Mildred Lake Mine Extension East (MLX-E) Project

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The Mildred Lake Mine Extension East (MLX-E) will sustain bitumen production at Syncrude’s Mildred Lake operation as existing mining areas are depleted, using existing extraction and upgrading facilities without requiring new tailings ponds.

Regulatory approval was secured in 2020. Development includes infrastructure relocation, a production haul road and transmission-line relocation to accommodate the mine extension.

Construction is progressing in 2026, with Suncor confirming ongoing investment in its first- and second-quarter results. A first-production date has not been confirmed.

Municipality:	Wood Buffalo
Sector:	Oil and Gas
Type:	Oil Sands: Mining
Schedule:	Commencing 2026
Estimated Cost:	N/A
Stage:	Under Construction Projects are proposed from the time they are announced to the start of construction. For substage fields, see our methodologies page.
Developer:	Syncrude Canada Ltd.
Project Website:	https://www.suncor.com/en-ca/what-we-do/oil-sands/syncrude-mildred-lake-extension