GASCOMPANY880,000 Shares of Common StockUNDERWRITING AGREEMENTDated: November 10,2016 TABLE OFCONTENTS (Filed With SEC on November 16, 2016)

===================================================================== NORTHWEST NATURAL GAS COMPANY TO DEUTSCHE BANK TRUST COMPANY AMERICAS (FORMERLY KNOWN AS BANKERS TRUST... (Filed With SEC on November 2, 2016)

SPECIAL RETENTION RESTRICTED STOCK UNIT AWARD AGREEMENT (Filed With SEC on November 2, 2016)

RESTRICTED STOCK UNIT AWARD AGREEMENT (Filed With SEC on August 2, 2016)

AMENDED AND RESTATED CASH RETENTION AGREEMENT (Filed With SEC on August 2, 2016)

NORTHWEST NATURAL GAS COMPANY (Filed With SEC on August 2, 2016)

DIRECTOR RESTRICTED STOCK UNIT AWARD AGREEMENT (Filed With SEC on May 3, 2016)

NORTHWEST NATURAL GAS COMPANY EXECUTIVE ANNUAL INCENTIVE PLAN (Filed With SEC on February 26, 2016)

LONG TERM INCENTIVE AWARD AGREEMENT (Filed With SEC on February 26, 2016)

AMENDMENT TO LONG TERM INCENTIVE AWARD AGREEMENT (Filed With SEC on February 26, 2016)

RESTRICTED STOCK UNIT AWARD AGREEMENT (Filed With SEC on February 26, 2016)

ANNUAL INCENTIVE PLAN NW Natural Gas Storage LLC (company, or the company) (Filed With SEC on February 26, 2016)

NW Natural Gas Storage, LLC Long Term Incentive Plan (Filed With SEC on February 26, 2016)

NORTHWEST NATURAL GAS COMPANY (Filed With SEC on November 3, 2015)

SPECIAL RETENTION RESTRICTED STOCK UNIT AWARD AGREEMENT (Filed With SEC on June 24, 2015)

LONG TERM INCENTIVE AWARD AGREEMENT (Filed With SEC on February 27, 2015)

RESTRICTED STOCK UNIT AWARD AGREEMENT (Filed With SEC on May 2, 2014)

LONG TERM INCENTIVE AWARD AGREEMENT (Filed With SEC on February 28, 2014)

RESTRICTED STOCK UNIT AWARD AGREEMENT (Filed With SEC on March 1, 2013)

2012 ANNUAL INCENTIVE PLAN NW Natural Gas Storage LLC (company, or the company) As Amended on February 2, 2012 (Filed With SEC on March 1, 2013)

NW Natural Gas Storage, LLC Long Term Incentive Plan (Filed With SEC on March 1, 2013)

NORTHWEST NATURAL GAS COMPANY LONG TERM INCENTIVE PLAN (Filed With SEC on March 1, 2013)

LONG TERM INCENTIVE AWARD AGREEMENT (Filed With SEC on March 1, 2013)

CREDIT AGREEMENT dated as of December 20, 2012 among NORTHWEST NATURAL GAS COMPANY, as Borrower, TheLenders Party Hereto, JPMORGAN CHASE BANK, N.A., as Administrative Agent, and... (Filed With SEC on December 21, 2012)

NORTHWEST NATURAL GAS COMPANY TO DEUTSCHE BANK TRUST COMPANY AMERICAS (FORMERLY KNOWN AS BANKERS TRUST COMPANY) AND STANLEY BURG (SUCCESSOR TO R. G. PAGE AND J. C. KENNEDY), (Filed With SEC on October 31, 2012)

RESTRICTED STOCK UNIT AWARD AGREEMENT (Filed With SEC on December 20, 2011)

NORTHWEST NATURAL GAS COMPANY LONG TERM INCENTIVE PLAN (as amended as of December 15, 2011) (Filed With SEC on December 20, 2011)

NORTHWEST NATURAL GAS COMPANY SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN 2011 RESTATEMENT (Filed With SEC on November 4, 2011)

