2016-09-14_PERMIT FILE - M2016010 (4)

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The water management plan needs to indicate every location where those structures will cross our road and provide much more detail to demonstrate how they will prevent damage to our road at those points. Transit Mix admits that"It is likely that storms larger than the 100-year, 24-hour event will be controlled to some extent, but sediment and volumes from larger storms will probably exceed the capability of the system to provide full control." Today, during a major flood event, water flows down numerous draws across the entire width of the proposed mining area. In the future, drainage within each pit will be directed into a limited number of impoundment ponds. While release of water from these ponds over a 72 hour period may mitigate flood damage during lesser flood events, overtopping of these ponds during major floods could cause catastrophic damage to our road in the areas below these ponds. If the impoundment ponds are overwhelmed by a major rainfall event, all of the water from a pit will be directed into the impoundment pond at the bottom of the pit and then over the '*spillway" of the impoundment pond. For at least some of the impoundment ponds, the water would then flow across our road on the way down to the stream — thereby damaging our road. Regardless of whether Transit Mix uses the 4.6 inches of the NOAA Atlas 2 or the 5.34—5.4 inches of the NOAA Atlas 14,they cannot guarantee that a future rainfall event will not exceed whatever rainfall amount they eventually use for their designs. They therefore cannot-prove that their proposed water management structures w ill adequately handle all potential future flows during the life of the quarry and therefore cannot definitively state tate"no waters from developed areas will reach the existing road surface, and there will be no increase in erosion from the proposed mine on Little Turkey Creek Road." Besides handling single day rainfall events, I am deeply concerned about the ability of the storm water management structures to handle multi-day events, similar to what occurred in May 2015. Our weather station measured almost 10 inches of rain over a period of a few days that month. • Damage from Wear and Tear by Heavy Loads. In their engineering analysis of Little Turkey Creek Road (Exhibit S), Transit Mix admits that a gravel road can fail if it is travelled by heavy loads, particularly during wet conditions. They then claim that no heavy equipment associated with the quarry will travel Little Turkey Creek Road, but fail to mention that heavy quarry equipment will, in fact, be continuously driving across Little Turkey Creek Road where the new quarry road intersects Little Turkey Creek Road. Given the frequency of heavy quarry equipment traffic through that intersection,that portion of our road may very well be damaged. 3) Transit Mix has still not adequately demonstrated that 'Areas outside of the affected land shall be protected from slides or damage occurring during the mining operation and reclamation.' • Some areas along Little Turkey Creek Road outside of the affected area are unstable and prone to rockfalls. Continued blasting over 55 years may make sections of the hillside above Little Turkey Creek Road even more unstable than they are today. I am not just concerned about rockfalls during, or immediately after blasting, but rockfalls triggered because hillsides have been destabilized by the blasting. 4) It is unclear whether a Pre-blasting Survey will be done for any portions of our road outside of the affected area and whether the actions from the Mitigation Plan in their Pre-Blast Survey Plan only apply to properties for which a pre-blast survey has been performed or for a structure (including our road)that has been potentially damaged by blasting.