Ord 2001-077 - Laserfiche WebLink

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Impervious cover means impermeable surfaces, such as pavement or rooftops, which prevent the infiltration of water into the soil and bedrock. The area of impervious cover at a site will be the area of the impermeable surface measured horizontally. The area of impervious cover for a surface may be reduced based on data acceptable to the engineering director showing that the surface has a significant degree of permeability. Intermediate waterway means any river, creek, stream, channel, or other drainageway watercourse that drains a watershed of at least 250 acres and no more than 1,000 acres. Major recharge feature means a sensitive geologic feature or manmade feature that, because of its characteristics and setting, is likely to cause a significant quantity of direct recharge of surface water to the Edwards Aquifer, and has a potential recharge rating of more than 20 points on a geologic assessment prepared to TNRCC standards by a qualified geologist. Major waterway means any river, creek, stream, channel, or other drainageway watercourse that drains a watershed of 1,000 acres or more. Manmade feature means a feature, including but not limited to, closed depressions, wells, borings and excavations. Minor recharge feature means a sensitive geologic feature or manmade feature that, because of its characteristics and setting, may cause small quantities of recharge of surface water to recharge the Edwards Aquifer, and has a potential recharge rating of less than 15 points on a geologic assessment prepared to TNRCC standards by a qualified geologist. Minor waterway means any river, creek, stream, channel or other drainageway watercourse that drains a watershed of at least 50 acres and no more than 250 acres. Moderate recharge feature means a sensitive geologic feature or manmade feature that, because of its characteristics and setting, is likely to cause small quantities of direct recharge of surface water to directly recharge the Edwards Aquifer, and has a potential recharge rating of 15 to 20 points, inclusive, on a geologic assessment prepared to TNRCC standards by a qualified geologist. Natural drainage means the characteristics of surface drainage where no disturbance of natural features, soils, or vegetation has occurred. lOO-vear tloodolain means an area of land that is subiect to a one per cent or greater chance of flooding in any given year, based on developed conditions existing as of the date a development application is accepted for filing, and not based on proiected or anticipated future build-out for a watershed. Permanent BMPs means best management practices used to prevent and control pollution from development regulated activities after construction is completed. C:\TEMP\Edwards Regulations revision final.doc 6