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2010-06-17_REVISION - C1994082
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2010-06-17_REVISION - C1994082
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Last modified
8/24/2016 4:13:27 PM
Creation date
6/25/2010 9:15:24 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1994082
IBM Index Class Name
Revision
Doc Date
6/17/2010
Doc Name
Revised Pages (Tab 22)
From
Seneca Coal Company
To
DRMS
Type & Sequence
TR48
Media Type
D
Archive
No
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inside the fenced area. This will be accomplished using the techniques outlined in the <br />revegetation plan which include direct seeding and seedling transplants. In the Musselman <br />research, the highest mortality of live planted seedlings was 45 % where the competing <br />biomass was high. Optimistically, the mortality rate will be approximately 50% so the <br />standard will be 150 stems per acre for seedling transplanted aspen and 850 stems for all <br />woody species. This is a reasonable assumption based on experience with aspen planting at <br />other Seneca mines. We must assume that mortality will increase over time (10 year liability <br />period) even though the use of fabric mats appears to be a very beneficial component for <br />improved success. However, the mats will deteriorate, herbivory of some form is likely, and <br />increased herbaceous competition will occur over time. While the benefits to initial <br />establishment of aspen and woody shrubs are demonstrated by using the procedures outlined in <br />the Musselman report, loss will continue until the aspen and all woody plants have developed a <br />sufficient root system to be competitive even with herbaceous perennials. The 850 total woody <br />stems per acre, within the fenced plots, is a realistic level based on the Musselman, et al, report <br />and the ecological realities of reestablishing woody plants at the Seneca complex. <br />Exhibits 22 -1 and 22 -1A illustrate the general location of the shrub and the tree planting areas. <br />Shrub and tree establishment areas will be delineated and sampled separately from the general <br />reclaimed units. Random or systematically placed density plots, depending on size of unit, will <br />be used in sampling. Plot size will be 100m <br />. <br />The woody plant density of the appropriate revegetated area will be considered acceptable if <br />the density is not less than 90 percent of the approved standard in reclaimed lands and <br />concentrated sites with 90 percent statistical confidence. Density shall be determined by the <br />number of countable tree and shrub stems per unit area. Woody plant densities will be <br />measured in a 1 in x 50m (50mz) or larger direct count quadrat. All quadrats will be randomly <br />located and sampling intensity will be to statistical adequacy or a specified maximum sample <br />size determined in consultation with CDMG. The counted tree or shrub will be alive and <br />healthy and in place at least two growing seasons. When counting stems, consideration will be <br />given to shrubs, which spread by above or below ground runners. <br />A shrub density standard is not proposed for the haul road corridors for the following reasons. <br />The maximum width of the disturbance area is approximately 200 feet, representing a minimal <br />disturbance in relation to the surrounding area. Also, the overstocked and decadent shrub <br />TR48 49 06/10 <br />
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