23-105468-Shoreline Vegetation Management Conservation Plan -11-9-23
SHORELINE VEGETATION MANAGEMENT
CONSERVATION PLAN
AFRIASABI RESIDENTIAL REPAIR
NOVEMBER 2023
SHORELINE VEGETATION MANAGEMENT
CONSERVATION PLAN
AFRIASABI RESIDENTIAL REPAIR
NOVEMBER 6, 2023
PROJECT LOCATION
3620 SW DASH POINT ROAD
FEDERAL WAY, WA 98023
PREPARED FOR
JOHN STEVENSON
7001 SEAVIEW AVE NW, STE 16O PMB 43
SEATTLE, WA 98117
PREPARED BY
SOUNDVIEW CONSULTANTS LLC
2907 HARBORVIEW DRIVE, SUITE D
GIG HARBOR, WASHINGTON 98335
(253) 514-8952
2583.0001 – SW Dash Point Road iv Soundview Consultants LLC
Conceptual Shoreline Vegetation Management Conservation Plan November 7, 2023
Executive Summary
Soundview Consultants LLC (SVC) has been assisting John Stevenson (herein referred to as the
“Applicant”) with a shoreline vegetation management conservation plan for a series of shoreline and
residential stabilization actions following a landslide event that occurred in December 2022. The
project is situated on a 1.07-acre property located at 3620 Southwest Dash Point Road in the City of
Federal Way, Washington. The subject property consists of one tax parcel situated in the Northeast
¼ of Section 11, Township 21 North, Range 03 East, W.M (King County Tax Parcel 6613500030).
A formal site investigation was performed by qualified SVC staff on May 4, 2023, and consisted of a
walk-through survey of the subject property and accessible areas within 300 feet of the site for
potentially regulated wetlands, fish and wildlife habitat, and/or priority habitat and species. Using
current methodology, the site investigation identified and delineated the shoreline of Dumas Bay in
south Puget Sound, and an eelgrass patch along the subject property shoreline. As a regulated
shoreline, Dumas Bay is subject to shoreline environment designations that implement policies and
regulated for proposed uses and developments. The residential shoreline of Dumas Bay which extends
onsite is designated as Urban Conservancy, and as such is subject to a 50-foot shoreline setback per
the FWRC 15.05.070(6). All land within 200 feet of the OHWM is further identified as shorelands
zone and subject to the standards and policies under FWRC Chapter 15.05 Shoreline Management.
Eelgrass beds identified within the intertidal region waterward of the subject property shoreline are
considered critical salmonid habitat per FWMC 15.05.030 and as such are subject to certain
development standards outlined in FWMC 15.05.040(5) to avoid or minimize impact to the habitat.
No other potentially regulated wetlands fish and wildlife habitat were identified within 300 feet of the
subject property.
The Applicant proposes a series of shoreline and residential stabilization and repair actions to
remediate impacts to the existing residence, bulkhead, stormwater infrastructure and shoreline
following a landslide that took place in December of 2022. All proposed actions will be located within
the shorelands zone of Dumas Bay; however, only the bulkhead and soft slope stabilization methods
will take place within the 50-foot shoreline setback. A Shoreline Vegetation Management
Conservation Plan is provided in Chapter 3 of this to address proposed mitigation and remediation
actions along the subject property shoreline.
The summary table below summarizes the identified critical areas and the potential regulatory status
by different agencies.
Feature
Name Size Onsite SED1
Regulated Under
FWRC Chapter
15.05
Regulated Under
RCW 90.48
Regulated Under
Section 404 of the
Clean Water Act
Dumas Bay 130 LF Urban Conservancy Yes Yes Likely
1. Shoreline Environmental Designation (SED) identified per FWRC 15.05.060
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Conceptual Shoreline Vegetation Management Conservation Plan November 7, 2023
Table of Contents
Chapter 1. Regulatory Considerations ........................................................................................................... 1
1.1 Local Regulations .................................................................................................................................... 1
1.2 FEMA Habitat Assessment ................................................................................................................... 9
1.2.1 Bulkhead Exemption ........................................................................................................................... 9
1.3 State and Federal Considerations ......................................................................................................... 9
Chapter 2. Shoreline Vegetation Management and Conservation Plan ................................................... 12
2.1 Description of Impacts ................................................................................................................... 12
2.2 Mitigation Strategy .......................................................................................................................... 12
2.3 Approach and Best Management Practices ................................................................................. 13
2.4 Goals, Objectives, and Performance Standards .......................................................................... 14
2.5 Plant Materials and Installation for Mitigation Actions .................................................................. 14
2.6 Long-Term Maintenance and Monitoring ......................................................................................... 16
2.7 Contingency Plans................................................................................................................................. 16
Chapter 3. Closure .......................................................................................................................................... 17
Chapter 4. References .................................................................................................................................... 18
Appendices
Appendix A – Site Plans
Appendix B – Qualifications
1155.0005 Breimer Bluff Property Soundview Consultants LLC
Wetland and Fish and Wildlife Habitat Assessment 1 August 20, 2015
Chapter 1. Regulatory Considerations
Soundview Consultants LLC (SVC) has been assisting John Stevenson (herein referred to as the
“Applicant”) with a shoreline vegetation management conservation plan for a series of shoreline and
residential stabilization actions following a landslide event that occurred in December 2022. The
project is situated on a 1.07-acre property located at 3620 Southwest Dash Point Road in the City of
Federal Way, Washington. The subject property consists of one tax parcel situated in the Northeast
¼ of Section 11, Township 21 North, Range 03 East, W.M (King County Tax Parcel 6613500030).
The results of the site investigation in May of 2023 identified and delineated the shoreline of Dumas
Bay running along the northwestern boundary of the subject property. Additionally, a patch of non-
native eelgrass (Zostera japonica) was identified within the intertidal zone of the subject property
extending offsite to the west. No other potentially-regulated wetlands, waterbodies, fish and wildlife
habitat, or priority species were identified within 300 feet of the subject property during the site
investigation.
1.1 Local Regulations
1.1.1 Buffer Requirements
As a regulated shoreline, Dumas Bay is subject to shoreline environment designations that implement
policies and regulated for proposed uses and developments. The residential shoreline of Dumas Bay
which extends onsite is designated as Urban Conservancy, and as such is subject to a 50-foot shoreline
setback per Federal Way Revised Code (FWRC) 15.05.070(6). All land within 200 feet of the OHWM
is further identified as shorelands zone and subject to the standards and policies under FWRC Chapter
15.05 Shoreline Management. Additionally, FWRC 15.05.090(3)(e) considers all land within the
shoreline setback as a vegetation conservation area, subject to regular maintenance of vegetation
required per FWRC 15.05.075(3). Eelgrass beds identified within the intertidal region waterward of
the subject property shoreline are identified as critical salmonid habitat per FWMC 15.05.030, and as
such are subject to certain development standards outlined in FWMC 15.05.040(5) to avoid or
minimize impact to the habitat. These buffers apply to all proposed development, repairs, and
stabilization measures onsite.
