FYI on planned blasting at Gross Reservoir today (12/12). The below notification is from Denver Water Board…

I am providing notification of our planned blast per our permit requirements. We plan to blast the Gross Test Quarry on Thursday,
12, 2013, between 1 PM and 5 PM. The reservoir is closed to recreation (due to flooding impacts) and no public access will be allowed within ½ mile of the blast site. We will notify the 70 residents and local groups through the email system we have set up. The blast will be relatively and will use a low amount of charger per millisecond to minimize vibration and sound resulting from the blast.