The proponent, Keeyask Hydro Power Limited Partnership, (a partnership between Manitoba Hydro and four Manitoba First Nations), submitted a project description for the Keeyask Generating Station to Canadian Environmental Assessment Agency (The Agency) for review under the Canadian Environmental Assessment Act (CEAA) August 31, 2011. The Agency determined that a comprehensive study, which commenced November 29, 2011, was required and made available funding under its Participant Funding Program available.

A Manitoba Environment Act license would also be required. The proponents filed an Environment Act Proposal Form (EAPF) and a "Scoping Document for the Environmental Assessment of the Keeyask Generation Project" with Manitoba Conservation Environmental Assessment and Licensing Branch (EALB) December 9, 2011. Public comments can be filed until January 31, 2012.