The four major federal land management agencies—BLM, the Forest Service, FWS, and NPS—manage their land and resources in accordance with their respective missions and authorities. BLM and the Forest Service are responsible for managing about 69 percent of federal land for a variety of uses, including recreation, timber harvesting, livestock grazing, oil and gas production, and mining. FWS is responsible for managing about 14 percent of federal land, primarily to conserve and protect fish and wildlife, and their habitat, although other uses, such as hunting and fishing, are allowed when they are compatible with the primary purposes for which the lands are managed. NPS manages approximately 12 percent of federal land to conserve, preserve, protect, and interpret the nation’s natural, cultural, and historic resources. In comparison, BoR, which manages about 1 percent of federal land, has a much narrower primary mission—to manage, develop, and protect water and related resources in an environmentally and economically sound manner. Accordingly, BoR maintains 348 reservoirs, 476 dams, and 58 hydroelectric plants on federal land and is the largest wholesale supplier of water in the United States and the second-largest hydroelectric power producer in the nation. BoR land is largely managed to meet its primary mission, but this land also provides other benefits, such as recreation. These agencies may collect a variety of data to manage and oversee their activities. For our 2011 report, we examined over 100 data elements that fall into three broad categories: (1) information on federal land and the resources the agencies manage, (2) revenues generated from selected activities on federal land, and (3) information on federal land subject to selected land use designations. We developed this list of data elements by reviewing, among other things, the request letter for the work, past GAO and Congressional Research Service reports, and interviewing agency officials. The five agencies may collect other data related to land management that were not included in this review. The three data element categories are described below. Federal land and resources. We identified 57 data elements in this category that relate to (1) information on the total surface and subsurface acres of federal land managed by each of the five land management agencies and the total acres managed for specific purposes, such as hardrock mining or grazing, and (2) the volume of various resources, such as oil and gas and timber extracted or harvested from federal land. Revenues generated from activities on federal land. We identified 35 data elements in this category that relate to information on revenues generated from activities on federal land, which are derived from the use or sale of land and resources. Sources of revenue include revenues generated from oil and gas activities, hardrock mining, and special use or right-of-way permits issued for transmission lines, filming activities, and concession activities. We also included cost recovery fees—which are intended to recover agency costs for processing certain plans, applications, or permits associated with various activities on federal land—in this category of data elements. Federal land use designations. Data elements in this category relate to information on the number of acres each agency manages that are associated with various special designations of federal land, such as wilderness areas, wild and scenic rivers, paleontological sites, and critical habitat set aside for endangered species. Some of these land use designations apply to all five federal land management agencies, but some are unique to a specific agency, and the number of land use designations applicable to each agency varies. The five agencies varied in the extent to which they collected the over 100 land and resources, revenue, and federal land use designation data elements that we queried them about. Specifically, all five agencies collected only 4 of the same data elements of the over 100 data elements that we asked them about. These 4 elements related to total surface acres managed, total acres managed within each state, the number of special use permits generated for filming activities on federal land, and the number of cultural and historic sites listed on the National Register of Historic Places. In contrast, none of the agencies collected information for 33 data elements that we asked them about, such as the percent of total acres under oil, gas, or coal leases that have surface disturbance or where the surface disturbance has been reclaimed, or information on the potential quantities of oil, gas, and coal resources on federal land. Specifically, of the 57 federal land and resource data elements we asked each of the five agencies about, BLM and the Forest Service collected the most—22 and 20 data elements respectively—and BoR collected the least—3 data elements. Table 1 lists the 57 federal land and resources data elements we asked about and indicates which of the five agencies collected them. Of the 35 revenue data elements we asked each of the five federal agencies about, BLM collected the most and NPS collected the least, 22 and 6, respectively. Table 2 lists the 35 data elements that relate to revenues generated from activities on federal lands and which of the five agencies collected them. Some land use designation data elements that we asked the five federal land management agencies about applied to all five of them, and some were unique to a specific agency. As a result, the number of land use designations applicable to each agency varied. Specifically, 26 federal land use designation data elements applied to BLM, 21 to the Forest Service, 21 to FWS, 30 to NPS, and 17 to BoR. NPS collected the most information on federal land use designation data elements and BoR collected the least, 25 and 1, respectively. Table 3 lists the data elements collected for federal land use designations by those that apply to all agencies and those that apply to each of the five agencies. Agency officials cited various reasons why their agencies did not collect certain information, such as they believed another federal agency collected it, it was inconsistent with the agency’s mission, or they lacked the authority or resources to do so. For example, according to BLM officials, the agency does not collect information on the total acres of land designated as Globally Important Bird Areas. The American Bird Conservancy designates these areas and, along with the National Audubon Society, collects information about these sites. BLM is informed if any designations are on its land but does not track these areas. Similarly, according to FWS officials, the United Nations World Heritage program keeps records for acres designated as World Heritage Sites, and FWS relies on this entity for information about these sites. In addition, some agencies did not collect data because they believe collecting it would be inconsistent with the agency’s mission. For example, according to NPS officials, with regard to data related to various aspects of coal, oil and gas, and hardrock operations on NPS land, these activities, if they are allowed at all, are quite limited on NPS land because they are inconsistent with the mission of the agency. For this reason, NPS does not collect information on the potential amounts of these resources on NPS land. These officials also told us that for any quantities of oil and gas extracted from NPS land, the Department of the Interior’s Office of Natural Resources Revenue would collect this information. In addition, BoR did not collect 54 of the 57 federal land and resource data elements we examined because, according to agency officials, these data did not relate to BoR’s mission. The officials noted that while BoR manages land associated with its mission, other activities do occur on its land that are incidental to its mission and are generally managed by another agency. For example, Lake Mead in Nevada and Arizona is a National Recreation Area located on BoR land and managed by NPS. Thus, NPS would collect data on the number of acres acquired for national recreation areas, such as Lake Mead, and not BoR. Further, some agencies cited a lack of authority or resources to collect certain data elements as their reason for not doing so. For example, according to agency officials, the Forest Service does not collect information on surface land disturbed by coal mining because it is not within Forest Service authority to require collection of this information. Forest Service officials said Interior’s Office of Surface Mining, Reclamation and Enforcement may collect this information. They added that it is not within the scope of the Forest Service’s authority to require the collection of information on surfaces disturbed by oil and gas activities, but they thought that BLM might collect this information. BLM officials stated that they would like to collect this information, but funding is not available to do so. When information was collected by the five agencies, it was more often stored in a primary agency data system—a centralized electronic data system maintained at an agencywide level—than in other formats. Specifically, approximately three-quarters of the data elements that the agencies collected were stored in a primary agency data system. For example, we queried each agency about 57 federal land and resources data elements, and while the number of data elements each agency collected varied significantly, ranging from 3 to 22, the majority of the information that was collected was stored in a primary agency data system. BLM collected 22 federal land and resource data elements, and 15 of these elements were stored in a primary agency data system. These included data elements related to the total acres that have been leased for coal development, total acres that have been leased for oil and gas development, and total acres for livestock grazing. However other data, such as acres of surface and subsurface land, acres managed within each state, and potential quantity of coal reserves on leased land that the agency manages, were kept in BLM state offices in other formats, such as electronic spreadsheets or hard copy. In contrast, all the data elements the Forest Service, FWS, and BoR collected were available in a primary agency data system. Similarly, we asked each agency about 35 specific revenue data elements, and again while the number of data elements each agency collected varied significantly, ranging from 6 to 22, the majority of the information that was collected was stored in a primary agency data system.