Forest Inventory

Forest Inventory

Inventory

Forest inventory is an estimate of the number, size, and species of trees on both HRC and MRC forestlands as well as forest habitat condition, and acreage of high conservation value areas. Inventory foresters collect the following information:

  • Tree diameters
  • Tree heights
  • Unique tree characteristics (e.g. old growth, snags, nests)
  • Number and size of downed logs

Table 1. Total inventory of trees and harvest level on HRC forestlands at the end of the calendar year.

Year Harvest (million board feet)   Estimated inventory (million board feet)
Acquisition NA   3,979
2008 2.81   4,001
2009 25.2   4,079
2010 52.8   4,217
2011 54.9   4,270
2012 59.9   4,331
2013 59.1   4,403
2014 53.6   4,444
2015 59.4   4,599
2016 43.5   4,623
2017 57.7   4,705
2018 62.7   4,790
2019 65.4   4,870
2020 54.8   4,950
2021 41.9   4,719
2022 60.6   4,954
2023 67.7   4,995

1 For 2008 the harvest volume is for the months lands were owned by HRC only.

 

Table 2. Total inventory of trees and harvest level on MRC forestlands at the end of the calendar year.

Year Harvest (million board feet) Estimated inventory (million board feet)
Acquisition NA 2,143
1998 35.8 2,192
1999 38.9 2,240
2000 36.8 2,292
2001 31.6 2,351
2002 26.1 2,417
2003 28.9 2,485
2004 30.5 2,553
2005 33.1 2,608
2006 37.1 2,676
2007 36.0 2,727
2008 38.4 2,815
2009 13.4 2,910
2010 39.5 2,978
2011 30.6 3,021
2012 51.1 3,187
2013 37.6 3,291
2014 32.6 3,402
2015 29.4 3,495
2016 32.2 3,595
2017 33.7 3,698
2018 25.9 3,808
2019 40.9 3,922
2020* 37.6 3,932
2021** 16.2 4,310
2022 44.5 4,406
2023 40.8 4,504

* The reported volumes for MRC 2020 and HRC 2021 reflect the adoption of a completely new inventory in those years and do not imply a rate of growth when compared to prior years.

** The reported volume on MRC from 2020 to 2021 increased significantly more than the volume added via growth and acquisition due to a growth model update correcting issues with short-log scaling rules.

High Conservation Value Areas

High conservation value areas are areas with unique qualities or which provide habitat for sensitive species. More information on these areas can be found in the document, High Conservation Value Forest Assessment in the Management Plans section of this website.

Table 3. Acreages of high conservation value areas on MRC/HRC forestlands

HCV # HCVF Type  HCVF Acres 
1.2  Class 1 and 2 stream side zones 16,381
1.2 Northern spotted owl protected areas  17,596
1.2 Pygmy forest 159
1.2 Oak woodland 1,101
1.2 Marbled murrelet habitat 3,992
1.2 Point Arena mountain beaver 246
2.1 Long Ridge 203
3.1 Type 1 and 2 old growth 3,794
3.3 Salt marsh 66
4.1 Community water source 23
                                                       TOTAL 43,561