Bureau of Land Management's Land and Mineral Legacy Rehost System (LR2000) mineral use cases for the Sagebrush Mineral-Resource Assessment, Idaho, Montana, Nevada, Oregon, Utah, and Wyoming

In 2015, approximately 10 million acres of Federal lands across six western states were proposed for withdrawal from mineral entry by the Bureau of Land Management (BLM) in order to conserve habitat critical for the greater sage-grouse. As a result, the U.S. Geological Survey (USGS) launched the Sagebrush Mineral-Resource Assessment (SaMiRA) project in late-2015 to provide BLM with an assessment of the locatable minerals and an evaluation of the leaseable and saleable minerals within the proposed withdrawal areas. BLM provided Legacy Rehost 2000 System (LR2000) spatial data to the USGS on March 6, 2016 to help identify areas containing mineral leases and claims. The LR2000 system reports BLM land and mineral-use authorizations for oil, gas, and geothermal leasing, rights-of-ways, coal and other mineral development, land and mineral title, mining claims, withdrawals, classifications, and more on federal lands or on federal mineral estate. The spatial data provided here generalize the detailed LR2000 information and related boundaries (for example, small mine claim boundaries) to a larger Public Land Survey System (PLSS) section boundary. The tabular data are summarized by PLSS section and by BLM “serial numbers” (cases). The GIS data consist of polygon vector files whose boundaries are either the PLSS square-mile sections or the PLSS sections grouped by “serial number” to potentially larger areas. The shapefiles present coal, geothermal energy, mineral materials, mining claims, non-energy solid minerals, oil and gas, and plans of operations and notices information and can be used in a geographic information system (GIS) to show the general distribution and density of these BLM land authorizations. These datasets were used in the analysis of locatable, leasable, and salable minerals for the SaMiRA mineral-resource assessment.

2015年，美国西部六个州范围内约1000万英亩的联邦土地被美国土地管理局（Bureau of Land Management, BLM）提议退出矿产准入范畴，以保护对山艾草松鸡（greater sage-grouse）具有关键意义的栖息地。为此，美国地质调查局（U.S. Geological Survey, USGS）于2015年末启动了艾草灌丛矿产资源评估（Sagebrush Mineral-Resource Assessment, SaMiRA）项目，旨在为BLM提供拟退出矿产准入区域内的可定位矿产评估报告，以及可租赁、可售卖矿产的评价分析。2016年3月6日，BLM向USGS提供了旧版重托管2000系统（Legacy Rehost 2000 System, LR2000）的空间数据，以辅助识别包含矿产租赁权与采矿权主张的区域。LR2000系统用于记录联邦土地或联邦矿产地产上的BLM土地与矿产使用授权信息，涵盖油气与地热租赁、通行权、煤炭及其他矿产开发、土地与矿产产权、采矿权主张、土地退出、分类等多项内容。本次提供的空间数据将LR2000的详细信息及相关边界（例如小型采矿权主张边界）概化至更大尺度的公共土地测量系统（Public Land Survey System, PLSS）地块边界。表格数据按照PLSS地块及BLM“序列号（案例）”进行汇总统计。本次提供的地理信息系统（Geographic Information System, GIS）数据由多边形矢量文件构成，其边界要么为PLSS标准一平方英里地块，要么为按“序列号”分组的PLSS地块，以覆盖更大尺度的区域。这些形状文件（shapefiles）包含煤炭、地热能源、矿产原料、采矿权主张、非能源固体矿产、油气，以及作业计划与通知相关信息，可在地理信息系统中用于展示此类BLM土地授权的整体分布与密度特征。本数据集已被应用于SaMiRA矿产资源评估中针对可定位、可租赁及可售卖矿产的分析工作。