REVIEWED PLN_CriticalAreasStudy_by alexander callendar_2020.12.21RES U B
Jan 20 2021 BLD2020-0733
CITY OF EDMONDS
DEVELOPMENT SERVICES
DEPARTMENT
Pichner Landscape Improvements and Riparian Restoration —
Edmonds, Washington
CRITICAL AREAS, HABITAT MANAGEMENT PLAN, AND
RESTORATION REPORT
Prepared For:
Chris Pichner
EDMONDS, WASHINGTON
Prepared By:
ALEXANDER CALLENDER, M.S. PWS
LAND SERVICES NORTHWEST LLC
OLYMPIA, WASHINGTON
December 21. 2020
Goloborodko Restoration Plan Wetland and Stream Analysis Report
Table of Contents
1.0 Introduction and Narrative
2.0 General Property Description and Land Use
2.1 Current Land Use
Figure 1— Vicinity Map
3.0 Existing Information Review
3.1 Analysis of Existing Information
National Wetland Inventory (NWI) map
NRCS Soils Map
Alderwood Soil Series
WADNR National Forest Practices Map
USGS Topo Map
WDFW Priority Habitats and Species Inventory
WDFW Salmonscape
4.0 DESCRIPTION OF CRITICAL HABITATS AND SPECIES
4.1 Riparian Habitat
4.2 Critical Fish Species/Habitat
5.0 REGULATORY REVIEW
5.1 City of Edmonds Critical Areas Code
Fish and Wildlife Habitat Conservation Areas (FWCA's)
Recommended Buffers
6.0 ANALYSIS OF PROJECT
6.1 Existing Conditions
6.2 Project Description
6.3 Impacts Analysis
7.0 WATER QUALITY PROVISIONS
7.1 Water Quality Impacts and BMPS
Figure 4 Site Plan — After -the -Fact
8.0 MITIGATION PLAN
8.1 Impacts
8.2 Mitigation Objectives
8.3 Buffer Mitigation Functions
Table 1 - Buffer Functions Comparison Before and After Mitigation
8.4 Planting plan
Figure 6 Insert
Table 2 Tree/Shrub Species Quantity and Spacing (3,812 sq ft)
Table 3 Total Costs
8.4 Performance Standards and Monitoring
9.0 CONTINGENCIES
10.0 CONCLUSIONS
11.0 REFERENCE:
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Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
1.0 INTRODUCTION AND NARRATIVE
This report is the result of a study conducted of the .39 acre property at 8120 TALBOT RD, tax parcel
#00594400008802, in the City of Edmonds with the legal description of ALBOT PARK BLK 000 D-02 - ALL
TH PTN TR 88 DAF BEG AT MOST ELYCOR TR 88 TH S24*32 34W 299.89FT TO MOST SLY COR SD TR TH
N58*34 OOW ON SWLY LN SD TR DIST OF 50FT TH N28*00 00E142FT TH N00*53 52W 99.48FT TAP ON S
LNTALBOT RD TH IS 120.3FT WLY MEAS ALG SD RD LN FR POB TH ELY ALG SD RD LN 120 .3FT POB in
Snohomish County (Figure 1).
The purpose of this report is to 1) identify and describe the wetlands, streams or other critical habitats
on -site and within 300 ft of the property 2) identify impacts to streams or critical areas and their buffers,
and 3) apply management and restoration / conservation measures to off -set any impacts to critical
areas or buffer impacts caused by the project. This restoration considered the landscape impacts and
restores the condition to the buffer without creating further impacts to the area. It will use bmps in
order to meet the needs of the City of Edmonds Critical Areas Codes.
The City of Edmonds and possibly other agencies that may evaluate impacts to critical areas from the
proposed project will be able to utilize information in this report.
2.0 GENERAL PROPERTY DESCRIPTION AND LAND USE
2.1 Current Land Use
Currently, the subject property has a single-family residence with various decks, a driveway for
ingress and egress and a walkway down the hillside with landscape features and decks. The
property is surrounded by single-family residences to the west and east and has slope to Perrinville
Creek and back up the other side of the Creek (Figure 2). The property has a slope to the southwest
and on this slope on the North side of the creek a deck was installed
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Figure 1— Vicinity Map
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Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Figure 2 — Current Land Use
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3.0 EXISTING INFORMATION REVIEW
The following existing information was reviewed prior to the reconnaissance /delineation
Background Review
Background information on possible wetlands was reviewed prior to field investigations and
included the following:
• National Wetlands Inventory (NWI) Map, USFWS Shapefile Data (Appendix B)
• Snohomish County Area Soil Survey, Soil Conservation Service (U.S. Department of Agriculture,
1973) National Resource Conservation Service Shapefiles (NRCS Soils Data Mart, 2006)
(Appendix C)
• Snohomish County Shapefiles, Parcel Shapefiles, and Topography Shapefiles
• USGS 7.5 Minute Quadrangle Topographic Maps (Appendix D)
• Snohomish County Parcel Map (Appendix E)
• National Hydrography Dataset (Appendix F)
• Washington Department of Fish and Wildlife Priority Habitats and Species Database
• Washington Department of Natural Resources Natural Heritage Database
• United States Hydric Soils List (U.S. Department of Agriculture 1991)
• City of Edmonds Code
• Quality Geo Geotechnical Study (Appendix H)
3.1 Analysis of Existing Information
The following existing information was reviewed to gain a better understanding of onsite conditions
and its position in the landscape.
