21-104125-SEPA Checklist-10-05-2021-V1SEPA ENVIRONMENTAL CHECKLIST
WAC 197-11-960
WAC 197-11-960 SEPA Environmental Checklist Page | 1
PURPOSE OF CHECKLIST:
The State Environmental Policy Act (SEPA), chapter 43.21C RCW, requires all governmental agencies to
consider the environmental impacts of a proposal before making decisions. An environmental impact
statement (EIS) must be prepared for all proposals with probable significant adverse impacts on the
quality of the environment. The purpose of this checklist is to provide information to help you and the
agency identify impacts from your proposal (and to reduce or avoid impacts from the proposal, if it can
be done) and to help the agency decide whether an EIS is required.
INSTRUCTIONS FOR APPLICANTS:
This environmental checklist asks you to describe some basic information about your proposal.
Governmental agencies use this checklist to determine whether the environmental impacts of your
proposal are significant, requiring preparation of an EIS. Answer the questions briefly, with the most
precise information known, or give the best description you can.
You must answer each question accurately and carefully, to the best of your knowledge. In most cases,
you should be able to answer the questions from your own observations or project plans without the need
to hire experts. If you really do not know the answer, or if a question does not apply to your proposal,
write "do not know" or "does not apply." Complete answers to the questions now may avoid unnecessary
delays later.
Some questions ask about governmental regulations, such as zoning, shoreline, and landmark
designations. Answer these questions if you can. If you have problems, the governmental agencies can
assist you.
The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of
time or on different parcels of land. Attach any additional information that will help describe your
proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain
your answers or provide additional information reasonably related to determining if there may be
significant adverse impact.
USE OF CHECKLIST FOR NONPROJECT PROPOSALS:
For nonproject proposals complete this checklist and the supplemental sheet for nonproject actions (Part
D). The lead agency may exclude any question for the environmental elements (Part B) which they
determine do not contribute meaningfully to the analysis of the proposal.
For nonproject actions, the references in the checklist to the words "project," "applicant," and "property
or site" should be read as "proposal," "proposer," and "affected geographic area," respectively.
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A. BACKGROUND
1. Name of proposed project, if applicable:
VSM Plat
2. Name of applicant:
VSM
3. Address and phone number of applicant and contact person:
4. Date checklist prepared:
September 29, 2021
5. Agency requesting checklist:
City of Federal Way
6. Proposed timing or schedule (including phasing, if applicable):
Permitting: Fall 2021-Spring 2022
Construction: Spring/Summer 2022
7. Do you have any plans for future additions, expansion, or further activity related to or connected
with this proposal? If yes, explain.
There are no future additions, expansion, or further activity related to or connected with this
proposal anticipated at this time.
8. List any environmental information you know about that has been prepared, or will be prepared,
directly related to this proposal.
· Wetland Delineation and Rating Report – Evergreen Aquatic Resource Consultants, LLC
9. Do you know whether applications are pending for governmental approvals of other proposals
directly affecting the property covered by your proposal? If yes, explain.
There are no known applications pending for governmental approvals of other proposals directly
affecting the property covered by this proposal at this time.
Applicant
VSM
ATTN: Sikander Sekhon
PO Box 1226
Kent, WA 98035
206-412-9926
Contact Person
Encompass Engineering & Surveying
ATTN: Costa Philippides, PE
165 NE Juniper St. Suite 201
Issaquah, WA 98027
425-392-0250
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10. List any government approvals or permits that will be needed for your proposal, if known.
The required governmental approvals and permits include preliminary and final plat approval,
building, construction and construction stormwater permits, as well as administrative site plan
and SEPA review and determination will be required. Right-of-way permits will be needed if curb
cuts are needed for the driveways, and for various utility connections. Water and sewer developer
extensions from Lakehaven Utility District
11. Give brief, complete description of your proposal, including the proposed uses and the size of the
project and site. There are several questions later in this checklist that ask you to describe certain
aspects of your proposal. You do not need to repeat those answers on this page. (Lead agencies may
modify this form to include additional specific information on project description.)
The Applicant is requesting a subdivision permit for a Preliminary Plat. The subject site is
approximately 177,756 square feet (4.08 acres). The proposal is for an eleven (11) lots for single-
family residential use. The lots range in size from 7,205 to 10,727 square feet in size. There is a
Type Ns stream along with three Category IV wetlands on the western portion of the site. The
proposed development includes a Critical Area tract to meet the required stream and wetland
buffers and setbacks, as well as the open space requirements per the City of Federal Way Revised
Code. Access to Lot 1 will remain off S 298th Street and Lots 2-11 will be accessed via a new public
right-of-way located in the central/eastern portion of the project site.
12. Location of the proposal. Give sufficient information for a person to understand the precise location
of your proposed project, including a street address, if any, and section, township, and range, if
known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s).
Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available.
While you should submit any plans required by the agency, you are not required to duplicate maps
or detailed plans submitted with any permit applications related to this checklist.
· Address: 2625 and 2641 S 298th Street, Federal Way, WA 98003
· Tax Parcel #: 768380-0280, 768380-0290
· Section, Township, Range: SE 4-21-4
· Legal Description:
PARCEL B, CITY OF FEDERAL WAY BOUNDARY LINE ADJUSTMENT NO. 03-100726-00,
RECORDED UNDER RECORDING NO. 20030430900001, RECORDS OF KING COUNTY
AUDITOR;
SITUATE IN THE CITY OF FEDERAL WAY, COUNTY OF KING, STATE OF WASHINGTON.
TRACT 29, SECOMA SUBURBAN TRACTS, ACCORDING TO THE PLAT THEREOF, RECORDED IN
VOLUME 39 OF PLATS, PAGE 20, IN KING COUNTY, WASHINGTON; EXCEPT THE NORTH 155
FEET THEREOF; ALSO THE WEST 20 FEET OF THE NORTH 155 FEET OF SAID TRACT 29, LYING
NORTH OF THE NORTH LINE OF STEEL LAKE VILLAGE NO. 3, ACCORDING TO THE PLAT
THEREOF RECORDED IN VOLUME 80 OF PLATS, PAGE 49, IN KING COUNTY, WASHINGTON.
*Site Plan and Vicinity Map found in Attachment A.
