U.S. Army Corps of Engineers WETLAND DETERMINATION DATA SHEET – Hawaiʻi and Pacific Islands Region See ERDC/EL TR-12-5; the proponent agency is CECW-CO-R |
OMB Control #: 0710-0024, Exp: 11/30/2024 Requirement Control Symbol EXEMPT: (Authority: AR 335-15, paragraph 5-2a) |
Hawaiʻi and Pacific Islands Region Automated Wetland Determination Data Sheet (ADS) version 1.20 |
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Project/Site: |
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City: |
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Sampling Date: |
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Time: |
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Applicant/Owner: |
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State/Terr/Comlth.: |
Select the State, Territory, or Commonwealth for this site.
This information is necessary for use of the proper hydric
soil indicators and for plant species indicator statuses.
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Island: |
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Sampling Point: |
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Investigator(s): |
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TMK/Parcel: |
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Landform (hillside, coastal plain, etc.): |
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Local relief (concave, convex, none): |
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Lat: |
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Long: |
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Datum: |
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Slope (%): |
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Soil Map Unit Name: |
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NWI classification: |
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Are climatic / hydrologic conditions on the site typical for this time of year? |
Yes |
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No |
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(If no, explain in Remarks.) |
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Are Vegetation |
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, Soil |
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, or Hydrology |
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significantly disturbed? |
Are “Normal Circumstances” present? |
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Yes |
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No |
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Are Vegetation |
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, Soil |
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, or Hydrology |
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naturally problematic? |
(If needed, explain any answers in Remarks.) |
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SUMMARY OF FINDINGS – Attach site map showing sampling point locations, transects, important features, etc. |
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Hydrophytic Vegetation Present? |
Yes |
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No |
X |
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Is the Sampled Area |
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Hydric Soil Present? |
Yes |
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No |
X |
within a Wetland? |
Yes |
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No |
X |
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Wetland Hydrology Present? |
Yes |
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No |
X |
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Remarks: |
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VEGETATION – Use scientific names of plants. |
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Tree Stratum |
(Plot size: |
Enter a plot size for the vegetation sampling of this stratum.
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Absolute % Cover |
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Dominant Species? |
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Indicator Status |
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Dominance Test worksheet: |
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This sampling point has passed the Rapid Test for Hydrophytic Vegetation. |
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1. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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Number of Dominant Species That Are OBL, FACW, or FAC: |
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I do not wish to have the Dominance Test worksheet calculated. |
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2. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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(A) |
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3. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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Total Number of Dominant Species Across All Strata: |
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4. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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(B) |
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5. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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Percent of Dominant Species That Are OBL, FACW, or FAC: |
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=Total Cover |
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(A/B) |
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Sapling/Shrub Stratum |
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(Plot size: |
Enter a plot size for the vegetation sampling of this stratum.
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1. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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Prevalence Index worksheet: |
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This sampling point has passed the Rapid Test for Hydrophytic Vegetation |
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2. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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Total % Cover of: |
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Multiply by: |
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and/or the Dominance Test. I do not wish to have the Prevalence Index |
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3. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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OBL species |
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x 1 = |
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worksheet calculated. |
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4. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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FACW species |
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x 2 = |
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5. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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FAC species |
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x 3 = |
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=Total Cover |
FACU species |
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x 4 = |
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Herb Stratum |
(Plot size: |
Enter a plot size for the vegetation sampling of this stratum.
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UPL species |
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x 5 = |
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1. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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Column Totals: |
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(A) |
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(B) |
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2. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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Prevalence Index = B/A = |
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3. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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4. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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Hydrophytic Vegetation Indicators: |
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5. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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1 - Rapid Test for Hydrophytic Vegetation |
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6. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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2 - Dominance Test is >50% |
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7. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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3 - Prevalence Index is ≤3.01 |
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8. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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Problematic Hydrophytic Vegetation1 (Explain) |
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=Total Cover |
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1Indicators of hydric soil and wetland hydrology must be present, unless disturbed or problematic. |
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Woody Vine Stratum |
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(Plot size: |
Enter a plot size for the vegetation sampling of this stratum.