National Wetland Inventory (NWI) map
The National Wetland Inventory (NWI) map (Appendix B), developed by the U.S. Fish and Wildlife
Service (USFWS), shows Perrinville Creek as an R4SBC which is Riverine Intermittent Stream Bed
Seasonally Flooded.
NRCS Soils Map
The Natural Resources Conservation Service (NRCS) has mapped the site (Appendix C) as
containing:
Alderwood Soil Series
Landscape --glacial drift plains
Landform--glacially modified hills and ridges
Slope--0 to 65 percent
Parent material-- glacial drift and outwash over dense glaciomarine deposits
Mean annual precipitation --about 1000 mm
Mean annual temperature --about 10 degrees C
Depth class --moderately deep to densic contact
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Drainage class --moderately well drained
Soil moisture regime--xeric
Soil temperature regime--mesic
Soil moisture subclass--aquic
TAXONOMIC CLASS: Loamy -skeletal, isotic, mesic Aquic Dystroxerepts
TYPICAL PEDON: Alderwood gravelly sandy loam, forested
A- 0 to 18 cm; gravelly sandy loam, brown (10YR 5/3) dry, very dark grayish brown
(10YR 3/2) moist; moderate fine granular structure; slightly hard, very friable, slightly
sticky and slightly plastic; many fine roots; few fine irregular pores; 20 percent
gravel; moderately acid (pH 5.8); abrupt smooth boundary
TYPE LOCATION: Snohomish County, Washington; about 8 km east of Lynnwood on
Maltby road; 61 m south and 122 m east of the center of sec. 28, T. 27 N., R. 5 E.,
Willamette Meridian; Bothell, Washington, U.S. Geological Survey quadrangle;
latitude: 47.798000, longitude: 122.176000 degrees west, WGS84 (coordinates
estimated from PLSS details)
RANGE IN CHARACTERISTICS:
*Mean annual soil temperature--10 to 12 degrees C
*Soil moisture control section --dry 60 to 75 consecutive days following the summer
solstice
*Depth to densic contact--50 to 100 cm
*Depth to redoximorphic features with chroma of 2 or less--45 to 75 cm
*Reaction (pH)--5.1 to 6.5
Particle -size control section (weighted average):
*Clay content: 5 to 15 percent
*Rock fragments: 35 to 65 percent
A horizon
Hue--10YR or 7.5YR
Value--2 or 3 moist, 3 to 5 dry
Chroma--2 to 4, moist or dry
Total fragments--15 to 65 percent
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Gravel content--15 to 65 percent
Cobble content--0 to 5 percent
Stone content--0 to 5 percent
Thickness--5 to 20 cm
GEOGRAPHIC SETTING:
Elevation--0 to 250 m
Mean annual precipitation--410 to 1500 mm
Mean annual air temperature--9 to 11 C
Frost free period--180 to 240
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
*Drainage class --moderately well drained
*Depth to perched seasonal water table--30 to 90 cm at times in December through
April
*Flooding --none
*Ponding--none
*Saturated hydraulic conductivity (Ksat)--high saturated hydraulic conductivity above
the densic contact and low saturated hydraulic conductivity in the densic material
USE AND VEGETATION:
*Use --timber production, crop production, wildlife habitat, watershed
*Potential natural vegetation-- Douglas -fir, western hemlock, western redcedar, red
alder with an understory of salal, Oregon -grape, western brackenfern, western
swordfern, Pacific rhododendron, red huckleberry, evergreen huckleberry, and
orange honeysuckle.
WADNR National Forest Practices Map
The Department of Natural Resources has a GIS shapefile of stream and waterbody hydrography
and Types that show Perrinville Creek as a type F Stream near the property (Appendix D).
USGS Topo Map
The USGS topographical maps displays natural and built features on the landscape such as
buildings, wetlands, streams and lakes. This map shows web map does not show any wetlands
within 315 feet of the subject property (Appendix E).
WDFW Priority Habitats and Species Inventory
The Department of Fish and Wildlife maintains an inventory of priority habitats and species
information. This database did not show any priority habitats or species
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WDFW Salmonscape
The WDFW Salmonscape map shows Perrinville Creek as crossing the property and draining to the
Puget Sound. This map shows fish use by Coastal Cutthroat trout.
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4.0 DESCRIPTION OF CRITICAL HABITATS AND SPECIES
4.1 Riparian Habitat
There exists a deep swale on the southern portion of the property. At the bottom of the swale is
Perrinville Creek. Like many creeks in urban areas, Perrinville Creek is surrounded by single family
homes at the top of the slope so maintaining natural flows becomes more difficult as the
impervious surfaces from this development will produce a change in the delivery of stormwater to
the system. Along with the increased runoff, an increase in erosion could become an issue and
increased flooding and downcutting.
The creek itself is approximately three to six feet wide and has various pools and glides which flow
to the north and west where it empties to the Puget Sound. Because the side slopes that lead to
the creek are steep, water does not seem to dwell and create wetland conditions as it travels
downslope. There were no wetlands or seeps found along the stream and it appeared to be
relatively intact and without the downcutting that is so often found in these situations. The
creekbank and riparian area is mostly invasive species which consists primarily of English ivy,
Himalayan blackberry and English holly.
