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
Runclint The Runclint series consists of very deep excessively drained soils on uplands and
alluvial terraces. They formed in unconsolidated sandy alluvial and marine sediments.
Typically these soils have a dark brown surface layer 9 inches thick and a subsurface
layer from 9 to 22 inches of yellowish brown sand. The subsoil between 22 and 40
inches is yellowish red sand. The substratum from 40 to 60 inches is yellowish brown
sand. From 60 to 72 inches it is mottled stratified sand through sandy clay loam. This
soil is excessively drained. The slowest permeability within 60 inches is moderate.
Available water capacity is moderate to high and shrink swell potential is low. This soil
is not flooded and is not ponded. The top of the seasonal high water table is at 45 to 60
inches. There are no saline horizons. This component is not a hydric soil.
Sassafras The Sassafras series consists of deep well-drained soils on uplands. They formed in
marine or alluvial Coastal Plain sediments. Typically, these soils have a brown gravelly
sandy loam surface layer, 9 inches thick. The subsoil, from 9 to 21 inches, is yellowishbrown
loam, from 21 to 32 inches, is brown sandy clay loam, and, from 32 to 40 in., is
strong brown sandy loam. The substratum, from 40 to 52 inches, is strong brown
gravelly sandy loam and, from 52 to 70 in., is brownish-yellow loamy sand. Depth to a
root restrictive layer is greater than 60 inches. Water movement in the most restrictive
layer is moderately high. Available water to a depth of 60 inches is moderate. Shrinkswell
potential is low. This soil is not flooded. It is not ponded. There is no zone of
water saturation within a depth of 72 inches. Organic matter content in the surface
horizon is about 2 percent. This soil does not meet hydric criteria.
Sunken The Sunken series consists of very deep very poorly drained soils formed in loamy
eolian or alluvial deposits overlying sandy sediments of the Mid-Atlantic Coastal Plain.
They are on submerging uplands along tidal bays and rivers. Typically, the surface is
dark brown mucky silt loam 6 inches thick. The subsurface layer is light gray silt loam
to 18 inches. The subsoil is light gray silty clay loam to 38 inches. The substratum from
38 to 72 inches is gray very fine sandy loam and light olive gray fine sand. This
component is on flats, lowlands, submerged upland tidal marshes. The parent material
consists of silty eolian deposits over fluviomarine sediments. Depth to a root restrictive
layer is greater than 60 inches. Water movement in the most restrictive layer is
moderately low. Available water to a depth of 60 inches is very high. Shrink-swell
potential is low. This soil is occasionally flooded. It is occasionally ponded. A seasonal
zone of water saturation is at 5 inches year-round. Organic matter content in the surface
horizon is about 66 percent. This soil meets hydric criteria. The soil has a moderately
saline horizon within 30 inches of the soil surface. The soil has a moderately sodic
horizon within 30 inches of the soil surface.
Tidal Marsh Tidal Marsh consists of very deep very poorly drained soils on tidal flats subject to
inundation by salt water twice daily. They formed in organic material 16 to 51 inches
thick over loamy mineral deposits. Salt content in the soil ranges from 1,000 to 40,000
parts per million. Typically, the layers from 0 to 48 inches are very dark gray and dark
olive gray hemic materials. The substratum from 48 to 99 inches is very dark gray silt
loam.
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