FORM OF SERVICE AGREEMENT APPLICABLE TO FIRM TRANSPORTATION SERVICE UNDER RATE SCHEDULE FTS-l (Filed With SEC on August 3, 2011)

Rate Schedule TF-1 Service Agreement Contract No. 100138 (Filed With SEC on August 3, 2011)

Rate Schedule TF-1 Service Agreement Contract No. 139153 (Filed With SEC on August 3, 2011)

Rate Schedule TF-1 Service Agreement Contract No. 100058 (Filed With SEC on August 3, 2011)

Rate Schedule TF-1 Service Agreement Contract No. 138065 (Filed With SEC on August 3, 2011)

Rate Schedule TF-1 Service Agreement Contract No. 100005 (Filed With SEC on August 3, 2011)

Rate Schedule TF-1 Service Agreement Contract No. 139154 (Filed With SEC on August 3, 2011)

SEPARATION AGREEMENT (Filed With SEC on February 25, 2011)

NW NATURAL GAS STORAGE, LLC CONFIDENTIAL INTEROFFICE MEMORANDUM (Filed With SEC on November 5, 2010)

NorthwestNatural Gas Company $300,000,000 Medium-TermNotes, Series B (Filed With SEC on February 26, 2010)

NORTHWESTNATURAL GAS COMPANY EXECUTIVESUPPLEMENTAL RETIREMENT INCOME PLAN (2010Restatement) NORTHWESTNATURAL GAS COMPANY EXECUTIVESUPPLEMENTAL RETIREMENT INCOME PLAN... (Filed With SEC on February 26, 2010)

NORTHWESTNATURAL GAS COMPANY SUPPLEMENTALEXECUTIVE RETIREMENT PLAN 2010RESTATEMENT (Filed With SEC on February 26, 2010)

NON-STATUTORYSTOCK OPTION AGREEMENT RESTATEDSTOCK OPTION PLAN (Filed With SEC on February 26, 2010)

NORTHWESTNATURAL GAS COMPANY DEFERRED COMPENSATION PLAN FORDIRECTORS AND EXECUTIVES (Filed With SEC on February 26, 2010)

INDEMNITEE (Filed With SEC on February 26, 2010)

NORTHWEST NATURAL GAS COMPANY EXECUTIVE ANNUAL INCENTIVE PLAN (Filed With SEC on February 26, 2010)

AGREEMENTTO RECOUPMENT PROVISIONS OFEXECUTIVE ANNUAL INCENTIVE PLAN (Filed With SEC on February 26, 2010)

LONG TERM INCENTIVE AWARD AGREEMENT (Filed With SEC on February 26, 2010)

LONG TERM INCENTIVE AWARD AGREEMENT (Storage Business) (Filed With SEC on February 26, 2010)

Northwest Natural Gas Company $300,000,000 Medium-Term Notes, Series B Distribution Agreement (Filed With SEC on March 23, 2009)

NORTHWEST NATURAL GAS COMPANY EXECUTIVE DEFERRED COMPENSATION PLAN (Filed With SEC on March 2, 2009)

NORTHWEST NATURAL GAS COMPANY DIRECTORS DEFERRED COMPENSATION PLAN (Filed With SEC on March 2, 2009)

FIRM TRANSPORTATION SERVICE AGREEMENT (Filed With SEC on March 2, 2009)

Rate Schedule TF 2 Service Agreement Contract: No. 100310 (Filed With SEC on March 2, 2009)

FORM OF RATE SCHEDULE SGS-2F SERVICE AGREEMENT Rate Schedule 8GS-2F Service Agreement. (Filed With SEC on March 2, 2009)

SERVICE AGREEMENT (Liquefaction-Storage Gas Service under Rate Schedule LS-1) (Filed With SEC on March 2, 2009)

Rate Schedule TF-2 Service Agreement Contract No. 100309 (Filed With SEC on March 2, 2009)

Rate Schedule TP-2 Service Agreement Contract: No. 100308 (Filed With SEC on March 2, 2009)