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) |
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1. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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Hydrophytic Vegetation Present? |
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2. |
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Select the State, Territory, or Commonwealth above. This information is
necessary for use of the proper plant indicator statuses for plant species.
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=Total Cover |
Yes |
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No |
X |
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Remarks: |
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ENG FORM 6116-6, JUL 2018 |
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Hawaiʻi and Pacific Islands – Version 2.0 |
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SOIL |
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Sampling Point: |
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|
Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) |
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Depth |
|
Matrix |
|
Redox Features |
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(inches) |
Color (moist) |
|
% |
Color (moist) |
|
% |
|
Type1 |
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Loc2 |
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Texture |
|
Remarks |
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Err:504 |
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Err:504 |
Err:504 |
Err:504 |
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Err:504 |
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Err:504 |
Err:504 |
Err:504 |
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Err:504 |
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Err:504 |
Err:504 |
Err:504 |
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1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, MS=Masked Sand Grains. |
2Location: PL=Pore Lining, M=Matrix. |
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Hydric Soil Indicators: |
Indicators for Problematic Hydric Soils3: |
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In Histosols, typically 16 inches (40 cm) or more of the upper 32 inches (80 cm) is organic
soil material or that have organic soil material of any thickness over rock or fragmental soil
material that has interstices filled with organic soil material.
This indicator does not include Folists: freely drained Histosols that are saturated with water
for less than 30 cumulative days during normal years (and are not artificially drained).
|
Histosol (A1) |
A layer starting at a depth ≤6 inches (15 cm) from the soil surface that is at least 4 inches (10 cm)
thick and has a matrix with 60 percent or more chroma of 2 or less and 2 percent or more distinct
or prominent redox concentrations occurring as soft masses and/or pore linings.
|
Sandy Redox (S5) |
Several stratified layers starting at a depth ≤6 inches (15 cm) from the soil surface. At
least one of the layers has value of 3 or less and chroma of 1 or less, or it is muck,
mucky peat, peat, or a mucky modified mineral texture. The remaining layers have
chroma of 2 or less. For any sandy material that constitutes the layer with value of 3 or
less and chroma of 1 or less, at least 70 percent of the visible soil particles must be
masked with organic material, viewed through a 10x or 15x hand lens. Observed
without a hand lens, the particles appear to be close to 100 percent masked.
Use of this indicator may require assistance from a trained soil scientist with local
experience. A stratified layer is depositional and not pedogenic. An undisturbed sample
must be observed. Individual strata are dominantly less than 1 inch (2.5 cm) thick. A
hand lens is an excellent tool to aid in the identification of this indicator. Many alluvial
soils have stratified layers at greater depths; these soils do not meet the requirements
of this indicator. Many alluvial soils have stratified layers at the required depths but do
not have chroma of 2 or less; these do not meet the requirements of this indicator.
|
Stratified Layers (A5) |
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A histic epipedon underlain by mineral soil material with chroma of 2 or less. Most histic
epipedons are surface horizons 8 inches (20 cm) or more thick of organic soil material.
Aquic conditions or artificial drainage are required; however, aquic conditions can be
assumed if indicators of hydrophytic vegetation and wetland hydrology are present.
|
Histic Epipedon (A2) |
A layer starting at a depth ≤6 inches (15 cm) from the soil surface in which iron-manganese
oxides and/or organic matter have been stripped from the matrix and the primary base
color of the soil material has been exposed. The stripped areas and translocated oxides
and/or organic matter form a faintly contrasting pattern of two or more colors with diffuse
boundaries. The stripped zones are 10 percent or more of the volume and are rounded.