Table 1. Shoreline Buffer Summary
Shoreline Type Standard Buffer Width (feet)1
Dumas Bay Urban Conservancy SED,
residential property 50
1. Buffer width based on residential use of the shoreline per FWRC 15.05.070(6).
1.1.2 Shoreline Stabilization
The proposed project is located within the Urban Conservancy Shoreline Environmental Designation
(SED) and is subject to development standards outlined in FWRC 15.05.090. Shoreline modifications,
such as bulkhead actions are permitted in the Urban Conservancy SED per FWRC 15.05.090(4)(a)(i)
when criteria outlined in FWRC 15.05.040 and 15.05.050(1) are met. All applicable mitigation
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sequencing to address the proposed project has been provided under chapter 1.1.3. Additionally,
mitigation actions have been outlined under Chapter 3 and are anticipated to fully rectify all impacts
associated with the existing landslide and additional impacts imposed from shoreline stabilization
measures.
FWRC 15.05.040(5) addresses critical salmonid habitat within the proposed project area and requires
development to adhere to the following applicable standards:
(a) Structures which prevent the migration of salmon and steelhead are prohibited. Fish bypass facilities shall allow
the upstream migration of adult fish. Fish bypass facilities shall prevent fry and juveniles migrating downstream
from being trapped or harmed.
No structures associated with shoreline modification have been designed to prevent the
migration of salmon and steelhead. Shoreline modification actions will be limited to restoring
the existing bulkhead to its original tidal elevation immediately landward of OHW and
stabilizing the shoreline riparian zone (RZ). The upland sediments and vegetation associated
with the RZ and existing bulkhead area along the face of the subject property were pushed
into the upper shore zone (USZ) following a landslide. As such a section of the existing
bulkhead and upland sediments currently impact the USZ and potentially impact mitigation
routes and available habitat for salmon and steelhead. Following repair of the shoreline and
bulkhead all upland sediments and obstructing structures will be removed from the USZ.
Overall, proposed shoreline modification actions are anticipated to improve potential
migratory paths of salmon and steelhead over existing conditions.
(b) Shoreline modification structures may intrude into critical salmonid habitats only where the proponent
demonstrates all of the following conditions are met:
(i) An alternative alignment or location is not feasible;
Proposed actions are the minimum modifications necessary to restore the bulkhead and RZ
to their previous conditions prior to the landslide. Given the current displacement of sediment
and riprap below the OHW line, alternative alignment or location for repair is not feasible.
(ii) The project is designed to minimize its impacts on the environment;
All proposed shoreline modifications have been designed to restore the subject property
shoreline and remediate impacts associated with the landslide event. Following repairs, the
USZ will be free of upland sediments, riprap, and other obstructing structures.
(iii) If the project will create unavoidable adverse impacts, the impacts are mitigated by creating in-kind
replacement habitat near the project. Where in-kind replacement mitigation is not feasible, rehabilitating
degraded habitat may be required as a substitute;
Not applicable. All proposed actions are anticipated to improve the shoreline of Dumas Bay
over existing conditions. No unavoidable adverse impacts have been proposed at this time,
and proposed actions are the minimum necessary to restore and stabilize the shoreline and
associated structures. Further, mitigation will be provided onsite to restore the RZ following
shoreline stabilization. See Chapter 3 for proposed mitigation.
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(iv) The project satisfies all provisions of FWRC 15.05.050, Shoreline modifications.
The project will satisfy all provision of FWRC 15.05.050 for shoreline modifications within
the Urban Conservancy SED. FWRC 15.05.050(1) states hard armoring methods such as
riprap bulkheads may be permitted within the Urban Conservancy SED but will be subject to
requirements of shoreline conditional use permit. However, per FWRC 15.05.050(1)(b)(iv) If
an existing bulkhead or other stabilization structure is destroyed it may be replaced as it existed prior to
destruction, provided application for required permits is made within one year of destruction. Additions to or
increases in size of existing shoreline stabilization measures shall be considered new structures. Shoreline
associated construction is limited to bulkhead repair and shoreline stabilization of the riparian
zone following the landslide in December 2022. The landslide took place along the shoreline
slope of the subject property due to a leak in the residence’s water pipe which went unnoticed
for over a week. The landslide caused the entire topsoil, subsurface soil layer, and a large swath
of upland vegetation to shift down the shoreline slope and into the existing bulkhead. Due to
the force of the landslide both the upland sediments and a section of the bulkhead were pushed
into the USZ by approximately 14 feet. The project attempts to repair the approximately 25-
foot section of bulkhead moved by the landslide to its original placement immediate landward
of OHW, and remediate impact to the USZ caused by the slide. No additions or increases to
the existing bulkhead are proposed at this time.
(c) Open pile bridges are the preferred water crossing structures over critical salmonid habitats. If a bridge is not
feasible, one of the following water crossing structures may be approved if the impacts can be mitigated: temporary
culverts, bottomless arch culverts, elliptical culverts, or other fish-passable round culverts. These structures are listed
in priority order, with the first having the highest preference and the last the lowest preference. In order for a lower
priority structure to be permitted, the applicant must show the higher priority structures are not feasible. The project
shall be designed to minimize its impacts on the environment.
Not applicable - no water crossing structures are proposed.
(d) Bridges and in-water utility corridors may be located in critical salmonid habitats provided the proponent shows
that all of the following conditions are met:
Not applicable - no bridges or utilities corridors are proposed.
(e) Dredging in critical salmonid habitats shall not be allowed unless the proponent demonstrates all of the following
conditions are met:
Not applicable – dredging of critical salmonid habitat is not proposed. Upland sediments and
obstructing structures currently displaced on the beach following the landslide will be collected
and discarded in an appropriate upland area.
(f) In-water dredge spoil disposal sites shall not be located in critical salmonid habitats.
Upland sediments and obstructing structures currently displaced on the beach following the
landslide will be collected and discarded in an appropriate upland area.
(g) Filling, dumping, discharging (including discharging of stormwater), commercial or industrial wastewater,
dredging, channelization, draining, flooding, disturbing the water level, duration of inundation of water tables, and
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other activities which negatively impact habitat are prohibited in wetlands, ponds, and side channels which are
associated with critical salmonid habitats.
Not applicable – not impact to wetlands, ponds, or side channels are proposed.
(h) Within critical salmonid habitats, permanent channel changes and realignments are prohibited.
Not applicable – no permanent channel changes are proposed.
(i) The removal of aquatic and riparian vegetation within or adjacent to critical salmonid habitats shall be
minimized. Trees which shade side channels, streams, estuaries, ponds, and wetlands associated with critical
salmonid habitats shall be maintained consistent with the provisions of this chapter. Areas of disturbed earth shall
be revegetated.
No additional aquatic or riparian vegetation removal is proposed within the shoreline modification
actions. Large woody debris moved during the landslide will be retained below OHW as potential
habitat structures for marine species. Additionally, mitigation actions will be incorporated to
enhance native riparian vegetation following shoreline stabilization actions, and further improve
stability through soft armoring techniques. Enhancement actions will fully replant the 50-foot
shoreline setback with native vegetation, including native trees and shrubs along the toe of slope,
and willow stakes landward of the toe of slope to the shoreline setback. Additionally, the mid-
slope stabilization area will be seeded with a native seed mix and the perimeter will be planted with
native shrubs. Overall, proposed project actions are anticipated to aid in restoring the riparian
vegetation to it condition prior to the landslide.
(j) Unless removal is needed to prevent hazards to life and property or to enhance critical salmonid habitats, large
woody debris below the ordinary high water mark shall be left in the water to provide salmon and steelhead habitat
All woody vegetation pushed onto the beach following the landslide will be retained on the beach
as wildlife structures for salmon and steelhead habitat.
