In short, the old section number is no longer the official identification number for that particular piece of land until the section is completely surveyed and accepted by the BLM. Why can’t I just continue to use the old section number? Only fully surveyed sections or completely unsurveyed sections will maintain the section numbers. Until all users are aware of this change there may be confusion in communicating location based on the protraction block numbering.įorest Visitor Maps and new SEQs (Single Edition Quads, or 7.5-minute topographical maps) now use the PB system. Map users should be aware of this difference in Section numbering from the standard 1-36. The lowest protracted block number will be PB37 and it will be sequentially numbered, identifying each parcel that abuts a previously surveyed area. In 1993, the BLM issued a manual that allows for the definition of unsurveyed areas in the lower 48 states and provides a stabilized protracted land net which helps to simplify the issuing of leases and identifying withdrawals on unsurveyed Federal Lands.Ī protracted block is identified by its unique numbering system. The Bureau of Land Management is responsible for the PLSS. Some background: The Public Land Survey System (PLSS) is the method by which public land in the United States is identified, established, and described. These ‘PBs’ will be found most often in areas with complete or partial section surveys, such as in mining districts, areas with private inholdings or along Federal land boundaries. That PB stands for ' Protracted Block', which is an unsurveyed area (of uncertain acreage) of which parts of, but not the entire, boundary has been surveyed. Why is there a "section" labeled PB43 on my map where I expected a section number?
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