4.2 Critical Fish Species/Habitat
The Perrinville Creek does not appear to have critical habitat for any threatened or endangered
species, although rheotropic fish could enter the system. The WDFW Salmonscape and Priority
Habitats and species map shows Resident Cuthroat trout use and the wetted bankfull width
indicates fish bearing as it is less than 16% grade and there are no blockages noted. The WADNR
Forest Practice Stream Type Map has it listed as a Type F stream.
5.0 REGULATORY REVIEW
5.1 City of Edmonds Critical Areas Code
The City of Edmonds regulates critical areas under Chapter 23 Environmental Areas 23.40.060 General
requirements.
B. If the proposed project is within, adjacent to, or is likely to impact a critical area, the director shall:
1. Require a critical areas report from the applicant that has been prepared by a qualified professional;
2. Review and evaluate the critical areas report;
3. Determine whether the development proposal conforms to the purposes and performance standards of this title,
including the criteria in ECDC 23.40.160, Review criteria;
Fish and Wildlife Habitat Conservation Areas (FWCA's)
Perrinville Creek
Perrinville Creek is found on and offsite and transects the property in an east west direction with flow to
the west.
Fish and wildlife habitat conservation areas in the city of Edmonds include:
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1. Streams. Within the city of Edmonds streams shall include those areas where surface
waters produce a defined channel or bed which demonstrates clear evidence, such as the
sorting of sediments, of the passage of water. The channel or bed need not contain water
year-round. Streams shall be classified in accordance with the Washington Department of
Natural Resources water typing system (WAC 222-16-030) hereby adopted in its entirety by
reference and summarized as follows:
a. Type S: streams inventoried as "shorelines of the state" under Chapter 90.58 RCW
and the rules promulgated pursuant to Chapter 90.58 RCW;
b. Type F: streams which contain fish habitat;
c. Type Np: perennial nonfish habitat streams; and
d. Type Ns: seasonal nonfish habitat streams.
All streams included on the inventory that are known to exist within the city of Edmonds do not
meet criteria for "shorelines of the state" but contain fish habitat and, thus, meet designation
criteria for Type F waters pursuant to WAC 222-16-030. However, not all Edmonds streams
support anadromous fish populations or have the potential for anadromous fish occurrence
because of obstructions, blockages or access restrictions resulting from existing conditions.
Therefore, in order to provide special consideration of and increased protection for
anadromous fish in the application of development standards, Edmonds streams shall be
further classified as follows:
Anadromous fishbearing streams: streams existing in whole or in part within the city of
Edmonds in which anadromous fish are known to occur. As of 2004, Edmonds fishbearing
streams are known to include Willow Creek, Shellabarger Creek, Shell Creek, Hindley Creek,
Perrinville Creek, and Lunds Creek; and
B. Areas Addressed in Critical Areas Report. The following areas shall be addressed in a
critical areas report for fish and wildlife habitat conservation areas:
1. The project area of the proposed activity;
2. All fish and wildlife habitat conservation areas and recommended buffers within 200 feet of the
project area;
3. All shoreline areas, floodplains, other critical areas, and related buffers within 200 feet of the
project area; and
4. A discussion of the efforts to avoid and minimize potential effects to these resources and the
implementation of mitigation/enhancement measures as required.
Recommended Buffers
The recommended stream buffer are as follows as found in EMC 23.90.040 Development standards — Specific
habitats.
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D. Streams. No alteration to a stream or stream buffer shall be permitted unless consistent with the provisions of this
title and the specific standards for development outlined below.
1. Standard Stream Buffer Widths. Buffers for streams shall be measured on each side of the stream, from the
ordinary high water mark. The following shall be the standard buffer widths for streams based upon the Washington
State Department of Natural Resources water typing system and further classification based upon fish presence
(fishbearing vs. nonfishbearing) for the Type F streams existing in the city of Edmonds:
a. Type S: 150 feet;
b. Type F anadromous fishbearing stream adjacent to reaches with anadromous fish access: 100 feet;
c. Type F anadromous fishbearing stream adjacent to reaches without anadromous fish access: 75 feet;
d. Type F nonanadromous fishbearing stream: 75 feet;
e. Type Np: 50 feet;
f. Type Ns: 40 feet.
General areas and stream reaches with access for anadromous fish are indicated on the city of Edmonds critical areas
inventory. The potential for anadromous fish access shall be confirmed in the field by a qualified biologist as part of
critical areas review and determination of standard stream buffer widths.
2. Reduced Stream Buffer Widths. Standard stream buffer widths may be reduced by no more than 25 percent of the
standard stream buffer width concomitant to development and implementation of a stream buffer enhancement plan
approved by the director. Reduced stream buffer widths shall only be approved by the director if a stream buffer
enhancement plan conclusively demonstrates that enhancement of the reduced buffer area will not degrade the
quantitative and qualitative functions and values of the buffer area in terms of fish and stream protection and the
provision of wildlife habitat. Stream buffer enhancement plans must meet the specific requirements of
ECDC 23.40.110, 23.40.120 and 23.40.130 and:
a. The buffer enhancement plan proposed as part of buffer reduction provides evidence that functions and values in
terms of stream and wildlife protections will be:
i. Increased or retained through plan implementation for those streams where existing buffer vegetation is generally
intact; or
ii. Increased through plan implementation for those streams where existing buffer vegetation is inadequate to protect
the functions and values of the stream;
b. The plan documents existing native plant densities and provides for increases in buffer native plant densities to no
less than three feet on center for shrubs and eight feet on center for trees;
c. The plan requires monitoring and maintenance to ensure success for a minimum of five years in accordance with
ECDC 23.40.130(D) and (E); and
d. The plan specifically documents methodology and provides performance standards for assessing increases in
stream buffer functioning as related to:
i. Water quality protection;
ii. Provision of wildlife habitat;
iii. Protection of anadromous fisheries;
iv. Enhancement of fish habitat; and
v. Restricting intrusion and disturbance.
