HomeMy WebLinkAboutRS_Wetland_Report_0101232Critical Areas Report
Enclave Preliminary 5 – Lot Short Plat
City of Renton
May 26, 2022
Prepared for:
City of Renton
1055 South Grady Way
Renton, WA 98057
Prepared on behalf of (applicant’s agent):
Vijay Bhaskar Kakubal
Ramesh Vudathu
980 Hoquiam Ave NE
Renton, WA 98059
The Watershed Company Contact Person:
Sage Presster, Ecologist
Ryan Kahlo, PWS, Senior Ecologist
Title-page image: View of existing residence from northern property boundary (April 17, 2020).
Report Disclaimer: The information contained in this report is based on the application of
technical guidelines currently accepted as the best available science and in conjunction with the
manuals and criteria outlined in the methods section. All discussions, conclusions and
recommendations reflect the best professional judgment of the author(s) and are based upon
information available at the time the study was conducted. All work was completed within the
constraints of budget, scope, and timing. The findings of this report are subject to verification
and agreement by the appropriate local, state and federal regulatory authorities. No other
warranty, expressed or implied, is made.
The Watershed Company Reference Number: 200411
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Ta b l e o f C o n t e n t s
1. Introduction ......................................................................................... 1
1.1 Background and Purpose ...................................................................... 1
1.2 Methods ................................................................................................ 2
1.2.1 Existing Documentation Review ........................................................ 2
1.2.2 Fieldwork ............................................................................................ 2
1.3 Site Description ..................................................................................... 3
2. Critical Areas and Shorelines ................................................................ 5
2.1 Wetlands ............................................................................................... 5
2.1.1 Wetland A .......................................................................................... 5
3. Local Regulations .................................................................................. 6
3.1 Wetlands ............................................................................................... 6
3.2 Alterations to Critical Area Buffers ....................................................... 6
4. Project Description ............................................................................... 7
4.1 Overview ............................................................................................... 7
4.2 Mitigation Sequencing .......................................................................... 8
5. Impact Assessment / Lift Analysis ......................................................... 9
6. Mitigation Plan ................................................................................... 11
6.1 Goals ................................................................................................... 11
6.2 Performance Standards ...................................................................... 11
6.3 Monitoring Plan .................................................................................. 12
6.4 Construction Notes and Specifications .............................................. 13
6.5 General Work Sequence ..................................................................... 13
6.6 Material Specifications and Definitions ............................................. 13
6.7 Contingencies ..................................................................................... 14
6.8 Maintenance ....................................................................................... 14
7. Summary ............................................................................................ 16
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Appendix A
Mitigation Plan
Appendix B
Bond Quantity Worksheet
Appendix C
Wetland Rating Form and Data Sheets
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L i s t o f F i g u r e s
Figure 1. Vicinity and project area map (King County iMap, 2019). ................................. 4
Figure 2. View of Wetland A from delineated northern wetland boundary (04-
17-2020). ............................................................................................................ 5
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May 2022
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1. Introduction
1.1 Background and Purpose
The purpose of this report is to document existing site conditions, identify potential critical area
impacts, and propose mitigation associated with the proposed five lot short plat located at 980
Hoquiam Avenue NE (parcel #1023059060) in the City of Renton (Figure 1). The site contains
one Category III depressional wetland, Wetland A, located in the southwest quadrant of the
subject property extending off-site to the east along the southern property boundary. Wetland
A is prescribed a standard 75-foot buffer with a 15-foot building setback from the edge of the
wetland buffer per Renton Municipal Code (RMC) 4-3-050G.2. The majority of the wetland
buffer consist of maintained lawn, monocultures of reed canary grass (Phalaris arundinacea), and
Himalayan blackberry (Rubus bifrons), and a forested component densely vegetated with a
Himalayan blackberry understory. Ornamental and native shrubs and trees are located along
the western and northern property boundaries. A residential home is located in the northwest
quadrant of the subject property with an impervious walkway slightly protruding into the
building setback. One small shed is located along the northern property boundary outside of
the critical area buffer and building setback. The property gradually slopes south, toward
Wetland A.
The applicant proposes to demolish the existing residential home and shed and to subdivide the
property into five new lots off NE 10th Street. To increase buildable area to allow the five lots
onto the subject property, the applicant proposes a reduction of the Wetland A buffer with
enhancement, in accordance with RMC 4-3-050I.3.a. The proposed plan will develop the five
new lots outside of the reduced wetland buffer, and the structures outside of the associated
building setback line. The current wetland buffer dominated by reed canary grass, Himalayan
blackberry, maintained lawn, and ornamentals will be enhanced with native vegetation to
function at a higher level than the standard buffer.
This report and accompanying mitigation plan document how the proposed development of a
five lot short plat, with mitigation, will maintain or improve critical area and buffer functions
relative to existing conditions.
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1.2 Methods
1.2.1 Existing Documentation Review
Public-domain information on the subject site and surrounding area was reviewed for this
critical areas report and are summarized in Table 1.
Table 1. Summary of online mapping and inventory resources.
1.2.2 Fieldwork
Staff Ecologists, Sage Presster and Jamie Sloan, of The Watershed Company completed a
wetland delineation study on the subject property on April 17, 2020.
The study area was evaluated for wetlands using methodology from the Corps of Engineers
Wetland Delineation Manual (Environmental Laboratory 1987) and the Regional Supplement to the
Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region
Version 2.0 (U.S. Army Corps of Engineers 2010). Presence or absence of wetlands was
determined based on an examination of vegetation, soils and hydrology. These parameters were
sampled at several locations along the wetland boundary to determine the wetland edge.
Wetlands were classified using the Department of Ecology’s 2014 rating system (Hruby 2014).
Resource Summary
USDA NRCS: Web Soil
Survey
Alderwood gravelly sandy loam, 8 to 15 percent slopes throughout subject
parcel.
USFWS: NWI Wetland
Mapper
No wetlands mapped within subject parcel. Palustrine Shrub-Scrub (PSSF)
and Palustrine Forested (PFOC) wetlands mapped 900-feet east of subject
parcel. Intermittent stream (R4SBC) mapped 900-feet east of subject
parcel.
WDFW: PHS on the Web Freshwater Forested/Shrub Wetland priority area mapped 900-feet and
1000-feet southeast of subject parcel.
WDFW: SalmonScape No streams mapped on subject parcel. Intermittent stream (May Creek)
mapped 900 feet east of subject parcel.
DNR Mapping Tool Type-F stream mapped 900-feet east of subject parcel.
King County iMap No wetlands or streams mapped on subject parcel.
City of Renton: COR MAPS
Wetland mapped in the southern portion of the subject property, extending
off-site to the east. Regulated slope polygons mapped along western
property boundary off of Hoquiam Ave NE.
WETS Climatic Condition Normal.
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May 2022
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The study area was evaluated for the presence or absence of an ordinary high water mark as
defined by Section 404 of the Clean Water Act, the Washington Administrative Code (WAC)
220‐660‐030, and the Revised Code of Washington (RCW) 90.58.030 and guidance documents
including Determining the Ordinary High Water Mark for Shoreline Management Act
Compliance in Washington State (Anderson 2016) and A Guide to Ordinate High Water Mark
(OHWM) Delineation for Non-Perennial Streams in the Western Mountains, Valleys, and Coast
Region of the United States (Mersel 2016).
Characterization of climatic conditions for precipitation in the Wetland Determination Data
Forms were determined using the WETS table methodology (USDA, NRCS 2015). The “Seattle
Tacoma Intl AP” station from 1981‐2010 was used as a source for precipitation data
(http://agacis.rcc‐acis.org/). The WETS table methodology uses climate data from the three
months prior to the site visit month to determine if normal conditions are present in the study
area region.
1.3 Site Description
The subject property is located at 980 Hoquiam Avenue NE (parcel #1023059060) in the City of
Renton (Figure 1). The subject property is situated in the May Creek drainage basin of the
Cedar-Sammamish River watershed (WRIA 8); Section 10 of Township 23 North, Range 05 East
of the Public Land Survey System.
The subject property is approximately 2.05 acres in size per the King County Assessor. The
topography slopes gently downhill towards a ponded wetland in the southern portion of the
subject property. The property and surrounding land are zoned R-8 and are characterized by
single-family homes. The subject property is currently developed with a single-family
residence, concrete driveway and walkways, a shed, and maintained lawn and ornamental
vegetation. Areas south of the residential structure are significantly encumbered by critical
areas and buffers, including a depressional wetland, Wetland A, situated in the southern
portion of the subject property. The buffer is significantly degraded with a large monoculture of
reed canary grass and Himalayan blackberry.
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Enclave Preliminary 5 – Lot Short Plat
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Figure 1. Vicinity and project area map (King County iMap, 2019).
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2. Critical Areas and Shorelines
2.1 Wetlands
2.1.1 Wetland A
According to hydrogeomorphic classification, Wetland A is a depressional wetland containing
palustrine emergent, palustrine scrub-shrub, and palustrine forested Cowardin vegetation
classes. The tree stratum is dominated by red alder (Alnus rubra), black cottonwood (Populus
balsamifera), and Pacific willow (Salix lucida). The shrub stratum is dominated by Sitka willow
(Salix sitchensis), twinberry (Lonicera involucrata), red-osier dogwood (Cornus sericea),
salmonberry (Rubus spectabilis), hardhack (Spiraea douglasii), and Himalayan blackberry. The
herbaceous stratum is dominated by reed canary grass, common cattail (Typha latifolia), slough
sedge (Carex obnupta), soft-rush (Juncus effusus), lady fern (Athyrium filix-femina), horsetail
(Equisetum telmateia), and creeping butter cup (Ranunculus repens).
Figure 2. View of Wetland A from delineated northern wetland boundary (04-17-2020).