SERVICE AGREEMENT RATE SCHEDULE FS (Filed With SEC on March 2, 2009)

SERVICE AGREEMENT APPLICABLE TO FIRM TRANSPORTATION SERVICE (Filed With SEC on March 2, 2009)

ARTICLE 1 Scope of Agreement (Filed With SEC on March 2, 2009)

TARIFF SUPPLEMENT NO. 1-6 AMENDMENT AND RESTATEMENT OF (Filed With SEC on March 2, 2009)

Rate Schedule TF-1 Service Agreement Amendment Contract No. 100058 (Filed With SEC on February 29, 2008)

Rate Schedule TF-1 Service Agreement Contract No. 136455 (Filed With SEC on February 29, 2008)

AGREEMENT BETWEEN MARCH POINT COGENERATION COMPANY AND NORTHWEST NATURAL GAS COMPANY (Filed With SEC on February 29, 2008)

NORTHWEST NATURAL GAS COMPANY EXECUTIVE SUPPLEMENTAL RETIREMENT INCOME PLAN (Filed With SEC on February 29, 2008)

NORTHWEST NATURAL GAS COMPANY SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN (Filed With SEC on February 29, 2008)

NORTHWEST NATURAL GAS COMPANY EXECUTIVE DEFERRED COMPENSATION PLAN (Filed With SEC on February 29, 2008)

NORTHWEST NATURAL GAS COMPANY DIRECTORS DEFERRED COMPENSATION PLAN (Filed With SEC on February 29, 2008)

NORTHWEST NATURAL GAS COMPANY DEFERRED COMPENSATION PLAN FOR DIRECTORS AND EXECUTIVES EFFECTIVE JANUARY 1, 2005 RESTATED FEBRUARY 28, 2008 TABLE OF CONTENTS (Filed With SEC on February 29, 2008)

LONG TERM INCENTIVE AWARD AGREEMENT (Filed With SEC on February 29, 2008)

CONSENT TO AMENDMENT OF DEFERRED COMPENSATION PLAN FOR DIRECTORS AND EXECUTIVES (Filed With SEC on February 29, 2008)

SECOND AMENDMENT TO EMPLOYMENT AGREEMENT (Filed With SEC on October 1, 2007)

CREDIT AGREEMENT (Filed With SEC on June 1, 2007)

Northwest Natural Gas Company $160,000,000 Medium-Term Notes, Series B Distribution Agreement (Filed With SEC on February 28, 2007)

NORTHWEST NATURAL GAS COMPANY RESTATED STOCK OPTION PLAN (Filed With SEC on February 28, 2007)

FORM OF LONG TERM INCENTIVE AWARD AGREEMENT (Filed With SEC on February 27, 2007)

CONSENT (Filed With SEC on December 19, 2006)

December ___, 2006 (Filed With SEC on December 19, 2006)

AMENDED AND RESTATED 1998 ESRIP CHANGE IN CONTROL APPENDIX (Filed With SEC on December 19, 2006)

NORTHWEST NATURAL GAS COMPANY SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN (Filed With SEC on December 19, 2006)

NORTHWEST NATURAL GAS COMPANY EXECUTIVE DEFERRED COMPENSATION PLAN (Filed With SEC on December 19, 2006)

NORTHWEST NATURAL GAS COMPANY DIRECTORS DEFERRED COMPENSATION PLAN (Filed With SEC on December 19, 2006)

AMENDMENT TO EMPLOYMENT AGREEMENT (Filed With SEC on December 19, 2006)

NORTHWEST NATURAL GAS COMPANY EXECUTIVE DEFERRED COMPENSATION PLAN (Filed With SEC on November 2, 2006)

NORTHWEST NATURAL GAS COMPANY DEFERRED COMPENSATION PLAN FOR DIRECTORS AND EXECUTIVES EFFECTIVE JANUARY 1, 2005 RESTATED AS OF JANUARY 1, 2007 TABLE OF CONTENTS (Filed With SEC on November 2, 2006)