|
Stripped Matrix (S6) (Guam, CNMI, |
A layer derived from red parent materials that is at least 4 inches (10 cm) thick, starting at a
depth ≤10 inches (25 cm) from the soil surface with a hue of 7.5YR or redder. The matrix
has a value and chroma greater than 2 and less than or equal to 4. The layer must contain
10 percent or more depletions and/or distinct or prominent redox concentrations occurring
as soft masses or pore linings. Redox depletions should differ in color by having:
a. Value one or more higher and chroma one or more lower than the matrix, or
b. Value of 4 or more and chroma of 2 or less.
|
Red Parent Material (F21) |
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A layer of peat, mucky peat, or muck 8 inches (20 cm) or more thick that starts at a depth
of ≤6 inches (15 cm) from the soil surface; has hue of 10YR or yellower, value of 3 or less,
and chroma of 1 or less; and is underlain by mineral soil material with chroma of 2 or less.
|
Black Histic (A3) |
and American Samoa) |
In depressions and and flood plains subject to frequent ponding and/or flooding, one of the
following must be observed:
a. If bedrock occurs between 6 inches (15 cm) and 10 inches (25 cm) of the soil surface, a layer
at least 6 inches (15 cm) thick starting at a depth ≤4 inches (10 cm) from the soil surface with a
value 2.5 or less and chroma 1 or less, and the remaining soil to bedrock must have the
same colors as above or any other color that has chroma of 2 or less.
b. If bedrock occurs at a depth ≤6 inches (15 cm) from the soil surface, more than half of the
soil thickness must have value 2.5 or less and chroma 1 or less and the remaining soil to bedrock
must have the same colors as above or any other color that has chroma of 2 or less.
|
Very Shallow Dark Surface (F22) |
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A hydrogen sulfide odor starting at a depth ≤12 inches (30 cm) from the soil surface.
|
Hydrogen Sulfide (A4) |
A layer 4 inches (10 cm) thick, starting at a depth less than or equal to the upper 6 inches (15 cm)
from the soil surface, with a matrix value 3 or less and chroma of 1 or less. At least 70 percent of
the visible soil particles must be masked with organic material, viewed through a 10x or 15x hand
lens. Observed without a hand lens, the particles appear to be close to 100 percent masked.
The matrix color of the layer directly below the dark layer must have the same colors as those
described above or any color that has chroma of 2 or less.
From Regional Supplement v2.0 User Notes: If the dark layer is greater than 4 inches (10 cm)
thick, then the indicator is met, because any dark soil material in excess of 4 inches (10 cm)
meets the requirement that "the layer immediately below the dark layer must have the same
colors as those described above…". If the dark layer is exactly 4 inches (10 cm) thick, then
the material immediately below must have a matrix chroma of 2 or less.
|
Dark Surface (S7) |
|
Other (Explain in Remarks) |
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A layer of muck with value of 3 or less and chroma of 1 or less, starting at a depth ≤6 inches (15 cm) from the soil surface.
|
Muck Presence (A8) |
A gleyed matrix that occupies 60 percent or more of a layer
starting at a depth ≤12 inches (30 cm) from the soil surface.
|
Loamy Gleyed Matrix (F2) |
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A layer with a depleted or gleyed matrix that has 60 percent or more chroma of 2 or less, starting at a
depth ≤12 inches (30 cm) from the soil surface, and having a minimum thickness of either:
a. 6 inches (15 cm), or
b. 2 inches (5 cm) if the 2 inches consists of fragmental soil material.