3. Stream Buffer Width Averaging with Enhancement. The director may allow modification of a standard stream
buffer width in accordance with an approved critical areas report and the best available science on a case -by -case
basis by averaging buffer widths. Any allowance for averaging buffer widths shall only be granted concomitant to
the development and implementation of a buffer enhancement plan for areas of buffer degradation. Only those
portions of a stream buffer existing within the project area or subject parcel shall be considered in the total buffer
area for buffer averaging. Averaging of buffer widths may only be allowed where a qualified professional
demonstrates that:
a. The buffer enhancement plan proposed as part of buffer averaging provides evidence that functions and values in
terms of stream and wildlife protections will be:
i. Increased or retained through plan implementation for those streams where existing buffer vegetation is generally
intact; or
ii. Increased through plan implementation for those streams where existing buffer vegetation is inadequate to protect
the functions and values of the stream;
b. The total area contained in the buffer area, or the total buffer area existing on a subject parcel for a stream
extending off site, after averaging is no less than that which would be contained within the standard buffer; and
c. The buffer width at any single location is not reduced by more than 25 percent of standard width.
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Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
The plan which is developed in this proposal will be consistent with these provisions.
7. Trails. After reviewing the proposed development and technical reports, the director may
determine that a pedestrian -only trail may be allowed in a stream buffer; provided,
pervious materials are used, all appropriate provision is made to protect water quality, and
all applicable permit requirements have been met. No motorized vehicles shall be allowed
within a stream or its buffer except as required for necessary maintenance or security.
Vegetative edges, structural barriers, signs or other measures must be provided wherever
necessary to protect streams by limiting vehicular access to designated public use or
interpretive areas.
a. No other location is feasible;
b. Pipes and conveyance facilities will be in the outer 25 percent of the buffer;
c. Storm water dispersion outfalls, bioswales, and bioretention facilities may be allowed
anywhere within stream buffers;
d. Such facilities are designed consistent with requirements of Chapter 18.30 ECDC; and
e. The location and function of such facilities will not degrade the functions or values of
the stream or stream buffer.
9. City Discretion in Protection, Enhancement and Preservation of Streams. The city of
Edmonds is unique within the state of Washington as a built -out community with streams that
have been incorporated within, and often located immediately adjacent to, residential
development. This title allows the director full discretion to condition proposals for development
on parcels containing, adjacent to, or potentially impacting streams to enhance conditions
consistent with ECDC 23.40.050 and the purposes and objectives of this title. Conditions on
development shall be required to enhance streams and stream buffers as fish and wildlife
habitat conservation areas to provide increased protection of anadromous fisheries and
potential fish habitat in accordance with best available science and the recommendations of an
approved critical areas report and may include:
a. Removal of stream bank armoring;
b. In -stream habitat modification;
c. Native planting;
d. Relocation of stream channel portions to create contiguous riparian corridors or wildlife
habitat;
e. Planting of stream bank native vegetation to increase stream shading;
f. Removal and control of nonnative, invasive weed species;
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Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
g. Requiring additional building setbacks or modified buffers; and
h. Limiting or reducing the types or densities of particular uses.
The right of discretion in provisioning development in regard to streams is maintained in order
to provide for the creation of enhanced conditions over those currently existing around streams
in the city of Edmonds. In all instances where an applicant cannot demonstrate that standard
stream buffer widths as provided in subsection (D)(1) of this section can be accommodated by
project development, the applicant shall be required to submit a stream buffer enhancement
plan or a stream mitigation and buffer enhancement plan as part of a critical areas report
indicating that post -project site conditions will provide equivalent or greater protection of
stream functions and fish habitat over a standard stream buffer and existing site conditions.
[Ord. 4026 § 1 (Att. A), 2016; Ord. 3527 § 2, 2004].
Figure
23.90.000
CITY OF EDMONDS CRITICAL AREAS
Critical Areas Compliance Requirements*
Fish and Wildlife Habitat Conservation Areas
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Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Stream Delineation with 200-foot Buffer
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Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
6.0 ANALYSIS OF PROJECT
6.1 Existing Conditions
There is a relatively steep slope which leads to the Perrinville Creek just south of the residence.
Overland flow does not seem to be eroding the slope and the vegetation is mostly invasive species with
a few different trees about 14-18 inches dbh. There are retaining walls, a natural rock path to the
slopeside decks and a railing on the decks for safety.
6.2 Project Description
The project is an after -the -fact permit to allow the retention of the previously installed retaining walls
that are part of a graded deck and a pedestrian walking path to the landscape amenities within the 75 -
foot and 25% reduced Fish and Wildlife Habitat Conservation area of Perrinville Creek. (Figure 4)
6.3 Impacts Analysis
The Type F stream traverses the site in a east to west direction with at the base of a steep valley.
The walls and deck are located in the 75 foot buffer and the 25% reduced buffer and will require
mitigation to maintain stream functions and values.
