Mid-Atlantic Power Pathway Chalk Point Substation to Indian River ...

Mid-Atlantic Power Pathway Environmental Review Document
Chalk Point Substation to Indian River Substation Volume II – Environmental Analysis of
April 13, 2011 Chalk Point Substation to MD/DE State Line
Table 1.2-1 (continued)
Soil Series Within the Project Right-of-Way and Project Boundaries
Soil Series Description
Howell The Howell series consists of deep well drained soils on uplands. They formed in
Coastal Plain sediments. Typically, these soils have a dark yellowish-brown fine sandy
loam surface layer 8 inches thick. The subsoil from 8 to 14 inches is strong brown sandy
clay loam, from 14 to 24 inches is strong brown clay loam, from 24 to 37 inches is
mottled strong brown clay, and from 37 to 46 inches is mottled pale olive clay. The
substratum from 46 to 60 inches is pale olive clay. Depth to a root restrictive layer is
greater than 60 inches. The natural drainage class is well drained. Water movement in
the most restrictive layer is moderately high. Available water to a depth of 60 inches is
high. Shrink-swell potential is moderate. This soil is not flooded. It is not ponded. A
seasonal zone of water saturation is at 48 inches during January, February, March, April,
May, November, and December. Organic matter content in the surface horizon is about
2 percent. This soil does not meet hydric criteria.
Hurlock The Hurlock series consists of very deep poorly drained soils formed in alluvial or
marine sediments of the Atlantic Coastal Plain. They are on low-lying uplands and
broad depressions. Typically the surface layer is black sandy loam 3 inches thick. The
subsurface layer is gray sandy loam 7 inches thick. The subsoil from 10 to 25 inches is
gray sandy loam and light brownish gray loamy sand. The substratum from 25 to 60
inches is light gray sand and gray loamy sand. From 60 to 66 inches, it is stratified silt
loam and very fine sandy loam. This soil is poorly drained. The slowest permeability
within 60 inches is very slow. The slowest permeability within 60 inches for the
‘Hurlock, drained’ and ‘Hurlock, undrained’ components is moderate. Available water
capacity is very high and shrink swell potential is low. This soil is not flooded and is not
ponded. The ‘Hurlock, drained’ component is rarely ponded, and the ‘Hurlock,
undrained’ component is occasionally ponded. The top of the seasonal high water table
is at 6 inches (Hurlock), 5 inches (Hurlock, undrained), or 14 inches (Hurlock, drained).
There are no saline horizons. This component is a hydric soil.
Indiantown The Indiantown series consists of very deep very poorly drained soils on nearly level
flood plains of the Mid-Atlantic Coastal Plain. They formed in loamy fluvial sediments
overlying sandy alluvial and marine sediments. Typically, these soils have a very dark
brown mucky silt loam surface from 0 to 13 inches, and black mucky loam subsurface
from 13 to 25 inches. The substratum is a grayish-brown sand from 25 to 41 inches and
dark grayish brown loamy sand and sand from 41 to 72 inches. The substratum has
black organic stains. This soil is very poorly drained. The slowest permeability within
60 inches is moderate. Available water capacity is very high and shrink swell potential
is low. This soil is frequently flooded and is not ponded. The top of the seasonal high
water table is at 0 inches. There are no saline horizons. This component is a hydric soil.
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