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3. Local Regulations
3.1 Wetlands
Wetlands in the City of Renton are regulated under Chapter 4-3-050 Critical Areas Regulations of
the RMC. Wetlands in the City of Renton are classified using the 2014 Update to the Western
Washington Wetland Rating System (Publication #14-06-029). According to the RMC, wetlands are
rated as one of four categories based on the Rating System, and wetland buffers are determined
based upon a combination of the wetland category and habitat score. Wetland A is a Category
III wetland with a low habitat score of four points and, therefore, requires a standard buffer of
75-feet per RMC 4-3-050G.2. Additionally, the City of Renton requires a 15-foot building setback
from the edges of all wetland buffers per RMC 4-3-050G.2.
3.2 Alterations to Critical Area Buffers
The City of Renton allows wetland buffer widths to be reduced with enhancement, as long as
the proposed enhancement meets all of the following criteria per RMC 4-3-050I.3.a.
i. The reduced buffer will function at a higher level than the standard buffer.
The wetland buffer consists of maintained lawn, ornamentals, and monocultures
of reed canary grass and Himalayan blackberry. The buffer will be enhanced
with planting of native trees, shrubs, and ground cover to increase native
vegetation density and diversity. The mitigation plan with monitoring and
maintenance will improve critical area and buffer functions relative to existing
conditions.
ii. The enhanced buffer shall never be less than seventy five percent (75%) of the standard width
at its narrowest point.
The proposed reduced wetland buffer is at 56.25 feet (75%) of the standard buffer
of 75 feet.
iii. The buffer has less than fifteen percent (15%) slopes and no direct or indirect, short-term or
long-term, adverse impacts to regulated wetlands, as determined by the City of Renton.
The survey of existing site conditions (L001 of the attached mitigation plan)
shows no areas within the standard wetland buffer exceeding fifteen percent
slopes. No direct or indirect, short-term or long-term adverse impacts to Wetland
A are to occur. The proposed development of the five lot short plat will be
located outside of the reduced wetland buffer and building setback.
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iv. The proposal shall rely upon a site-specific evaluation and documentation of buffer adequacy
based upon Wetlands in Washington State, Volume 1: A Synthesis of the Science (Ecology
Publication No. 05-06-006, March 2005) and Wetlands in Washington State, Volume 2:
Managing and Protecting Wetlands (Ecology Publication No. 04-06-008, April 2005), or
similar approaches.
The mitigation plan has been developed in consideration of the Ecology
guidance documents reference above, as well as the updated Ecology mitigation
guidance document: Wetland Mitigation in Washington State Part 1: Agency Policies
and Guidance Version 2 (Ecology Publication 21-06-003, April 2021). The proposal
addresses mitigation sequencing per the guidance documents and does not
require additional compensatory mitigation for direct or indirect wetland
impacts. The plan includes appropriate site-specific species compositions, goals
and performance standards, monitoring plan, and contingency plan.
v. The proposed buffer standard is based on consideration of the best available science as
described in WAC 365-195-905;
The buffer averaging plan has been prepared according to the best available
science as applied on numerous similar projects by The Watershed Company in
both design and review capacities.
Per RMC 4-3-050C.3.9 New surface water discharges in the form of dispersion trenches are allowed
within the outer 25% of the buffer a Category III or IV wetland only provided that: the discharge meets
requirements of the drainage (surface water) standards (RMC 4-6-030); no other location is feasible; and
will not degrade the functions or values of the wetland or stream.
The applicant also proposes to install basic stormwater dispersion trench within the building
setback. The basic dispersion trench is and allowed exemption as they will be located outside of
the wetland buffer and meet the requirements of the drainage standards per RMC 4-6-030.
4. Project Description
4.1 Overview
The site contains one Category III depressional wetland, Wetland A, located in the southwest
quadrant of the subject property extending off-site to the east along the southern property
boundary. Wetland A is prescribed a standard 75-foot buffer with a 15-foot building setback
from the edge of the wetland buffer. The majority of the wetland buffer consist of maintained
lawn, monocultures of reed canary grass and Himalayan blackberry, and a forested component
Critical Areas Report
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densely vegetated with a Himalayan blackberry understory. Ornamental and native shrubs and
trees are located along the western and northern property boundaries. A residential home is
located in the northwest quadrant of the subject property with an impervious walkway slightly
protruding into the building setback. One small shed is located along the northern property
boundary outside of the critical area buffer and building setback.
The applicant proposes to demolish the existing residential home and shed, to subdivide the
property into five new lots off of NE 10th Street. To increase buildable area to allow the five lots
onto the subject property, the applicant proposes a reduction of the Wetland A buffer with
enhancement, in accordance with RMC 4-3-050I.3.a. The proposed plan will develop the five
new lots outside of the reduced wetland buffer, and the structures outside of the associated
building setback line. The current wetland buffer dominated by reed canary grass, Himalayan
blackberry, maintained lawn, and ornamentals will be enhanced with. The buffer will be
enhanced with planting of native trees, shrubs, and groundcover to increase native vegetation
density and diversity.
The applicant will be installing basic dispersion trenches within the building setback of each
proposed lot. Basic dispersion trenches are allowed in the outer twenty-five percent (25%) of the
buffer of a Category III wetland per RMC 4-3-050C.3.9. The applicant’s proposal is well outside
of the wetland buffer entirely.
Following mitigation sequencing per RMC 4-3-050L.1.b. to minimize impacts and following
mitigation and monitoring guidance per RMC 4-3-050L.3., the proposed redevelopment of the
subject property into a five lot short plat, will maintain or improve the critical area and buffer
functions relative to existing conditions.
4.2 M itigation Sequencing
Pursuant to RMC 4-3-050L.1.b. The site design avoids and minimizes impacts to the on-site
critical areas and associated buffers as feasible.
Avoid. The proposed short plat will be constructed outside of the reduced wetland buffer and
associated building setback line. The project will place the entire reduced buffer into a separate
critical areas tract so that the buffer will be protected in perpetuity.
Minimiz e . Minimization techniques were utilized during the design process in order to limit
impacts to on-site critical areas. The buffer reduction with enhancement will allow the proposed
development of five lots to be located outside of the reduced buffer and building setback, while
maintaining and improving wetland buffer functions. A split rail fence will be located along the
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May 2022
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reduced 56.25 foot buffer of Wetland A to detour human or pet disturbance within the
enhanced buffer area.
M itigation . The standard 75-foot buffer of Wetland A will be reduced to the maximum
extent of 56.25 feet (75%) with the enhancement of 24,460 SF of Wetland A buffer. The wetland
buffer consists of maintained lawn, ornamentals, and monocultures of reed canary grass and
Himalayan blackberry. The buffer will be enhanced with planting of native trees and shrubs to
increase native vegetation density and diversity. Vegetated flow paths located in the buffer will
be enhanced with planting of native trees, shrubs, and groundcover. The mitigation plan with
monitoring and maintenance will improve critical area and buffer functions relative to existing
conditions. Temporary impacts in the building setback totaling 5,470 SF will be restored in place
per owner selected landscaping that is compliant with critical area criteria and stormwater best
management practices.
M onitor . A five-year maintenance and monitoring program is proposed in accordance with
RMC 4-3-050L. Performance standards will be used to assess the project success over time and
ensure successful establishment of the mitigation area.
5. Impact Assessment / Lift Analysis
The proposed development of the five-lot short plot will be located outside of the reduced
wetland buffer and building setback line. The standard wetland buffer consists of maintained
lawn, ornamentals, and monocultures of reed canary grass and Himalayan blackberry.
Temporary impacts within the building setback will be restored in place by reseeding affected
areas resulting in no net loss to water quality, hydrology, and wildlife habitat functions. The
reduced wetland buffer will be enhanced with planting of native trees, shrubs, and ground
cover to increase native vegetation density and diversity. The buffer enhancement per the
proposed mitigation plan will result in improved water quality, hydrology, and wildlife habitat
function. An assessment of pre- and post- project buffer functions is summarized below in Table
2.
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Table 2. Functional Lift Analysis
Existing Condition Proposed Condition Net Result Water Quality The current water quality functions
of the buffer and building setback
line in the project area are limited.
The project area buffer consists of
maintained lawn, ornamentals, and
monocultures or dense understories
of invasive species. A concrete
walkway extends into the building
setback. The lack of dense woody
vegetation that can trap and store
sediment and pollutants limit the
area’s capacity to provide water
quality functions.
Increase native woody vegetation
throughout enhanced wetland
buffer that can trap and store
sediment and pollutants. Install
basic stormwater dispersion trench
outside of the wetland buffer in the
building setback and vegetate with
lawn and native woody vegetation.
The proposed five-lot short plat
will be located outside of the
critical area buffer, stormwater
management meets current
regulations, and new plantings
wetland buffer will improve
filtration of site run off.
Hydrology The current hydrology functions of
the buffer in the project area are
limited. The project area buffer
majorly consists of maintained lawn,
ornamentals, and monocultures of
invasive species. The lack of dense
woody vegetation and vertical
structure that could slow runoff
velocities limits the capacity to
provide hydrology functions.
Increased persistent and woody
native species as a result of
mitigation, coupled with improved
surface water runoff management
as a result of current civil
plans/permit approvals.
New native plantings will
provide increased roughness
and transpiration. And the
stormwater dispersion
trenches will also slow surface
water flows to wetland. Habitat The current habitat functions of the
wetland buffer are limited by the
lack of vegetative diversity. The
project area buffer majorly consists
of maintained lawn, ornamentals,
and monocultures of invasive
species. A small, forested area is
noted in the southeastern portion of
the subject property but consist of a
dense understory of Himalayan
blackberry.
The buffer enhancement will
increase native tree, shrub and
groundcover plant density and
diversity. Native plants will increase
forage, nesting, and cover
opportunities for wildlife.
Enhancement planting will
improve microclimate, increase
vegetative structure and
diversity, and provide suitable
habitat for foraging, nesting,
and/or resting.
Net Condition The existing buffer area is composed
of maintained lawn, ornamentals,
and monocultures of invasive
species Overall, the area provides
very low levels of water quality,
hydrology, and wildlife habitat
functions.
The proposed five-lot short plat will
be located outside of the wetland
buffer; improved surface water
management will be installed,
including dispersion trenches; the
degraded wetland buffer composed
of maintained lawn, ornamentals,
and monocultures of invasive
species will be restored with native
trees, shrubs, and groundcover
plants.
