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5.2.3 "Aquifer" means a hydrogeologic unit or interval of consolidated and/or unconsolidated <br /> geologic material that is capable of storing and transmitting water. "Aquifer" includes both <br /> the saturated and unsaturated interval but does not include the confining layerunit that <br /> separates aquifers. These rules provide different construction requirements for three <br /> general classifications of aquifers (Types 1-141-3) and one particular aquifer(Laramie- <br /> Fox Hills). <br /> 5.2.3.1 5.2.2.1"Administratively defined aquifer" means a hydrogeologic unit that has <br /> been defined in rules promulgated by the State Engineer, identified in a well permit, <br /> identified in a decree, or included in a list of aquifers approved by the Board. <br /> 5.2.3.2 "Type 11 aquifer" means an aquifer that is overlain by a confining layerunit of <br /> relatively impermeable geologic material. A Type 11 Aquifer may also be known <br /> as a confined aquifer.-, but the water level could potentially be lower than the top <br /> of the aquifer. <br /> 5.2.2.2 <br /> 5.2.3.3 "Type 142 aquifer" means an aquifer consisting of consolidated geologic <br /> material or crystalline rock that is not overlain by a confining layerunit. A Type <br /> 142 Aquifer may also be known as an unconfined bedrock aquifer. Type 2 <br /> aquifers can be identified on geologic maps as outcropping or subcropping <br /> below unconsolidated units. <br /> 5.2.2.3 <br /> 5.2.3.4 "Type 1443 aquifer" means an aquifer that consists of unconsolidated geologic <br /> material including alluvial, colluvial or other unconsolidated materials. Type 1-I.43 <br /> aquifers may contain localized impermeable layers that do not act as hydraulic <br /> boundaries between distinct aquifers. A common example of a Type 443 aquifer <br /> is an alluvial aquifer. <br /> 5.2.3.5 5.2.2.1"Laramie-Fox Hills aquifer" means that aquifer found below the shales <br /> of the Laramie Formation and above the Pierre Shale, including the basal <br /> sandstone units of the Laramie Formation and the siltstones and sandstones of <br /> the Fox Hills Sandstone. The Laramie-Fox Hills aquifer exists both inside and <br /> outside the Administrative Denver Basin boundary (Rule 5.2.1). <br /> 5.2.3.6 5.2.3 "Unconfined San Luis Valley aquifer" means a geologic formation, <br /> groups of formations, or parts of formations underlying portions of Water Division <br /> No. 3 consisting in part of unconsolidated clays, silts, sands, gravels, <br /> interbedded volcanic rock, or other materials and containing saturated <br /> permeable materials that yields water under water table conditions that is or may <br /> be extracted and applied to beneficial use. The Unconfined San Luis Valley <br /> aquifer is found above the Blue Clay and is also identified as Layer 1 in the <br /> RGDSS Groundwater Model. <br /> 5.2.3.7 "Confined San Luis Valley Aquifer" means the formations, groups of <br /> formations, or parts of formations underlying portions of Water Division 3 <br /> consisting in part of unconsolidated clays, silts, sands, gravels, and interbedded <br /> volcanic rock and containing saturated permeable material that yields water <br /> under artesian pressure that is or may be extracted and applied to a beneficial <br /> use. The Confined Aquifer includes any formation, group of formations, or part of <br /> a formation containing saturated permeable material that yielded water under <br /> artesian pressure during the period 1978-2000,whether or not the water level in <br /> the formation, group of formations, or part of a formation is under artesian <br /> pressure conditions at the time of the proposed new withdrawal of groundwater. <br /> The Confined San Luis Valley aquifer is found below the Blue Clay and is also <br /> identified as Layer 2, 3, 4, and 5 in the Rio Grande Model (need citation) <br /> 5.2.4 "Authorized individual" means a professional engineer registered in Colorado, a <br /> professional geologist as defined in section 23-41-208(b), C.R.S., or a person directly <br /> employed by or under the supervision of a registered professional engineer or professional <br /> geologist. AlternatelyAlternatively, an individual may be designated an Authorized Individual <br />