This dataset depicts Late-Successional Reserves associated with known
(as of January 1, 1994) spotted owl activity centers in Matrix and
Adaptive Management Areas. The criteria for mapping these areas are
identified on pages C-10 and C-11 of the Northwest Forest Plan Standards
and Guidelines (See supplemental Info.). Supplemental direction to the
administrative units in BLM IM OR-2003-001 directed the designation of
the 100-acre areas by delineating the stand of trees containing the
center of activity as identified in the Spotted Owl Database and
additional Habitat 1 or 2 in the vicinity until approximately 100 acres
were delineated. If there was insufficient Habitat 1 or 2 to meet the
acreage target, then the next best quality habitat was delineated;
selecting from stands that exceed 50 years of age. With some exceptions,
habitat acres were selected within 3/8-mile of the activity center. If
100 acres were not available within this distance, then only that
habitat that was available within the 3/8-mile was delineated. The
center of activity did not need to be located in the geometric center of
the delineated area. Landscape features such as roads, ridge tops, and
streams were used to define the boundaries of the 100-acre areas. Known
Owl Activity Centers that included any General Forest Management Areas,
Connectivity/Diversity Blocks, and/or Adaptive Management Areas were
mapped completely, even if they partially included an area in an LSR,
Congressionally Reserved, and/or AMR. Centers which were totally
encompassed within LUA theme categories Congressional Reserved, LSRs,
and/or AMR were not delineated for this theme.