Wetland buffer habitat will be
improved with an increase in
native vegetation; increased
roughness; improved surface
runoff management; increased
habitat structural and
compositional complexity, and
an increase in organic material
to the food chain.
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6. Mitigation Plan
A 5-year maintenance and monitoring plan is proposed to ensure and document the plan meets
performance standards.
6.1 Goals
1. Enhance 24,460 SF of Wetland A buffer.
a. Establish a diverse and native vegetation community.
b. Reduce the presence of invasive species in the degraded buffer.
2. Restore 5,470 SF of temporary building setback impacts in place to an equivalent or
greater condition. Reduce the presence of invasive species in the degraded building
setback.
6.2 Performance Standards
The following performance standards will be used to gauge the success of the project over time.
If all performance standards have been satisfied by the end of year three, the project shall be
considered complete and City of Renton shall release the performance bond.
1. Survival:
a. Achieve 100% survival of installed mitigation plants by the end of Year 1. This
standard can be met through plant establishment or through replanting as
necessary to achieve the required numbers.
b. Achieve 80% survival of installed mitigation plants by the end of Year 2. This
standard can be met through replanting as necessary to achieve he required
numbers.
2. Native vegetation cover standards:
a. Achieve 60% aerial cover of native woody vegetation in all areas by the end of
Year 3. Native volunteers may count towards this standard.
b. Achieve 80% aerial cover of native woody vegetation in all areas by the end of
Year 3. Native volunteers may count towards this standard.
3. Species Diversity:
a. Establishment of at least 4 native tree species, 9 native shrub species, and 3 native
groundcover species in wetland buffer enhancement areas.
4. Invasive species cover standard:
a. No more than 10% aerial cover of non-native, invasive species in any planting
areas in any monitoring year. Reed canary grass is exempt from this standard.
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However, monocultures shall not persist. A monoculture is defined as an area
larger than 100 square feet devoid of native vegetation.
6.3 Monitoring Plan
This monitoring program is designed to track the success of the mitigation site over time and to
measure the degree to which it is meeting the performance standards outlined elsewhere in this
document.
An as-built plan will be prepared by the restoration specialist prior to the beginning of the
monitoring period. The as-built plan will be a mark-up of the planting plans included in this
plan set. The as-built plan will document any departures in plant placement or other
components from the accepted mitigation plan. During the as-built inspection, the restoration
specialist shall install baseline monitoring transects. A minimum of three 100-foot transects shall
be located in the wetland buffer enhancement area. During each monitoring event, percent
cover values will be measured along the transects using the line-intercept methods. Belt
transects along the monitoring transects may be used to capture a representative sample for
determining future survival. Areas within the belt transects will be extrapolated site-wide to
determine an approximate percent survival.
Monitoring will take place quarterly for the first year (Year 1) and thereafter annually for the
next four years (Years 2, 3, 4, and 5) following construction for a total of five years minimum.
First-year monitoring will begin in the first quarter (January-March) subsequent to installation.
In Year 1, a plant census will be conducted using the belt transects described above. In Years 2
through 5, representative samples of the mitigation area will be assessed and progress toward
the performance standards measured. Native cover will be measured along transects using line-
intercept methods. Invasive species cover will be visually estimated in each year.
In Year 1, the quarterly monitoring visits will record maintenance issues such as the need for
plant replacement and invasive species removal. Following each visit, the restoration specialist
will notify the owner and/or maintenance crews of necessary maintenance needs. The fourth
quarter of Year 1, the early fall monitoring visit, will include performance standard
measurements and a subsequent annual report submitted to City of Renton. The report will
contain:
1. General summary of the spring visit.
2. First-year and second-year counts of plants by species in the planted area using belt
transects established during the as-built.
3. Counts of dead plants where mortality is significant in any monitoring year.
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4. Estimate of native sapling tree and shrub cover using the line-intercept method.
5. Estimate of invasive weedy cover using the line-intercept method.
6. Photographic documentation from fixed reference points.
7. Intrusions into the planting areas, vandalism or other actions that impair the intended
functions of the planted areas.
8. Recommendations for maintenance or repair of any portion of the mitigation area.
6.4 Construction Notes and Specifications
Note: specifications for items in bold can be found below under “Material Specifications and
Definitions.”
Note: Recommend having The Watershed Company [(425) 822-5242] personnel, or other
persons qualified to evaluate environmental restoration projects, shall monitor mitigation plan
installation. Generally, those inspections cover the following:
1. All site preparation
a. Invasive plant removal.
b. Soil preparation.
2. Plant material inspection
a. Plant material delivery inspection.
b. Plant installation inspection.
3. Final installation inspection
a. Temporary irrigation in-place.
6.5 General Work Sequence
1. All plant installation is to take place during a frost-free period in the dormant season
(October 15th – March 30th), for best survival.
2. Prepare a planting areas and prepare planting pits per the details in this plan set (L003).
3. Apply wood chip mulch rings to installed plants per detail 1 on sheet L004.
4. Install a temporary or permanent irrigation system to provide full coverage to all plants
within restoring area during the monitoring period.
6.6 Material Specifications and Definitions
1. Restoration professional: Watershed Company [(425) 822-5242] personnel, or other
persons qualified to evaluate environmental restoration projects.
2. Fertilizer: Slow release, granular PHOSPHOROUS-FREE fertilizer. Follow
manufacturer’s instructions for application. Keep fertilizer in a weather-tight container
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while on site. Note that fertilizer is to be applied only in Years 2, 3, 4 and 5 and not in the
first year. Do not apply fertilizer to inundated or ponded areas or areas that may become
inundated.
3. Irrigation system: Automated system capable of delivering at least two inches of water
per week from June 1 through September 30 for the first two years following installation.
4. Wood chip mulch: 9-14.4(3) bark or wood chips- WSDOT Standard Spec. bark or wood
chip mulch shall be derived from Douglas-fir, pine, or hemlock species. It shall not
contain resin, tannin, or other compounds in quantities that would be detrimental to
plant life. Sawdust shall not be used as mulch.
Bark or wood chips when tested shall be according to WSDOT test method T 123 prior to
placement and shall meet the following loose volume generation:
Sieve Size
Percent Passing
Minimum Maximum
2” 95 100
No. 4 0 30
6.7 Contingencies
If there is a significant problem with the restoration areas meeting performance standards, a
contingency plan will be developed and implemented. Contingency plans can include but are
not limited to: soil amendment; additional plant installation; and plant substitutions of type,
size, quantity, and location.
6.8 Maintenance
The site will be maintained for five years following completion of the construction. Note:
specifications for items in bold can be found above under “Material Specifications and
Definitions.”
1. Replace each plant found dead in the summer monitoring visits during frost-free
periods only in the upcoming fall dormant season (October 15 to March 30) for the first
monitoring year. Replace plants as directed in monitoring reports from Years 2 through
5.
2. Follow the recommendations noted in the spring monitoring site visit.
3. General weeding for all planted areas:
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a. At least twice yearly, remove all competing grass and weeds, including roots,
from beneath each installed plant and any desirable volunteer vegetation to a
distance of 18 inches from the main plant stem. Weeding should occur at least
twice during the spring and summer. Frequent weeding will result in lower
mortality and lower plant replacement costs.
b. More frequent weeding may be necessary depending on weed conditions that
develop after plan installation.
c. Do not weed the area near the plant bases with string trimmer (weed
whacker/weed eater). Native plants are easily damaged or killed, and weeds
easily recover after trimming.
d. To keep weed coverage throughout the planting area below the 10% threshold,
problem weeds such as Himalayan blackberry should be removed from the
mitigation area during spring and summer maintenance checks.
4. Apply slow-release, phosphorous-free granular fertilizer to each installed plant
annually in the spring (by June 1) of Years 2 through 5. Do not apply fertilizer to
inundated or ponded areas or areas that may become inundated.
5. Re-apply mulch wood chips as necessary to maintain a 4-inch-thick, 18-inch diameter
mulch rings and keep down weeds.
6. The property owner shall ensure that water is provided for the entire planted area with
a minimum of 2 inches of water provided per week from June 1 through September 30
for the first two years following installation through the operation of a temporary
irrigation system.
Critical Areas Report
Enclave Preliminary 5 – Lot Short Plat
16
7. Summary
The owner of parcel 1023059060 located at 980 Hoquiam Avenue NE in the City of Renton,
plans to demolish the existing residential home and shed, to sub divide the property into five
new lots off of NE 10th Street. To increase buildable area to allow the five lots onto the subject
property, the applicant proposes a reduction of the Wetland A buffer with enhancement, in
accordance with RMC 4-3-050I.3.a. The standard 75-foot buffer of the Category III Wetland will
be reduced to the maximum extent of 56.25 feet (75%) with the enhancement of 24,460 SF of
Wetland A buffer. The proposed plan will develop the five new lots outside of the reduced
wetland buffer, and the structures outside of the associated building setback line. An allowed
critical area exemption of a basic dispersal trench will be located within the building setback
line. The buffer will be enhanced with planting of native trees and shrubs to increase native
vegetation density and diversity. Vegetated flow paths located in the buffer will be enhanced
with planting of native trees, shrubs, and groundcover. The mitigation plan with monitoring
and maintenance will improve critical area and buffer functions relative to existing conditions.
Temporary impacts in the building setback totaling 5,470 SF will be restored in place per owner
selected landscaping that is compliant with critical area criteria and stormwater best
management practices.
This report was prepared by:
Sage Presster Ryan Kahlo, PWS
Ecologist Senior Ecologist
The Watershed Company
May 2022
17
R eferenc es
King County iMap. Accessed January 2022. Website:
http://www.kingcounty.gov/services/gis/Maps/imap.aspx
United States Department of Agriculture (USDA). Accessed January 2022. Natural Resources
Conservation Service: Web Soil Survey. Website:
http://websoilsurvey.sc.egov.usda.gov/App/HomePage.htm.