In order for shoreline stabilization methods such as bulkheads to be permitted, FWRC 15.05.050.(1)(a)
requires the following criteria to be met:
(i) The applicant shall provide a geotechnical report, prepared by a qualified professional, that estimates the
rate of erosion and evaluates alternative solutions; the urgency associated with the specific situation; and
demonstrates the project is consistent with WAC 173-26-231; and
See the geotechnical report completed by Earth Solutions in October, 2023 for all applicable
details.
(ii) Soft-shore stabilization alternatives such as slope drainage systems, vegetative growth stabilization, gravel
berms, and beach nourishment shall be prioritized over structural options such as bulkheads and riprap. The
“softest” effective alternative shall be utilized; and
A combination of hard and soft armoring solutions have been incorporated into project design
to restore the existing bulkhead and shoreline slope to their preexisting state. Work along the
25-linear-foot section of bulkhead will be limited to relocating existing riprap rocks currently
located throughout the USZ to their preexisting location landward of OHW. Soft stabilization
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methods including live stake planting and native tree and shrub planting will be integrated
within the RZ stabilization design to further stabilize the shoreline slope.
(iii) In the case of proposed hard armoring stabilization solutions (e.g., bulkheads and riprap), erosion from
waves or currents presents a clear and imminent (damage within three years) threat to a legally established
primary structure, one or more substantial accessory structures, water-dependent development, ecological
restoration/toxic clean-up remediation projects, or public improvements; and
See the Geotechnical Report for details.
(iv) In the case of bulkheads and riprap, the proposed shoreline stabilization is located landward of the ordinary
high water mark; and
All bulkhead repair and shoreline stabilization actions will be located landward of the OHW.
Due to the landslide, an existing 25-linear-foot section of bulkhead has been pushed below
the OHW line. The project aims to relocate all sections of riprap landward of the OHW line
onsite to the preexisting location prior to the slide.
(v) The proposed shoreline stabilization is the minimum size necessary to protect existing improvements; and
Shoreline stabilization measures will be limited to repairing and relocating the displaced section
of bulkhead and restoring the shoreline slope to prevent further erosion onsite waterward of
the existing residence. No additions or expansions of the bulkhead have been proposed.
(vi) The applicant shall demonstrate that impacts to sediment transport are minimized to the greatest extent
possible; and
See the Geotechnical Report for details. The subject property shoreline is mapped as within
an accretion zone receiving sediments from a feeder bluff located northeast of the site.
Displacement of the bulkhead within the USZ, if left untreated, will likely have long-term
impacts to sediment transport and littoral drift throughout onsite section of shoreline by
imposing a jetty-like shoreline feature. Relocation of the bulkhead riprap and upland
sediments/materials landward of OHW will restore the shoreline to it preexisting state and
remove current obstructions that affect sediment transport along the Dumas Bay shoreline.
(vii) Shoreline stabilization shall not have an adverse impact on the property of others and shall be designed so
as not to create the need for shoreline stabilization elsewhere; and
The existing shoreline is entirely armored with riprap that extends offsite along the east and
west adjacent properties, and as such proposed repairs are not anticipated to impact shoreline
stabilization along offsite sections of shoreline. However, if left untreated, the landslide and
bulkhead breach could compromise the efficacy and strength of the adjacent shoreline
armoring and adjacent properties. Therefore, it is necessary to implement repairs onsite as
quickly as possible.
(viii) Shoreline stabilization shall not significantly interfere with normal surface and/or subsurface drainage
into the water body and shall be constructed using an approved filter cloth or other suitable means to allow
passage of surface and groundwater without internal erosion of fine material; and
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The proposed project is not anticipated to significantly interfere with existing surface and or
subsurface drainage patterns onsite. See the survey drawing for details on proposed shoreline
stabilization methods and construction materials (Lake Tree Land Surveying, 2023).
(ix) Shoreline stabilization shall not be used to create new lands; and
Shoreline stabilization actions are limited to repairing the existing bulkhead and upland slope.
No creation of additional land has been proposed.
(x) Use of chemically treated wood is prohibited for any shoreline stabilization proposal within fresh water lake
shorelines; and
Not applicable.
(xi) Use of creosote-treated wood is prohibited within marine shorelines; and
Not applicable. Creosote treated wood will not be used in the shoreline stabilization proposal
onsite.
(xii) Revegetation with native plants is required as part of the shoreline stabilization project; and
The shoreline slope will be revegetated with native vegetation to the extent feasible. However,
due to the severity of the landslide and existing slope grade onsite complete revegetation is
likely unfeasible. The project proposes complete revegetation of the land above OHW and
below the 20-foot contour onsite. Replanting will include installation of native trees and shrubs
while live willow stakes will be installed along the upland slope. Vegetation will be replaced
within the RZ as feasible to further support stabilization of the shoreline slope. See Chapter
3 for further discussion revegetation practices.
(xiii) Shoreline stabilization shall not otherwise result in a net loss of ecological functions.
All proposed shoreline stabilization actions are anticipated to improve ecological functions
onsite and within Dumas Bay over existing conditions. Given the landslide caused the existing
bulkhead to obstruct the intertidal zone, relocation of these items above OHW will remove
existing obstructions and free substrate for habitat utilization. The proposed work below
OHW and within the shoreline setback is the minimum necessary to stabilize the shoreline to
the state prior to the landslide.
1.1.3 Mitigation Sequencing
The proposed project includes repair and stabilization of the subject property shoreline and residential
structures. All project actions are in response to the landslide and as such no novel impacts are
imposed. However, given the bulkhead repair and section of shoreline stabilization will be located in
the 50-foot setback, the project will comply with mitigation sequencing standards outlined in
15.05.040.(1)(b) which have been addressed below:
1. Avoiding the impact altogether by not taking a certain action or parts of actions.
The purpose of the proposed project is to restore the residential structures and stabilize the
subject property shoreline following a landslide that took place in December of 2022. The
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project was carefully designed to avoid direct impacts to the shoreline of Dumas Bay; however,
given the nature of the existing impact, work within the 50-foot shoreline setback and the
intertidal zone are unavoidable. The proposed work will be limited to restoring the shoreline
by repairing and stabilizing the existing residence, repairing the existing bulkhead and
stabilizing the subject property shoreline. Of the identified actions only the bulkhead repair,
and a portion of the soft shoreline stabilization will be located within the 50-foot setback. All
additional work will be located landward of the shoreline setback but within the 200-foot
shorelands zone.
2. Minimizing impacts by limiting the degree or magnitude of the action and its implementation by using
appropriate technology or by taking affirmative steps to avoid or reduce impacts;
No adverse impacts to Dumas Bay are proposed. Project actions are in response to the
landslide and are the minimum necessary to sufficiently stabilize the subject property shoreline
and restore the shoreline and residential structures to their preexisting conditions. Actions will
be located within the existing footprints onsite and revegetation of the slope will be provided
to further aid in slope stabilization and habitat restoration. Repair of the residence will be
limited to reconstructing a section of the dilapidated deck structure and stabilizing the
residence with two parallel retaining walls located directly below the residence and landward
of the shoreline setback. The bulkhead repair will consist of relocating the existing riprap
landward of OHW. Additionally, shoreline stabilization actions within the RZ have been
adjusted to start immediately above the 50-foot setback to further reduce impact to the subject
property shoreline. As feasible, large woody debris displaced from the landslide will be retained
on the beach to provide habitat features and inputs that may be utilized by intertidal species.
