Thirty-eight figures that appeared in the Bureau of Mines special publication "availability of land for mineral exploration and development in western Alaska, 1986," have been open-filed at the 1:250,000-scale size in the Anchorage, Fairbanks, and Juneau offices of the Bureau's Alaska Field Operations Center. These overlays show the availability of land within each quadrangle for mineral exploration and development as of July 1, 1986. As many as 15 land subclassifications may be depicted on each quadrangle, showing open land, land open with restrictions, private lands, and land closed to mining. The mineral deposits plotted on the overlays are based on the Bureau's minerals availability system (mas). An adjoining table is keyed to the deposit numbers. The deposit numbers identify one or more mineral deposits within a 3-mile radius. The table shows the mas sequence number (an identification number related to a Bureau file), major commodities associated with the deposit, and an indicator of past production.