Organic, loamy, or clayey layer(s) above the depleted or gleyed matrix must have value of 3 or less
and chroma of 2 or less starting at a depth ≤6 inches (15 cm) from the soil surface and extend to the
depleted or gleyed matrix. Any sandy material above the depleted or gleyed matrix must have value
of 3 or less and chroma of 1 or less starting at a depth ≤6 inches (15 cm) from the soil surface and
extend to the depleted or gleyed matrix. Viewed through a 10x or 15x hand lens, at least 70 percent
of the visible sand particles must be masked with organic material. Observed without a hand lens, the
sand particles appear to be close to 100 percent masked. A, E, and calcic horizons may have low
chromas and high values and may therefore be mistaken for a depleted matrix; however, they are
excluded from the concept of depleted matrix unless the soil has common or many distinct or
prominent redox concentrations occurring as soft masses or pore linings. The low-chroma matrix must
be the result of wetness and not a weathering or parent material feature.
|
Depleted Below Dark Surface (A11) |
A layer that has a depleted matrix with 60 percent or more chroma of 2 or less and that has
a minimum thickness of either:
a. 2 inches (5 cm) if the 2 inches starts at a depth ≤4 inches (10 cm) from the soil surface, or
b. 6 inches (15 cm), starting at a depth ≤10 inches (25 cm) from the soil surface.
A, E, and calcic horizons may have low chromas and high values and may therefore be
mistaken for a depleted matrix; however, they are excluded from the concept of depleted
matrix unless the soil has common or many distinct or prominent redox concentrations
occurring as soft masses or pore linings. The low-chroma matrix must be the result of
wetness and not a weathering or parent material feature.
|
Depleted Matrix (F3) |
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A layer at least 6 inches (15 cm) thick with a depleted or gleyed matrix that has 60 percent or more chroma
of 2 or less starting below 12 inches (30 cm) of the surface. The layer(s) above the depleted or gleyed
matrix and starting at a depth <6 inches (15 cm) from the soil surface must have value of 2.5 or less and
chroma of 1 or less to a depth of at least 12 inches (30 cm) and value of 3 or less and chroma of 1 or less in
any remaining layers above the depleted or gleyed matrix. In any sandy material above the depleted or
gleyed matrix, at least 70 percent of the visible soil particles must be masked with organic material, viewed
through a 10x or 15x hand lens. Observed without a hand lens, the particles appear to be close to 100
percent masked. A, E, and calcic horizons may have low chromas and high values and may therefore be
mistaken for a depleted matrix; however, they are excluded from the concept of depleted matrix unless the
soil has common or many distinct or prominent redox concentrations occurring as soft masses or pore linings.
The low- chroma matrix must be the result of wetness and not a weathering or parent material feature.
|
Thick Dark Surface (A12) |
A layer that is at least 4 inches (10 cm) thick, starting at a depth ≤8 inches
(20 cm) from the mineral soil surface, and has:
a. Matrix value of 3 or less and chroma of 1 or less and 2 percent or more distinct
or prominent redox concentrations occurring as soft masses or pore linings, or
b. Matrix value of 3 or less and chroma of 2 or less and 5 percent or more distinct
or prominent redox concentrations occurring as soft masses or pore linings.
|
Redox Dark Surface (F6) |
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A layer of mucky modified sandy soil material 2 inches (5 cm) or more
thick starting at a depth ≤6 inches (15 cm) from the soil surface.
|
Sandy Mucky Mineral (S1) |
Redox depletions with value of 5 or more and chroma of 2 or less in a layer that is at least 4 inches
(10 cm) thick, starting at a depth ≤8 inches (20 cm) from the mineral soil surface, and has:
a. Matrix value of 3 or less and chroma of 1 or less and 10 percent or more redox depletions, or
b. Matrix value of 3 or less and chroma of 2 or less and 20 percent or more redox depletions.
