This layer shows new stand delineations for young growth as prepared by Terra Verde Inc. under the Combined Cost Share Agreement (CCSA) and delivered to the USFS in September 2020. This is the working layer developed from that work and includes an updated birth year attribute for stands that were coded "0" in the CCSA delivery. This layer includes only young growth stands. Old growth and non-forest stands are not included.

This young growth timber type map layer shows each individual young-growth stand on the Tongass, lists its acreage and describes its structure by specifying (1) species composition (i.e., dominant species), (2) tree size (i.e., overstory height), and (3) stocking (i.e., per cent crown closure) in one spatially integrated attribute (timber type code). The year the stand is expected to reach the "2-log" condition (an estimation of commercial merchantability) is also attributed along with basin, year of origin, age class 5 and 10 and site grid attributes needed to support the FPS growth and yield model. .