In addition, all appropriate BMPs and TESC measures will be implemented throughout the
duration of the project to Dumas Bay from temporary construction impacts.
3. Rectifying the impact by repairing, rehabilitating, or restoring the affected environment.
All actions are self-mitigating and anticipated to improve ecological functions of the shoreline
following construction. The landslide displaced a significant amount of sediments, materials,
and upland vegetation in addition to a section of bulkhead onto the USZ below the identified
OHW onsite. Through proposed repair actions all materials excluding large woody debris will
be pulled landward of the OHW line or disposed of in an upland containment area offsite.
Relocating these materials will remove existing obstructions along the USZ and free intertidal
substrate for habitat utilization. Additionally, following stabilization actions the shoreline will
be revegetated to the extent feasible to further restore the slope. Live native willow stakes will
be planted within the landslide area of the shoreline setback as feasible, while the entire lower
portion of the degraded slope will be planted with a suite of native trees and shrubs and
reseeded to restore ecological functions. Additionally, the section of midslope stabilization will
be seeded with a native grass and herbaceous species mix and the perimeter will be planted
with native shrubs.
4. Reducing or eliminating the impact over time by preservation and maintenance operations;
All proposed actions will remediate existing impact and eliminate long-term impacts to the
shoreline of Dumas Bay. Intertidal impacts associated with the landslide will likely result in
long-term impacts to sediment transport and littoral drift throughout onsite section of
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shoreline if left untreated. Through implementing shoreline stabilization and bulkhead repair
actions, the intertidal zone and shoreline will be restored to the extent feasible providing the
shoreline of Dumas Bay with an immediate lift in ecological functions. Additionally, a
mitigation and monitoring plan will be implemented for shoreline restoration and
enhancement actions to ensure success of the slope revegetation actions.
5. Compensating for the impact by replacing, enhancing or providing substitute resources or environments; and
All actions are self-mitigating and anticipated to improve ecological functions of the shoreline
following construction. No additional compensation is necessary following project
completion. Shoreline restoration and enhancement actions to support shoreline stabilization
are anticipated to remediate all impacts associated with the landslide.
6. Monitoring the impact and the compensation projects and taking appropriate corrective measures.
Monitoring will be completed by the Applicant for a period of 2 years per FWRC 15.05.075.3.b
to ensure success of the restoration and enhancement actions. See Chapter 3 for additional
monitoring measures and associated performance standards.
1.1.4 Shoreline Substantial Development Exemption
Per FWRC 15.05.150(1), Shoreline Substantial Development Permits (SSDP) are required for project
actions within the 200-foot shorelands zone that exceed a construction cost of greater than 5,000
dollars per RCW 90.58.030(3)(e). Project actions and circumstances exempt from a SSDP have been
provided under FWRC 15.05.130(2) and outlined in the WAC 173-27-040 described below.
(b) Normal maintenance or repair of existing structures or developments, including damage by accident, fire or elements.
"Normal maintenance" includes those usual acts to prevent a decline, lapse, or cessation from a lawfully established
condition. "Normal repair" means to restore a development to a state comparable to its original condition, including but
not limited to its size, shape, configuration, location and external appearance, within a reasonable period after decay or
partial destruction, except where repair causes substantial adverse effects to shoreline resource or environment. Replacement
of a structure or development may be authorized as repair where such replacement is the common method of repair for the
type of structure or development and the replacement structure or development is comparable to the original structure or
development including but not limited to its size, shape, configuration, location and external appearance and the
replacement does not cause substantial adverse effects to shoreline resources or environment;
The Applicant proposes a series of shoreline and residential stabilization and repair actions to
remediate impacts to the existing residence, bulkhead, stormwater infrastructure and shoreline
following the landslide that took place in the winter of 2022. All proposed actions will be located
within the 200-foot shorelands zone of Dumas Bay; however, only the bulkhead will take place within
the 50-foot shoreline setback. The project proposal is the minimum construction necessary to repair
the shoreline and associated structures following the damage caused by the landslide. Actions will be
located within the existing footprints onsite and revegetation of the slope will be provided to further
aid in slope stabilization and habitat restoration. Repair of the residence will be limited to
reconstructing and stabilizing a section of the dilapidated deck structure, while bulkhead repair will be
limited to relocating the existing riprap displaced in the intertidal zone to its original position landward
of OHW. All proposed shoreline stabilization actions are anticipated to improve ecological functions
onsite and within Dumas Bay over existing conditions. The landslide caused the existing bulkhead and
upland sediments to obstruct a section of the intertidal zone. By relocating these materials above
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OHW, the project will remove existing obstructions along the USZ and free substrate for habitat
utilization. Additionally, following stabilization actions the shoreline will be revegetated to the extent
feasible to further restore the slope. Overall, the proposed project will implement the minimum
actions necessary to sufficiently restore the slope and stabilize the shoreline and existing structures.
The project complies with exemptions outlined in FWRC 15.05.130(2) and the WAC 173-27-040.
1.2 FEMA Habitat Assessment
The FEMA National Flood Insurance Program Record of Decision requires local communities to
obtain and maintain documentation of compliance with appropriate state and federal laws, including
the Endangered Species Act (ESA), as a condition of issuing floodplain development permits (FEMA,
2018). FEMA has provided local jurisdictions with guidelines for floodplain habitat assessments
consistent with the National Marine Fisheries Services’ Biological Opinion on the implementation of
the National Flood Insurance Program in Puget Sound; these guidelines from the Puget Sound BiOp
Floodplain Habitat Assessment Worksheet (FEMA, 2017).
1.2.1 Bulkhead Exemption
The proposed slope stabilization and bulkhead restoration will require activity within the mapped 100-
year floodplain. All actions located within the floodplain are the minimum necessary to restore the
shoreline slope to its preexisting state following the landslide. Development will involve relocating
existing riprap rocks displaced by the landslide landward of the OHW onsite. Additionally, upland
sediments and materials slumped along the intertidal zone will be relocated above OHW and outside
of the VE Zone onsite. All shoreline stabilization and repairs to the existing residence apart from
buffer restoration will take place outside of the 100-year floodplain. The proposed project will not
result in additional structures or filling material placed within the floodplain. Actions are anticipated
to improve water quality over existing conditions through slope restoration actions and installation of
native trees and shrub species. Per the Puget Sound BiOp Floodplain Habitat Assessment Worksheet,
bulkhead repair in the same location and footprint with the same materials will not require a formal
habitat assessment. The Floodplain Development Permit will be provided in the overall project
submittal.
1.3 State and Federal Considerations
On January 18, 2023, USACE and EPA published a revised definition of “Waters of the United States”
(USACE and EPA, 2023a). The revised rule became effective on March 20, 2023. On May 25, 2023,
the U.S. Supreme Court issued a decision affecting the definition of Waters of the United States, or
“WOTUS”, in Sackett Et Ux. V Environmental Protection Agency Et Al. On August 29, 2023, the US
EPA and USACE issued a final rule to amend the final “Revised Definition of ‘Waters of the United
States’” rule. The amendment conforms the definition of “Waters of the United States” to the U.S.
