Brookfield Asset Management (BAM) SC 13D Transalta Corp

Exhibit 99.1

JOINT FILING AGREEMENT

This will confirm the agreement among the undersigned that the Schedule 13D filed on or about this date and any amendments thereto with respect to beneficial ownership by the undersigned of the common shares, no par value of TransAlta Corporation is being filed on behalf of each of the undersigned in accordance with Rule13d-1(k)(1) under the Securities Exchange Act of 1934, as amended.

March 2, 2020	EAGLE CANADA COMMONHOLDINGS LP, by its general partner BIF IV CDN SPLIT LP, by its general partnerBIF IV CDN GP LP, by its general partnerBIF IV CDN GP LTD.
	By:	/s/ Adrienne Moore
		Name: Adrienne Moore
		Title: Vice-President
	BIF IV EAGLE NR CARRY LP, by its general partner BIF IV LTIP CANADA SPLITTER LP, by its general partnerBIF IV CDN SPLIT LP, by its general partnerBIF IV CDN GP LP, by its general partnerBIF IV CDN GP LTD.
	By:	/s/ Adrienne Moore
		Name: Adrienne Moore
		Title: Vice-President
	BIF IV LTIP CANADA SPLITTER LP, by its general partner BIF IV CDN SPLIT LP, by its general partnerBIF IV CDN GP LP, by its general partnerBIF IV CDN GP LTD.
	By:	/s/ Adrienne Moore
		Name: Adrienne Moore
		Title: Vice-President
	BIF IV CDN SPLIT LP, by its general partnerBIF IV CDN GP LP, by its general partnerBIF IV CDN GP LTD.
	By:	/s/ Adrienne Moore
		Name: Adrienne Moore
		Title: Vice-President
	BIF IV CDN GP LP, by its general partnerBIF IV CDN GP LTD.
	By:	/s/ Adrienne Moore
		Name: Adrienne Moore
		Title: Vice-President

BIF IV CDN GP LTD.
By:	/s/ Adrienne Moore
	Name: Adrienne Moore
	Title: Vice-President
BIG HOLDINGS LP, by its general partner BROOKFIELD INFRASTRUCTURE GROUP LIMITED
By:	/s/ James Rickert
	Name: James Rickert
	Title: President
BROOKFIELD INFRASTRUCTURE GROUP LIMITED
By:	/s/ James Rickert
	Name: James Rickert
	Title: President
BAM INFRASTRUCTURE GROUP L.P., by its general partnerBAM LIMITED
By:	/s/ Kathy Sarpash
	Name: Kathy Sarpash
	Title: Vice-President and Secretary
BAM LIMITED
By:	/s/ Kathy Sarpash
	Name: Kathy Sarpash
	Title: Vice-President and Secretary
BROOKFIELD ASSET MANAGEMENT INC.
By:	/s/ Kathy Sarpash
	Name: Kathy Sarpash
	Title: Vice-President
PARTNERS LIMITED
By:	/s/ Brian D. Lawson
	Name: Brian D. Lawson
	Title: President