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Transit Mix Concrete Co. <br /> Reference: Bishop-Brogden Associates, Inc., 2016. Transit Mix— Hitch Rack Ranch — Review and <br /> Response to Public Notice Comments Related to Ground Water. Submitted to Jerry <br /> Schnabel and Bob Stabo. July 11, 2016. <br /> Society of Explosive Engineers, Inc., "The World of Explosives", 2015. Frequently Asked <br /> Questions. Retrieved June 7, 2016, from http://explosives.org/frequently-asked- <br /> questions/ (http://explosives.org/frequently-asked-questions/) <br /> Surface Water <br /> Objector Comment: Little Turkey Creek is significant to the ecosystem and wildlife and drains a <br /> large basin to the west and needs to be able to handle large storm events. The permit application <br /> does not adequately demonstrate that the water management structures will prevent erosion or <br /> unauthorized release of pollutants to the surface drainage system. There has been a history of <br /> flooding in the Little Turkey Creek canyon,with four floods in the past 20 years causing significant <br /> damage to the Little Turkey Creek Road within Section 16. There are several sections of the road <br /> that run beside Little Turkey Creek in the lower canyon that are only a few feet above the level <br /> of the creek bed. Removal of vegetation and soil will increase the frequency and severity of <br /> flooding. Failure of water management structures and flows from reclamation ditches could <br /> cause flooding and blockage of the Little Turkey Creek Road. There should be no impacts to the <br /> riparian corridor. <br /> Response: Down drain ditches discharge to sediment detention basins designed to contain <br /> runoff from the 100-yr, 24-hr storm event, with all structures designed using the most <br /> conservative conditions, typically the greatest disturbance area. The stormwater management <br /> system design follows guidelines established by El Paso County and the City of Colorado Springs <br /> and are discussed in detail in Exhibit G of the July 21, 2016 permit submittal. Also, a Spill <br /> Prevention, Control, and Countermeasure (SPCC) plan to prevent impacts to water quality will be <br /> developed and submitted to Colorado Department of Public Health and Environment (CDPHE) <br /> prior to construction. A larger storm event may overwhelm the stormwater management <br /> system, but Little Turkey Creek would already be flooding as it has in previous storms according <br /> to the public comments. An engineering evaluation of Little Turkey Creek Road, included with <br /> this permit submittal, demonstrates that flooding on Little Turkey Creek Road will not increase <br /> due to quarry development. <br /> The riparian corridor is limited to the area immediately along Little Turkey Creek as presented <br /> in Exhibit J of the February 19, 2016 permit submittal, and the quarry design includes 100-ft <br /> Hitch Rack Ranch Quarry Permit Application M-2016-010 <br /> Responses to Objection Letters <br /> July 28, 2016 8 <br />