Supreme Court’s decision in the Sackett Et Ux. V Environmental Protection Agency Et Al case. The
revised and amended definition of “Waters of the United States” is as follows:
(a) Waters of the United States means:
(1) Waters which are: (i) Currently used, or were used in the past, or may be susceptible to use in interstate or
foreign commerce, including all waters which are subject to the ebb and flow of the tide; (ii) The territorial seas; or
(iii) Interstate waters;
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(2) Impoundments of waters otherwise defined as waters of the United States under this definition, other than
impoundments of waters identified under paragraph (a)(5) of this section;
(3) Tributaries of waters identified in paragraph (a)(1) or (2) of this section: that are relatively permanent, standing
or continuously flowing bodies of water;
(4) Wetlands adjacent to the following waters: (i) Waters identified in paragraph (a)(1) of this section; or (ii)
Relatively permanent, standing or continuously flowing bodies of water identified in paragraph (a)(2) or (a)(3) of
this section and with a continuous surface connection to those waters;
(5) Intrastate lakes and ponds not identified in paragraphs (a)(1) through (4) of this section that are relatively
permanent, standing or continuously flowing bodies of water with a continuous surface connection to the waters
identified in paragraph (a)(1) or (a)(3) of this section;
(b) The following are not “waters of the United States” even where they otherwise meet the terms of paragraphs (a)(2)
through (5) of this section:
(1) Waste treatment systems, including treatment ponds or lagoons, designed to meet the requirements of the Clean
Water Act;
(2) Prior converted cropland designated by the Secretary of Agriculture. The exclusion would cease upon a change
of use, which means that the area is no longer available for the production of agricultural commodities.
Notwithstanding the determination of an area's status as prior converted cropland by any other Federal agency, for
the purposes of the Clean Water Act, the final authority regarding Clean Water Act jurisdiction remains with
EPA;
(3) Ditches (including roadside ditches) excavated wholly in and draining only dry land and that do not carry a
relatively permanent flow of water;
(4) Artificially irrigated areas that would revert to dry land if the irrigation ceased;
(5) Artificial lakes or ponds created by excavating or diking dry land to collect and retain water and which are
used exclusively for such purposes as stock watering, irrigation, settling basins, or rice growing;
(6) Artificial reflecting or swimming pools or other small ornamental bodies of water created by excavating or
diking dry land to retain water for primarily aesthetic reasons;
(7) Waterfilled depressions created in dry land incidental to construction activity and pits excavated in dry land for
the purpose of obtaining fill, sand, or gravel unless and until the construction or excavation operation is abandoned
and the resulting body of water meets the definition of waters of the United States; and
(8) Swales and erosional features (e.g., gullies, small washes) characterized by low volume, infrequent, or short
duration flow.
The 2023 revised and amended definition of Waters of the United States defines “adjacent” as “having
a continuous surface connection.”
Dumas Bay is regulated under Section 404 of the Clean Water Act (CWA) as Waters of the United
States under the March 20, 2023 rule. On May 25, 2023, the U.S. Supreme Court issued a decision
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affecting the definition of Waters of the United States in Sackett Et Ux. V Environmental Protection
Agency Et Al. While USACE is in receipt of the Supreme Court decision, no formal, revised definition
of Waters of the United States has been issued at the time of this report drafting. The proposed
project therefore continues to assume that the onsite Dumas Bay is considered a Waters of the United
States and regulated as surface waters of the state by the WSDOE under the Revised Code of
Washington (RCW) 90.48. All work below the OHW of Dumas Bay will require authorizations from
the USACE or WSDOE.
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Chapter 2. Shoreline Vegetation Management and
Conservation Plan
The following sections present the proposed shoreline vegetation management and conservation plan
to improve shoreline buffer protections and ecological functions following shoreline restoration and
stabilization actions for the existing residence.
2.1 Description of Impacts
The project proposes a series of slope stabilization and residential structural stabilization and repair
actions along the subject property shoreline to restore the site following a landslide that took place in
late December of 2022. The landslide caused a portion of the deck attached to the residence and the
main shoreline bluff to destabilize and slide down the slope into the existing bulkhead. Due to the
force from the slide, the upland materials pushed an approximately 20-foot linear section of bulkhead
into the upper shore zone (USZ).
Repair and stabilization of the residence will consist of restoring the waterward attached concrete deck
and implementing three retaining walls along the top of slope. One retaining wall will tie into the
existing concrete block wall along the deck and the southeast extent (top) of the landslide area, and
the second retaining wall will run along the prior, preexisting top of slope area. The third wall will be
located halfway up the concrete stairs and will be in line with the start of the upper wall. The walls
will be five (5) to fifteen (15) feet in height and will be secured via soldier pile, with an additional 110
square foot triangular shotcrete wall utilized for additional site access stabilization in the north. The
retaining walls will be backfilled with suitable soil material above the shotcrete and the tops may be
planted with native herbaceous plants or shrubs to provide additional stabilization to help restore the
shoreline. Overall, the retaining walls will provide structural support beneath and immediately north
of the residence in the affected area.
Shoreline stabilization actions will consist of a mid-slope stabilization and a toe of slope stabilization.
The mid-slope stabilization will be provided between elevations 60 feet and 90 feet above mean sea
level over an approximately 1,547-square-foot area located perpendicular to the shoreline. The slope
stabilization actions will occur landward of the 50-foot shoreline buffer. The slope will be stabilized
using a rockfall protection mesh with 50 mm opening and 3.8 mm wire securely drilled into the slope
(Tecco Mat). The lower portion of the affected slope area from the delineated OHW to approximately
+20 feet NAVD88 consists of a gradual slope. This portion of the slope is fully within the 50-foot
shoreline buffer and will be safely replanted with native trees and shrubs and reseeded to minimize
erosion and restore shoreline ecological functions. Additionally, the entire 50-foot shoreline setback
within the landslide area will be replanted with live willow stakes to further stabilize the slope. The
section of bulkhead displaced by the landslide will be restored to its preexisting condition by lifting
the existing riprap blocks and placing them in their original position landward of OHW. The proposed
bulkhead realignment will be performed during low tide to minimize erosion potential, and access will
be provided via a neighboring parcel or barge. No impacts to existing eelgrass beds are proposed. All
actions are the minimum necessary to restore and stabilize the shoreline and associated residential
structures.
2.2 Mitigation Strategy
All work waterward of the 50-foot setback is designed to restore the shoreline buffer and intertidal
zone following the landslide event. Relocation of the bulkhead riprap and upland sediments/materials
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Conceptual Shoreline Vegetation Management Conservation Plan November 7, 2023
landward of OHW will restore the shoreline to it preexisting state and remove current obstructions
that affect sediment transport along the Dumas Bay shoreline. Additionally, restoration actions will
include replanting the land immediately upland of the OHW (+10 feet NAVD88 to +20 feet
NAVD88) with an assortment of native trees and shrub species and seeding the slope with a native
grass mix. Further, the entire 50-foot shoreline setback located within the landslide area will be
replanted with native willow stakes to improve root structure along the steep slope. The area of
midslope stabilization and Tecco matting will be seeded with a native grass and herbaceous species
mix and the perimeter of the mat will be planted with native shrubs to promote natural revegetation
of the exposed slope. Providing native plantings within the buffer will restore the habitat functions
and critical area protections provided by the site and will improve overall root structure to support
long term slope stability. A diverse assortment of primarily trees and shrubs will further provide
woody debris, and organic matter to the intertidal zone that may be utilized by nearshore species. The
proposed project will result in a net gain in ecological functions when compared to the existing
degraded conditions onsite.