NORTHWEST NATURAL GAS COMPANY DIRECTORS DEFERRED COMPENSATION PLAN (Filed With SEC on November 2, 2006)

RESTRICTED STOCK BONUS AGREEMENT (Filed With SEC on July 28, 2006)

FORM OF EXECUTIVE CHANGE IN CONTROL SEVERANCE AGREEMENT December 15, 2005 (Filed With SEC on December 16, 2005)

NORTHWEST NATURAL GAS COMPANY NON-EMPLOYEE DIRECTORS STOCK COMPENSATION PLAN January 1, 1989 (Filed With SEC on December 16, 2005)

NORTHWEST NATURAL GAS COMPANY DIRECTORS DEFERRED COMPENSATION PLAN (Filed With SEC on December 16, 2005)

NORTHWEST NATURAL GAS COMPANY (Filed With SEC on December 16, 2005)

NORTHWEST NATURAL GAS COMPANY SUPPLEMENTAL TRUST (Filed With SEC on December 16, 2005)

FORM OF LONG TERM INCENTIVE AWARD AGREEMENT (Filed With SEC on December 16, 2005)

FORM OF RESTRICTED STOCK BONUS AGREEMENT (Filed With SEC on December 16, 2005)

FORM OF CREDIT AGREEMENT (Filed With SEC on November 3, 2005)

FORM OF LONGTERM INCENTIVE AWARD AGREEMENT (Filed With SEC on November 3, 2005)

FORM OF NON-STATUTORY STOCK OPTION AGREEMENT RESTATED STOCK OPTION PLAN (Filed With SEC on November 3, 2005)

SUMMARY OFEXECUTIVE COMPENSATION NAMED EXECUTIVE OFFICERS (Filed With SEC on August 4, 2005)

Summary of Compensation Arrangements for Margaret D. Kirkpatrick, Vice (Filed With SEC on June 1, 2005)

NORTHWEST NATURAL GAS COMPANY NON-EMPLOYEE DIRECTORS STOCK COMPENSATION PLAN January 1, 1989 (Filed With SEC on April 29, 2005)

NORTHWEST NATURAL GAS COMPANY SUPPLEMENTAL TRUST (Filed With SEC on March 1, 2005)

NORTHWEST NATURAL GAS COMPANY (Filed With SEC on March 1, 2005)

NORTHWEST NATURAL GAS COMPANY SUMMARY OF EXECUTIVE COMPENSATION NAMED EXECUTIVE OFFICERS (Filed With SEC on March 1, 2005)

NW Natural (Filed With SEC on February 11, 2005)

NORTHWEST NATURAL GAS COMPANY SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN (Filed With SEC on December 20, 2004)

NORTHWEST NATURAL GAS COMPANY DEFERRED COMPENSATION PLAN FOR DIRECTORS AND EXECUTIVES EFFECTIVE JANUARY 1, 2005 TABLE OF CONTENTS (Filed With SEC on November 18, 2004)

CREDIT AGREEMENT BETWEEN (Filed With SEC on October 7, 2004)

Northwest Natural Gas Company (Filed With SEC on October 4, 2004)

NORTHWEST NATURALGAS COMPANY First Mortgage Bonds Secured Medium-Term Note, Series B (Filed With SEC on October 4, 2004)

NORTHWEST NATURALGAS COMPANY Unsecured Medium-Term Note, Series B (Filed With SEC on October 4, 2004)

NORTHWEST NATURAL GAS COMPANY NON-EMPLOYEE DIRECTORS STOCK COMPENSATION PLAN January 1, 1989 (Filed With SEC on September 28, 2004)

NORTHWEST NATURAL GAS COMPANY EXECUTIVE SUPPLEMENTAL RETIREMENT INCOME PLAN (2004 Restatement) (Filed With SEC on September 28, 2004)

FORM OF RESTRICTED STOCK BONUS AGREEMENT (Filed With SEC on September 28, 2004)

UNDERWRITING AGREEMENT (Filed With SEC on April 2, 2004)

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Northwest Natural Gas Company Contracts & Agreements