United States Fish and Wildlife Service (USFWS). National Wetland Inventory Maps. Accessed
January 2022. Website: https://www.fws.gov/wetlands/
Washington Department of Fish and Wildlife. Priority Habitats and Species (PHS): PHS on the
Web. Accessed January 2022. Website: http://wdfw.wa.gov/mapping/phs/.
Washington Department of Fish and Wildlife. SalmonScape. Accessed January 2022. Website:
http://apps.wdfw.wa.gov/salmonscape/map.html
Washington State Department of Natural Resources: Forest Practices Application Review
System (FPARS). Accessed January 2022. Website: http://www.dnr.wa.gov/programs-
and-services/forest-practices/forest-practices-application-review-system-fpars
Appendix A
Mitigation Plan
R = 35'VICINITY MAPLEGENDPARCEL BOUNDARYDELINEATED WETLAND BOUNDARYAPPROXIMATE WETLAND BOUNDARYSTANDARD WETLAND BUFFER (75')BUILDING SETBACK LINE (BSBL, 15')SHEET INDEXL001EXISTING CONDITIONSL002IMPACTS ASSESSMENTL003MITIGATION AND PLANTING PLANL004PLANT INSTALLATION AND MITIGATION DETAILSL005PLANT INSTALLATION SPECIFICATIONS AND MITIGATION NOTESNOTES1CRITICAL AREAS DELINEATED BY THE WATERSHED COMPANY ON APRIL17, 2020 AND MAY 20, 2020 (750 6TH STREET; KIRKLAND, WA 98033;425-822-5242.)2SURVEY, INCLUDING CRITICAL AREAS AND ASSOCIATED BUFFER ANDBUILDING SETBACKS PROVIDED APRIL 4, 2022 BY PACIFIC LANDENGINEERING (BELLEVUE, WA 98005; 425-615 -6160).3THE WATERSHED COMPANY MAKES NO WARRANTIES, INCLUDINGACCURACY, CURRENCY, OR COMPLETENESS, ABOUT THIS PRODUCT ORCONCERNING THE RESULTS OBTAINED FROM QUERIES OR USE OF THEBASE PLANS PROVIDED. THIS PLAN IS INTENDED FOR PLANNINGPURPOSES ONLY AND PROVIDED AS-IS, WITH ALL FAULTS.PROJECT:PRINCIPAL:PROJECT MANAGER:DRAWN BY:CHECKED BY:JOB NO.:DATE:DESCRIPTIONREVISIONS:NO.750 6TH STREET SOUTH
KIRKLAND WA 98033
425.822.5242
WWW.WATERSHEDCO.COM
S C I E N C E & D E S I G N
ENCLAVE PRELIMINARY 5 - LOT SHORT PLAT
980 HOQUIAM AVENUE NE RENTON, WA05/26/2022RKRH21073405/26/2022NOT FOR CONSTRUCTIONSCHEMATIC DESIGNMSF, RKOF 5DATEHMWETLAND BUFFER REDUCTION WITH ENHANCEMENT MITIGATION PLANSCALE 1" = 20'0020'40'10'20'1EXISTING CONDITIONSL001EXISTING HOUSEWETLAND A (CATEGORY III,75-FOOT STANDARD BUFFER)PARCEL #1023059060PROJECTLOCATIONNE 10TH STREETHOQUIAM AVENUE NE 75'15'
R = 35'R = 35'LEGENDEXISTINGPARCEL BOUNDARYDELINEATED WETLAND BOUNDARYAPPROXIMATE WETLAND BOUNDARYSTANDARD WETLAND BUFFER (75')BUILDING SETBACK LINE (BSBL, 15')PROPOSEDRECONFIGURED PARCEL BOUNDARYREDUCED WETLAND BUFFER / PROPOSED PROPERTY LINEREDUCED BSBL (15')REDUCED BSBL PERMANENT IMPACT (445 SF)REDUCED BSBL TEMPORARY IMPACT (5,510 SF)NOTES1SITE PLAN, INCLUDING PROPOSED REDUCED WETLAND BUFFER /PROPOSED PROPERTY LINE AND REDUCED BUILDING SETBACKPROVIDED APRIL 4, 2022 BY PACIFIC LAND ENGINEERING (BELLEVUE,WA 98005; 425-615 -6160).2POTENTIAL IMPACTS TO TREES ARE NOT INCLUDED AS PART OFCRITICAL AREA OR BUFFER IMPACTS ASSESSMENT.PROJECT:PRINCIPAL:PROJECT MANAGER:DRAWN BY:CHECKED BY:JOB NO.:DATE:DESCRIPTIONREVISIONS:NO.750 6TH STREET SOUTH
KIRKLAND WA 98033
425.822.5242
WWW.WATERSHEDCO.COM
S C I E N C E & D E S I G N
ENCLAVE PRELIMINARY 5 - LOT SHORT PLAT
980 HOQUIAM AVENUE NE RENTON, WA05/26/2022RKRH21073405/26/2022NOT FOR CONSTRUCTIONSCHEMATIC DESIGNMSF, RKOF 5DATEHMWETLAND BUFFER REDUCTION WITH ENHANCEMENT MITIGATION PLANSCALE 1" = 20'0020'40'10'20'L002PROPOSED CONDITIONSWETLAND A (CATEGORY III,56.25-FOOT REDUCED BUFFER)PROPOSED TRACT ABUILDABLEAREA, TYP.NE 10TH STREETHOQUIAM AVENUE NE PROPOSEDLOT 1PROPOSEDLOT 2PROPOSEDLOT 3PROPOSEDLOT 4PROPOSEDLOT 5PROPOSEDDRIVEWAY, TYP.75'15'15'PROPOSED BASICSTORMWATER DISPERSIONTRENCH, TYP. (SEE CIVILFOR DETAILS)PROPOSED VEGETATEDFLOW PATH, TYP. (SEECIVIL FOR DETAILS)2REDUCED WETLANDBUFFER / PROPOSEDPROPERTY LINE (SEESITE PLAN FOR DETAILS)
R = 35'R = 35'TREES - 10' O.C. TRIANGULAR SPACINGQTY.SIZEACER MACROPHYLLUM / BIG LEAF MAPLE301 GAL.FRANGULA PURSHIANA / CASCARA 301 GAL.PICEA SITCHENSIS / SITKA SPRUCE601 GAL.PSEUDOTSUGA MENZIESII / DOUGLAS FIR601 GAL.THUJA PLICATA / WESTERN RED CEDAR601 GAL.TREE QUANTITY:240SHRUBS - 5' O.C. TRIANGULAR SPACINGQTY.SIZEACER CIRCINATUM / VINE MAPLE501 GAL.CORNUS SERICEA / RED TWIG DOGWOOD601 GAL.CORYLUS CORNUTA / WESTERN HAZELNUT501 GAL.LONICERA INVOLUCRATA / TWINBERRY601 GAL.OEMLERIA CERASIFORMIS / OSOBERRY651 GAL.PHYSOCARPUS CAPITATUS / PACIFIC NINEBARK651 GAL.ROSA NUTKANA / NOOTKA ROSE651 GAL.RUBUS PARVIFLORUS / THIMBLEBERRY651 GAL.RUBUS SPECTABILIS / SALMONBERRY651 GAL.SALIX SCOULERIANA / SCOULER'S WILLOW501 GAL.SALIX SITCHENSIS / SITKA WILLOW501 GAL.SYMPHORICARPOS ALBUS / COMMON SNOWBERRY651 GAL.SHRUB QUANTITY:710TREES - 10' O.C. TRIANGULAR SPACINGQTY.SIZESPACINGTHUJA PLICATA / WESTERN RED CEDAR221 GAL.PSEUDOTSUGA MENZIESII / DOUGLAS FIR221 GAL.TREE QUANTITY:44SHRUBS - 5' O.C. TRIANGULAR SPACINGACER CIRCINATUM / VINE MAPLE101 GAL.CORYLUS CORNUTA / WESTERN HAZELNUT101 GAL.OEMLERIA CERASIFORMIS / OSOBERRY151 GAL.PHYSOCARPUS CAPITATUS / PACIFIC NINEBARK151 GAL.ROSA NUTKANA / NOOTKA ROSE151 GAL.RUBUS PARVIFLORUS / THIMBLEBERRY301 GAL.RUBUS SPECTABILIS / SALMONBERRY301 GAL.SYMPHORICARPOS ALBUS / COMMON SNOWBERRY201 GAL.SHRUB QUANTITY:130GROUNDCOVERS - TRIANGULAR SPACING AS NOTEDARCTOSTAPHYLOS UVA-URSI / KINNIKINNICK3001 GAL.2' O.C.FRAGARIA CHILOENSIS / BEACH STRAWBERRY3001 GAL.2' O.C.GAULTHERIA SHALLON / SALAL1001 GAL.3' O.C.MAHONIA NERVOSA / OREGON GRAPE1001 GAL.3' O.C.POLYSTICHUM MUNITUM / WESTERN SWORD FERN1001 GAL.3' O.C.GROUNDCOVER QUANTITY: 900PROJECT:PRINCIPAL:PROJECT MANAGER:DRAWN BY:CHECKED BY:JOB NO.:DATE:DESCRIPTIONREVISIONS:NO.750 6TH STREET SOUTH
KIRKLAND WA 98033
425.822.5242
WWW.WATERSHEDCO.COM
S C I E N C E & D E S I G N
ENCLAVE PRELIMINARY 5 - LOT SHORT PLAT