Care should be taken not to mistake mixing of an E or calcic horizon into the surface layer for
depletions. The “pieces” of E and calcic horizons are not redox depletions.
|
Depleted Dark Surface (F7) |
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3Indicators of hydrophytic vegetation and wetland hydrology |
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A gleyed matrix that occupies 60 percent or more of a layer starting at a depth ≤6 inches (15 cm) from the soil surface.
|
Sandy Gleyed Matrix (S4) |
In closed depressions subject to ponding, 5 percent or more distinct or prominent
redox concentrations occurring as soft masses or pore linings in a layer that is 2 inches
(5 cm) or more thick and starts at a depth ≤4 inches (10 cm) from the soil surface.
|
Redox Depressions (F8) |
must be present, unless disturbed or problematic. |
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Restrictive Layer (if observed): |
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Type: |
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Depth (inches): |
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Hydric Soil Present? |
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Yes |
Note: If macros are disabled, check this blank if the only hydric soil indicator verified
is Histic Epipedon (A2) or is on the list of indicators for problematic hydric soils.
|
No |
X |
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Remarks: |
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HYDROLOGY |
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Wetland Hydrology Indicators: |
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Primary Indicators (minimum of one is required; check all that apply) |
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Secondary Indicators (minimum of two required) |
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This indicator consists of the direct, visual observation of surface water (flooding or ponding) during a site visit.
|
Surface Water (A1) |
Presence of live individuals, diapausing insect eggs or crustacean cysts, or dead
remains of aquatic fauna, such as, but not limited to, sponges, bivalves, aquatic
snails, aquatic insects, ostracods, shrimp, other crustaceans, tadpoles, or
fish, either on the soil surface or clinging to plants or other emergent objects.
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Aquatic Fauna (B13) |
Surface soil cracks consist of shallow cracks that form when fine-grained mineral or
organic sediments dry and shrink, often creating a network of cracks or small polygons.
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Surface Soil Cracks (B6) |
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This indicator consists of the direct, visual observation of the water table 12 inches (30 cm)
or less below the surface in a soil pit, auger hole, or shallow monitoring well. This indicator
includes water tables influenced by tides or derived from perched water, throughflow, and
discharging groundwater (e.g., in seeps) that may be moving laterally near the soil surface.
|
High Water Table (A2) |
Presence of shallow, bowl-like depressions formed in shallow water by nesting tilapia.
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Tilapia Nests (B17) |
On concave land surfaces (e.g., depressions and swales), the
ground surface is either unvegetated or sparsely vegetated
(less than 5 percent ground cover) due to long-duration ponding.
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Sparsely Vegetated Concave Surface (B8) |
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Visual observation of saturated soil conditions 12 inches (30 cm) or less from the soil surface as
indicated by water glistening on the surfaces and broken interior faces of soil samples removed
from the pit or auger hole. This indicator must be associated with an existing water table located
immediately below the saturated zone; however, this requirement is waived under episaturated
conditions if there is a restrictive soil layer or bedrock within 12 inches (30 cm) of the surface.
|
Saturation (A3) |
A hydrogen sulfide (rotten egg) odor within 12 inches (30 cm) of the soil surface.
Note: If macros are disabled, check this blank if you have hydric soil indicator Hydrogen Sulfide (A4) checked.
|
Hydrogen Sulfide Odor (C1) |
This indicator consists of flow patterns visible on the soil surface or eroded into the soil,
low vegetation bent over in the direction of flow, absence of leaf litter or small woody debris
due to flowing water, and similar evidence that water flowed across the ground surface.
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Drainage Patterns (B10) |
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Water marks are discolorations or stains on the bark of woody vegetation, rocks,
bridge supports, buildings, fences, or other fixed objects as a result of inundation.
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Water Marks (B1) |
Presence of a layer of any thickness containing 2 percent or more iron-oxide coatings
or plaques on the surfaces of living roots and/or iron-oxide coatings or linings on soil
pores immediately surrounding living roots within 12 inches (30 cm) of the surface.
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Oxidized Rhizospheres on Living Roots (C3) |
Visual observation of the water table between 12 and 24 inches (30 and 60 cm)
below the surface during the normal dry season or during a drier-than-normal year.