Vegetation Removal
The project area has had vegetation removal in the relatively small area of the walls and deck. This
area was mostly invasive species according to the applicant. He has installed also non-native not
invasive ornamental shrubs installed on the top of the walls and fruit trees (Apples) beside the walls
which should offset some of the project impacts, however these plants are best suited for the
planting beds in which they were planted whereas the other plants will be planted on the slope and
their roots will add to the overall stability of the area as their root systems are more substantial
than the invasive species' which they will be replacing.
Slopes and Restoration
The applicant has had a geotechnical investigation of the restoration area by a qualified geological
engineer. The walls that were currently greater than 4-feet will be redesigned to be less than four
feet tall to limit the load that they bear on the slopes. The slopes have been determined not to be a
landslide hazard by a competent geotechnical professional. According to the report, if the applicant
provides the drainage that is recommended to limit erosion, it appears that there will be no
landslide hazard in the future as erosion should not be a problem.
The slopes were determined not to put anything at risk if the drainage is maintained, gathered, and
released at the toe of the slope.
7.0 WATER QUALITY PROVISIONS
7.1 Water Quality Impacts and BMPS
Water quality impacts could arise from the grade and fill activities if done improperly. BMP's from the
2012 Department of Ecology's Stormwater Management Manual will implemented make sure that the
project will not discharge turbid water off -site or to the stream. Work will be done in the dry season,
although we do not expect to operate any large equipment to accomplish the project, any equipment
will be checked daily for leaks. Refueling and lubrication of equipment will occur away from the slope.
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Fuel, lubricants, chemicals, or hazardous substances will not be stored overnight within the project area.
Construction fencing will be installed at the construction limits. Silt fences and straw wattles will be
Figure 4 Site Plan — After -the -Fact
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Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
installed downslope from any disturbed earth and all earth disturbance will be limited to the
minimum necessary to achieve the purpose. No equipment or debris will be stored in the
buffer. Stormwater from the home and nearby impervious surfaces will be directed away
from the area until the vegetation has established. The bare slope will be mulched with 4
inches of mulch as soon as possible to prevent erosion. The work will be done when the
danger of turbid discharge to the stream is minimized in the late spring. The slopes will be
watered as needed to promote vegetation growth, but not so much that it will cause erosion.
All plant installations will be done by hand to minimize the potential for erosion. Mulch will
be applied four inches thick in order to improve moisture retention and reduce erosion.
8.0 MITIGATION PLAN
8.1 Impacts
The project will mitigate for the unavoidable impacts to 1,452 square feet of riparian habitat
through the removal of invasive species such as English ivy and Himalayan blackberry and
replanting of 3,812 square feet with a robust combination of groundcover, shrubs and trees.
These plants will lead to an improvement of functions and diversity over the existing
conditions. A net gain or positive impact is expected in landscape roughness, habitat
screening, food source, nutrient uptake and aesthetics and overall habitat resilience (Figure
5).
8.2 Mitigation Objectives
We will mitigate for the removal of vegetation and the installation of lawn, steps and walls by
providing a revegetation plan that will meet the projects objectives to:
a. Improve habitat as a food source and screening for wildlife
b. Prevent erosion
c. Discourage intrusion/degradation of the buffer
d. Provide aesthetic benefits for the residents in the viewshed of the project
e. Stem the intrusion of invasive species a
8.3 Buffer Mitigation Functions
If the buffer enhancement performs as expected, we canexpect the following lift in functions. The semi quantitative
method used in the Wetland Rating System (ECY, 2014) was adapted as the resolution of performance lift is only
valid to the semi quantitative Low, Medium, and High
Table 1 - Buffer Functions Comparison Before and After Mitigation
Buffer Perf
Screening
Nutrient
Snags
Other
Structure
Surface
Temperature
Erosion
criteria
uptake
and
Habitat
roughness
attenuation
control
Los
Features
Before
Low
Meidum
Low
Medium
Medium
Medium
Low
Medium
mitigating
measures
After
High
High
Low
Medium
High
High
High
High
mitigating
measures
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Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
8.4 Planting plan
The planting plan is provided. Trees will be planted at grade in holes 1-2 times the width of
the container or root ball. The mulch will be applied around each tree 2-4 inches deep in a
two -foot diameter around the tree with an edge to retain water. Rootbound trees will be cut
with sharp shears on the bottom in an x pattern to promote root growth. Four cuts will be
made vertically to allow roots to spread. Trees will be thoroughly watered in after
installation.
Shrubs will be installed in a similar manner.
The species selected are typical native northwest species that usually survive our summers;
however, it may be necessary to irrigate during the first two years to ensure survival. The
watering will be the minimal necessary to avoid creating erosion.
All retaining walls will be planted with kinnikinic to provide screening from the walls.
The first 15 feet along the creek will be planted with shrubs like Red osier dogwood, Pacific
ninebark and Twinberry to provide erosion protection and structure over the creek which will
provide allochthonous inputs like macroinvertebrates for the fish below.
The second thirty feet will be primarily trees like Sitka spruce, Western hemlock and
Western red cedar and Red flowering currant to provide shade that will attenuate
temperatures and eventually shade out the invasive species that have become prevalent in
the area.
The remaining area near the walls will be planted with groundcover (Salal and Roses) for
erosion protection.
