EXHIBIT 1

JOINT FILING AGREEMENT

Pursuant to Rule 13(d)-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, each of the undersigned acknowledges and agrees that the foregoing statement on Schedule 13D is filed on behalf of the undersigned and that all subsequent amendments to this statement on Schedule 13D (including this Amendment No. 2) shall be filed on behalf of the undersigned without the necessity of filing additional joint acquisition statements. Each of the undersigned acknowledges that it shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the other, except to the extent that he or it knows or has reason to believe that such information is inaccurate.

Dated as of December 5, 2017.

OCM GW HOLDINGS, LLC
By:	OCM Principal Opportunities Fund III, L.P.
Its:	Managing Member
By:	OCM Principal Opportunities Fund III GP, L.P.
Its:	General Partner
By:	Oaktree Fund GP I, L.P.
Its:	General Partner
By:	/s/ Brian Price
Name:	Brian Price
Title:	Authorized Signatory
OCM PRINCIPAL OPPORTUNITIES FUND III, L.P.
By:	OCM Principal Opportunities Fund III GP, L.P.
Its:	General Partner
By:	Oaktree Fund GP I, L.P.
Its:	General Partner
By:	/s/ Brian Price
Name:	Brian Price
Title:	Authorized Signatory
OCM PRINCIPAL OPPORTUNITIES FUND III GP, L.P.
By:	Oaktree Fund GP I, L.P.
Its:	General Partner
By:	/s/ Brian Price
Name:	Brian Price
Title:	Authorized Signatory
OAKTREE FUND GP I, L.P.
By:	/s/ Brian Price
Name:	Brian Price
Title:	Authorized Signatory

OAKTREE CAPITAL I, L.P.
By:	OCM Holdings I, LLC
Its:	General Partner
By:	/s/ Brian Price
Name:	Brian Price
Title:	Vice President
OCM HOLDINGS I, LLC
By:	/s/ Brian Price
Name:	Brian Price
Title:	Vice President
OAKTREE HOLDINGS, LLC
By:	Oaktree Capital Group, LLC
Its:	Managing Member
By:	/s/ Brian Price
Name:	Brian Price
Title:	Vice President
OAKTREE CAPITAL GROUP, LLC
By:	/s/ Brian Price
Name:	Brian Price
Title:	Vice President
OAKTREE CAPITAL GROUP HOLDINGS GP, LLC
By:	/s/ Brian Price
Name:	Brian Price
Title:	Vice President
OCM CRIMSON HOLDINGS, LLC
By:	OCM Principal Opportunities Fund IV, L.P.
Its:	Managing Member
By:	OCM Principal Opportunities Fund IV GP, L.P.
Its:	General Partner
By:	OCM Principal Opportunities Fund IV GP Ltd.
Its:	General Partner
By:	Oaktree Capital Management, L.P.
Its:	Director
By:	/s/ Brian Price
Name:	Brian Price
Title:	Vice President
OCM PRINCIPAL OPPORTUNITIES FUND IV, L.P.
By:	OCM Principal Opportunities Fund IV GP, L.P.
Its:	General Partner

By:	OCM Principal Opportunities Fund IV GP Ltd.
Its:	General Partner
By:	Oaktree Capital Management, L.P.
Its:	Director
By:	/s/ Brian Price
Name:	Brian Price
Title:	Vice President
OCM PRINCIPAL OPPORTUNITIES FUND IV GP, L.P.
By:	OCM Principal Opportunities Fund IV GP Ltd.
Its:	General Partner
By:	Oaktree Capital Management, L.P.
Its:	Director
By:	/s/ Brian Price
Name:	Brian Price
Title:	Vice President
OCM PRINCIPAL OPPORTUNITIES FUND IV GP LTD.
By:	Oaktree Capital Management, L.P.
Its:	Director
By:	/s/ Brian Price
Name:	Brian Price
Title:	Vice President
OAKTREE CAPITAL MANAGEMENT, L.P.
By:	/s/ Brian Price
Name:	Brian Price
Title:	Vice President
OAKTREE HOLDINGS, INC.
By:	/s/ Brian Price
Name:	Brian Price
Title:	Vice President
OCM FIE, LLC
By:	Oaktree Capital Management, L.P.
Its:	Managing Member
By:	/s/ Brian Price
Name:	Brian Price
Title:	Vice President