Karst
Beginning in the winter of 1990 cave entrances and karst feature locations have been inventoried and their locations recorded. At first these were located on air photographs and then their locations estimated onto USGS quadrangles. Beginning with the 89-94 Ketchikan Pulp Long Term Timber Sale Offering and the Central Prince of Wales Island Timber Sale EIS. During the planning efforts for the Lab Bay Timber Sale EIS an extensive historic and current air photograph interpretation was conducted. These features were marked on air photographs and then to the best of our ability indicated on USGS quad maps that were then digitized by Harza Northwest. Beginning in 1998, GPS was used to locate karst features. The early GPS units had less accuracy than the newer ones today. We also began utilizing LiDAR to help with karst feature recognition. Our ability to locate accurately the karst features and caves found during inventory has improved through the years. Our data recording has transitioned from points on hardcopy USGS quadrangles to the dirital data of this layer. These data was also originally digitized as NAD 27 then later converted to NAD 83. The following is a list of some of the projects that have resulted in karst and cave inventory and resource evaluation. 1989-1994 KPC Long Term Sale, 1993 Eight Fathom TS, 1995 Central Prince of Wales Island TS and EIS, 1996 Heceta Sawfly Salvage TS, 1996 Tuxekan-Naukati TS, 1997 Lab Bay TS, 1998 Chasina TS, 1998 Indian River TS, 1999 Kosciusko TS, 1999 Sea Level TS, 2000 Luck Lake TS, 2000 Rumba Heceta Windthrow Salvage, 2003 Cholmondeley TS, 2003 Licking Creek TS, 2003 Madan TS, 2004 Gravina TS, 2004 El Capitan/North Prince of Wales Road, 2004 Tall Tree & RAWS Timber Sales, 2005 Small Otter TS, 2005 Upper Carroll TS, 2006 Kosciusko TS, 2006 Tuxekan TS, 2007 Scratchings TS, 2008 Indian Creek State TS, 2008 Iyouktug TS, 2009 Logjam TS, 2009 Navy TS, 2011 Naukati TS, 2011 Staney, 2013 Big Thorne TS, 2015 Saddle Lakes TS, 2015 Staney, 2015 Waterfront TS, 2016 Camelback TS, 2017 BuckRush TS, 2017 Kosciusko Vegetation Management Watershed Improvement Project, and the Prince of Wales Landscape Level Analysis Project. There have also been over 100 small timber sales on Prince of Wales Island Districts where karst and cave resource inventories have been conducted.NOTE: This feature class was a complete replacement of the entire extent, made from the latest inventory Jim Baichtal has as of 6/19/2019.JimBaichtal jbaichtal@fs.fed.us
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