2017-02-03_PERMIT FILE - C1980004 ‎(2)‎

• Permit No: C1980004
• IBM Index Class Name: Permit File
• Doc Date: 2/3/2017
• Section_Exhibit Name: Volume I Sections 2.03 & 2.04
• Media Type: D
• Archive: No

2.04.10 Vegetation Information
REFERENCE AREA SELECTION
Reference areas were established for each vegetation type affected by
disturbance. Reference areas were selected following the completion and analysis of
cover data for the affected vegetation types. This procedure permitted the integration of
cover data into the reference area and selection process. Factors considered in the
location and selection of representative reference sites included similarity of vegetation
and habitat of the reference area compared to the affected area. Important vegetation
factors evaluated were structure, composition, species dominance as expressed by
cover, production, and density. Prominent abiotic habitat factors included soil type,
topography, slope, and aspect.
Following collection and analysis of data the comparability of reference areas
and analogous affected areas was evaluated statistically for cover and production with
the formula
=Nil
S2.�t N 2
where X1 = Mean cover or production for the affected area
X2 = Mean cover or production for the reference area
t = a t- statistic value, which varies depending on desired level of
confidence and sampling size
s12 = the variance of cover or production for the affected area
s22 = the variance of cover or production for the reference area
nj = sample size in the affected area
n2= sample size in the reference area
When Ix, x21 is less than or equal to the other calculated value, the affected area
and reference area are considered comparable for the purpose of evaluating
reclamation success.
REFERENCE AREA SAMPLING DESIGN
All sample sites were located by a random process. The southwestern corner of
each reference area served as the intersection with an x and y coordinate system.
PR -02 2.04-52 10/12