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B. ENVIRONMENTAL ELEMENTS
1. EARTH
a. General description of the site (circle one): Flat, rolling, hilly, steep slopes, mountainous, other…
b. What is the steepest slope on the site (approximate percent slope)?
The steepest slope on site is approximately 18%.
c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If
you know the classification of agricultural soils, specify them and note any agricultural land of
long term commercial significance and whether the proposal results in removing any of these
soils.
Soils on the project site are classified as Alderwood gravelly sandy loam, 0 to 8 percent slopes
(AgB) and Arents, Alderwood material, 6 to 15 percent slopes (AmC) according to the National
Cooperative Soil Survey (please see Attachment B).
d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe.
There are no known surface indications or history of unstable soils in the immediate vicinity.
e. Describe the purpose, type, total area, and approximate quantities and total affected area of any
filling, excavation, and grading proposed. Indicate source of fill.
Grading and clearing of the project site is proposed to accommodate the improvement of the
new road and single-family residences. Approximately 12,700 cubic yards of cut and 6,000 cubic
yards of fill and 2,000 cubic yards of stripping material are anticipated for the project. The
receiving source of the extra material is unknown at this time but will be to an approved
location with an existing grading permit.
f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe.
Minor erosion is always possible with construction depending on weather conditions. Erosion
control measures will be put in place with construction to reduce these risks including a
Temporary Erosion and Sediment Control (TESC) plan providing Best Management Practices
during construction.
g. About what percent of the site will be covered with impervious surfaces after project construction
(for example, asphalt or buildings)?
Up to 60% of the project site would be covered by impervious surface per zoning. Exact
impervious coverage numbers will depend on the final building design.
h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any:
Implementation of Temporary Erosion and Sediment Control (TESC) and other Best
Management Practices (BMPs), as required by code, will be reviewed throughout the building
permit review process.
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2. AIR
a. What types of emissions to the air would result from the proposal during construction, operation,
and maintenance when the project is completed? If any, generally describe and give approximate
quantities if known.
Air emissions from construction vehicles are anticipated to be consistent with the machinery
typically used in single-family residential construction and are regulated by the Puget Sound
Clean Air Agency.
b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally
describe.
There are no known off-site sources of emissions or odor that may affect this proposal.
c. Proposed measures to reduce or control emissions or other impacts to air, if any:
There are no measures to reduce or control emissions or other impacts to air at this time. Each
building permit will be reviewed for compliance with current regulations.
3. WATER
a. Surface:
1) Is there any surface water body on or in the immediate vicinity of the site (including year-
round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and
provide names. If appropriate, state what stream or river it flows into.
A Type Ns stream and three small wetlands were identified and delineated in the western
portion of the site during the field investigation by Evergreen Aquatic Resource Consultants,
LLC. The wetlands meet the criteria for a Category IV wetland, which requires a 50-foot buffer
and 15-foot building setback, per Federal Way Revised Code 19.145.420. The Type Ns stream
requires a 35-foot buffer, along with a 15-foot building setback, per Federal Way Revised Code
19.145.270.
2) Will the project require any work over, in, or adjacent to (within 200 feet) the described
waters? If yes, please describe and attach available plans.
Yes, the project is proposed within 200 feet from the described Type Ns stream and Category
IV wetlands. The proposed plan includes leaving the western portion of the site, where the
stream and wetlands are located, undeveloped and located in a Critical Area tract.
3) Estimate the amount of fill and dredge material that would be placed in or removed from
surface water or wetlands and indicate the area of the site that would be affected. Indicate the
source of fill material.
No filled or dredged material is planned to be placed or removed from the wetlands or surface
water at this time.
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4) Will the proposal require surface water withdrawals or diversions? Give general description,
purpose, and approximate quantities if known.
No surface water withdrawals or diversions are proposed at this time.
5) Does the proposal lie within a 100-year flood plain? If so, note location on the site plan.
The project site does not lie within a FEMA 100-year floodplain, per the FEMA Flood Map
Service Center. The flood map for the project site is number 53033C1235G, effective
08/19/2020.
6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe
the type of waste and anticipated volume of discharge.
The proposal does not involve any discharge of waste materials to surface waters at this time.
b. Ground:
1) Will groundwater be withdrawn from a well for drinking water or other purposes? If so, give a
general description of the well, proposed uses and approximate quantities withdrawn from the
well? Will water be discharged to groundwater? Give general description, purpose, and
approximate quantities if known.
No groundwater will be withdrawn from a well for drinking water or other purposes. No
discharge to groundwater is proposed at this time.
2) Describe waste material that will be discharged into the ground from septic tanks or other
sources, if any (for example: Domestic sewage; industrial, containing the following chemicals...;
agricultural; etc.). Describe the general size of the system, the number of such systems, the
number of houses to be served (if applicable), or the number of animals or humans the system(s)
are expected to serve.
No discharge of waste materials into the ground is proposed at this time.
c. Water Runoff (including stormwater):
1) Describe the source of runoff (including stormwater) and method of collection and disposal,
if any (include quantities, if known). Where will this water flow? Will this water flow into other
waters? If so, describe.
Stormwater runoff from roofs, roadways and other impervious surfaces will be collected using
gutters and standard catch basins and conveyed to a storm detention pond. Stormwater prior
to entering the detention pond will pass through a water quality treatment system. After
being detained in the pond, stormwater will be discharge using a dispersion trench, into the
wetland buffer, where it will make its way to the Type Ns stream.
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2) Could waste materials enter ground or surface waters? If so, generally describe.
No waste materials are anticipated to enter the ground or surface waters. Runoff from all
pollution-generating surfaces (i.e., driveway) will be treated for water quality prior to entering
the pond and being discharge to the existing wetland and type Ns stream on the western side
of the site.
3) Does the proposal alter or otherwise affect drainage patterns in the vicinity of the site? If so,
describe.
The project does not propose to alter or otherwise affect drainage patterns. The drainage
patterns will match that of the existing condition.
4) Proposed measures to reduce or control surface, ground, runoff water, and drainage pattern
impacts, if any:
A detention pond will be constructed to mitigate runoff from all new/replaced impervious
surfaces associated with the plat.
