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Five acres or less of surface disturbance usually requires a notice. The notice must describe the proposed activities, the location on the ground, the start-update, road access and construction, if any, and reclamation measures. Receipt and review of a notice is not a Federal action; there- fore, there is no requirement for the preparation of an EA or EIS. Approval by BLM is not required for a notice. There is no requirement for notifying the BLM of casual use activities. Casual use activities are those that cause oNy negligible disturbance of the public lands and resources, For example, activities that do not involve the use of earth- moving equipment of explosives may be consid- eredcasual use. Exploration and mining activities in BLM wildemess study areas (WSA's) are subject to regulations in 43 CFR 3802. The BLM Interim Management Policy and Guidelines for Lands Under Wilderness Review (BLM Handbook 8550-1; November 10, 1987) also gives ntles concerning mineral activities in WSA's. The rules require a plan of operations for all activities other than what could be considered casual use (see 43 CFR 3802.1-2). Reclamation is a re- quirementforall surface-disturbing activities in WSA's. Where required, reclamation must be completed to the point that mining activities are substantially unnoticeable by the 6me the Secre- tary of the Interior makes rewmmendations for wildemess designation to the President. There- fore, each BLM State Director has set a date for completion of reclamation in WSA's in that State. All recommendations of the Secretary of the Interior to the President on BLM-adminis- tered lands are to be made on or before October 20, 1991. However, not all States are involved in the wIldemess study program. with the longer side lines parallel to the vein or lode (see Figure 1). Descriptions are by metes and bounds surveys (giving length and direction of each boundary line). Federal statute limits their size to a maximum of 1,500 feet in length along the vein or lode. Their width is a maxi- mum of 600 feet, 300 feet on either side of the centerline of the vein or lode. The end lines of the lode claim must be parallel to qualify for underground extralateral rights. Extralateral rights involve the rights to minerals that extend at depth beyond the vertical boundaries of the claim. Placer Claims: Mineral deposits subject to placer claims include all those deposits not subject to lode claims. Originally, these included only deposits of unconsolidated materials, such as sand and gravel, containing free gold or other minerals. By Congressional acts and judicial interpretations, many nonmetallic bedded or layered deposits, such as gypsum and high calcium limestone, are also considered placer deposits. Placer claims, where practicable, are located by legal subdivision (for example: the E 1/2 NE 1/4 NE 1/4, Section 2, Township 10 South, Range 21 East, Mount Diablo Meridian). 'i7te maximum size of a placer claim is 20 acres per locator (see Figure 2). An association of two locators may locate 40 acres, and three may locate 60 acres, etc. The maximum area of an association placer claim is 160 acres for eight or more persons. However, the maximum size of an association placer claim in Alaska is limited to 40 acres under State law. The maximum size of a placer claim for cotpora- tions is 20 acres per claim. Corporations may not locate association placer claims unless they are in association with other private individuals or other corporations as co-locators. 24 9