LOCATION GREAT DITCH             NC

Established Series
ARW
10/2024

GREAT DITCH SERIES

MLRA--153B
Depth Class--Very deep
Drainage Class--Subaqueous (permanently submersed / continuously ponded)
Saturated Hydraulic Conductivity--Moderately high to high
Parent Material--Sandy lacustrine deposits
Slope--0 to 2 percent
Mean Annual Air Temperature--16 degrees C (62 degrees F)
Mean Annual Water Temperature--20 degrees C (68 degrees F)

TAXONOMIC CLASS: Siliceous, thermic Psammentic Frasiwassents

TYPICAL PEDON: Great Ditch fine sand on a submerged wave-cut platform with less than 2 percent slope under 0.8 meters of freshwater (Colors are for moist soil unless otherwise stated; electrical conductivity is 1:5 by volume solution mixture unless otherwise stated).

Cg--0 to 17 centimeters (0 to 7 inches); gray (2.5Y 6/1) fine sand; structureless massive; nonsticky, nonplastic; nonfluid; slightly acid (pH 6.3), moderately acid (pH 5.9) oxidized pH; no color reaction with 3% hydrogen peroxide; noneffervescent with 30% hydrogen peroxide; nonsaline (0.2133 dS m-1); abrupt boundary.

Aseg/C--17 to 64 centimeters (7 to 25 inches); variegated 60 percent black (2.5Y 2.5/1) crushed and 40 percent gray (5Y 6/1) fine sand; structureless massive; nonsticky, nonplastic; nonfluid; neutral (pH 6.6), slightly acid (pH 6.2) oxidized pH; no color reaction with 3% hydrogen peroxide; noneffervescent with 30% hydrogen peroxide; nonsaline (0.0644 dS m-1); gradual boundary.

Cseg1--64 to 102 centimeters (25 to 40 inches); gray (2.5Y 5/1) fine sand; structureless massive; nonsticky, nonplastic; nonfluid; neutral (pH 6.6), extremely acid (pH 3.7) oxidized pH; no color reaction with 3% hydrogen peroxide; slightly effervescent with 30% hydrogen peroxide; nonsaline (0.0553 dS m-1); clear boundary.

Cseg2--102 to 122 centimeters (40 to 48 inches); dark gray (5Y 4/1) loamy sand; structureless massive; nonsticky, nonplastic; nonfluid; neutral (pH 6.7), moderately acid (pH 5.7) oxidized pH; no color reaction with 3% hydrogen peroxide; slightly effervescent with 30% hydrogen peroxide; nonsaline (0.0442 dS m-1).

C'g--122 to 200 centimeters (48 to 56 inches); dark greenish gray (10Y 4/1) fine sand; structureless massive; nonsticky, nonplastic; nonfluid; slightly acid (pH 6.5), very strongly acid (pH 4.9) oxidized pH; no color reaction with 3% hydrogen peroxide; noneffervescent with 30% hydrogen peroxide; nonsaline (0.0447 dS m-1).

TYPE LOCATION: Hyde County, North Carolina; Lake Mattamuskeet; 2.72 miles northeast of Lake Mattamuskeet Boat Ramp, 4.22 miles west- northwest of Lake Mattamuskeet Observation Deck, 2.37 miles south-southwest of Osprey Nest Campground Boat Ramp. USGS Swanquarter topographic quadrangle.

Latitude--35.5003270
Longitude-- -76.2853160
Datum--WGS84
Coordinate source--from hand-held GPS

RANGE OF CHARACTERISTICS:
Depth to Bedrock--Greater than 200 centimeters
Depth to Seasonal High-Water Table--Permanently submerged
Depth to hyper-sulfidic materials (incubated pH 4.0)--50 to 120 centimeters

Manner of Failure / Fluidity Class--Nonfluid to slightly fluid; moderately fluid where appreciable organic soil materials are present.
Soil Reaction--Slightly acid to neutral throughout profile
Oxidized Soil Reaction--Ultra acid to extremely acid (pH 3.3 - 3.9) from 64 to 102 centimeters
Electrical Conductivity--Less than 0.6 dS m-1 throughout profile by 1:5 by volume solution mixture
Salinity Class--Nonsaline throughout profile
Reaction to 30% Hydrogen Peroxide--None to slight reaction throughout profile
Color Reaction to 3% Hydrogen Peroxide--No reaction throughout profile

