ENG Form 6116 Wetland Determination Data Sheet - Alaska Region

Jurisdictional Determination Forms and Aquatic Resources Delineation Forms

Alaska_ADS.xlsm

OMB: 0710-0024

⚠️ Notice: This form may be outdated. More recent filings and information on OMB 0710-0024 can be found here:

2024-04-02 - Revision of a currently approved collection

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Overview

Page 1 (Vegetation)
Page 2 (Soil & Hydrology)
Vegetation Continued
Privacy Act Information

Sheet 1: Page 1 (Vegetation)

U.S. Army Corps of Engineers
WETLAND DETERMINATION DATA SHEET – Alaska Region
See ERDC/EL TR-07-24; 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)

Alaska Region Automated Wetland Determination Data Sheet (ADS) version 1.20

Project/Site:

Borough/City:

Sampling Date:

Applicant/Owner:

Sampling Point:

Investigator(s):

Landform (hillside, terrace, hummocks, etc.):

Local relief (concave, convex, none):

Slope (%):

Subregion:

Select the Land Resource Region and Major Land Resource Area for this site. This information is necessary for use of the proper indicator statuses for a few plant species.

Lat:

Long:

Datum:

Soil Map Unit Name:

NWI classification:

Are climatic / hydrologic conditions on the site typical for this time of year?

Yes

(If no, explain in Remarks.)

Are Vegetation

, Soil

, or Hydrology

significantly disturbed?

Are “Normal Circumstances” present?

Yes

Are Vegetation

, Soil

, or Hydrology

naturally problematic?

(If needed, explain any answers in Remarks.)

SUMMARY OF FINDINGS – Attach site map showing sampling point locations, transects, important features, etc.

Hydrophytic Vegetation Present?

Yes

Is the Sampled Area

Hydric Soil Present?

Yes

within a Wetland?

Yes

Wetland Hydrology Present?

Yes

Remarks:

VEGETATION – Use scientific names of plants.

Tree Stratum

Absolute % Cover

Dominant Species?

Indicator Status

Dominance Test worksheet:

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

Number of Dominant Species That Are OBL, FACW, or FAC:

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

(A)

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

Total Number of Dominant Species Across All Strata:

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

(B)

=Total Cover

Percent of Dominant Species That Are OBL, FACW, or FAC:

50% of total cover:

20% of total cover:

(A/B)

Sapling/Shrub Stratum

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

Prevalence Index worksheet:

This sampling point has passed the Dominance Test.

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

Total % Cover of:

Multiply by:

I do not wish to have the Prevalence Index worksheet calculated.

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

OBL species

x 1 =

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

FACW species

x 2 =

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

FAC species

x 3 =

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

FACU species

x 4 =

=Total Cover

UPL species

x 5 =

50% of total cover:

20% of total cover:

Column Totals:

(A)

(B)

Herb Stratum

Prevalence Index = B/A =

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

Hydrophytic Vegetation Indicators:

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

Dominance Test is >50%

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

Prevalence Index is ≤3.01

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

Morphological Adaptations1(Provide supporting

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

data in Remarks or on a separate sheet)

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

Problematic Hydrophytic Vegetation1 (Explain)

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

1Indicators of hydric soil and wetland hydrology must be present, unless disturbed or problematic.

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

10.

Select the Subregion above. This information is necessary for use of the proper indicator statuses for a few plant species.

=Total Cover

50% of total cover:

20% of total cover:

Plot Size (radius, or length x width)

Enter a plot size for the vegetation sampling.

% Bare Ground

Hydrophytic Vegetation Present?

% Cover of Wetland Bryophytes

Total Cover of Bryophytes

(Where applicable)

Yes

Remarks:

ENG FORM 6116, JUL 2018

Alaska – Version 2.0

Sheet 2: Page 2 (Soil & Hydrology)

SOIL

Sampling Point:

Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.)

Depth

Matrix

Redox Features

(inches)

Color (moist)

Type1

Loc2

Texture

Remarks

Err:504

1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains.

2Location: PL=Pore Lining, M=Matrix.

