APPCOR10133

• Permit No: C1981026
• IBM Index Class Name: Application Correspondence
• Doc Date: 7/28/1981
• Doc Name: ADDENDUM I - RESPONSE TO PRELIMINARY ADEQUACY REVIEW COMMENTS
• Media Type: D
• Archive: No

Figure 3 illustrates all the areas involved in the above
discussion. The unnamed alluvium (Soil Unit 8) has been
drawn in its exact configuration as previously shown on
the soil map in Appendix E. The bank to bank configuration
of the active stream channel through this alluvial soil is
shown. Eight sections across the channel in the vicinity
of proposed physical disturbance are also shown. Finally,
the regions of apparent natural subirrigation adjacent to
the active channel have been delineated based on the
presence of plant species such as willows and wild iris.
Features such as soil mottling were also used to help map
these regions. The actual stream channel itself is con-
sidered to be subirrigated north of the M&T access road as
evidenced by five groups of willows growing in the bottom
of the channel (See Figure 3). Also, Figure 3 has
been prepared as an overlay on the Mining and Reclamation
Plan (Figure 2 from the April 14, 1981 application) for
ease in relating the regions mapped to the actual areas
affected by mining.
After planimetering all above referenced areas, the
following acreages were delineated for each region:
1) Total acreage of soil unit 8 north of M&T access
road = 14.43 acres.
Total acreage of soil unit 8 affected by either over-
burden removal, topsoil storage or sedimentation
pond 4 (mining activities) = 6.00 acres.
2) Total acreage of active stream channel north of M&T
access road and generally within soil unit 8 =
1.06 acres.
Total acreage of active stream channel affected by
mining activies = 0.38 acres.
3) Total acreage of probable subirrigated alluvial region
(inclu ding active stream channel) north of M&T a ccess
road = 5.40 acres.
Total acreage of probable subirri ated a uvial region
affected by mining activities = 0.67 acres
The significant factor to note in this acreage analysis
is that although 14.43 acres of alluvial soil exist north
of the M&T access road, only 5.40 acres within and
adjacent to the stream channel is subirrigated (based on
plant species and soil mottling). Furthermore, of the
5.40 total acres that are potentially subirrigated only
0.67 acres or about l2$ of the area falls within the region
of overburden removal, topsoil stockpiling or sedimentation
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