980 HOQUIAM AVENUE NE RENTON, WA05/26/2022RKRH21073405/26/2022NOT FOR CONSTRUCTIONSCHEMATIC DESIGNMSF, RKOF 5DATEHMWETLAND BUFFER REDUCTION WITH ENHANCEMENT MITIGATION PLANSCALE 1" = 20'0020'40'10'20'L003MITIGATIONPLANTING PLANWETLAND A (CATEGORY III,56.25-FOOT REDUCED BUFFER)PROPOSED TRACT ANE 10TH STREETHOQUIAM AVENUE NE PROPOSEDLOT 1PROPOSEDLOT 2PROPOSEDLOT 3PROPOSEDLOT 4PROPOSEDLOT 556.25'15'PROPOSED VEGETATEDFLOW PATH, TYP. (SEECIVIL FOR DETAILS)PLANTING SCHEDULE - TYPE A (20,610 SF)LEGENDEXISTINGPARCEL BOUNDARYDELINEATED WETLAND BOUNDARYAPPROXIMATE WETLAND BOUNDARYSTANDARD WETLAND BUFFER (75')BUILDING SETBACK LINE (15')PROPOSEDRECONFIGURED PARCEL BOUNDARYREDUCED WETLAND BUFFER / PROPOSED PROPERTY LINEREDUCED BSBL (15')TEMPORARY BSBL IMPACT TO BE RESTORED IN PLACE (3,080 SF)REDUCED BUFFER ENHANCEMENT AREA - TYPE A PLANTING (20,610 SF)VEGETATED FLOWPATH BUFFER ENHANCEMENT AREA - TYPE BPLANTING (3,850 SF)VEGETATED FLOWPATH BSBL PLANTING AREA (2,390 SF)SPLIT RAIL FENCENOTES1SEE SHEET L004 FOR PLANT INSTALLATION SPECIFICATIONS ANDMITIGATION NOTES.2TEMPORARY BSBL IMPACTS TO BE RESTORED IN PLACE WITH OWNERSELECTED LANDSCAPE.3VEGETATED FLOWPATH PLANTING AREA TO COMPLY WITH CITY OFRENTON SURFACE WATER DESIGN MANUAL SECTION C.2.4, BASICDISPERSION CRITERIA.4TEMPORARY IMPACTS WITHIN REDUCED BUFFER AREA TO BEENHANCED WITH TYPE A AND TYPE B PLANTINGS.5SPLIT RAIL FENCE IS SHOWN OFFSET FROM REDUCED WETLANDBUFFER / PROPOSED PROPERTY LINE FOR VISUAL CLARITY.PLANTING SCHEDULE - TYPE B (3,850 SF)3EXISTING FENCE TO BEREMOVEDREDUCED WETLANDBUFFER / PROPOSEDPROPERTY LINE (SEESITE PLAN FOR DETAILS)
PROJECT:PRINCIPAL:PROJECT MANAGER:DRAWN BY:CHECKED BY:JOB NO.:DATE:DESCRIPTIONREVISIONS:NO.750 6TH STREET SOUTH
KIRKLAND WA 98033
425.822.5242
WWW.WATERSHEDCO.COM
S C I E N C E & D E S I G N
ENCLAVE PRELIMINARY 5 - LOT SHORT PLAT
980 HOQUIAM AVENUE NE RENTON, WA05/26/2022RKRH21073405/26/2022NOT FOR CONSTRUCTIONSCHEMATIC DESIGNMSF, RKOF 5DATEHMWETLAND BUFFER REDUCTION WITH ENHANCEMENT MITIGATION PLANL004PLANT INSTALLATIONAND MITIGATION DETAILSScale: NTSCONTAINER PLANTING DETAIL12X MIN DIA. ROOTBALLNOTES:1.PLANTING PIT SHALL NOT BE LESS THAN (2) TIMESTHE WIDTH OF THE ROOT BALL DIA.2.LOOSEN SIDES AND BOTTOM OF PLANT PIT3.REMOVE FROM POT & ROUGH-UP ROOT BALLBEFORE INSTALLING. IF PLANT IS EXCEPTIONALLYROOT-BOUND OR CONTAINS CIRCLING ROOTS, DONOT PLANT AND RETURN TO NURSERY FOR ANACCEPTABLE ALTERNATIVE. IF B&B STOCK,REMOVE ALL TWINE/WIRE, & REMOVE BURLAP FROMTOP 1/3RD OF ROOTBALL PRIOR TO PLANTING(NOTE: CONTAINER STOCK PREFERRED)4.SOAK PLANTING PIT AFTER PLANTING4" WOOD CHIP MULCH IN ALLPLANTING BEDS. HOLD BACK MULCHFROM TRUNK/STEMSFINISH GRADEREMOVE DEBRIS AND LARGEROCKS AND BACKFILL WITHNATIVE SOIL. FIRM UP SOILAROUND PLANT4Scale: NTSSPLIT RAIL FENCE118"
MIN.
4"12"3'-0"
6"8'-0" MAX.6"FINISHED GRADECOMPACTEDGRAVEL BASE. NOCONCRETE IS TOBE PLACED INSENSITIVE AREAS.COMPACTEDSUBGRADE6" x 6" CEDAR POST NOTCHED TOCONTAIN AND CONCEAL RAILCONNECTION2" X 6" CEDAR RAILS
PROJECT:PRINCIPAL:PROJECT MANAGER:DRAWN BY:CHECKED BY:JOB NO.:DATE:DESCRIPTIONREVISIONS:NO.750 6TH STREET SOUTH
KIRKLAND WA 98033
425.822.5242
WWW.WATERSHEDCO.COM
S C I E N C E & D E S I G N
ENCLAVE PRELIMINARY 5 - LOT SHORT PLAT
980 HOQUIAM AVENUE NE RENTON, WA05/26/2022RKRH21073405/26/2022NOT FOR CONSTRUCTIONSCHEMATIC DESIGNMSF, RKOF 5DATEHMWETLAND BUFFER REDUCTION WITH ENHANCEMENT MITIGATION PLANL005PLANT INSTALLATIONSPECIFICATIONS ANDMITIGATION NOTESMITIGATION PLAN NOTESTHE STANDARD 75-FOOT BUFFER OF WETLAND WILL BE REDUCED TO THE MAXIMUM EXTENT OF 56.25 FEET (75%) WITH THE ENHANCEMENTOF 24,460 SF OF WETLAND A BUFFER. THE WETLAND BUFFER CONSISTS OF MAINTAINED LAWN, ORNAMENTALS, AND MONOCULTURES OFREED CANARY GRASS AND HIMALAYAN BLACKBERRY. THE BUFFER WILL BE ENHANCED WITH PLANTING OF NATIVE TREES AND SHRUBS TOINCREASE NATIVE VEGETATION DENSITY AND DIVERSITY. VEGETATED FLOWPATHS LOCATED IN THE BUFFER WILL BE ENHANCED WITHPLANTING OF NATIVE TREES, SHRUBS, AND GROUNDCOVER. THE MITIGATION PLAN WITH MONITORING AND MAINTENANCE WILL IMPROVECRITICAL AREA AND BUFFER FUNCTIONS RELATIVE TO EXISTING CONDITIONS. TEMPORARY IMPACTS IN THE BUILDING SETBACK TOTALING5,470 SF WILL BE RESTORED IN PLACE PER OWNER SELECTED LANDSCAPING THAT IS COMPLIANT WITH CRITICAL AREA CRITERIA ANDSTORMWATER BEST MANAGEMENT PRACTICES.MAINTENANCE AND MONITORING PLANA 5-YEAR MAINTENANCE AND MONITORING PLAN IS PROPOSED TO ENSURE THE PLAN MEETS PERFORMANCE STANDARDS.GOALS1.ENHANCE 24,460 SF OF WETLAND A BUFFER.a.ESTABLISH A DIVERSE AND NATIVE VEGETATION COMMUNITY.b.REDUCE THE PRESENCE OF INVASIVE SPECIES IN THE DEGRADED BUFFER.2.RESTORE 5,470 SF OF TEMPORARY BUILDING SETBACK IMPACTS IN PLACE TO AN EQUIVALENT OR GREATER CONDITION.a.REDUCE THE PRESENCE OF INVASIVE SPECIES IN THE DEGRADED BUILDING SETBACK.PERFORMANCE STANDARDSTHE FOLLOWING PERFORMANCE STANDARDS WILL BE USED TO GAUGE THE SUCCESS OF THE PROJECT OVER TIME. IF ALL PERFORMANCESTANDARDS HAVE BEEN SATISFIED BY THE END OF YEAR FIVE, THE PROJECT SHALL BE CONSIDERED COMPLETE AND THE CITY OF RENTONSHALL RELEASE THE PERFORMANCE BOND.1.SURVIVAL:a.ACHIEVE 100% SURVIVAL OF INSTALLED MITIGATION PLANTS BY THE END OF YEAR 1. THIS STANDARD CAN BE MET THROUGHPLANT ESTABLISHMENT OR THROUGH REPLANTING AS NECESSARY TO ACHIEVE THE REQUIRED NUMBERS.b.ACHIEVE 80% SURVIVAL OF INSTALLED MITIGATION PLANTS BY THE END OF YEAR 2. THIS STANDARD CAN BE MET THROUGHREPLANTING AS NECESSARY TO ACHIEVE HE REQUIRED NUMBERS.2.NATIVE VEGETATION COVER STANDARDS:a.ACHIEVE 60% AERIAL COVER OF NATIVE WOODY VEGETATION IN ALL AREAS BY THE END OF YEAR 3. NATIVE VOLUNTEERS MAYCOUNT TOWARDS THIS STANDARD.b.ACHIEVE 80% AERIAL COVER OF NATIVE WOODY VEGETATION IN ALL AREAS BY THE END OF YEAR 3. NATIVE VOLUNTEERS MAYCOUNT TOWARDS THIS STANDARD.3.SPECIES DIVERSITY:a.ESTABLISHMENT OF AT LEAST 4 NATIVE TREE SPECIES, 9 NATIVE SHRUB SPECIES, AND 3 NATIVE GROUNDCOVER SPECIES INWETLAND BUFFER ENHANCEMENT AREAS.4.INVASIVE SPECIES COVER STANDARD:a.NO MORE THAN 10% AERIAL COVER OF NON-NATIVE, INVASIVE SPECIES IN ANY PLANTING AREAS IN ANY MONITORING YEAR.REED CANARY GRASS IS EXEMPT FROM THIS STANDARD HOWEVER MONOCULTURES (DEFINED AS AN AREA LARGER THAN 100SQUARE FEET DEVOID OF NATIVE VEGETATION) SHALL NOT PERSIST.MONITORING PLANTHIS MONITORING PROGRAM IS DESIGNED TO TRACK THE SUCCESS OF THE MITIGATION SITE OVER TIME AND TO MEASURE THE DEGREE TOWHICH IT IS MEETING THE PERFORMANCE STANDARDS OUTLINED ELSEWHERE IN THIS DOCUMENT.AN AS-BUILT PLAN WILL BE PREPARED BY THE RESTORATION SPECIALIST PRIOR TO THE BEGINNING OF THE MONITORING