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Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Figure 6 Insert
18
Land Services Northwest December 15, 2020
75 — FT TYPE F
STREAM BUFFER
52.5 — FT 25%
REDUCED STREAM
BUFFER
282)SQ F
SQ
LANDSERVICES NW FIGURE 6 Scale: 1" = 50' ® ZONE 1 (1743 A FT)
120 STATE AVE NE #190 SITE PLAN WITH PLANTING
ZONE 2 C1768 SQ FT)
❑LYMPIA, WA 98501(k ZONES ®
360-481-4208 (NOT A SURVEY)
ZONE 3 (282 SQ FT)
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Table 2 Tree/Shrub Species Quantity and Spacing (3,812 sq ft)
Common
Scientific
Spacing
Zone
Quantity
Cost per
Total
Name
Name
unit
Western
Tsuga
15 ft
2
5
$5.00
$25.00
Hemlock
heterophylla
Western red
Thuja plicata
15 ft
2
5
$5.00
$25.00
cedar
Sitka spruce
Picea
15 ft
2
5
$20.00
$100.00
sitchensis
Clustered
Rosa
5 ft
3
5
$5.00
$25.00
rose
pl socar a
Nootka rose
Rosa nutkana
5 ft
3
5
$5.00
$25.00
Red
Ri bes
loft
2
10
$10.00
$100.00
flowering
sanguineum
current
Red osier
Corpus alba
5 ft
20
5
$5.00
$100.00
dogwood
Pacific Nine
Physocarpa
5 ft
10
5
$5.00
$25.00
bark
ca itatus
Twinberry
Lonicera
5 ft
1
5
$5.00
$25.00
involucrata
kinnikinnick
Arctostaphylos
2 ft
Walls+
20
$4.00
$80.00
uva-ursi
Salal
Goutheria
2 ft
3
20
$2.00
$40.00
shallon
Total
115
$570.00
Table 3 Total Costs
Labor
$1,000
$1000.00
Mulch
$300
$300.00
Monitoring w/re ort 5 ears
$500
$2000.00
Plants and Materials
$570.00
Total
$3925.00
8.4 Performance Standards and Monitoring
The site will be monitored for five years with the as -built as Year 0. Photo points will be
established in 2 points that capture the overall condition of the planting area. Monitoring will
begin in the spring following the installation of the plants. Year 1 will require 100 percent
survival. Year 2 must have 100 percent survival of planted native plants Years 3-5 will have
19
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
an 80% survival rate. If the survival rate is not met in the final year, the deficit will be
replanted, and the site will be monitored for 1 more year. The survival percentage will
include 10 percent of any native non-invasive volunteers. Monitoring will occur each spring
after the plants have sprouted leaves. Management will require prior removal of any
blackberries, scotch broom or holly or other invasive plants in the planting area and
replacement of any dead plants as required to meet the performance standards. A report
of management actions and photos of the area will go to the City of Edmonds Development
Center within a month following each site monitoring event.
The invasive removal area will be monitored as well. The invasive removal area will have
any non-native blackberries grubbed out. Holly will be cut down and any other invasives
encountered will be removed by hand.
9.0 CONTINGENCIES
The City will be consulted on any contingency measures that are developed. The report will
be in an email by the applicant and will include pictures that illustrate the condition of the
mitigation site.
Contingency/maintenance activities may include, but are not limited to:
1. Replacing plants lost to vandalism, drought, or disease, as necessary;
2. Irrigating the enhancement areas only as necessary during dry weather if plants appear
to be too dry, with a minimal quantity of water;
3. Remulching areas to protect from dry weather
4. Providing protection from rodents
10.0 CONCLUSIONS
Development activities accidently occurred in the riparian buffer when the applicant installed
his steps, retaining walls and other landscape amenities. A geotechnical report has shown
that these structures can safely remain without destabilizing the slopes and causing
damage to the property. The applicant has carefully considered the best options for
revegetating the slopes with vegetation that is appropriate for limiting erosion and adding
stability to the slope. This restoration will provide benefits to the area in many different
ways but most importantly, it will maintain the functions and values of the stream for the
citizens of Edmond.
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Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
11.0 REFERENCE:
Cowardin L.M., Carter V., Golet F.C., LaRoe E.T. 1979. Classification of Wetlands and Deepwater
Habitats of the United States. US Fish and Wildlife Service. Washington DC. FWS/OBS-79/31. Available
at: https://www.fws.gov/wetlands/Documents/Classificationof-Wetlands-and-Deepwater-Habitats-of-
the-U n ited-States. pdf
Lichvar, R.W., D.L. Banks, W.N. Kirchner, and N.C. Melvin. 2016. The National Wetland Plant List:
2016 wetland ratings. Phytoneuron 2016-30: 1-17. Published 28 April 2016. ISSN 2153 733X. Available
at: http://wetlandplants.usace.army.mil/nwpl_static/v33/home/home.htm
NRCS. 2020b. Web Soil Survey [Internet]. Available at:
https://websoiIsurvey.sc.egov.usda.gov/App/HomePage.htm
WA Department of Ecology, 2012, 2012 Stormwater Management Manual For Western Washington,
Lacey, WA
USACE 2005. Regulatory Guidance Letter Ordinary High Water Mark Identification. Available at:
https://www. na p.usace.a rmy.mi I/Portals/39/docs/regulatory/rgls/rgIO5-05.pdf
Washington State Department of Fish and Wildlife. 1999. Species of concern: State candidate
species. WDFW. Olympia, WA.
