In a large bowl, combine the cucumbers, water, vinegar, chopped dill, sugar, garlic, salt, pickling spice, dill seed, and red pepper flakes. Stir, and let stand at room temperature for 2 hours, until the sugar and salt dissolve.
Remove the cucumbers to three 1 1/2 pint wide mouth jars, placing 4 cucumbers into each jar. Ladle in the liquid from the bowl to cover. Place a sprig of fresh dill into each jar, and seal with lids. Refrigerate for 10 days before eating. Use within 1 month.