4. PLANTS
a. Check the types of vegetation found on the site:
_X_ Deciduous tree: Alder, maple, aspen, other
_X_ Evergreen tree: Fir, cedar, pine, other
_X_ Shrubs
_X_ Grass
_X_ Pasture
___ Crop or grain
___ Orchards, vineyards or other permanent crops.
_X_ Wet soil plants: Cattail, buttercup, bullrush, skunk cabbage, other
___ Water plants: Water lily, eelgrass, milfoil, other
___ Other types of vegetation
b. What kind and amount of vegetation will be removed or altered?
Vegetation removal will be the minimum necessary to construct the proposed single-family
residences, as determined by the applicable development requirements found in the Federal
Way Revised Code.
c. List threatened and endangered species known to be on or near the site.
There are no known threatened or endangered species on or near the site.
d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation
on the site, if any:
The final Landscape Plan will be consistent with Federal Way Revised Code Chapter 19 in an
effort to protect the existing vegetation.
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e. List all noxious weeds and invasive species known to be on or near the site.
Common invasives are suspected to be onsite.
5. ANIMALS
a. List any birds and other animals which have been observed on or near the site or are known to be
on or near the site. Examples include:
Birds: Hawk, heron, eagle, songbirds, other:
Mammals: Deer, bear, elk, beaver, other:
Fish: Bass, salmon, trout, herring, shellfish, other:
b. List any threatened and endangered species known to be on or near the site.
There are no threatened or endangered species known to be on or near the site.
c. Is the site part of a migration route? If so, explain.
There are no known migration routes on the site. Generally, Western Washington is part of the
Pacific Flyaway.
d. Proposed measures to preserve or enhance wildlife, if any:
There are no measures to preserve or enhance wildlife proposed at this time.
e. List any invasive animal species known to be on or near the site.
There are no known invasive animal species on or near the site.
6. ENERGY AND NATURAL RESOURCES
a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the
completed project's energy needs? Describe whether it will be used for heating, manufacturing,
etc.
Energy use will be consistent with typical single-family residences as well as the machinery used
during construction.
b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally
describe.
It is not anticipated that this project would affect the potential use of solar energy by adjacent
properties.
c. What kinds of energy conservation features are included in the plans of this proposal? List other
proposed measures to reduce or control energy impacts, if any:
There are no energy conservation features included in the plans of this proposal at this time.
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7. ENVIRONMENTAL HEALTH
a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and
explosion, spill, or hazardous waste, that could occur as a result of this proposal? If so, describe.
There are no known environmental health hazards that could occur as a result of this proposal.
1) Describe any known or possible contamination at the site from present or past uses.
There is no known contamination at the site from present or past uses.
2) Describe existing hazardous chemicals/conditions that might affect project development and
design. This includes underground hazardous liquid and gas transmission pipelines located
within the project area and in the vicinity.
There are no known existing hazardous chemicals/conditions that might affect project
development and design.
3) Describe any toxic or hazardous chemicals that might be stored, used, or produced during the
project's development or construction, or at any time during the operating life of the project.
There are no known toxic or hazardous chemicals that might be stored, used, or produced
during the project’s development or construction at any time during the life of the project.
4) Describe special emergency services that might be required.
There are no special emergency services anticipated to be required at this time beyond what
is consistent with those typical of a residential neighborhood.
5) Proposed measures to reduce or control environmental health hazards, if any:
There are no proposed measures to reduce or control environmental health hazards at this
time.
b. Noise
1) What types of noise exist in the area which may affect your project (for example: traffic,
equipment, operation, other)?
Existing noise is that which is typical to a residential neighborhood.
2) What types and levels of noise would be created by or associated with the project on a short-
term or a long-term basis (for example: traffic, construction, operation, other)? Indicate what
hours noise would come from the site.
Typical noise from construction vehicles is anticipated on a short-term basis during project
construction.
3) Proposed measures to reduce or control noise impacts, if any:
Construction hours will be limited to what is required by the City of Federal Way. There are
no additional measures to reduce or control noise impacts proposed at this time.
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8. LAND AND SHORELINE USE
a. What is the current use of the site and adjacent properties? Will the proposal affect current land
uses on nearby or adjacent properties? If so, describe.
The proposal will remain consistent with the current and neighboring properties’ land use. The
project site consists of two (2) existing single-family residence and associated outbuildings. The
adjacent lots are also all zoned RS 7.2 and have single-family dwelling units onsite as well.
b. Has the project site been used as working farmlands or working forest lands? If so, describe. How
much agricultural or forest land of long-term commercial significance will be converted to other
uses as a result of the proposal, if any? If resource lands have not been designated, how many
acres in farmland or forest land tax status will be converted to nonfarm or nonforest use?
A review of King County’s iMap aerial imagery shows no record of the project site being used as
a working farmland or working forest land.
1) Will the proposal affect or be affected by surrounding working farm or forest land normal
business operations, such as oversize equipment access, the application of pesticides, tilling, and
harvesting? If so, how:
No, the subject site is part of the Comprehensive Plan’s Single-Family High-Density
designation and is surrounded by single-family residences.
c. Describe any structures on the site.
There are two existing single-family residences with associated outbuildings. The existing house
on the northern boundary of the property (2625 S 298th Street) was constructed in 2003. It is a
2,970 square foot, 3 bedrooms, 2 bath house. Per the King County Assessor’s website, the home
has a grade of 8-Good and its condition is Average. The house located on the eastern portion
of the site (2641 S 298th Street) was constructed in 1953 and is a 2,310 square foot, 3 bedroom,
1 bath home with a grade of 7-Average in Good condition, per the Assessor’s website.
d. Will any structures be demolished? If so, what?
The Applicant is proposing to retain the house located at 2625 S 298th Street, modifying the
garage to work with the proposal and demolish the existing home located at 2641 S 298th Street.
The outbuildings throughout the subject site are also proposed to be removed.
e. What is the current zoning classification of the site?
The project site is zoned RS 7.2, which allows development of one (1) dwelling unit per 7,200
square feet with a minimum lot size of 7,200 square feet.
f. What is the current comprehensive plan designation of the site?
Single-Family High-Density
g. If applicable, what is the current shoreline master program designation of the site?
Not applicable.
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h. Has any part of the site been classified as a critical area by the city or county? If so, specify.
