The cache is NOT at the posted coordinates.
This is a bonus cache for completing my Adventure Lab Cache "Mukilteo Walking Tour - Part 1". To obtain the final coordinates you need to complete the Adventure Lab Cache. Pay attention to the journal entries at the lab caches. There you will be given the coordinates for this cache.
The hours for this cache are dawn to dusk. Do NOT cross the fence, I hid it on the "park side" of it, but out of plain view. There's no need for y'all to pass through the gate.
Please, please, please place back in the EXACT location you found it - this is a high Muggle area. The location has a history of stolen, damaged and ruined caches.
Good luck. Keep calm, and cache on.
Congratulations to DM&K Cachers for FTF.