PERIOD. THEAS-BUILT PLAN WILL BE A MARK-UP OF THE PLANTING PLANS INCLUDED IN THIS PLAN SET. THE AS-BUILT PLAN WILL DOCUMENT ANYDEPARTURES IN PLANT PLACEMENT OR OTHER COMPONENTS FROM THE ACCEPTED MITIGATION PLAN. DURING THE AS-BUILT INSPECTION,THE RESTORATION SPECIALIST SHALL INSTALL BASELINE MONITORING TRANSECTS. A MINIMUM OF THREE 100-FOOT TRANSECTS SHALL BELOCATED IN THE WETLAND BUFFER ENHANCEMENT AREA. DURING EACH MONITORING EVENT, PERCENT COVER VALUES WILL BE MEASUREDALONG THE TRANSECTS USING THE LINE-INTERCEPT METHODS. BELT TRANSECTS ALONG THE MONITORING TRANSECTS MAY BE USED TOCAPTURE A REPRESENTATIVE SAMPLE FOR DETERMINING FUTURE SURVIVAL. AREAS WITHIN THE BELT TRANSECTS WILL BE EXTRAPOLATEDSITE-WIDE TO DETERMINE AN APPROXIMATE PERCENT SURVIVAL.MONITORING WILL TAKE PLACE QUARTERLY FOR THE FIRST YEAR (YEAR 1) AND THEREAFTER ANNUALLY FOR THE NEXT FOUR YEARS (YEARS2, 3, 4, AND 5) FOLLOWING CONSTRUCTION FOR A TOTAL OF FIVE YEARS MINIMUM. FIRST-YEAR MONITORING WILL BEGIN IN THE FIRSTQUARTER (JANUARY-MARCH) SUBSEQUENT TO INSTALLATION. IN YEAR 1, A PLANT CENSUS WILL BE CONDUCTED USING THE BELTTRANSECTS DESCRIBED ABOVE. IN YEARS 2 THROUGH 5, REPRESENTATIVE SAMPLES OF THE MITIGATION AREA WILL BE ASSESSED ANDPROGRESS TOWARD THE PERFORMANCE STANDARDS MEASURED. NATIVE COVER WILL BE MEASURED ALONG TRANSECTS USINGLINE-INTERCEPT METHODS. INVASIVE SPECIES COVER WILL BE VISUALLY ESTIMATED IN EACH YEAR.IN YEAR 1, THE QUARTERLY MONITORING VISITS WILL RECORD MAINTENANCE ISSUES SUCH AS THE NEED FOR PLANT REPLACEMENT ANDINVASIVE SPECIES REMOVAL. FOLLOWING EACH VISIT, THE RESTORATION SPECIALIST WILL NOTIFY THE OWNER AND/OR MAINTENANCECREWS OF NECESSARY MAINTENANCE NEEDS. THE FOURTH QUARTER OF YEAR 1, THE EARLY FALL MONITORING VISIT, WILL INCLUDEPERFORMANCE STANDARD MEASUREMENTS AND A SUBSEQUENT ANNUAL REPORT SUBMITTED TO CITY OF RENTON. THE REPORT WILLCONTAIN:1.GENERAL SUMMARY OF THE SPRING VISIT.2.FIRST-YEAR AND SECOND-YEAR COUNTS OF PLANTS BY SPECIES IN THE PLANTED AREA USING BELT TRANSECTS ESTABLISHEDDURING THE AS-BUILT.3.COUNTS OF DEAD PLANTS WHERE MORTALITY IS SIGNIFICANT IN ANY MONITORING YEAR.4.ESTIMATE OF NATIVE SAPLING TREE AND SHRUB COVER USING THE LINE-INTERCEPT METHOD.5.ESTIMATE OF INVASIVE WEEDY COVER USING THE LINE-INTERCEPT METHOD.6.PHOTOGRAPHIC DOCUMENTATION FROM FIXED REFERENCE POINTS.7.INTRUSIONS INTO THE PLANTING AREAS, VANDALISM OR OTHER ACTIONS THAT IMPAIR THE INTENDED FUNCTIONS OF THE PLANTEDAREAS.8.RECOMMENDATIONS FOR MAINTENANCE OR REPAIR OF ANY PORTION OF THE MITIGATION AREA.CONSTRUCTION NOTES AND SPECIFICATIONSNOTE: SPECIFICATIONS FOR ITEMS IN BOLD CAN BE FOUND BELOW UNDER “MATERIAL SPECIFICATIONS AND DEFINITIONS.”NOTE: RECOMMEND HAVING THE WATERSHED COMPANY [(425) 822-5242] PERSONNEL, OR OTHER PERSONS QUALIFIED TO EVALUATEENVIRONMENTAL RESTORATION PROJECTS, SHALL MONITOR MITIGATION PLAN INSTALLATION. GENERALLY, THOSE INSPECTIONS COVER THEFOLLOWING:1. ALL SITE PREPARATIONa.INVASIVE PLANT REMOVAL.b.SOIL PREPARATION.2. PLANT MATERIAL INSPECTIONa.PLANT MATERIAL DELIVERY INSPECTION.b.PLANT INSTALLATION INSPECTION.3.FINAL INSTALLATION INSPECTIONa.TEMPORARY IRRIGATION IN-PLACEGENERAL WORK SEQUENCE1.ALL PLANT INSTALLATION IS TO TAKE PLACE DURING A FROST-FREE PERIOD IN THE DORMANT SEASON (OCTOBER 15TH - MARCH 30TH),FOR BEST SURVIVAL.2.PREPARE A PLANTING AREAS AND PREPARE PLANTING PITS PER THE DETAILS IN THIS PLAN SET (L003).3.APPLY WOOD CHIP MULCH RINGS TO INSTALLED PLANTS PER DETAIL 1 ON SHEET L004.4.INSTALL A TEMPORARY OR PERMANENT IRRIGATION SYSTEM TO PROVIDE FULL COVERAGE TO ALL PLANTS WITHIN RESTORING AREADURING THE MONITORING PERIOD.MATERIAL SPECIFICATIONS AND DEFINITIONS1.RESTORATION PROFESSIONAL: WATERSHED COMPANY [(425) 822-5242] PERSONNEL, OR OTHER PERSONS QUALIFIED TO EVALUATEENVIRONMENTAL RESTORATION PROJECTS.2.FERTILIZER: SLOW RELEASE, GRANULAR PHOSPHOROUS-FREE FERTILIZER. FOLLOW MANUFACTURER'S INSTRUCTIONS FORAPPLICATION. KEEP FERTILIZER IN A WEATHER-TIGHT CONTAINER WHILE ON SITE. NOTE THAT FERTILIZER IS TO BE APPLIED ONLY INYEARS 2, 3, 4 AND 5 AND NOT IN THE FIRST YEAR. DO NOT APPLY FERTILIZER TO INUNDATED OR PONDED AREAS OR AREAS THAT MAYBECOME INUNDATED.3.IRRIGATION SYSTEM: A SYSTEM CAPABLE OF DELIVERING AT LEAST TWO INCHES OF WATER PER WEEK FROM JUNE 1 THROUGHSEPTEMBER 30 FOR THE FIRST TWO YEARS FOLLOWING INSTALLATION.4.WOOD CHIP MULCH: 9-14.4(3) BARK OR WOOD CHIPS- WSDOT STANDARD SPEC. BARK OR WOOD CHIP MULCH SHALL BE DERIVED FROMDOUGLAS FIR, PINE, OR HEMLOCK SPECIES. IT SHALL NOT CONTAIN RESIN, TANNIN, OR OTHER COMPOUNDS IN QUANTITIES THATWOULD BE DETRIMENTAL TO PLANT LIFE. SAWDUST SHALL NOT BE USED AS MULCH.BARK OR WOOD CHIPS WHEN TESTED SHALL BE ACCORDING TO WSDOT TEST METHOD T 123 PRIOR PLACEMENT AND SHALL MEET THE FOLLOWING LOOSE VOLUME GRADATION:SIEVE SIZE PERCENT PASSINGMINIMUM MAXIMUM2″ 95100NO. 4 0 30MAINTENANCE PLANTHE SITE WILL BE MAINTAINED FOR FIVE YEARS FOLLOWING COMPLETION OF THE CONSTRUCTION. NOTE: SPECIFICATIONS FOR ITEMS INBOLD CAN BE FOUND ABOVE UNDER “MATERIAL SPECIFICATIONS AND DEFINITIONS.”1.REPLACE EACH PLANT FOUND DEAD IN THE SUMMER MONITORING VISITS DURING FROST-FREE PERIODS ONLY IN THE UPCOMING FALLDORMANT SEASON (OCTOBER 15 TO MARCH 30) FOR THE FIRST MONITORING YEAR. REPLACE PLANTS AS DIRECTED IN MONITORINGREPORTS FROM YEARS 2 THROUGH 5.2.FOLLOW THE RECOMMENDATIONS NOTED IN THE SPRING MONITORING SITE VISIT.3. GENERAL WEEDING FOR ALL PLANTED AREAS:a.AT LEAST TWICE YEARLY, REMOVE ALL COMPETING GRASS AND WEEDS, INCLUDING ROOTS, FROM BENEATH EACH INSTALLEDPLANT AND ANY DESIRABLE VOLUNTEER VEGETATION TO A DISTANCE OF 18 INCHES FROM THE MAIN PLANT STEM. WEEDINGSHOULD OCCUR AT LEAST TWICE DURING THE SPRING AND SUMMER. FREQUENT WEEDING WILL RESULT IN LOWER MORTALITYAND LOWER PLANT REPLACEMENT COSTS.b.MORE FREQUENT WEEDING MAY BE NECESSARY DEPENDING ON WEED CONDITIONS THAT DEVELOP AFTER PLAN INSTALLATION.c.DO NOT WEED THE AREA NEAR THE PLANT BASES WITH STRING TRIMMER (WEED WHACKER/WEED EATER). NATIVE PLANTS AREEASILY DAMAGED OR KILLED, AND WEEDS EASILY RECOVER AFTER TRIMMING.d.TO KEEP WEED COVERAGE THROUGHOUT THE PLANTING AREA