Ase or Aseg (where present) horizon:
Hue--10YR or 2.5Y
Value--2 to 3
Chroma--1 or 2
Texture--fine sand, loamy fine sand, or their mucky analogs
Manner of failure / fluidity class--nonfluid to moderately fluid

Cg or Cseg (where present) or CAseg (where present) horizon:
Hue--2.5Y or 10YR
Value--4 to 6
Chroma--1 to 3
Texture-- loamy fine sand or fine sand
Manner of failure / fluidity class--nonfluid

2Cseg or 2Cg or 2C'g horizon:
Hue--2.5Y, 5Y, or 10Y
Value--3 to 5
Chroma--1 to 3
Texture--fine sand or loamy sand
Manner of failure / fluidity class--nonfluid or slightly fluid

COMPETING SERIES:
There are no competing series in the same family.

GEOGRAPHIC SETTING:
Parent Material--Sandy lacustrine deposits
Landscape--Southeast Coastal Plain Lakes and Carolina Bays
Landform--Submerged wave-cut platforms
Slope--0 to 2 percent
Mean Annual Air Temperature--15 to 19 degrees C (59 to 66 degrees F)
Mean Annual Water Temperature--15.5 to 20 degrees C (60 to 68 degrees F)
Water Depth Range--0 to 1.5 meters (0 to 4 feet) below mean sea level
Water Regime--Nontidal
Water Salinity Range--Nonsaline

GEOGRAPHICALLY ASSOCIATED SOILS:
These are the Belhaven, Cipre, Coree, Engelhard, Flyway, Machapunga and Newholland soils.
Belhaven soils--are in very poorly drained areas on flats, depressions, and flood plains in the Lower Coastal Plain; these soils formed in highly decomposed organic matter underlain by loamy marine deposits
Cipre soils--are on permanently submerged wave-cut platforms and lake beds in the coastal plain; these soils formed in woody organic material underlain by sandy lacustrine deposits.
Coree and Machapunga soils--are on submerged wave-cut platforms, permanently submerged lake terraces, and lake beds, these soils formed in coarse-silty and coarse-loamy deposits.
Engelhard soils--are in poorly drained lake-wash rims along Lake Mattamuskeet, these soils formed in sandy lacustrine lake-wash deposits that contain a high content of very fine sand and are underlain by marine or fluvial deposits.
Flyway soils--are on permanently submerged wave-cut platforms and lake terraces in the coastal plain, these soils formed in sandy lacustrine deposits.
Newholland soils--are on very poorly drained broad upland flats and along the outer edges of pocosins or flood plains in the coastal plain; these soils formed in loamy marine and fluvial deposits.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage Class--Subaqueous (permanently submerged)
Saturated Hydraulic Conductivity--Moderately high to high
Soil Moisture Regime--Peraquic

USE AND VEGETATION:
Major Uses--Most areas are unvegetated and function minimally as littoral and limnic habitat. Recreational use is waterfowl, hunting, and observation; historically, there was extensive fishing and boating. There are no known commercial uses.
Dominant Vegetation--Isolated clusters of Bald Cypress (Taxodium distichum) and historically wild celery (Vallisneria americana), sago pondweed (Stuckenia pectinate), southern naiad (Najas guadalupensis), and redhead grass (Potamogton perfoliatus).

DISTRIBUTION AND EXTENT:
General area--Natural lakes and Carolina Bays in the coastal plain of North Carolina and South Carolina.
Region--T - Atlantic and Gulf Coast Lowland Forest and Crop Region
MLRA(s)--153B
Extent--Small

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: SPECIAL PROJECTS OFFICE

SERIES ESTABLISHED: Hyde County, North Carolina, 2024

REMARKS:
Great Ditch is derived from the initial seven-mile canal excavated from Lake Mattamuskeet's south end to Wysocking Bay in 1837 by the North Carolina State Literary Board.

Diagnostic horizons and other diagnostic soil characteristics recognized in this pedon are (Keys to Soil Taxonomy, Thirteenth Edition, 2022)--

Reduced Matrix--0 to 143 centimeters (0 to 56 inches); soil matrix that has low chroma in situ but undergoes a change in hue or chroma within 30 minutes after the soil material has been exposed to air.
Endosaturation--0 to 143 centimeters (0 to 56 inches)
Sulfidic materials--64 to 102 centimeters (Cseg horizon, 25 to 40 inches)
Peraquic feature-Zero or positive soil water potential at the soil surface.

Data Map Unit ID: 919150
NASIS User Site and Pedon ID: S2022NC095107
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National Cooperative Soil Survey
U.S.A.