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GENERAL32470
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Last modified
8/24/2016 7:55:00 PM
Creation date
11/23/2007 7:19:25 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982055
IBM Index Class Name
General Documents
Doc Date
9/15/1994
Doc Name
TOPSOIL SUBSTITUTE SUITABILITY REPORT RATON CREEK MINES
Permit Index Doc Type
SOILS
Media Type
D
Archive
No
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• <br />~~~° of precipitation and are considered suitable as a seedbed material with respect to coarse fragment <br />content. The weighted average coarse fragment content of sample point RC-9 is 37.3 percent, falling into <br />~~~ TABLE 6 <br />COARSE FRAGMENT CONTENT CALCULATIONS-JULY, 1994 SAMPLING PROGRAM <br />L%? <br />WHC (in.) WHC (in.) WHC (in.) Coarse Fragment Content <br />Sample Point 0-24" 24-48" Total Weighted Ave. (0-48") <br />RC-1 3.60 3.70 7.30 Not applicable <br />-~ RC-2 4.05 3.80 7.85 Not applicable <br />T~ <br />~~'.~ RC-3 2.95 3.25 6.20 30.0% <br />RC-4 2.93 2.90 5.83 32.5% <br />~: <br />RC-5 1.93 1.33 3.26 58.2% <br />ks> <br />- RC-6 2.86 0.85 3.71 56.3% <br />o~ RC-7 1.83 2.05 3.88 58.8% <br />._:j <br />RC-8 2.38 1.94 4.32 55.7% <br />RC-9 2.70 2.85 5.55 37.3% <br />RC-10 3.36 2.80 6.16 28.1 <br />~ Notes: WHC =Water Holding Capacity; Not Applicable =all sample depth increments exhibit "acceptable" <br />pp~~° or °marginal" coarse fragment content values. All WHC values adjusted for coarse fragment content. <br />Fs <br />the lower range of the unsuitability classification. Considering the water holding capacity, however, it can <br />s <br />f be noted that this profile is capable of storing over two and one-halt times the average maximum monthly <br />precipitation incident to the site. This material is also considered to be acceptable as a topsoil substitute in <br />light of these calculations. <br />1 <br />~ Sample points RC-5 through RC-8 exhibit high coarse fragment contents throughout a major portion, <br />~~ or the entirety, of their profiles. The coarse fragment content of all depth increments for sample points <br />RC-5 and RC-7 were classed as unsuitable and ranged from 45 to 65 percent and from 45 to 75 percent, <br />respectively. Sample point RC -8, while having a marginal coarse fragment content of 35 percent in the 0 <br />to 6 inch depth increment, exhibited a content classed as unsuitable ranging from 45 to 70 percent <br />yi throughout the remainder of the profile. Acceptable contents of 5 and 25 percent were found to a depth <br />~~ <br />of 18 inches for sample point RC-6. Conversely, unsuitable percentages ranging from 55 to 95 percent <br />(y were noted from 18 to 48 inches. (The lower depths of this profile consisted of what appeared to be <br />y~ 'subsoil" (Cr), which accounts for the high coarse fragment contents noted.) The weighted average <br />(p'a! coarse fragment content of these four profiles ranged from 55.7 to 58.8 percent with WHC values for the <br />F•:if total profile depths ranging from 3.26 to 4.32 inches. Calculated WHC values for the shallower soils <br />(sample points A-1 through A-3) previously mapped on site (Neve 1983) ranged from 1.76 to 2.72 inches. <br />i1 <br />
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