The City’s Critical Areas Map identifies wetland and critical fish and wildlife habitat areas on the
subject property.
i. Approximately how many people would reside or work in the completed project?
According to Federal Way’s average household size, 2.72, approximately 30 people are expected
to reside in the completed project’s dwelling units (US Census Bureau, QuickFacts, July 1, 2019).
j. Approximately how many people would the completed project displace?
This project includes retaining one (1) of the two (2) existing homes, therefore an estimate of
2-3 people would be displaced during the development.
k. Proposed measures to avoid or reduce displacement impacts, if any:
There are no proposed measures to avoid or reduce displacement impacts at this time.
l. Proposed measures to ensure the proposal is compatible with existing and projected land uses
and plans, if any:
The proposal will meet density, dimension and design requirements of the underlying zoning to
be compatible with existing and projected land uses.
m. Proposed measures to reduce or control impacts to agricultural and forest lands of long-term
commercial significance, if any:
Does not apply.
9. HOUSING
a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-
income housing.
The project seeks to subdivide the property into eleven (11) lots for single-family residential
use. Consistent with neighboring properties, the constructed homes would be middle-income
housing.
b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or
low-income housing.
The project proposes to demolish one (1) of the two (2) existing middle-income homes.
c. Proposed measures to reduce or control housing impacts, if any:
There are no measures to reduce or control housing impacts proposed at this time.
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10. Aesthetics
a. What is the tallest height of any proposed structure(s), not including antennas; what is the
principal exterior building material(s) proposed?
Pursuant to Federal Way Revised Code, the maximum height is 30-feet above average building
elevation.
b. What views in the immediate vicinity would be altered or obstructed?
There are no known views in the immediate vicinity that would be altered or obstructed.
c. Proposed measures to reduce or control aesthetic impacts, if any:
There are no measures to reduce or control aesthetic impacts proposed at this time.
11. LIGHT AND GLARE
a. What type of light or glare will the proposal produce? What time of day would it mainly occur?
There is a potential of glare from windows, which will be consistent with that of single-family
residence. All outdoor lighting on homes will be directed downward and shielded to minimize
glare.
b. Could light or glare from the finished project be a safety hazard or interfere with views?
It is not anticipated that the finished project could be a safety hazard or interfere with views.
c. What existing offsite sources of light or glare may affect your proposal?
Light from vehicular traffic on area roadways would be present but would not be anticipated to
affect the proposed project.
d. Proposed measures to reduce or control light and glare impacts, if any:
No measures are proposed to reduce or control light and glare aside from the requirements of
the Federal Way Revised Code.
12. RECREATION
a. What designated and informal recreational opportunities are in the immediate vicinity?
A number of parks and outdoor recreational opportunities are within the vicinity of the
proposal including Wildwood Park (0.4 miles away), Laurelwood Park (1.1 miles away) and Steel
Lake Park (approximately 1.2 miles away).
b. Would the proposed project displace any existing recreational uses? If so, describe.
No, the project site consists of an existing single-family dwelling units on a lot zoned RS 7.2 with
no zoning or land use designation changes proposed.
c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities
to be provided by the project or applicant, if any:
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There are no measures to reduce or control impacts on recreation proposed at this time.
13. HISTORIC AND CULTURAL PRESERVATION
a. Are there any buildings, structures, or sites, located on or near the site that are over 45 years old
listed in or eligible for listing in national, state, or local preservation registers? If so, specifically
describe.
There are no known buildings, structures or sites located on or near the site that are listed in or
eligible for listing in national, state, or local preservation registers per the Department of
Archaeology and Historical Preservation’s WISAARD mapping tool.
b. Are there any landmarks, features, or other evidence of Indian or historic use or occupation? This
may include human burials or old cemeteries. Are there any material evidence, artifacts, or areas
of cultural importance on or near the site? Please list any professional studies conducted at the
site to identify such resources.
There are no known landmarks, features, evidence of Indian/historic use/occupation, material
evidence, artifacts, or areas of cultural importance located at or near the site.
c. Describe the methods used to assess the potential impacts to cultural and historic resources on
or near the project site. Examples include consultation with tribes and the department of
archeology and historic preservation, archaeological surveys, historic maps, GIS data, etc.
The Department of Archeology and Historical Preservation’s WISAARD mapping tool does not
have the project site mapped as including landmarks, features or other evidence of Indian or
historic use or occupation. If any indications are discovered during construction, work will stop
immediately, and the appropriate authorities will be notified.
d. Proposed measures to avoid, minimize, or compensate for loss, changes to, and disturbance to
resources. Please include plans for the above and any permits that may be required.
There are no additional measures to avoid, minimize, or compensate for loss, changes to, and
disturbance to resources proposed at this time as no historical properties have been identified
in the immediate vicinity of the proposal.
14. TRANSPORTATION
a. Identify public streets and highways serving the site or affected geographic area, and describe
proposed access to the existing street system. Show on site plans, if any.
Site access for Lot 1 will be via the existing driveway off S 298th Street serving 2625 S 298th Street.
The project will construct a new public street to provide access for the remaining ten (10) lots.
The new street will be a Type W Street with a 52-foot right-of-way and a cul-de-sac terminus
that will connect to S 298th Street and the rest of the public street system.
b. Is the site or affected geographic area currently served by public transit? If so, generally describe.
If not, what is the approximate distance to the nearest transit stop?
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The nearest transit stop is located approximately 0.5 miles away at S 304th Street and Military
Road S where it is served by metro line 183.
c. How many additional parking spaces would the completed project or nonproject proposal have?
How many would the project or proposal eliminate?
Two (2) parking places are proposed per dwelling unit. The only parking being eliminated is
associated with the single family that is being demolished. Additionally, the City’s Type W
street cross section allows for on street parking along both sides of the street, however, at this
time the total number of available parking along the street is unknown.
d. Will the proposal require any new or improvements to existing roads, streets, pedestrian, bicycle
or state transportation facilities, not including driveways? If so, generally describe (indicate
whether public or private).
The proposal includes the construction of a new public street which consists of a paved
roadway, planter strips, sidewalks and streetlights. On S 298th, frontage improvements will be
made in front of Lot 1 as well as construction of the new road access.
e. Will the project or proposal use (or occur in the immediate vicinity of) water, rail, or air
transportation? If so, generally describe.