Hydric Soil Indicators:

Indicators for Problematic Hydric Soils3:

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. Histels are simply Histosols that have permafrost in the soil profile, so some part of the organic material may be permanently frozen. This indicator does not include Folists or Folistels: freely drained Histosols or Histels that are saturated with waterfor less than 30 cumulative days during normal years (and are not artificially drained).

Histosol or Histel (A1)

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 mineral layer 4 inches (10 cm) or more thick, starting at a depth ≤12 inches (30 cm) from the surface, that has a matrix value of 4 or more and chroma of 2 or less and that within 30 minutes becomes redder by one or more Munsell unit in hue and/or chroma when exposed to air.

Alaska Color Change (TA4)4

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. A histic epipedon must be saturated in all or part of the layer at some time in most years. The best evidence of saturation is the presence of a water table during at least part of the growing season. Saturation should be observable during peak periods within each subregion or may be inferred from wetland hydrology indicators outside of the peak period.

Histic Epipedon (A2)

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)

On concave landforms, the presence of a surface mineral layer 4 inches (10 cm) or more thick having hue of 10YR or yellower, value of 2.5 or less, and chroma of 2 or less. The dark surface layer is at least twice as thick as the mineral surface layer of soils in the adjacent convex micro-positions. Make sure that there is reasonable evidence of the hydrology source, including either direct observation of the melting snowpack or aerial imagery that shows snowpack at that location earlier in the growing season.

Alaska Alpine Swales (TA5)

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)

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)

A mineral layer that has dominant hue of 2.5Y with chroma of 3 or less, with 10 percent or more distinct or prominent redox concentrations occurring as pore linings with value and chroma of 4 or more. The layer occurs at a depth ≤12 inches (30 cm) from the soil surface.

Alaska Redox With 2.5Y Hue

A hydrogen sulfide odor starting at a depth ≤12 inches (30 cm) from the soil surface.

Hydrogen Sulfide (A4)

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)

Alaska Gleyed Without Hue 5Y or Redder

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)

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)

Underlying Layer

A mineral layer with a dominant hue of N, 10Y, 5GY, 10GY, 5G, 10G, 5BG, 10BG, 5B, 10B, or 5PB and with value of 4 or more in more than 50 percent of the matrix. The layer starts at a depth ≤12 inches (30 cm) from the mineral surface and is underlain at a depth ≤60 inches (1.5 m) from the soil surface by soil material with hue of 5Y or redder in the same type of parent material.

Alaska Gleyed (A13)

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)

Other (Explain in Remarks)

A mineral layer that has dominant hue of 5Y with chroma of 3 or less, or a gleyed matrix, with 10 percent or more distinct or prominent redox concentrations occurring as pore linings with value and chroma of 4 or more. The layer starts at a depth ≤12 inches (30 cm) from the soil surface.

Alaska Redox (A14)

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)

A mineral layer that has 10 percent or more hue of N, 10Y, 5GY, 10GY, 5G, 10G, 5BG, 10BG, 5B, 10B, or 5PB with value of 4 or more along root channels or other pores and that starts at a depth ≤12 inches (30 cm) from the soil surface. The matrix has a dominant hue of 5Y or redder.

Alaska Gleyed Pores (A15)

3One indicator of hydrophytic vegetation, one primary indicator of wetland hydrology,

and an appropriate landscape position must be present unless disturbed or problematic.

4Give details of color change in Remarks.

Restrictive Layer (if observed):

Type:

Depth (inches):

Hydric Soil Present?

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.

Remarks:

HYDROLOGY

Wetland Hydrology Indicators:

Secondary Indicators (2 or more required)

Primary Indicators (any one indicator is sufficient)

Water-stained leaves are fallen leaves or needles that have turned grayish or blackish in color due to inundation for long periods.

Water-Stained Leaves (B9)

This indicator consists of the direct, visual observation of surface water (flooding or ponding) during a site visit.

Surface Water (A1)

One or more recent aerial photographs or satellite images show the site to be inundated.

Inundation Visible on Aerial Imagery (B7)

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.

Drainage Patterns (B10)

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 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)

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 during the growing season.

Sparsely Vegetated Concave Surface (B8)

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.

Oxidized Rhizospheres along Living Roots (C3)

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)

This indicator consists of the presence of marl on the soil surface.

Marl Deposits (B15)

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)

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.

