Eastern Snake Plain Aquifer Area of Common Ground Water Supply Boundary

The 2024 Legislature passed Senate Bill 1341, expanding the area of common ground water supply (ACGWS) for the Eastern Snake Plain Aquifer (ESPA) to reflect the Eastern Snake Plain Aquifer Model boundary, v2.2. This dataset displays the outline of the area where model grid cells are used in the Eastern Snake Plain Aquifer Modeling (ESPAM) effort (v. 2.1 and 2.2). The Eastern Snake Plain Aquifer model (version 2) is used for water management decisions, including conjunctive administration of surface and groundwater. Idaho Code 42-233c allows the Idaho Department of Water Resources Director to expand, hold hearings, and issue orders regarding the expansion of the Areas of Common Groundwater Supply. The boundary of the Eastern Snake Plain Aquifer Areas of Common Groundwater Supply will continue to evolve as new tributaries are added to the existing boundary. This boundary represents the Eastern Snake Plain Aquifer Model (ESPAM) boundary and includes tributary basins that have been incorporated into the Area of Common Groundwater Supply through final orders of the Director that are no longer subject to protest or appeal.2024年立法机构通过了参议院第1341号法案，将东部蛇原含水层（Eastern Snake Plain Aquifer, ESPA）的公共地下水供应区（Area of Common Groundwater Supply, ACGWS）范围予以扩展，以匹配版本2.2的东部蛇原含水层模型边界。本数据集展示了东部蛇原含水层建模（Eastern Snake Plain Aquifer Modeling, ESPAM）工作（版本2.1与2.2）中所使用的模型网格单元对应区域的轮廓。东部蛇原含水层模型（版本2）可用于支撑水资源管理决策，涵盖地表水与地下水联合调度管理范畴。《爱达荷州法典》第42-233c条款授权爱达荷州水资源部部长可对公共地下水供应区开展扩展工作、举行听证会并发布相关扩张命令。随着新支流被纳入现有边界，东部蛇原含水层公共地下水供应区的边界将持续演变。本次划定的边界对应东部蛇原含水层模型（ESPAM）边界，包含经部长最终命令纳入公共地下水供应区、且不再受异议或上诉约束的支流流域。