As was noted earlier today on this blog, there was a power outage early this morning that resulted in most communities on the Yukon grid losing their electricity source. The outage occurred at 3 a.m. and most communities had their power restored by about 5 a.m.
Our crews have now determined that the outage was caused when a component of our Whitehorse hydro #4 unit failed. The component (official name is Programmable Logic Controller) is essentially a sophisticated computer and the main brain of the hydro unit. Its failure caused damage to other essential components.
Staff are working to systematically identify all issues with the damaged equipment. It could be several days before hydro unit #4 is back in service. In the meantime, we have sufficient hydro power from our other available units in Whitehorse, Mayo and Aishihik.
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