The project is not in the immediate vicinity of water, rail or air transportation.
f. How many vehicular trips per day would be generated by the completed project or proposal? If
known, indicate when peak volumes would occur and what percentage of the volume would be
trucks (such as commercial and nonpassenger vehicles). What data or transportation models were
used to make these estimates?
Approximately 16 new AM peak hour trips and 12 new weekday PM peak hour trips and 113
daily weekday trips are expected to be generated by the net nine (9) proposed single-family
dwelling unit per the Institute of Transportation Engineers (ITE) Trip Generation – 10th Edition,
land use code 210 (Single-Family Detached Housing).
g. Will the proposal interfere with, affect or be affected by the movement of agricultural and forest
products on roads or streets in the area? If so, generally describe.
The proposal will not interfere with, affect or be affected by the movement of agricultural and
forest products on roads or streets in the area.
h. Proposed measures to reduce or control transportation impacts, if any:
There are no measures to reduce or control transportation impacts proposed or needed at this
time. Transportation impact fees may apply and will be paid accordingly.
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15. PUBLIC SERVICES
a. Would the project result in an increased need for public services (for example: Fire protection,
police protection, public transit, health care, schools, other)? If so, generally describe.
This project will result in an increased need for public services due to the net nine (9) new single-
family dwelling units proposed. The appropriate impact fees will be paid addressing these
concerns.
b. Proposed measures to reduce or control direct impacts on public services, if any.
There are no measures to reduce or control direct impacts on public services proposed at this
time. Impact fees may be applicable and will be paid accordingly.
16. UTILITIES
a. Circle utilities currently available at the site: Electricity, natural gas, water, refuse service,
telephone, sanitary sewer, septic system, other.
b. Describe the utilities that are proposed for the project, the utility providing the service, and the
general construction activities on the site or in the immediate vicinity which might be needed.
Water and sewer utilities will be provided by Lakehaven Water and Sewer District. Electric
power and natural gas will be supplied by Puget Sound Energy.
C. SIGNATURE
The above answers are true and complete to the best of my knowledge. I understand that the lead
agency is relying on them to make its decision.
Signature: __________________________________
COSTA PHILIPPIDES, PE
ENCOMPASS ENGINEERING & SURVEYING
Date Submitted:____September 29th, 2021____________
[Statutory Authority: RCW 43.21C.110. WSR 16-13-012 (Order 15-09), § 197-11-960, filed 6/2/16,
effective 7/3/16. Statutory Authority: RCW 43.21C.110 and 43.21C.100 [43.21C.170]. WSR 14-09-
026 (Order 13-01), § 197-11-960, filed 4/9/14, effective 5/10/14. Statutory Authority: RCW
43.21C.110. WSR 13-02-065 (Order 12-01), § 197-11-960, filed 12/28/12, effective 1/28/13; WSR 84-
05-020 (Order DE 83-39), § 197-11-960, filed 2/10/84, effective 4/4/84.]
WAC 197-11-960 SEPA Environmental Checklist Page | 16
ATTACHMENT A
SITE PLAN AND VICINITY MAP
LOT 9LOT 10LOT 11LOT 8LOT 1LOT 2LOT 7LOT 6LOT 5TRACT BSTORMWATERLOT 4TRACT CWETLANDLOT 3LOT 170S 298TH STΔWETLAND AWETLAND BWETLAND CCURVE TABLELINE TABLESHEETAPPROVEDCHECKEDDRAWNDESIGNEDSCALEDATEJOB NO.REVISIONSEncompass
Eastern Washington Division
407 Swiftwater Blvd. ▪ Cle Elum, WA 98922 ▪ Phone: (509) 674-7433
Western Washington Division
165 NE Juniper Street, Suite 201 ▪ Issaquah, WA 98027 ▪ Phone: (425) 392-0250
ENGINEERING & SURVEYINGKnow what'sCallbelow.before you dig.RVSM PLATNW 1/4 OF SE 1/4 OF SECTION 4, T. 21 N., R. 4 E., W.M.CITY OF FEDERAL WAY, KING COUNTY, STATE OF WASHINGTONLEGAL DESCRIPTIONHORIZONTAL DATUM:BASIS OF BEARINGS:VERTICAL DATUM:BENCHMARKS:SPECIAL EXCEPTIONS:PROJECT TEAM:SITE DATA:VICINITY MAPPROJECT SITEEXISTING UTILITY NOTE:SURVEY LEGEND:1VSM SHORT PLAT
COVER SHEET AND HORIZONTAL CONTROL
VSMSHEET INDEX:TITLESHEETCOVER SHEET AND HORIZONTAL CONTROL1NOTES AND ROAD SECTION2EXISTING CONDITIONS3TESC, DEMOLITION & TREE RETENTION PLAN4TESC DETAILS5ROAD AND STORM DRAINAGE PLAN6ROAD AND STORM PROFILE7SEWER AND WATER PLAN8POND AND SECTIONS9STORM DETAILS10CONSTRUCTION DETAILS11CONSTRUCTION DETAILS12CONSTRUCTION DETAILS13NORTH
WAC 197-11-960 SEPA Environmental Checklist Page | 17
ATTACHMENT B
SOIL SURVEY
United States
Department of
Agriculture
A product of the National
Cooperative Soil Survey,
a joint effort of the United
States Department of
Agriculture and other
Federal agencies, State
agencies including the
Agricultural Experiment
Stations, and local
participants
Custom Soil Resource
Report for
King County
Area,
Washington
Natural
Resources
Conservation
Service
August 17, 2021
Preface
Soil surveys contain information that affects land use planning in survey areas.
They highlight soil limitations that affect various land uses and provide information
about the properties of the soils in the survey areas. Soil surveys are designed for
many different users, including farmers, ranchers, foresters, agronomists, urban
planners, community officials, engineers, developers, builders, and home buyers.
Also, conservationists, teachers, students, and specialists in recreation, waste
disposal, and pollution control can use the surveys to help them understand,
protect, or enhance the environment.
Various land use regulations of Federal, State, and local governments may impose
special restrictions on land use or land treatment. Soil surveys identify soil
properties that are used in making various land use or land treatment decisions.