BELOW THE 10% THRESHOLD, PROBLEM WEEDS SUCH ASHIMALAYAN BLACKBERRY SHOULD BE REMOVED FROM THE MITIGATION AREA DURING SPRING AND SUMMER MAINTENANCECHECKS.4.APPLY SLOW-RELEASE, PHOSPHOROUS-FREE GRANULAR FERTILIZER TO EACH INSTALLED PLANT ANNUALLY IN THE SPRING (BY JUNE1) OF YEARS 2 THROUGH 5. DO NOT APPLY FERTILIZER TO INUNDATED OR PONDED AREAS OR AREAS THAT MAY BECOME INUNDATED.5.RE-APPLY MULCH WOOD CHIPS AS NECESSARY TO MAINTAIN A 4-INCH-THICK, 18-INCH DIAMETER MULCH RINGS AND KEEP DOWNWEEDS.6.THE PROPERTY OWNER SHALL ENSURE THAT WATER IS PROVIDED FOR THE ENTIRE PLANTED AREA WITH A MINIMUM OF 2 INCHES OFWATER PROVIDED PER WEEK FROM JUNE 1 THROUGH SEPTEMBER 30 FOR THE FIRST TWO YEARS FOLLOWING INSTALLATIONTHROUGH THE OPERATION OF A TEMPORARY IRRIGATION SYSTEM.CONTINGENCIESIF THERE IS A SIGNIFICANT PROBLEM WITH THE RESTORATION AREAS MEETING PERFORMANCE STANDARDS, A CONTINGENCY PLAN WILL BEDEVELOPED AND IMPLEMENTED. CONTINGENCY PLANS CAN INCLUDE, BUT ARE NOT LIMITED TO: SOIL AMENDMENT, ADDITIONAL PLANTINSTALLATION, AND PLANT SUBSTITUTIONS OF TYPE, SIZE, QUANTITY, AND LOCATION.GENERAL NOTESQUALITY ASSURANCE1. PLANTS SHALL MEET OR EXCEED THE SPECIFICATIONS OF FEDERAL, STATE, AND LOCAL LAWS REQUIRING INSPECTION FOR PLANTDISEASE AND INSECT CONTROL.2. PLANTS SHALL BE HEALTHY, VIGOROUS, AND WELL-FORMED, WITH WELL DEVELOPED, FIBROUS ROOT SYSTEMS, FREE FROM DEADBRANCHES OR ROOTS. PLANTS SHALL BE FREE FROM DAMAGE CAUSED BY TEMPERATURE EXTREMES, LACK OR EXCESS OFMOISTURE, INSECTS, DISEASE, AND MECHANICAL INJURY. PLANTS IN LEAF SHALL BE WELL FOLIATED AND OF GOOD COLOR. PLANTSSHALL BE HABITUATED TO THE OUTDOOR ENVIRONMENTAL CONDITIONS INTO WHICH THEY WILL BE PLANTED (HARDENED-OFF).3. TREES WITH DAMAGED, CROOKED, MULTIPLE OR BROKEN LEADERS WILL BE REJECTED. WOODY PLANTS WITH ABRASIONS OF THEBARK OR SUN SCALD WILL BE REJECTED.4. NOMENCLATURE: PLANT NAMES SHALL CONFORM TO FLORA OF THE PACIFIC NORTHWEST BY HITCHCOCK AND CRONQUIST,UNIVERSITY OF WASHINGTON PRESS, 2018 AND/OR TO A FIELD GUIDE TO THE COMMON WETLAND PLANTS OF WESTERNWASHINGTON & NORTHWESTERN OREGON, ED. SARAH SPEAR COOKE, SEATTLE AUDUBON SOCIETY, 1997.DEFINITIONS1.PLANTS/PLANT MATERIALS. PLANTS AND PLANT MATERIALS SHALL INCLUDE ANY LIVE PLANT MATERIAL USED ON THE PROJECT. THISINCLUDES BUT IS NOT LIMITED TO CONTAINER GROWN, B&B OR BAREROOT PLANTS; LIVE STAKES AND FASCINES (WATTLES);TUBERS, CORMS, BULBS, ETC..; SPRIGS, PLUGS, AND LINERS.2.CONTAINER GROWN. CONTAINER GROWN PLANTS ARE THOSE WHOSE ROOTBALLS ARE ENCLOSED IN A POT OR BAG IN WHICH THATPLANT GREW.SUBSTITUTIONS1. IT IS THE CONTRACTOR'S RESPONSIBILITY TO OBTAIN SPECIFIED MATERIALS IN ADVANCE IF SPECIAL GROWING, MARKETING OROTHER ARRANGEMENTS MUST BE MADE IN ORDER TO SUPPLY SPECIFIED MATERIALS.2. SUBSTITUTION OF PLANT MATERIALS NOT ON THE PROJECT LIST WILL NOT BE PERMITTED UNLESS AUTHORIZED IN WRITING BY THERESTORATION CONSULTANT.3. IF PROOF IS SUBMITTED THAT ANY PLANT MATERIAL SPECIFIED IS NOT OBTAINABLE, A PROPOSAL WILL BE CONSIDERED FOR USE OFTHE NEAREST EQUIVALENT SIZE OR ALTERNATIVE SPECIES, WITH CORRESPONDING ADJUSTMENT OF CONTRACT PRICE.4. SUCH PROOF WILL BE SUBSTANTIATED AND SUBMITTED IN WRITING TO THE CONSULTANT AT LEAST 30 DAYS PRIOR TO START OFWORK UNDER THIS SECTION.INSPECTION1. PLANTS SHALL BE SUBJECT TO INSPECTION AND APPROVAL BY THE RESTORATION CONSULTANT FOR CONFORMANCE TOSPECIFICATIONS, EITHER AT TIME OF DELIVERY ON-SITE OR AT THE GROWER'S NURSERY. APPROVAL OF PLANT MATERIALS AT ANYTIME SHALL NOT IMPAIR THE SUBSEQUENT RIGHT OF INSPECTION AND REJECTION DURING PROGRESS OF THE WORK.2. PLANTS INSPECTED ON SITE AND REJECTED FOR NOT MEETING SPECIFICATIONS MUST BE REMOVED IMMEDIATELY FROM SITE ORRED-TAGGED AND REMOVED AS SOON AS POSSIBLE.3. THE RESTORATION CONSULTANT MAY ELECT TO INSPECT PLANT MATERIALS AT THE PLACE OF GROWTH. AFTER INSPECTION ANDACCEPTANCE, THE RESTORATION CONSULTANT MAY REQUIRE THE INSPECTED PLANTS BE LABELED AND RESERVED FOR PROJECT.SUBSTITUTION OF THESE PLANTS WITH OTHER INDIVIDUALS, EVEN OF THE SAME SPECIES AND SIZE, IS UNACCEPTABLE.MEASUREMENT OF PLANTS1. PLANTS SHALL CONFORM TO SIZES SPECIFIED UNLESS SUBSTITUTIONS ARE MADE AS OUTLINED IN THIS CONTRACT.2. HEIGHT AND SPREAD DIMENSIONS SPECIFIED REFER TO MAIN BODY OF PLANT AND NOT BRANCH OR ROOT TIP TO TIP. PLANTDIMENSIONS SHALL BE MEASURED WHEN THEIR BRANCHES OR ROOTS ARE IN THEIR NORMAL POSITION.3. WHERE A RANGE OF SIZE IS GIVEN, NO PLANT SHALL BE LESS THAN THE MINIMUM SIZE AND AT LEAST 50% OF THE PLANTS SHALL BEAS LARGE AS THE MEDIAN OF THE SIZE RANGE. (EXAMPLE: IF THE SIZE RANGE IS 12" TO 18", AT LEAST 50% OF PLANTS MUST BE 15"TALL.).SUBMITTALSPROPOSED PLANT SOURCES1. WITHIN 45 DAYS AFTER AWARD OF THE CONTRACT, SUBMIT A COMPLETE LIST OF PLANT MATERIALS PROPOSED TO BE PROVIDEDDEMONSTRATING CONFORMANCE WITH THE REQUIREMENTS SPECIFIED. INCLUDE THE NAMES AND ADDRESSES OF ALL GROWERSAND NURSERIES.PRODUCT CERTIFICATES1. PLANT MATERIALS LIST - SUBMIT DOCUMENTATION TO CONSULTANT AT LEAST 30 DAYS PRIOR TO START OF WORK UNDER THISSECTION THAT PLANT MATERIALS HAVE BEEN ORDERED. ARRANGE PROCEDURE FOR INSPECTION OF PLANT MATERIAL WITHCONSULTANT AT TIME OF SUBMISSION.2. HAVE COPIES OF VENDOR'S OR GROWERS' INVOICES OR PACKING SLIPS FOR ALL PLANTS ON SITE DURING INSTALLATION. INVOICEOR PACKING SLIP SHOULD LIST SPECIES BY SCIENTIFIC NAME, QUANTITY, AND DATE DELIVERED (AND GENETIC ORIGIN IF THATINFORMATION WAS PREVIOUSLY REQUESTED).DELIVERY, HANDLING, & STORAGENOTIFICATIONCONTRACTOR MUST NOTIFY CONSULTANT 48 HOURS OR MORE IN ADVANCE OF DELIVERIES SO THAT CONSULTANT MAY ARRANGE FORINSPECTION.PLANT MATERIALS1.TRANSPORTATION - DURING SHIPPING, PLANTS SHALL BE PACKED TO PROVIDE PROTECTION AGAINST CLIMATE EXTREMES,BREAKAGE AND DRYING. PROPER VENTILATION AND PREVENTION OF DAMAGE TO BARK, BRANCHES, AND ROOT SYSTEMS MUST BEENSURED.2.SCHEDULING AND STORAGE - PLANTS SHALL BE DELIVERED AS CLOSE TO PLANTING AS POSSIBLE. PLANTS IN STORAGE MUST BEPROTECTED AGAINST ANY CONDITION THAT IS DETRIMENTAL TO THEIR CONTINUED HEALTH AND VIGOR.3.HANDLING - PLANT MATERIALS SHALL NOT BE HANDLED BY THE TRUNK, LIMBS, OR FOLIAGE BUT ONLY