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+ Table 1. Soil Chemical and Physical Characteristics of Old Nolf Creek Regraded Spoils, ,
<br />Seneca Mine, Routt County, Colorado, July 1983. ^'
<br />Sample Description of Spoils pH EC SAR
<br />mmhos/an Sat
<br />X Sand
<br />% Silt
<br />z Llay
<br />x ABP
<br />2 ,A1
<br />ppm Fe
<br />ppm Mn
<br />ppm N
<br />PPm P
<br />PPm K ..
<br />ppm
<br />63083-1 LGR Sandstone, UM 4.6 5.0 0.3 52.1 49 38 13 2.4 < 1.0 255 66.0 7 ~ 0.9 62.2
<br />63083-2 LGR Sandstone, UM 2.7 11.3 < 0.1 38.4 61 34 5 -10.5 95.6 665 30.4 5 55.6 11.1
<br />63083-4+ OGR Shale 3.9 2.9 0.1 52.1 26 47 27 -5.2 16.4 354 13.2 7 48.7 134
<br />92882-1* DGR Shale 2.7 5.0 0.2 40.9 22 45 33 -16.0 22.7 334 35.7 <3 106 80.1
<br />63083-12 DGR Shale 3.5 3.5 0.1 51.2 30 45 25 -4.6 13.8 375 22.8 6 55.4 81.8
<br />63083-3* LYBR Sandstone 6.5 0.8 0.2 52.7 25 44 31 -1.0 1.0 135 32.5 3 20.1 117
<br />63083-13** LYBR Sandstone 5.7 3.8' 0.5 51.2 29 46 25 -0.2 3.1 170 43.1 4 37.6 109
<br />92882-2* LYBR Sandstone 6.3 3.1 0.2 42.7 27 41 32 13.6 -- -- -- <3 33.8 271
<br />" 63083-5+ LYBR Sandstone 7.0 0.7 0.1 50.4 25 ~ 46 29 3.1 <1.0 78.3 25.9 4 21.4 140
<br />63083-6* LYBR Sandstone 6.5 2.6 0.1 47.6 28 46 26 -0.7 <1.0 122 29.1 4 18.6 90.0 •
<br />63083-7+ LYBR Sandstone 7.3 1.3 0.1 52.1 24 45 31 4.7 <1.0 74.9 29.7 3 10.4 106
<br />63083-10 DBRL Topsoil 1.1 0.7 0.1 ~ 52.2 31 41 28 -- -- -- -- 3 24.3 289
<br />63083-11 DBRL Topsail 6.3 1.7 0.1 46.9 32 48 20~ -- -- -- -- 5 38.3 238
<br />1 LGR - Light Grey, DGR - Dark Grey, LYBR - Light Yellowish Brown, DBRL - Dark Brown Loam, UW - Unweathered
<br />2 Tons calcium carbonate required per 1,000 tons of spoi l.
<br />• • ComPosit of 10 subsamples
<br />+* Composit of 4 subsamples
<br />
<br /> FIELD SAMPLING NOTES:
<br /> 63083-1 Grey fine to very fine sandstone which oxidizes to red, orange, and yellow surficial colors
<br />~ 63083-2 Grey fine to very fine sandstone with numerous black hairline organic streaks. Rock weathers (oxidizes) to a light green surface color.
<br /> 63083-3 Mixed spoil, matrix is predominantly light yellowish brawn sandstone; vegetation consists of orchard grass, sheep fescue, Canada bluegrass,
<br /> regar brume, vnooth brume, titer milkvetch, and alfalfa.
<br />~ 63083-4 Spoil matrix is predominantly dark gray to black shale, light green fine sandstone rocks and "wet spots° are present. No established
<br /> .
<br />revegetation.
<br /> 63083-5 Same characteristics as sample 63083-3 except spoil seems more alkaline due to establishment of more wheatgrasses, sage, and alfalfa.
<br /> 63083-6 Same characteristics as sample 63083-3.
<br /> 63083-7 Same characteristics as sample 63083-3 except mare alfalfa seedlings are present.
<br /> 63063-10 Collected from soil pit, upper half of topsoil, 0-3 Inches, dark brown loam, many roots, predominantly cheatgrass with same slender wheatgrass,
<br /> foxtail barley, smooth brume, Canada bluegrass, and orchardgrass.
<br /> 63083-11 Collected from soil pit, lower half of topsoil, 3-6 inches, dark brown loam, many roots, roots stop at topsail-spoil Interface.
<br /> 63083-12 Collected from soil pit, spoil matrix 1s predominantly dark gray to black shale, 'wet spots' are present in surrounding area, no roots are
<br /> present in this medium.
<br />f 63083-13 Collected from four soil pits, light yellowish brown sandstone, roots from orchardgrass, smooth brume and slender wheatgrass are selectively
<br /> traversing in this material rather than the surround dark grey to black shale medium.
<br /> 92882-1 Spoil matrix is predominantly dark grey to black shale, °wet spats" are present, no established vegetation.
<br /> 92882-2 Mixed sPOil, matrix is predominantly light yellowish brown sandstone, vegetation is similar to site 63083-3.
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