The information is intended to help the land users identify and reduce the effects of
soil limitations on various land uses. The landowner or user is responsible for
identifying and complying with existing laws and regulations.
Although soil survey information can be used for general farm, local, and wider area
planning, onsite investigation is needed to supplement this information in some
cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/
portal/nrcs/main/soils/health/) and certain conservation and engineering
applications. For more detailed information, contact your local USDA Service Center
(https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil
Scientist (http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/?
cid=nrcs142p2_053951).
Great differences in soil properties can occur within short distances. Some soils are
seasonally wet or subject to flooding. Some are too unstable to be used as a
foundation for buildings or roads. Clayey or wet soils are poorly suited to use as
septic tank absorption fields. A high water table makes a soil poorly suited to
basements or underground installations.
The National Cooperative Soil Survey is a joint effort of the United States
Department of Agriculture and other Federal agencies, State agencies including the
Agricultural Experiment Stations, and local agencies. The Natural Resources
Conservation Service (NRCS) has leadership for the Federal part of the National
Cooperative Soil Survey.
Information about soils is updated periodically. Updated information is available
through the NRCS Web Soil Survey, the site for official soil survey information.
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its
programs and activities on the basis of race, color, national origin, age, disability,
and where applicable, sex, marital status, familial status, parental status, religion,
sexual orientation, genetic information, political beliefs, reprisal, or because all or a
part of an individual's income is derived from any public assistance program. (Not
all prohibited bases apply to all programs.) Persons with disabilities who require
2
alternative means for communication of program information (Braille, large print,
audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice
and TDD). To file a complaint of discrimination, write to USDA, Director, Office of
Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or
call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity
provider and employer.
3
Contents
Preface....................................................................................................................2
How Soil Surveys Are Made..................................................................................5
Soil Map..................................................................................................................8
Soil Map................................................................................................................9
Legend................................................................................................................10
Map Unit Legend................................................................................................11
Map Unit Descriptions.........................................................................................11
King County Area, Washington.......................................................................13
AgB—Alderwood gravelly sandy loam, 0 to 8 percent slopes.....................13
AmC—Arents, Alderwood material, 6 to 15 percent slopes........................14
References............................................................................................................16
4
How Soil Surveys Are Made
Soil surveys are made to provide information about the soils and miscellaneous
areas in a specific area. They include a description of the soils and miscellaneous
areas and their location on the landscape and tables that show soil properties and
limitations affecting various uses. Soil scientists observed the steepness, length,
and shape of the slopes; the general pattern of drainage; the kinds of crops and
native plants; and the kinds of bedrock. They observed and described many soil
profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The
profile extends from the surface down into the unconsolidated material in which the
soil formed or from the surface down to bedrock. The unconsolidated material is
devoid of roots and other living organisms and has not been changed by other
biological activity.
Currently, soils are mapped according to the boundaries of major land resource
areas (MLRAs). MLRAs are geographically associated land resource units that
share common characteristics related to physiography, geology, climate, water
resources, soils, biological resources, and land uses (USDA, 2006). Soil survey
areas typically consist of parts of one or more MLRA.
The soils and miscellaneous areas in a survey area occur in an orderly pattern that
is related to the geology, landforms, relief, climate, and natural vegetation of the
area. Each kind of soil and miscellaneous area is associated with a particular kind
of landform or with a segment of the landform. By observing the soils and
miscellaneous areas in the survey area and relating their position to specific
segments of the landform, a soil scientist develops a concept, or model, of how they
were formed. Thus, during mapping, this model enables the soil scientist to predict
with a considerable degree of accuracy the kind of soil or miscellaneous area at a
specific location on the landscape.
Commonly, individual soils on the landscape merge into one another as their
characteristics gradually change. To construct an accurate soil map, however, soil
scientists must determine the boundaries between the soils. They can observe only
a limited number of soil profiles. Nevertheless, these observations, supplemented
by an understanding of the soil-vegetation-landscape relationship, are sufficient to
verify predictions of the kinds of soil in an area and to determine the boundaries.
Soil scientists recorded the characteristics of the soil profiles that they studied. They
noted soil color, texture, size and shape of soil aggregates, kind and amount of rock
fragments, distribution of plant roots, reaction, and other features that enable them
to identify soils. After describing the soils in the survey area and determining their
properties, the soil scientists assigned the soils to taxonomic classes (units).
Taxonomic classes are concepts. Each taxonomic class has a set of soil
characteristics with precisely defined limits. The classes are used as a basis for
comparison to classify soils systematically. Soil taxonomy, the system of taxonomic
classification used in the United States, is based mainly on the kind and character
of soil properties and the arrangement of horizons within the profile. After the soil
5
scientists classified and named the soils in the survey area, they compared the
individual soils with similar soils in the same taxonomic class in other areas so that
they could confirm data and assemble additional data based on experience and
research.
The objective of soil mapping is not to delineate pure map unit components; the
objective is to separate the landscape into landforms or landform segments that
have similar use and management requirements. Each map unit is defined by a
unique combination of soil components and/or miscellaneous areas in predictable
proportions. Some components may be highly contrasting to the other components
of the map unit. The presence of minor components in a map unit in no way
diminishes the usefulness or accuracy of the data. The delineation of such
landforms and landform segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, onsite
investigation is needed to define and locate the soils and miscellaneous areas.
Soil scientists make many field observations in the process of producing a soil map.
The frequency of observation is dependent upon several factors, including scale of
mapping, intensity of mapping, design of map units, complexity of the landscape,
and experience of the soil scientist. Observations are made to test and refine the
soil-landscape model and predictions and to verify the classification of the soils at
specific locations. Once the soil-landscape model is refined, a significantly smaller
number of measurements of individual soil properties are made and recorded.
These measurements may include field measurements, such as those for color,
depth to bedrock, and texture, and laboratory measurements, such as those for
content of sand, silt, clay, salt, and other components. Properties of each soil
typically vary from one point to another across the landscape.
Observations for map unit components are aggregated to develop ranges of
characteristics for the components. The aggregated values are presented. Direct
measurements do not exist for every property presented for every map unit
component. Values for some properties are estimated from combinations of other
properties.