The proposed mitigation actions include, but may not be limited to, the following recommendations:
Repair the slumped section of bulkhead displaced by the landslide by restacking the original
angular rock material onto the base rocks located along the OHW.
Retain all woody debris identified within the intertidal zone displaced by the landslide.
Relocate upland material including riprap, concrete blocks and excess sediment moved by
the landslide above OHW, and/or disposing of materials in an upland facility offsite.
Restore the onsite shoreline buffer areas to the extent feasible as shown in Appendix C;
Pre-treat invasive plants, if present, with a Washington Department of Agriculture
approved herbicide. After pre-treatment, grub to remove the invasive plants and replant all
cleared areas with native trees, shrubs, and ground covers listed in Appendix C; pre-
treatment of the invasive plants should occur a minimum of two weeks prior to removal;
Plant the planting area immediately landward of the bulkhead with native trees, and shrubs
listed in Appendix C, or substitutes approved by the responsible Project Scientist, to help
retain soils, filter stormwater, and increase biodiversity;
Plant the steep slope area with native willow stakes to the extent feasible.
An approved native seed mix will be used to seed the disturbed enhancement areas after
planting;
Remove any trash and other debris within the intertidal zone remanent of the landslide;
Provide dry-season irrigation as necessary to ensure native plant survival;
2.3 Approach and Best Management Practices
The proposed shoreline vegetation management and conservation plan is intended to provide
improved shoreline protections by restoring the riparian vegetation onsite and freeing the intertidal
zone of upland debris and material. Restoration activities within the shoreline buffer should occur
immediately following the completion of stabilization actions including relocating the bulkhead to its
location prior to the slide. TESC measures will be implemented that consists of high-visibility fencing
(HVF) and silt fencing along the bulkhead and around the project area, plastic sheeting on stockpiled
materials, and seeding of disturbed soils. These TESC measures should be installed prior to the start
of stabilization and reconstruction actions and actively managed for the duration of the project.
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All equipment staging and materials stockpiles should be kept out of the buffer, and landward of the
top of slope onsite, and the staging area will need to be kept free of spills and/or hazardous materials.
All fill material used for the retaining wall backfill will be sourced from upland areas onsite or from
approved suppliers and will need to be free of pollutants and hazardous materials. Construction
materials along with all construction waste and debris should be effectively managed and stockpiled
on paved surfaces and kept free of the buffer areas. Following completion of the project, the entire
site should be cleaned and detail graded using hand tools wherever necessary, and TESC measures
will need to be removed.
2.4 Goals, Objectives, and Performance Standards
The goals and objectives for the proposed shoreline buffer restoration actions are based on restoring
the riparian zone for Dumas Bay to its condition prior to the landslide to the extent feasible. The
buffer restoration actions are capable of improving habitat function for the shoreline over time by
restoring a dense native vegetation barrier between the upland development and the shoreline. The
goals and objectives of the mitigation actions are as follows:
Goal 1 – Restore shoreline buffer to its condition prior to the landslide by installing 2,218 square feet
of native vegetation along the affected landslide area.
Objective 1.1 – Establish dense cover of native trees, shrubs, and grasses and forbs within
the targeted restoration areas to create diverse horizontal and vertical vegetation structure and
improve wildlife habitat.
Performance Standard 1.1.1 – Minimum plant survivorship within the targeted
buffer areas will be 100 percent of installed trees and shrubs at the end of Year 1, 85
percent at the end of Year 2. Native recruits may be counted towards survivorship
totals; a minimum of 50 percent of the surviving plants must consist of installed
plants.
Performance Standard 1.1.2 – Minimum native woody species cover in the
restoration area will be a minimum 10 percent total cover at the end of Year 1, 20
percent total cover at the end of Year 2.
Performance Standard 1.1.3 – At least 2 native tree species and 3 native shrub
species will be present in the restoration area in all monitoring years. Native volunteer
species will be included in the count.
Performance Standard 1.1.4 – Non-native invasive plants will not make up more
than 20 percent total cover in any growing season during the monitoring period
following Year 1.
2.5 Plant Materials and Installation for Mitigation Actions
2.5.1 Plant Materials
All plant materials to be used for restoration actions will be nursery grown stock from a reputable,
local source. Only native species are to be used; no hybrids or cultivars will be allowed. Plant material
provided will be typical of their species or variety; if not cuttings they will exhibit normal, densely
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developed branches and vigorous, fibrous root systems. Plants will be sound, healthy, vigorous plants
free from defects, and all forms of disease and infestation.
Container stock shall have been grown in its delivery container for not less than six months but not
more than two years. Plants shall not exhibit rootbound conditions. Under no circumstances shall
container stock be handled by their trunks, stems, or tops. Seed mixture used for hand or
hydroseeding shall contain fresh, clean, and new crop seed mixed by an approved method. The
mixture is specified in this plan set.
Seeding within the shoreline buffer area will be at the Applicant’s discretion. Seed mixture used for
hand or hydro-seeding shall contain fresh, clean, and new crop seed mixed by an approved method.
Areas not seeded or finished within the shoreline buffer area will be covered in clean mulch.
2.5.2 Product Handling, Delivery, and Storage
All seed and fertilizer should be delivered in original, unopened, and undamaged containers showing
weight, analysis, and name of manufacturer. This material should be stored in a manner to prevent
wetting and deterioration. All precautions customary in good trade practice shall be taken in preparing
plants for moving. Plants should be packed, transported, and handled with care to ensure protection
against injury and from drying out. If plants cannot be planted immediately upon delivery they should
be protected with soil, wet peat moss, or in a manner acceptable to the project biologist. Plants, and
materials, not installed immediately upon delivery shall be secured on the site to prevent theft or
tampering.
2.5.3 Preparation and Installation of Plant Materials
Live stakes will be at least 3 feet in length inserted into the ground at a depth of at least 1 foot.
Waterward of the +20 feet NAVD88 and within the shoreline buffer restoration area, circular plant
pits with vertical sides should be excavated for all container stock. Each planting pit should be at least
12 inches in diameter, and the depth of the pit should accommodate the entire root system. The
bottom of each pit will be scarified to a depth of 4 inches. Due to the severity of the slope, great
caution should be taken when installing all plant materials.
Broken roots should be pruned with a sharp instrument and root balls should be thoroughly soaked
prior to installation. Set plant material upright in the planting pit to proper grade and alignment.
Water plants carefully midway through backfilling. Water pits again upon completion of backfilling.
No filling should occur around trunks or stems. Do not use frozen or muddy mixtures for backfilling.
2.5.4 Temporary Irrigation Specifications
Given the current state of the slope, SVC does not recommend additional irrigation at this time.
Should native plantings require supplemental watering, the applicant should contact the geotechnical
engineer for irrigation techniques to minimize further slope destabilization.
2.5.5 Invasive Plant Control and Removal
Any non-native invasive species and listed noxious weeds present in the shoreline buffer restoration
areas will be removed. The use of herbicides within these areas may be necessary. If herbicide use is
necessary for noxious weed removal, the area should be carefully pretreated and only as prescribed in
the instructions or by a licensed professional with a root-killing herbicide approved for use in aquatic
sites (e.g. Glyphosate 5.4 containing herbicide). Avoid overspray of the buffer areas and avoid direct
application to aquatic areas.
