Mendocino Humboldt Redwood Company, LLC
Monitoring

Forest 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

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

High conservation value areas are areas with unique qualities or which provide habitat for sensitive species. These areas are mapped by region for both HRC and MRC in the maps section.

Table 3. Acreages of high conservation value areas on MRC forestlands, 2016.

Area type Acreage Description
Type 1 old growth 101 Unharvested old growth stands, generally larger than 3 acres.
Type 2 old growth 528 Previously harvested old growth stands at least 3 acres in size.
Pygmy forest 168 Forests of generally dwarfed conifers which exist near the Pacific coastline containing many rare plants.
Oak woodland 1,101 Forests of true oaks and Douglas-fir, interspersed with grasslands.
Coho core areas in Class I WLPZ 3,320 Watercourse buffers for large fish-bearing streams and rivers – specifically valuable for Coho salmon
Coho core areas in Large Class II WLPZ 1,280 Watercourse buffers for streams carrying non-fish aquatic life – specifically valuable for Coho salmon
Northern spotted owl core areas 7,309 Protective buffers for northern spotted owl activity centers.
Marbled murrelet zone in Lower Alder Creek 1,270 Area managed specifically for retention of current murrelets as well as acceleration of growth of habitat in adjacent areas.
Point Arena mountain beaver areas 246 Areas contain burrow systems identified by our forest science staff.
Salt marsh 67 Found along the margins of bays, lagoons, and estuaries. Varies from seawater to brackish water, seasonally flooded.

Table 4. Acreages of high conservation value areas on HRC forestlands, 2016.

Area type Acreage Description
Marbled Murrelet Conservation Areas (MMCAs) 6,630 Areas set aside for the protection of old growth redwood stands occupied by marbled murrelets; second-growth or residual old growth stands are included as buffers and as areas to be managed for accelerated transition to 0ld-growth-like conditions.
Type 1 old growth 208 Unharvested old growth stands, generally larger than 3 acres, outside the MMCAs.
Type 2 old growth 334 Previously harvested old growth stands at least 20 acres in size, outside the MMCAs.
Class I RMZ 14,931 Watercourse buffers for large fish-bearing streams and rivers.
Class II RMZ 20,899 Watercourse buffers for streams carrying non-fish aquatic life.
Long Ridge Douglas-fir HCV 203 Stand containing Type I and II old growth as well as the older component of Douglas-fir forest in the Mattole watershed