While a soil survey is in progress, samples of some of the soils in the area generally
are collected for laboratory analyses and for engineering tests. Soil scientists
interpret the data from these analyses and tests as well as the field-observed
characteristics and the soil properties to determine the expected behavior of the
soils under different uses. Interpretations for all of the soils are field tested through
observation of the soils in different uses and under different levels of management.
Some interpretations are modified to fit local conditions, and some new
interpretations are developed to meet local needs. Data are assembled from other
sources, such as research information, production records, and field experience of
specialists. For example, data on crop yields under defined levels of management
are assembled from farm records and from field or plot experiments on the same
kinds of soil.
Predictions about soil behavior are based not only on soil properties but also on
such variables as climate and biological activity. Soil conditions are predictable over
long periods of time, but they are not predictable from year to year. For example,
soil scientists can predict with a fairly high degree of accuracy that a given soil will
have a high water table within certain depths in most years, but they cannot predict
that a high water table will always be at a specific level in the soil on a specific date.
After soil scientists located and identified the significant natural bodies of soil in the
survey area, they drew the boundaries of these bodies on aerial photographs and
Custom Soil Resource Report
6
identified each as a specific map unit. Aerial photographs show trees, buildings,
fields, roads, and rivers, all of which help in locating boundaries accurately.
Custom Soil Resource Report
7
Soil Map
The soil map section includes the soil map for the defined area of interest, a list of
soil map units on the map and extent of each map unit, and cartographic symbols
displayed on the map. Also presented are various metadata about data used to
produce the map, and a description of each soil map unit.
8
9
Custom Soil Resource Report
Soil Map
524244052424605242480524250052425205242540524256052425805242600524262052426405242660524244052424605242480524250052425205242540524256052425805242600524262052426405242660552880 552900 552920 552940 552960 552980 553000 553020 553040
552880 552900 552920 552940 552960 552980 553000 553020 553040
47° 20' 7'' N 122° 18' 0'' W47° 20' 7'' N122° 17' 52'' W47° 19' 59'' N
122° 18' 0'' W47° 19' 59'' N
122° 17' 52'' WN
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 10N WGS84
0 50 100 200 300
Feet
0 15 30 60 90
Meters
Map Scale: 1:1,150 if printed on A portrait (8.5" x 11") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special Point Features
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
Gravelly Spot
Landfill
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
Sodic Spot
Spoil Area
Stony Spot
Very Stony Spot
Wet Spot
Other
Special Line Features
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: King County Area, Washington
Survey Area Data: Version 16, Jun 4, 2020
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Jul 6, 2020—Jul 20,
2020
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
Custom Soil Resource Report
10
Map Unit Legend
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
AgB Alderwood gravelly sandy loam,
0 to 8 percent slopes
1.8 44.7%
AmC Arents, Alderwood material, 6 to
15 percent slopes
2.3 55.3%
Totals for Area of Interest 4.1 100.0%
Map Unit Descriptions
The map units delineated on the detailed soil maps in a soil survey represent the
soils or miscellaneous areas in the survey area. The map unit descriptions, along
with the maps, can be used to determine the composition and properties of a unit.
A map unit delineation on a soil map represents an area dominated by one or more
major kinds of soil or miscellaneous areas. A map unit is identified and named
according to the taxonomic classification of the dominant soils. Within a taxonomic
class there are precisely defined limits for the properties of the soils. On the
landscape, however, the soils are natural phenomena, and they have the
characteristic variability of all natural phenomena. Thus, the range of some
observed properties may extend beyond the limits defined for a taxonomic class.
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is made
up of the soils or miscellaneous areas for which it is named and some minor
components that belong to taxonomic classes other than those of the major soils.
Most minor soils have properties similar to those of the dominant soil or soils in the
map unit, and thus they do not affect use and management. These are called
noncontrasting, or similar, components. They may or may not be mentioned in a
particular map unit description. Other minor components, however, have properties
and behavioral characteristics divergent enough to affect use or to require different
management. These are called contrasting, or dissimilar, components. They
generally are in small areas and could not be mapped separately because of the
scale used. Some small areas of strongly contrasting soils or miscellaneous areas
are identified by a special symbol on the maps. If included in the database for a
given area, the contrasting minor components are identified in the map unit
descriptions along with some characteristics of each. A few areas of minor
components may not have been observed, and consequently they are not
mentioned in the descriptions, especially where the pattern was so complex that it
was impractical to make enough observations to identify all the soils and
miscellaneous areas on the landscape.
The presence of minor components in a map unit in no way diminishes the
usefulness or accuracy of the data. The objective of mapping is not to delineate
pure taxonomic classes but rather to separate the landscape into landforms or
landform segments that have similar use and management requirements. The
delineation of such segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, however,
Custom Soil Resource Report
11
onsite investigation is needed to define and locate the soils and miscellaneous
areas.
An identifying symbol precedes the map unit name in the map unit descriptions.
Each description includes general facts about the unit and gives important soil
properties and qualities.
Soils that have profiles that are almost alike make up a soil series. Except for
differences in texture of the surface layer, all the soils of a series have major
horizons that are similar in composition, thickness, and arrangement.
Soils of one series can differ in texture of the surface layer, slope, stoniness,
salinity, degree of erosion, and other characteristics that affect their use. On the
basis of such differences, a soil series is divided into soil phases. Most of the areas
shown on the detailed soil maps are phases of soil series. The name of a soil phase
commonly indicates a feature that affects use or management. For example, Alpha
silt loam, 0 to 2 percent slopes, is a phase of the Alpha series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes, associations, or undifferentiated groups.
A complex consists of two or more soils or miscellaneous areas in such an intricate
pattern or in such small areas that they cannot be shown separately on the maps.
The pattern and proportion of the soils or miscellaneous areas are somewhat similar
in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example.
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps. Because of present
or anticipated uses of the map units in the survey area, it was not considered
practical or necessary to map the soils or miscellaneous areas separately. The
pattern and relative proportion of the soils or miscellaneous areas are somewhat
similar. Alpha-Beta association, 0 to 2 percent slopes, is an example.
An undifferentiated group is made up of two or more soils or miscellaneous areas
that could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and proportion
of the soils or miscellaneous areas in a mapped area are not uniform. An area can
be made up of only one of the major soils or miscellaneous areas, or it can be made
up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example.