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2.6 Long-Term Maintenance and Monitoring
The conceptual maintenance and monitoring plan is described below in accordance with FWRC
15.05.075.3.b. The Applicant is committed to compliance with the conceptual mitigation plan and
overall success of the project. As such, the Applicant will continue to maintain the project, keeping
the site free from of non-native invasive vegetation, trash, and other waste.
The shoreline buffer plantings will require maintenance to ensure they survive. Maintenance measures
will include removal of non-native invasive plant species, and irrigation at the instruction of the
geotechnical engineer. If fertilizer is used, it shall be a slow release, natural fertilizer.
2.6.1 Reporting
A brief As-Built report will be submitted to the City of Federal Way following completion of
construction and mitigation actions to establish the pre- and post- planting conditions for monitoring.
Following implementation of the restoration plantings, brief monitoring reports and photos of the
planting areas at 6 months, Year 1, and Year 2 will be submitted to the City of Federal Way per the
vegetation planting monitoring guidelines established in FWRC 15.05.075.3.b. Monitoring is to be
completed by the applicant. If changes are necessary to support the success of the mitigation plan, a
qualified biologist shall be consulted to determine appropriate actions and implementation.
2.7 Contingency Plans
If annual monitoring results indicate that plant survivorship standards are not being met, it may be
necessary to implement all or part of the contingency plan. Careful attention to maintenance is
essential in ensuring that problems do not arise. A contingency plan will be developed and
implemented with regulatory approval as needed. Such plans are adaptive and should be prepared on
a case-by-case basis to reflect any failed restoration characteristics. Contingency plans can include
additional grade control, plant installation, and/or plant substitutions including type, size, and
location.
Contingency/maintenance activities may include, but are not limited to:
1. Replacing plants lost to vandalism, drought, or disease, as necessary;
2. Replacing any plant species with a 20 percent or greater mortality rate after 2 growing seasons
with the same species or native species of similar form and function;
3. Reseeding and/or repair of shoreline buffer area as necessary if erosion or sedimentation
occurs;
4. Removing all trash or undesirable debris from the shoreline buffer area as necessary
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Chapter 3. Closure
The findings and conclusions documented in this report have been prepared for specific application
to this project. They have been developed in a manner consistent with that level of care and skill
normally exercised by members of the environmental science profession currently practicing under
similar conditions in the area. Our work was also performed in accordance with the terms and
conditions set forth in our proposal. The conclusions and recommendations presented in this report
are professional opinions based on an interpretation of information currently available to us and are
made within the operation scope, budget, and schedule of this project. No warranty, expressed or
implied, is made. In addition, changes in government codes, regulations, or laws may occur. Due to
such changes, our observations and conclusions applicable to this site may need to be revised wholly
or in part.
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Chapter 4. References
Federal Way Revised Code (FWRC). 2023. Chapter 15 – Shoreline Management Website:
https://www.codepublishing.com/WA/FederalWay/html/FederalWay15/FederalWay15.html
Current through June 20, 2023
Soundview Consultants. 2023. Shoreline, Wetland and Fish and Wildlife Habitat Assessment Report.
November 7, 2023.
Supreme Court of the United States. Sackett Et Ux. V Environmental Protection Agency Et Al. May 25,
2023. https://www.epa.gov/system/files/documents/2023-05/Sackett%20Opinion.pdf.
USACE and Environmental Protection Agency (EPA). 2023a. “Revised Definition of Waters of the
United States.” 88 FR 3004. January 18, 2023.
USACE and EPA. 2023b. Revised Definition of “Waters of the United States”; Conforming. Final
Rule. Federal Register. Volume 88, Number 173 (33 CFR Part 328, 40 CFR Part 120).
September 8, 2023.
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Appendix A – Site Plans
CURRENT ROCKBULKHEAD LOCATION50'CONCRETESTEPSFIRE PITEX. SINGLE FAMILYRESIDENCEBROKEN EDGECONCRETEDECK10" PVC PIPEREMAINS OFEXPOSEDPVC PIPESLOPE FAILUREBOUNDARYD U M A S B A Y
CONCRETEDRIVEWAYCONCRETERETAININGWALLWOODSTEPSCONCRETE BLOCKRETAINING WALLAPPROXIMATE OHWBETWEEN FLAGS A2 & A3DATE: 9/25/2023SHEET:Soundview Consultants LLC
WWW.SOUNDVIEWCONSULTANTS.COM
GIG HARBOR, WASHINGTON 98335
2907 HARBORVIEW DRIVE
F
P
Environmental Assessment
. 253.514.8954
. 253.514.8952
Planning Land Use Solutions
SW DASH POINT ROAD
3620 SW DASH POINT ROAD
FEDERAL WAY, WA 98023
KING COUNTY
PARCEL NUMBER(S):
6613500030
SOURCES:JOB: 2583.0001BY: MWSCALE: AS SHOWNEXISTING CONDITIONS1VICINITY MAPSOURCE: ESRI (ACCESSED 9/25/2023)LOCATIONTHE NE 14 OF SECTION 11,TOWNSHIP 21N, RANGE 3E WMAPPLICANT/OWNERNAME:DBA "OFF THE PORCH"ADDRESS:7001 SEAVIEW AVE NW, STE 160 pmb 43SEATTLE, WA 98117CONTACT:JOHN STEVENSONPHONE:(206) 375-8735E-MAIL:JOHNERRICSTEVENSON@GMAIL.COMENVIRONMENTAL CONSULTANTSOUNDVIEW CONSULTANTS LLC2907 HARBORVIEW DRIVEGIG HARBOR, WA 98355(253) 514-8952SITESW DASH
POINT
RD0GRAPHIC SCALE1"=20408020'SHEET INDEXSHEETNUMBERSHEET TITLE1EXISTING CONDITIONS2PROPOSED MITIGATION PLAN3PLANTING PLANPLAN LEGENDPROPERTY LINEDUMAS BAY -- ORDINARY HIGH WATER LINEOHW (ORDINARY HIGH WATER)FLAG LOCATION50-FT BUFFEREXISTING CONTOURO-#EXISTING CONDITIONSOHW-A4OHW-A3OHW-A2OHW-A1D U M A S B A YDUMASBAY PARKDUMASBAY CENTRE
ROCK BULKHEAD TO BEREPAIRED IN PLACE BYRESTACKING ORIGINALMATERIAL ONTOEXISTING BASE50'CONCRETESTEPSFIRE PITEX. SINGLE FAMILYRESIDENCEBROKEN EDGECONCRETEDECKSLOPE FAILUREBOUNDARYD U M A S B A Y
CONCRETEDRIVEWAYCONCRETERETAININGWALLWOODSTEPSSTEEL WIRE MESHGROUND/ROCKNAIL, TYP.WOOD RETAININGWALL W/ STEELPILES, TYP.CONCRETE BLOCKRETAINING WALLDATE: 9/25/2023SHEET:Soundview Consultants LLC
WWW.SOUNDVIEWCONSULTANTS.COM
GIG HARBOR, WASHINGTON 98335
2907 HARBORVIEW DRIVE
F
P
Environmental Assessment
. 253.514.8954
. 253.514.8952
Planning Land Use Solutions
SW DASH POINT ROAD
3620 SW DASH POINT ROAD
FEDERAL WAY, WA 98023
KING COUNTY
PARCEL NUMBER(S):
6613500030
SOURCES:JOB: 2583.0001BY: MWSCALE: AS SHOWNPROPOSED MITIGATION PLAN20GRAPHIC SCALE1"=10204010'PLAN LEGENDPROPERTY LINEDUMAS BAY -- ORDINARY HIGH WATER LINE50-FT BUFFEREXISTING CONTOURPROPOSED MITIGATION PLAN
