Exhibit 3.5
FORM OF
CERTIFICATE OF FORMATION
OF
AMGP GP LLC
This Certificate of Formation of AMGP GP LLC (the Company), dated April [ · ], 2017, has been duly executed, and is filed pursuant to Section 18-201 of Delaware Limited Liability Company Act (the Act) to form a limited liability company under the Act.
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 FIRST:  | 
 The name of the Company is: AMGP GP LLC  |    
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 SECOND:  | 
 The address of the registered office required to be maintained by Section 18-104 of the Act is:  |    
Corporation Trust Center
1209 Orange Street
Wilmington, Delaware 19801
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 THIRD:  | 
 The name and the address of the registered agent for service of process required to be maintained by Section 18-104 of the Act is:  |    
The Corporation Trust Company
Corporation Trust Center
1209 Orange Street
Wilmington, Delaware 19801
[Signature Page Follows]
IN WITNESS WHEREOF, the undersigned has executed this Certificate of Formation as of the date first written above.
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 Alvyn A. Schopp  |    
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 Authorized Person  |    
[Signature Page to Certificate of Formation of AMGP GP LLC]