SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
X	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* INFRASTRUX HOLDINGS, LLC (Last) (First) (Middle) C/O TENASKA CAPITAL MANAGEMENT, LLC 14302 FNB PARKWAY (Street) OMAHA NE 68154 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Willbros Group, Inc.\NEW\ [ WG ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 07/12/2017
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	07/12/2017		J(1)		8,083,235	D	$0.00(1)	60,730	D
Common Stock	07/12/2017		J(1)		394,176	A	$0.00(1)	394,176	I	By Tenaska Power Fund, L.P.
Common Stock	07/12/2017		J(1)		13,063	A	$0.00(1)	13,063	I	By Tenaska PF G, LLC

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person* INFRASTRUX HOLDINGS, LLC (Last) (First) (Middle) C/O TENASKA CAPITAL MANAGEMENT, LLC 14302 FNB PARKWAY (Street) OMAHA NE 68154 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* TENASKA POWER FUND, LP (Last) (First) (Middle) C/O TENASKA CAPITAL MANAGEMENT, LLC 1044 N 115TH STREET, SUITE 400 (Street) OMAHA NE 68154 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* TENASKA PF G, LLC (Last) (First) (Middle) C/O TENASKA CAPITAL MANAGEMENT, LLC 1044 N 115TH STREET, SUITE 400 (Street) OMAHA NE 68154 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* TPF INFRASTRUX HOLDINGS, LLC (Last) (First) (Middle) C/O TENASKA CAPITAL MANAGEMENT, LLC 1044 N 115TH STREET, SUITE 400 (Street) OMAHA NE 68154 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. The shares were disposed of, or acquired, as applicable, pursuant to a distribution-in-kind to the partners of Tenaska Power Fund, L.P. ("TPF"), with TPF retaining ownership of shares for which the distribution was declined. TPF is the sole owner of TPF InfrastruX Holdings, LLC ("TPF Holdings") and the manager of InfrastruX Holdings, LLC ("IF Holdings"). TPF Holdings is the majority owner of IF Holdings. Tenaska PF G, LLC is a general partner of TPF. IF Holdings is the owner of the shares reported as disposed of herein. All other reporting persons disclaim beneficial ownership of shares reported hereby, except to the extent of any pecuniary interest therein.

	David Dickey, Vice President & General Counsel, Tenaska PF G, LLC, General Partner of Tenaska Power Fund, L.P., Manager of INFRASTRUX HOLDINGS, LLC	07/14/2017
	David Dickey, Vice President & General Counsel, Tenaska PF G, LLC, General Partner of Tenaska Power Fund, L.P., Manager of TPF INFRASTRUX HOLDINGS, LLC	07/14/2017
	David Dickey, Vice President & General Counsel, Tenaska PF G, LLC, General Partner of Tenaska Power Fund, L.P.	07/14/2017
	David Dickey, Vice President & General Counsel, Tenaska PF G, LLC	07/14/2017
	** Signature of Reporting Person	Date
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