ROCK BULKHEAD TO BEREPAIRED IN PLACE BYRESTACKING ORIGINALMATERIAL ONTOEXISTING BASE50'CONCRETESTEPSFIRE PITEX. SINGLE FAMILYRESIDENCEBROKEN EDGECONCRETEDECKSLOPE FAILUREBOUNDARYD U M A S B A Y
CONCRETEDRIVEWAYCONCRETERETAININGWALLWOODSTEPSSTEEL WIRE MESHGROUND/ROCKNAIL, TYP.WOOD RETAININGWALL W/ STEELPILES, TYP.CONCRETE BLOCKRETAINING WALLPLANTING PLAN LEGENDWETLAND IMPACTSBUFFER ENHANCEMENT1,092 SF(INCLUDES REMOVAL OF EXISTING ENGLISH IVY)BUFFER RESTORATION1,126 SFSTEEL MESH PLANTINGS1,547 SFTOTAL PLANTED AREAS:3,765 SFDATE: 9/25/2023SHEET:Soundview Consultants LLC
WWW.SOUNDVIEWCONSULTANTS.COM
GIG HARBOR, WASHINGTON 98335
2907 HARBORVIEW DRIVE
F
P
Environmental Assessment
. 253.514.8954
. 253.514.8952
Planning Land Use Solutions
SW DASH POINT ROAD
3620 SW DASH POINT ROAD
FEDERAL WAY, WA 98023
KING COUNTY
PARCEL NUMBER(S):
6613500030
SOURCES:JOB: 2583.0001BY: MWSCALE: AS SHOWNPLANTING PLAN30GRAPHIC SCALE1"=10204010'PLAN LEGENDPROPERTY LINEDUMAS BAY -- ORDINARY HIGH WATER LINE50-FT BUFFEREXISTING CONTOURPLANTING PLANPLANT SCHEDULE
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Appendix B – Qualifications
All determinations and supporting documentation, including this Conceptual Mitigation Plan
prepared for the Southwest Dash Point Road project were prepared by, or under the direction of,
Racheal Villa of SVC. In addition, report preparation was completed by Catherine Mills. The final
report on review and quality control was completed by Rachael Hyland.
Racheal Villa
Principal and Senior Fisheries Biologist
Professional Experience: 17 years
Racheal Villa is a Principal and Senior Fisheries Biologist with a diverse background in both freshwater
and marine ecology with emphasis in salmonid life histories and habitat. She has experience in
assessing marine, shoreline, stream, and wetland systems, reporting on biological evaluations,
permitting, and site assessments.
Racheal earned a Bachelor of Science degree in Fisheries Biology from the University of Washington,
Seattle, with additional graduate level training in salmonid behavior and life history; restoration of fish
communities and habitats in river ecosystems; biological problems with water pollution; and
biomonitoring and assessment.
In addition, she has received formal training in Compensatory Mitigation and Restoration Projects,
Determining the Ordinary High Water Mark, the revised Washington State Wetland Rating System,
Selecting Wetland Mitigation Sites Using a Watershed Approach from the Washington State
Department of Ecology; Biological Assessment Preparation for Transportation Projects from the
Washington State Department of Transportation; and Seagrass Biology, Delineation, and Mapping
from the United States Army Corps of Engineers. She is also a Pierce County qualified Fisheries
Biologist and qualified Wetland Specialist.
Catherine Mills
Environmental Scientist
Professional Experience: 3 years
Catherine Mills is a Staff Scientist with a background in fish, wildlife, and conservation biology in
Colorado State. Catherine earned her Bachelor of Science degree in Conservation Biology from
Colorado State University, Fort Collins. There she received extensive, hands-on experience working
in lab and field settings, and studying wildlife management, biodiversity and natural resource policy.
Catherine also spent a semester abroad at Lincoln University in Christchurch New Zealand, where
she studied island ecology, wildlife management and environmental planning. One of her more
exceptional projects was constructing a research proposal entitled, Impacts of Anthropogenic
Pollutants on Fibropapillomatosis in Chelonia mydas in Florida. This project required research, report
writing, project budgeting, and an extensive methodology for data analysis. Amidst her undergraduate
career, Catherine also interned in the Pollination Lab at CSU. There she conducted research to study
the role phytochemicals play on honeybee health, through field work, data collection, and chemical
assays.
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Conceptual Shoreline Vegetation Management Conservation Plan November 7, 2023
Catherine currently assists in wetland, stream, and shoreline delineations and fish and wildlife habitat
assessments; conducts environmental code analysis; and prepares environmental assessment and
mitigation reports, biological evaluations, and permit applications to support clients through the
regulatory and planning process for various land use projects.
Rachael Hyland, PWS, Certified Ecologist
Senior Environmental Scientist
Professional Experience: 10 years
Rachael Hyland is a Senior Environmental Scientist with extensive wetland and stream delineation
and regulatory coordination experience. Rachael has a background in wetland and ecological habitat
assessments in various states, most notably Washington, Connecticut, Massachusetts, Rhode Island,
and Ohio. She has experience in assessing wetland, stream, riparian, and tidal systems, as well as
complicated agricultural and disturbed sites. She currently performs wetland, stream, and shoreline
delineations and fish and wildlife habitat assessments; conducts environmental code analysis; and
prepares environmental assessment and mitigation reports, biological evaluations, and permit
applications to support clients through the regulatory and planning process for various land use
projects. She also has extensive knowledge of bats and their associated habitats and white nose
syndrome (Pseudogymnoascus destructans), a fungal disease affecting bats which was recently documented
in Washington.
Rachael earned a Bachelor of Science degree in Ecology and Evolutionary Biology from the University
of Connecticut, with additional ecology studies at the graduate level. Rachael is a Professional Wetland
Scientist (PWS #3480) through the Society of Wetland Scientists as well as a Certified Ecologist
through the Ecological Society of America. She has completed 40-hour wetland delineation training
for Western Mountains, Valleys, & Coast and Arid West Regional Supplement, in addition to formal
training for the Northcentral and Northeast supplement, and experience with the Midwest, Eastern
Mountains and Piedmont, and Atlantic and Gulf Coast supplements. She has also received formal
training from the Washington State Department of Ecology in the Using the Revised 2014 Wetland
Rating System for Western Washington, How to Determine the Ordinary High Water Mark,
Navigating SEPA, Selecting Wetland Mitigation Sites Using a Watershed Approach, Wetland
Classification, and Using the Credit-Debit Method for Estimating Mitigation Needs. Rachael has also
received training from the Washington State Department of Transportation in Biological Assessment
Preparation for Transportation Projects and is listed by WSDOT as a junior author for preparing
Biological Assessments. Rachael is a Pierce County Qualified Wetland Specialist and Wildlife Biologist.