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Table 1 Area (in thousand hectares) and percent (in parentheses) of forest area by owner group in each pre-fire stand size and age class within the six 2020 Labor Day fires. Percentages are for each owner and structure combination totaled by column within class type

From: Inventory analysis of fire effects wrought by wind-driven megafires in relation to weather and pre-fire forest structure in the western Cascades

Forest structure

NFS

BLM

State

Private

All

Size class (cm)a

  < 25

20 (18%)

4 (11%)

4 (36%)

44 (45%)

 72 (28%)

 25–53

51 (46%)

15 (41%)

2 (17%)

53 (53%)

 121 (47%)

  > 53

40 (36%)

18 (48%)

5 (47%)

2 (2%)

 65 (25%)

Age class (years)

 0–20

6 (5%)

0 (0%)

3 (27%)

37 (29%)

46 (15%)

 21–60

37 (32%)

17 (40%)

3 (27%)

83 (64%)

140 (47%)

 61–120

34 (30%)

12 (28%)

3 (27%)

3 (2%)

52 (18%)

 121–150

7 (6%)

8 (19%)

2 (18%)

0 (0%)

17 (6%)

  > 150

30 (26%)

6 (14%)

0 (0%)

0 (0%)

36 (12%)

All age classes

114

43

11

129

297

  1. aStand size classes: < 25 cm (< 10 in), 25–53 cm (10–20 in), and > 53 cm (> 20 in) diameter