docappendix 3 - Mount Owen Complex
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appendix 3 - Mount Owen Complex
Previous Next Home appendix 3 Soil Profile Descriptions Previous Next Home Hunter Valley Coal Corporation Mt Owen Operations Soil Profile Descriptions December 2003 Environmental Impact Statement Mt Owen Operations Previous Next Home Appendix 3 Soil Profile Descriptions Soil Profile Descriptions Mt Owen Project Area Each of the major soil profile types is described in detail below, based on soil survey conducted between 29 January 2003 and 4 February 2003. MT OWEN SOIL PROFILE 8 Yellow Podzolic, Dy3.22 This profile occurs on the midslope of a cleared hillside bordering Bettys Creek. Ground cover was approximately 95% and consisted of improved pasture. Slope approximately 3%. Underlying bedrock is sedimentary, probably lithic sandstone. Slow internal drainage. No erosion present. Moderate soil erodibility, low erosion hazard, no salting evident. Topsoil A1: 0 – 5 cm, 7.5YR4/2, pH 6.0. Loam, fine sandy, normal plastic, slightly sticky. Weak consistence, crumbly shear. Weak pedality, 5 – 10 cm, sub-angular blocky, rough-faced peds, breaking to 2 – 5 cm round secondary peds. Cracks 2 – 5 mm. Less than 2% stones (rounded to sub-angular, dispersed, 2 – 6 mm, weakly weathered, ironstone and jasper). Many roots, mainly in-ped. No pans or concretions. Clear wavy boundary. A2: 5 – 15 cm, 7.5YR4/2, pH 6.0. Sandy clay loam, normal plastic, slightly sticky. Strong consistence, brittle shear. Strong pedality, 10 – 20 cm subangular blocky, rough-faced peds, breaking to 5 – 10 cm columnar secondary peds. Cracks 2 – 5 mm. Up to 10% stones, especially towards base of A2, (rounded to subangular, dispersed and concentrated at the base, 2 – 60 mm, weakly weathered, metamorphic, igneous, petrified wood, ironstone and jasper). Common roots, mainly in-ped. No pans or concretions. Clear wavy boundary. Subsoil B: 15 – 65+ cm, 7.5YR5/4, pH 7.0. Medium clay, mottled, (with 30% dark red mottles and 10% pale orange mottles). Strong consistence, labile shear when moist. Moderate pedality, 10 – 20 cm columnar rough-faced peds. Cracks 2 – 5 mm. Up to 10% stones (rounded to sub-angular, dispersed, 2 – 60 mm, weakly weathered, metamorphic, igneous, ironstone). Few roots, mainly in-ped. No pans or concretions. MOUNT OWEN SOIL PROFILE 5 Grey-brown Podzolic, Db2.21 This profile occurs on the upper slope of a partially cleared hillcrest. The ground cover consisted of grasses and was 70%. Slope 1 to 2%. Underlying bedrock is sedimentary, probably lithic sandstone. Slow internal drainage. No erosion present. Moderate soil erodibility, low erosion hazard, no salting evident. Topsoil A1: 0 – 9 cm, 7.5YR3/2, pH 6.0. Loam, normal plastic, non-sticky. Weak consistence, crumbly shear. Weak pedality, 5 – 10 cm polyhedral rough-faced peds, breaking to 1 – 2 cm secondary peds. Cracks 2 – 5 mm. Less than 2% stones (sub-angular, dispersed, 2 – 6 mm, weakly weathered ironstone). Common roots, mainly in-ped. No pans or concretions. 1614/R02/A3 Umwelt (Australia) Pty Limited December 2003 1 Environmental Impact Statement Mt Owen Operations Previous Next Home Appendix 3 Soil Profile Descriptions A2: 9 – 25 cm, 7.5YR5/2, pH 6.5. Sandy clay loam, normal plastic, slightly sticky. Strong consistence, brittle shear. Strong pedality, 10 – 20 cm sub-angular blocky rough-faced peds, breaking to 5 – 10 cm secondary peds. Cracks 2 – 5 mm. Less than 2% stones (sub-rounded, dispersed, 2 – 60 mm, weakly and strongly weathered sedimentary and unidentified rock types). Few roots, mainly in-ped. No pans or concretions. B: 25 – 65 cm, 7.5YR4/3, pH 5.5. Medium clay. Strong consistence. Moderate pedality, 5 - 10 cm subangular blocky rough-faced peds. Cracks 2 – 5 mm. Less than 2% stones (sub-angular, dispersed, 20 – 60 mm, weakly and strongly weathered unidentified rock types). Few roots, mainly in-ped. No pans or concretions. MOUNT OWEN SOIL PROFILE 2 Rough-ped Gradational Soil, Gn1.84 This profile occurs on the alluvial flat bordering Bettys Creek. The ground cover consisted of improved pasture and was 95%. Slope approximately 1-2%. Slow internal drainage. No erosion present. Moderate soil erodibility, low erosion hazard, no salting evident. Topsoil A1: 0 – 40 cm, 10YR3/2, pH 6.0, approximately 10% pale orange mottles. Clay loam, normal plastic, slightly sticky. Strong consistence. Strong pedality, 10 – 20 cm, sub-angular blocky, rough-faced peds, breaking to 5 – 10 cm sub-angular blocky secondary peds. Cracks 2 – 5 mm. No stones. Many roots, mainly ex-ped. No pans or concretions. Gradational boundary. A2: 40 – 100 cm, 10YR5/3, pH 6.5, approximately 10% pale orange mottles. Light medium clay, normal plastic, moderately sticky. Very strong consistence. Strong pedality, 20 – 50 cm, sub-angular blocky, roughfaced peds, breaking to 5 – 10 cm sub-angular blocky secondary peds. Cracks 2 – 5 mm. Less than 2% stones (sub-rounded, dispersed, 6 – 60 mm, weakly weathered, not identified). Few roots. No pans or concretions. Gradual boundary. Subsoil B: >100 cm, 7.5YR6/3, pH 6.0, approximately 40% dark orange mottles. Sandy clay, very strong consistence. Weak pedality, sandy fabric. Between 2 and 10% stones (rounded to sub-rounded, dispersed, 6 – 60 mm, weakly to strongly weathered, sedimentary, igneous and metamorphic rock types). No roots, no pans or concretions. 1614/R02/A3 Umwelt (Australia) Pty Limited December 2003 2
