Canadian law protects navigation on all navigable waters in British Columbia, including Powell Lake.
If you own, or want to build, a structure (known as a "work", like a dock or breakwater) on or near Powell Lake, you may need permission from Transport Canada.
Right now, it's free to have your project approved, but Transport Canada will soon start charging a fee for all applications.
Find out if your project needs to be approved here: https://tc.canada.ca/en/programs/navigation-protection-program/apply-npp
If you have any questions, please contact Transport Canada at: NPPPAC-PPNPAC@tc.gc.ca or 604-775-8867.
For more information on the Canadian Navigable Waters Act, visit https://laws-lois.justice.gc.ca/eng/acts/n-22/page-1.html.