Some surveys include miscellaneous areas. Such areas have little or no soil
material and support little or no vegetation. Rock outcrop is an example.
Custom Soil Resource Report
12
King County Area, Washington
AgB—Alderwood gravelly sandy loam, 0 to 8 percent slopes
Map Unit Setting
National map unit symbol: 2t625
Elevation: 50 to 800 feet
Mean annual precipitation: 25 to 60 inches
Mean annual air temperature: 48 to 52 degrees F
Frost-free period: 160 to 240 days
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Alderwood and similar soils:85 percent
Minor components:15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Alderwood
Setting
Landform:Ridges, hills
Landform position (two-dimensional):Summit
Landform position (three-dimensional):Crest, talf
Down-slope shape:Linear, convex
Across-slope shape:Convex
Parent material:Glacial drift and/or glacial outwash over dense glaciomarine
deposits
Typical profile
A - 0 to 7 inches: gravelly sandy loam
Bw1 - 7 to 21 inches: very gravelly sandy loam
Bw2 - 21 to 30 inches: very gravelly sandy loam
Bg - 30 to 35 inches: very gravelly sandy loam
2Cd1 - 35 to 43 inches: very gravelly sandy loam
2Cd2 - 43 to 59 inches: very gravelly sandy loam
Properties and qualities
Slope:0 to 8 percent
Depth to restrictive feature:20 to 39 inches to densic material
Drainage class:Moderately well drained
Capacity of the most limiting layer to transmit water (Ksat):Very low to moderately
low (0.00 to 0.06 in/hr)
Depth to water table:About 18 to 37 inches
Frequency of flooding:None
Frequency of ponding:None
Available water supply, 0 to 60 inches: Very low (about 2.7 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 4s
Hydrologic Soil Group: B
Forage suitability group: Limited Depth Soils (G002XN302WA), Limited Depth
Soils (G002XF303WA), Limited Depth Soils (G002XS301WA)
Other vegetative classification: Limited Depth Soils (G002XN302WA), Limited
Depth Soils (G002XF303WA), Limited Depth Soils (G002XS301WA)
Custom Soil Resource Report
13
Hydric soil rating: No
Minor Components
Everett
Percent of map unit:5 percent
Landform:Kames, eskers, moraines
Landform position (two-dimensional):Summit, shoulder
Landform position (three-dimensional):Crest, interfluve
Down-slope shape:Convex
Across-slope shape:Convex
Hydric soil rating: No
Mckenna
Percent of map unit:5 percent
Landform:Depressions, drainageways
Landform position (three-dimensional):Dip
Down-slope shape:Concave, linear
Across-slope shape:Concave
Hydric soil rating: Yes
Shalcar
Percent of map unit:3 percent
Landform:Depressions
Landform position (three-dimensional):Dip
Down-slope shape:Concave
Across-slope shape:Concave
Hydric soil rating: Yes
Norma
Percent of map unit:2 percent
Landform:Depressions, drainageways
Landform position (three-dimensional):Dip
Down-slope shape:Concave, linear
Across-slope shape:Concave
Hydric soil rating: Yes
AmC—Arents, Alderwood material, 6 to 15 percent slopes
Map Unit Setting
National map unit symbol: 1hmsq
Elevation: 50 to 660 feet
Mean annual precipitation: 35 to 60 inches
Mean annual air temperature: 50 degrees F
Frost-free period: 150 to 200 days
Farmland classification: Not prime farmland
Map Unit Composition
Arents, alderwood material, and similar soils:100 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Custom Soil Resource Report
14
Description of Arents, Alderwood Material
Setting
Landform:Till plains
Parent material:Basal till
Typical profile
H1 - 0 to 26 inches: gravelly sandy loam
H2 - 26 to 60 inches: very gravelly sandy loam
Properties and qualities
Slope:6 to 15 percent
Depth to restrictive feature:20 to 40 inches to densic material
Drainage class:Moderately well drained
Capacity of the most limiting layer to transmit water (Ksat):Very low to moderately
low (0.00 to 0.06 in/hr)
Depth to water table:About 16 to 36 inches
Frequency of flooding:None
Frequency of ponding:None
Available water supply, 0 to 60 inches: Very low (about 2.3 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 4s
Hydrologic Soil Group: B/D
Hydric soil rating: No
Custom Soil Resource Report
15
References
American Association of State Highway and Transportation Officials (AASHTO).
2004. Standard specifications for transportation materials and methods of sampling
and testing. 24th edition.
American Society for Testing and Materials (ASTM). 2005. Standard classification of
soils for engineering purposes. ASTM Standard D2487-00.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of
wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife
Service FWS/OBS-79/31.
Federal Register. July 13, 1994. Changes in hydric soils of the United States.
Federal Register. September 18, 2002. Hydric soils of the United States.
Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric
soils in the United States.
National Research Council. 1995. Wetlands: Characteristics and boundaries.
Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service.
U.S. Department of Agriculture Handbook 18. http://www.nrcs.usda.gov/wps/portal/
nrcs/detail/national/soils/?cid=nrcs142p2_054262
Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for
making and interpreting soil surveys. 2nd edition. Natural Resources Conservation
Service, U.S. Department of Agriculture Handbook 436. http://
www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053577
Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of
Agriculture, Natural Resources Conservation Service. http://
www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053580
Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and
Delaware Department of Natural Resources and Environmental Control, Wetlands
Section.
United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of
Engineers wetlands delineation manual. Waterways Experiment Station Technical
Report Y-87-1.
United States Department of Agriculture, Natural Resources Conservation Service.
National forestry manual. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/
home/?cid=nrcs142p2_053374
United States Department of Agriculture, Natural Resources Conservation Service.
National range and pasture handbook. http://www.nrcs.usda.gov/wps/portal/nrcs/
detail/national/landuse/rangepasture/?cid=stelprdb1043084
16
United States Department of Agriculture, Natural Resources Conservation Service.
National soil survey handbook, title 430-VI. http://www.nrcs.usda.gov/wps/portal/
nrcs/detail/soils/scientists/?cid=nrcs142p2_054242
United States Department of Agriculture, Natural Resources Conservation Service.
2006. Land resource regions and major land resource areas of the United States,
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Custom Soil Resource Report
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