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Dry-Season Water Table (C2) |
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Sediment deposits are thin layers or coatings of fine-grained mineral material (e.g., silt
or clay) or organic matter (e.g., pollen), sometimes mixed with other detritus, remaining
on tree bark, plant stems or leaves, rocks, and other objects after surface water recedes.
|
Sediment Deposits (B2) |
Presence of a layer containing reduced (ferrous) iron in the upper
12 inches (30 cm) of the soil profile, as indicated by a ferrous iron test
or by the presence of a soil that changes color upon exposure to the air.
|
Presence of Reduced Iron (C4) |
Salt deposits are whitish or brownish deposits of salts that accumulate on the ground surface
through the evaporation of saline surface water or the capillary action of saline groundwater.
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Salt Deposits (C5) |
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Drift deposits consist of rafted debris that has been deposited on the ground surface or entangled
in vegetation or other fixed objects. Debris consists of remnants of vegetation (e.g., branches,
stems, and leaves), man-made litter, or other waterborne materials. Drift material may be
deposited at or near the high water line in ponded or flooded areas, piled against the upstream
sides of trees, rocks, and other fixed objects, or widely distributed within the dewatered area.
|
Drift Deposits (B3) |
Presence of a layer containing 2 percent or more redox concentrations as pore linings or soft masses in the
tilled surface layer of soils cultivated within the last two years. The layer containing redox concentrations
must be within the tilled zone or within 12 inches (30 cm) of the soil surface, whichever is shallower.
|
Recent Iron Reduction in Tilled Soils (C6) |
This indicator is present if individuals of the same species growing in the
potential wetland are clearly of smaller stature, less vigorous, or stressed
compared with individuals growing in nearby non-wetland situations.
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Stunted or Stressed Plants (D1) |
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This indicator consists of a mat or dried crust of algae, perhaps mixed
with other detritus, left on or near the soil surface after dewatering.
|
Algal Mat or Crust (B4) |
This indicator consists of a layer of muck 1 inch (2.5 cm) or less thick on the soil surface.
|
Thin Muck Surface (C7) |
This indicator is present if the area in question is located on a tidal flat, in a localized depression, in
the low area behind a beach berm, within a floodplain or drainageway, at the toe of a slope, on the
low-elevation fringe of a pond or other water body, or in an area where groundwater discharges.
|
Geomorphic Position (D2) |
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This indicator consists of a thin orange or yellow crust or gel of oxidized iron on the ground surface or on objects near the surface.
|
Iron Deposits (B5) |
On coastal flats and shorelines, the presence of fiddler crab (Uca spp.) burrows,
as indicated by openings in soft soil or sand approximately 0.5 to 1 in. (1 to 2 cm)
in diameter, often associated with excavated balls of mud or sand.
|
Fiddler Crab Burrows (C10) (Guam, CNMI, |
This indicator occurs in and around the margins of depressions, in flat landscapes, and on mountain
slopes with ironstone or cemented ash layers, and consists of the presence of an aquitard within
the soil profile that is potentially capable of perching water within 12 in. (30 cm) of the surface.
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Shallow Aquitard (D3) |
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One or more recent aerial photographs or satellite images show the site to be inundated.
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Inundation Visible on Aerial Imagery (B7) |
and American Samoa) |
The plant community passes the FAC-neutral test.
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FAC-Neutral Test (D5) |
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Water-stained leaves are fallen or recumbent dead leaves that have turned grayish or blackish in color due to inundation for long periods.
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Water-Stained Leaves (B9) |
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Other (Explain in Remarks) |
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Field Observations: |
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Surface Water Present? |
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Yes |
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No |
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Depth (inches): |
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Water Table Present? |
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Yes |
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No |
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Depth (inches): |
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Saturation Present? |
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Yes |
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No |
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Depth (inches): |
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Wetland Hydrology Present? |
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Yes |
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No |
X |
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(includes capillary fringe) |
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Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: |
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Remarks: |
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ENG FORM 6116-6, FEB 2024 |
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Hawaiʻi and Pacific Islands – Version 2.0 |
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