Water Marks (B1)

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)

Salt deposits are whitish or brownish deposits of salts that accumulate on the ground surface through the capillary action of groundwater.

Salt Deposits (C5)

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)

Visual observation of the water table between 12 and 24 inches (30 and 60 cm) below the surface for mineral soils, or between 12 and 40 inches (30 and 100 cm) for organic soils, during the normal dry season or during a drier-than-normal year.

Dry-Season Water Table (C2)

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.

Stunted or Stressed Plants (D1)

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)

Other (Explain in Remarks)

This indicator is present if the area in question is located in a localized depression or other concave surface, within a minor drainage or an active floodplain, 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)

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 the presence of an aquitard within 24 inches (60 cm) of the soil surface that is potentially capable of perching water within 12 inches (30 cm) of the surface.

Shallow Aquitard (D3)

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)

This indicator consists of the presence of microtopographic features that occur in areas of seasonal inundation or shallow water tables, such as hummocks, tussocks, and flark-and- strang topography, with microhighs less than 36 inches (90 cm) above the base soil level.

Microtopographic Relief (D4)

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.

Surface Soil Cracks (B6)

The plant community passes the FAC-neutral test.

FAC-Neutral Test (D5)

Field Observations:

Surface Water Present?

Yes

Depth (inches):

Water Table Present?

Yes

Depth (inches):

Saturation Present?

Yes

Depth (inches):

Wetland Hydrology Present?

Yes

(includes capillary fringe)

Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available:

Remarks:

ENG FORM 6116, JUL 2018

Alaska – Version 2.0

Sheet 3: Vegetation Continued

VEGETATION Continued			– Use scientific names of plants.								Sampling Point:

	Tree Stratum			Absolute % Cover			Dominant Species?	Indicator Status		Definitions of Vegetation Strata:
	5.							Tree – Woody plants 3 in. (7.6 cm) or more in diameter at breast height (DBH), regardless of height.
	6.
	7.
	8.								Sapling/Shrub – Woody plants less than 3 in. DBH, regardless of height.
	9.
	10.								Herb – All herbaceous (non-woody) plants, regardless of size.
	11.
	12.
							=Total Cover
		50% of total cover:			20% of total cover:
	Sapling/Shrub Stratum
	7.
	8.
	9.
	10.
	11.
	12.
	13.
	14.
						=Total Cover
		50% of total cover:			20% of total cover:
	Herb Stratum
	11.
	12.
	13.
	14.
	15.
	16.
	17.
	18.
	19.
	20.
	21.
	22.
						=Total Cover
		50% of total cover:			20% of total cover:

	Remarks:













ENG FORM 6116, JUL 2018												Alaska – Version 2.0

Sheet 4: Privacy Act Information

AGENCY DISCLOSURE NOTIFICATION
The public reporting burden for this collection of information, OMB Control Number 0710-0024, is estimated to average 30 minutes per response, including the timefor reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding the burden estimate or burden reduction suggestions to the Department of Defense, Washington Headquarters Services,at [email protected]. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR REQUEST TO THE ABOVE EMAIL.
PRIVACY ACT STATEMENT
Authorities: Rivers and Harbors Act, Section 10, 33 USC 403; Clean Water Act, Section 404, 33 USC 1344; Marine Protection, Research, and Sanctuaries Act, Section 103, 33 USC 1413; Regulatory Programs of the Corps of Engineers; Final Rule 33 CFR 320-332. Principal Purpose: Information provided on this form will be used in evaluating the application for a permit. Routine Uses: This information may be shared with the Department of Justice and other federal, state, and local government agencies, and the public and may be made available as part of a public notice as required by Federal law. Submission of requested information is voluntary, however, if information is not provided the permit application cannot be evaluated nor can a permit be issued. One set of original drawings or good reproducible copies which show the location and character of the proposed activity must be attached to this application (see sample drawings and/or instructions) and be submitted to the District Engineer having jurisdiction over the location of the proposed activity. An application that is not completed in full will be returned. System of Record Notice (SORN). The information received is entered into our permit tracking database and a SORN has been completed (SORN #A1145b) and may be accessed at the following website: http://dpcld.defense.gov/Privacy/SORNsIndex/DOD-wide-SORN-Article-View/Article/570115/a1145b-ce.aspx

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