The cache is NOT at the posted coordinates. They don't even make good parking.
North 43 and West 079 are assumed.
Terrain rating reflects the difficulty when cache was placed. This will vary with the season and conditions (likely a 3-3.5 under perfect conditions). The difficulty refers to the puzzle. The cache itself should be an easy find when you get to GZ.
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You can check your answers for this puzzle on Geochecker.com.