We deal with this in many res/lakes in KS. It all depends on the fertility of the watershed and how it will affect the impoundment.
Zebra mussel spores are free-floating, meaning they do not require a host to transport them, such as the gills of a fish as many similar species do. If there is water inflow from a body of water with positive confirmation of Zebra mussels, any amount of water-even a wet rag, can/will transport spores. They can be transported in the cooling system of an outboard or I/O, the few ounces of water remaining in the bottom of a boat can move them.
Based on the movement we've seen in KS, I would have to strongly disagree with the statement that Zebra Mussels cannot survive in your pond, especially with a connected water source.
My opinion is it's a matter of time before you see them, but if you have normal fertility water they likely will hurt nothing.

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