Washington State Department of Fish and Wildlife. 2018. PHS on the Web, Last accessessed
12/12/2020 www.wdfw.wa.gov/mapping/PHS
Wasshington `State Department of Natural Resources202Ob. Forest Practices Application Mapping Tool
— Water Typing [Internet]. Available at: https://fpamt.dnr.wa.gov/default.aspx. Water typing
descriptions are available at: https://www.dnr.wa.gov/forest-practices-water-typing.
21
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
22
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Appendix A
Photographs
23
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
24
Land Services Northwest December 15, 2020
L6
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Lack of Trees In Area
•. t R _�' - � ''�=�
� ` ire%-
��, i81
�
r
� F
' ::�
47
(Latitude 47.841798
Longitude:-122.343744
Elevation. 17.51 m -,��• _ � -
Accuracy. 10.7 m r, c+.,
c .P�r
Azimuth: 137°(SE) 141 1
!Pitch 9.2° (2.7°)_ri���.�,
"Time. 10-28-2020 11:33
'Note: Pichner
Typical Stream and Bank
26
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Looking uphill from Creek
27
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Invasive Species (To be removed)
2s
Land Services Northwest December 15, 2020
m�, •''; � � ��'��y yip
r, c
-122.3438
• .T �� ' ,'- .e rig ',���$
S �'arfs•9 3 J
• a+
• k • �.
�t �. ►AkCam .
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Latitude: 47.842131
•`_Longitude:-122.344029
- Accuracy: 156.9 m
;Azimuth: 177' (S)
Pitch: -5.0° (1.9°)
;Time: 10-28-2020 11:43
Note: Pichner
Latitude: 47.841864
Longitude:-122.343731
Elevation: 29.55 m
Accuracy: 5.3 m
Azimuth: 136° (SE)
Pitch: -20.0° (-2.6°)
Time: 10-28-2020 11:46
Note: Pichner
30
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
31
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Appendix B
USFWS
National Wetland Inventory
32
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
33
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Appendix C
NRCS Soil Map
34
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
ti Soil Map —Snohomish County Area, Washington
Id
(Appendix C - Soil Survey Map for Snohomish County) R
5'lBxO 5� 51®A 58aL 5'l9140 5510) 51918] 509Yd1 SBdtll 51aW9 581W
3 3
MapSS e: 1:2,850lfwhWon Ala>d3mpe(1Vx8.555 1.
N M a
0 90 p) 760 210
A Feat
0
Mq f+cl�^: V+tb Maw Cnrtrjovr}� ', WCS84 Edd�n¢: UIM ZaeIgJbWS83
Natural Resources Web Soil Survey 121172020
Conservation Service National Cooperative Soil Survey Page 1 of 3
35
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Soil Mep—Snohomish County Area, Washington
(Appendix C - Soil Survey Map for Snohomish County)
MAP LEGEND
MAP INFORMATION
Area of Interest (AOI)
;�A
Spoil A—
The soil surveys that comprise your AOI were mapped at
Area of Interest (AOI)
c
Stony Spot
1:24,000.
Soils
4D
Vary Story Spot
Warning: Soil Map may not be valid at this scale.
Q
Soil Map Unit Polygons
Wet Spot
Enlargement of maps beyond the scale of mapping can cause
.y
Soil Map Unit Lines
misunderstanding of the detail of mapping and accuracy of soil
8
Omer
line placement. The maps do not show the small areas of
Soil Map Unit Points
contrasting soils that could have been shown at a more detailed
Special
Point Features
e
Special Line FeaWres
scale.
V
Blowout
Water Features
Streams and Canals
Please rely on the bar scale on each map sheet for map
®
Borrow Pit
measurements.
Transportation
)K
Clay Spot
Rails
Source of Map: Natural Resources Conservation Service
Closed Depression
Web Sail Survey
�y
Inlersta[e Highways
Coordinate System:Web Mercator (EPSG:3857)
Gravel Pit
US Routes
Maps from the Web Soil Survey are based on the Web Mercator
•
,•
Grevally Spot
Major Roads
projection, which preserves direction and shape but distorts
0
Landfill
Local Roads
distance and area. A prcection that preserves area, such as the
Albers equal-area conic projection, should be used if more
i
Lava Flux
Background
accurate calculations of distance or area are required.
Marsh or swamp
.
Aerial Photogrephy
This product is generated from the USDA-NRCS certified data as
ofthe version date(s) listed below.
Mine or Quarry
Soil Survey Aree: Snohomish County Area, Washington
O
Miscellaneous water
Survey Area Data: Version 22, Jun 4, 2020
C
Perennial Water
Soil map units are labeled (as space allows) for map scales
y
Rock Outcrop
1:50,000 or larger.
Saline Spot
Date(a) aerial images were photographed: Sep 2, 2018—Sep
25, 2018
• •
Sandy Spot
The orthophoto or other base map on which the sdl lines were
p
Severely Eroded Spot
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
®
Sinkhole
shifting of map unit boundaries may be evident.
