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structures to mimic predevelopment <br />hydrology and reduce erosion. If excess <br />water does not leave the site through con- <br />centrated runoff, then the soil remains in <br />place. If rain and snowmelt are allowed to <br />sheet flow and infiltrate, then the fractures <br />that supply mountain wells are recharged. <br />As rain and snowmelt recharge fractures, <br />water stays in the mountain system longer <br />which helps maintain base flow in moun- <br />tain streams in the summer season. Infil- <br />tration and flow diffusing structures <br />should be considered as a method to pre- <br />vent property damage and to provide <br />improved ecological and fiscal stewardship <br />in a mountain development. <br />Michelle DeLaria has been the <br />Stormwater Quality Coordinator in Jeffer- <br />son County, Colorado for four years. She <br />welcomes further discussion on this topic <br />and can be reached at mdelaria@jeffco.us. <br />John A. Jehn P.G. is a licensed geologist <br />with over 20 years experience in the environ- <br />mental and civil engineering fields. John heads <br />the Construction Management, Stormwater <br />Management and Environmental and project <br />oversight divisions atJEHNEngineering. <br />r <br />/' <br />CanSpillym <br />Canwaterm <br />FloodMaster Barriers Inc. <br />develops, manufactures and <br />markets emergency response <br />products that protect lives, <br />property and the environment. <br />FloodMaster is in the business <br />of providing totally integrated <br />last resort emergency deploy- <br />ment products, services and <br />solutions that address major <br />natural disasters, strife or <br />humanitarian relief operations <br />worldwide. <br />Summer 2006 11 <br />