Slide or Slip
fir
Sodic Spot
USDA Natural Resources Web Soil Survey 12/17/2020
am conservation Service National Cooperative Soil Survey Page 2 of 3
36
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Soil Map —Snohomish County Area, Washington
Map Unit Legend
Appendix C - Soil Survey Map for
Snohomish County
Map Unit Symbol
Map Unit Name
Acres in AOI
Percent of AOI
4
Alderwood-Everett gravelly
2.6
8.6%
sandy Ioams, 25 to 70
percent slopes
5
Alderwood-Urban land
19.0
62.7 %
complex, 2 to 8 percent
slopes
6
Alderwood-Urban land
0.5
1.6 %
complex, 8 to 15 percent
slopes
19
Everett very gravelly sandy
4.3
14.3 %
loam, 15 to 30 percent
slopes
Totals for Area of Interest
30.2
100.0%
USDA Natural Resources Web Soil Survey 12/17/2020
Conservation Service National Cooperative Soil Survey Page 3 of 3
37
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Appendix D
WADNR Forest Practices Stream
Type Map
38
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Forest Practices Water Type Map
Map Symbols
Additional Information
Legal Description
1-/ Newstream tea. Start and End
Point of Surveyed
/`/ Proposed Water Type Reach
0 Natural Fish Barrier
.ram' Stream Removal
� Manmade Barrier
undefined
Break between End of Fish or
• water types ® Last Fish
_
i'RURREL RESOURCES
Extreme care was used during the compilation of this map to ensure
its accuracy. However, due to changes in data and the need to
rely on outside information, the Department of Natural Resources
cannot accept responsibility for errors or omissions, and therefore,
there are no warranties that accompany this material.
0 0.25
Miles
Date12/17/2020 Time: 1:40:02 AM
39
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Appendix E
USGS Topo Map
40
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
•
• • • • •' •I, ' , '� . 1' I• Y• .r .�
R 1•
•
■��
+
• • • ,hip
,i; • •• �.. •r�J ..': ;• • ..
ti:"�• '•
16
T.
IIIR
LL
•���•'�'" �;! fir•' S' •'ti'• � "`
� 1
°i
.. -LM diiiiiiI.
-LL-1 :li R
1 Li _M
Land Services Northwest
Appendix E
120 State Avenue NE PMB190 -SNvV
USGS Tapa Map
Olympia, WA98501
0 0.0225 0.045 0.09 Miles
360-481-4208
41
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Appendix F
111 � I97AUT1
Priority Habitats and Species Map
And Salmonscape
42
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
PHS Report
Hb„ Priority Habitats and Species on the Web
. IIILIILIFE
43
Land Services Northwest
December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
12/16/2020
PHS Report
Buffer radius: 300 Feet
Report Date: 12/16/2020, Parcel ID: 00594400008701
PHS Species/Habitats Overview:
�a•
Occurence Narne Federal Status State Status Generalized Location
Resident Coastal Cutthroat N/A N/A No
Biodiversity Areas And Corridor I N/A N/A No
PHS Species/Habitats Details:
2/4
44
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
12/162020
PHS Report
Resident Coastal Cutthroat
Scientific Name
Oncorhynchus c/arki
Priority Area
Occurrence/Migration
Accuracy
NA
Notes
LLID: 1223453478424, Fish Name: Cutthroat Trout, Run Time:
Unknown or not Applicable, Life History: Unknown
Source Record
41929
Source Dataset
SWIFD
Federal Status
N/A
State Status
N/A
PHS Listing Status
PHS Listed Occurrence
Sensitive
N
SGCN
N
Display Resolution
AS MAPPED
More Info
http://wdfw.wa.gov/wlm/diveMty/Soctsoc.htm
Geometry Type
Lines
45
Land Services Northwest
December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
12/162020
PHS Report
Biodiversity Areas And Corridor
Priority Area
Terrestrial Habitat
Site Name
SNOHOMISH COUNTY PARK LANDS
Accuracy
1/4 mile (Quarter Section)
Notes
VARIOUS PARKLAND PARCELS IN SNOHOMISH COUNTY.
Source Record
902541
Source Dataset
PHSREGION
Source Name
OPPERMANN, TONY
Source Entity
WA Dept. of Fish and Wildlife
Federal Status
N/A
State Status
N/A
PHS Listing Status
PHS Listed Occurrence
Sensitive
N
SGCN
N
Display Resolution
AS MAPPED
ManagementRecommendations
d=00023
Geometry Type
Polygons
DISCLAIMER. This report includes information that the Washington Department of Fish and Wildlife (WDFW) maintains in a central computer database. it is not an attempt to provide you
with an official agency response as to the impacts of your project on fish and wldlife. This infonnatlon only documents the location offish and wildlife resources to the best of our knowledge.
It is not a complete inventory and it is important to note that fish and wildlife resources may occur in areas not currently known to WDFW biologists, or in areas for which comprehensive
surveys have not been conducted. Site specific surveys are frequently necesssary to rule out the presence of priority resources. Locations offish and wildlife resources are subject to
variation caused by disturbance, changes in season and weather, and other factors. WDFW does not recommend using reports more than six months old.
46
Land Services Northwest
December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Salmvnscape
December 16, 2020
All 5almon5cape Species
1:9.02 S
0 0.05 0.1 0.2 mi
0 0.07 0.15 0.3 km
soarer: EM. HERE, Gamin, IhtCl ap. nu Mm P CAFF GEBCO, L'M:S.
FAIL, NPS. NRCNY. 6e08 W IGN. Kaa K NL. Ordnance Sur,ef.. EV1
Japan. MET, C Chlna ftlm9 Kq'191. Ici O�en5tree1hlap corcYlWNrs. and
Me Gl5 LJE Cml mky.IFSG&-"D.. Oafe GUmBer1PMX-.4J. 'A'.7f'4V
47
Land Services Northwest December 15, 2020
Pichner Deck and Wall Installation Critical Area and Habitat Management Plan
Appendix G
Geotechnical Study
48
Land Services Northwest December 15, 2020