BY THE CONTAINER, BALL,BOX, OR OTHER PROTECTIVE STRUCTURE, EXCEPT BAREROOT PLANTS SHALL BE KEPT IN BUNDLES UNTIL PLANTING AND THENHANDLED CAREFULLY BY THE TRUNK OR STEM.4.LABELS - PLANTS SHALL HAVE DURABLE, LEGIBLE LABELS STATING CORRECT SCIENTIFIC NAME AND SIZE. TEN PERCENT OFCONTAINER GROWN PLANTS IN INDIVIDUAL POTS SHALL BE LABELED. PLANTS SUPPLIED IN FLATS, RACKS, BOXES, BAGS, ORBUNDLES SHALL HAVE ONE LABEL PER GROUP.WARRANTYPLANT WARRANTYPLANTS MUST BE GUARANTEED TO BE TRUE TO SCIENTIFIC NAME AND SPECIFIED SIZE, AND TO BE HEALTHY AND CAPABLE OF VIGOROUSGROWTH.REPLACEMENT1.PLANTS NOT FOUND MEETING ALL OF THE REQUIRED CONDITIONS AT THE CONSULTANT'S DISCRETION MUST BE REMOVED FROMSITE AND REPLACED IMMEDIATELY AT THE CONTRACTOR'S EXPENSE.2.PLANTS NOT SURVIVING AFTER ONE YEAR TO BE REPLACED AT THE CONTRACTOR'S EXPENSE.PLANT MATERIALGENERAL1. PLANTS SHALL BE NURSERY GROWN IN ACCORDANCE WITH GOOD HORTICULTURAL PRACTICES UNDER CLIMATIC CONDITIONSSIMILAR TO OR MORE SEVERE THAN THOSE OF THE PROJECT SITE.2. PLANTS SHALL BE TRUE TO SPECIES AND VARIETY OR SUBSPECIES. NO CULTIVARS OR NAMED VARIETIES SHALL BE USED UNLESSSPECIFIED AS SUCH.QUANTITIESSEE PLANT LIST ON ACCOMPANYING PLANS AND PLANT SCHEDULES.ROOT TREATMENT1.CONTAINER GROWN PLANTS (INCLUDES PLUGS): PLANT ROOT BALLS MUST HOLD TOGETHER WHEN THE PLANT IS REMOVED FROMTHE POT, EXCEPT THAT A SMALL AMOUNT OF LOOSE SOIL MAY BE ON THE TOP OF THE ROOTBALL.2.PLANTS MUST NOT BE ROOT-BOUND; THERE MUST BE NO CIRCLING ROOTS PRESENT IN ANY PLANT INSPECTED.3.ROOTBALLS THAT HAVE CRACKED OR BROKEN WHEN REMOVED FROM THE CONTAINER SHALL BE REJECTED.PLANT INSTALLATION SPECIFICATIONS5
Appendix B
Bond Quantity Worksheet
Department of Permitting C24 Web date: 11/30/2012
and Environmental Review
35030 SE Douglas Street, Suite 210
Snoqualmie, WA 98065-9266
Prepared by:
Project Number: 200411
Applicant:Phone:(206)234-3243
PLANT MATERIALS*
Type Unit Price Unit Quantity Cost
PLANTS: Potted, 4" diameter, medium $5.00 Each 0 $ -
PLANTS: Container, 1 gallon, medium soil $11.50 Each 2024 $ 23,276.00
PLANTS: Container, 2 gallon, medium soil $20.00 Each 0 $ -
PLANTS: Container, 5 gallon, medium soil $36.00 Each 0 $ -
PLANTS: Seeding, by hand $0.50 SY 0 $ -
PLANTS: Slips (willow, red-osier)$2.00 Each 0 $ -
PLANTS: Stakes (willow)$2.00 Each 0 $ -
PLANTS: Stakes (willow)$2.00 Each 0 $ -
PLANTS: Flats/plugs $2.00 Each 0 $ -
* All costs include installation TOTAL $ 23,276.00
Type Unit Price Unit Cost
Compost, vegetable, delivered and spread $37.88 CY 45.00 $ 1,704.60
Decompacting till/hardpan, medium, to 6" depth $1.57 CY 0.00 $ -
Decompacting till/hardpan, medium, to 12" depth $1.57 CY 0.00 $ -
Hydroseeding $0.51 SY 5470.00 $ 2,789.70
Labor, general (landscaping)$40.00 HR 0.00 $ -
Labor, general (construction)$40.00 HR 0.00 $ -
Labor: Consultant, supervising $55.00 HR 0.00 $ -
Labor: Consultant, on-site re-design $95.00 HR 0.00 $ -
Rental of decompacting machinery & operator $70.00 HR 0.00 $ -
Sand, coarse builder's, delivered and spread $42.00 CY 0.00 $ -
Staking material (set per tree)$7.00 Each 0.00 $ -
Surveying, line & grade $250.00 HR 0.00 $ -
Surveying, topographical $250.00 HR 0.00 $ -
Watering, 1" of water, 50' soaker hose $3.62 MSF 0.00 $ -
Irrigation - temporary $3,000.00 Acre 0.56 $ 1,680.00
Irrigation - buried $4,500.00 Acre 0.00 $ -
Tilling topsoil, disk harrow, 20hp tractor, 4"-6" deep $1.02 SY 0.00 $ -
$25.00 HR 0.00 $ -
$ -
TOTAL $ 6,174.30
ITEMS Unit Cost Unit Cost
Fascines (willow) $ 2.00 Each 0.00 $ -
Logs, (cedar), w/ root wads, 16"-24" diam., 30' long $1,000.00 Each 0.00 $ -
Logs (cedar) w/o root wads, 16"-24" diam., 30'$400.00 Each 0.00 $ -
Logs, w/o root wads, 16"-24" diam., 30' long $245.00 Each 0.00 $ -
Logs w/ root wads, 16"-24" diam., 30' long $460.00 Each 0.00 $ -
Rocks, one-man $60.00 Each 0.00 $ -
Rocks, two-man $120.00 Each 0.00 $ -
Root wads $163.00 Each 0.00 $ -
Spawning gravel, type A $22.00 CY 0.00 $ -
Weir - log $1,500.00 Each 0.00 $ -
Weir - adjustable $2,000.00 Each 0.00 $ -
Woody debris, large $163.00 Each 0.00 $ -
Snags - anchored $400.00 Each 0.00 $ -
Snags - on site $50.00 Each 0.00 $ -
Snags - imported $800.00 Each 0.00 $ -
$ -
$ -
* All costs include delivery and installation TOTAL $ -
Critical Areas Mitigation
Bond Quantity Worksheet
Description
Groundcover Mix; Enhancement
Sage Presster on 05/26/2022
Project Description: Wetland Buffer Reduction w/ Enhancement Mitigation Plan
Project Name: Enclave Preliminary 5 Lot - Short Plat
For alternate formats, call 206-296-6600.
Print on legal-size (8 1/2 x 14") paper only.
Shrubs; Enhancement
HABITAT STRUCTURES*
INSTALLATION COSTS ( LABOR, EQUIPMENT, & OVERHEAD)
Location: 980 Hoquiam Avenue NE, Renton, WA 98059 Vijay Kakubal, Ramesh Vudathu
206-296-6600 TTY Relay: 711
Hydroseed for BSBL
Trees; Enhancement
2024 - 18" diameter mulch rings
24,460 SF buffer enhancement
ls-wks-sensareaBQ.xls ls-wks-sensareaBQ.pdf 10/30/2008 Page 1 of 3
EROSION CONTROL
ITEMS Unit Cost Unit Cost
Backfill and Compaction-embankment $ 4.89 CY 0.00 $ -
Crushed surfacing, 1 1/4" minus $30.00 CY 0.00 $ -
Ditching $7.03 CY 0.00 $ -
Excavation, bulk $4.00 CY 0.00 $ -
Fence, silt $1.60 LF 0.00 $ -
Jute Mesh $1.26 SY 0.00 $ -
Mulch, by hand, straw, 2" deep $1.27 SY 0.00 $ -
Mulch, by hand, wood chips, 2" deep $3.25 SY 0.00 $ -
Mulch, by machine, straw, 1" deep $0.32 SY 0.00 $ -
Piping, temporary, CPP, 6"$9.30 LF 0.00 $ -
Piping, temporary, CPP, 8"$14.00 LF 0.00 $ -
Piping, temporary, CPP, 12"$18.00 LF 0.00 $ -
Plastic covering, 6mm thick, sandbagged $2.00 SY 0.00 $ -
Rip Rap, machine placed, slopes $33.98 CY 0.00 $ -
Rock Constr. Entrance 100'x15'x1'$3,000.00 Each 0.00 $ -
Rock Constr. Entrance 50'x15'x1'$1,500.00 Each 0.00 $ -
Sediment pond riser assembly $1,695.11 Each 0.00 $ -
Sediment trap, 5' high berm $15.57 LF 0.00 $ -
Sediment trap, 5' high berm w/spillway incl. riprap $59.60 LF 0.00 $ -
Sodding, 1" deep, level ground $5.24 SY 0.00 $ -
Sodding, 1" deep, sloped ground $6.48 SY 0.00 $ -
Straw bales, place and remove $600.00 TON 0.00 $ -
Hauling and disposal $20.00 CY 0.00 $ -
Topsoil, delivered and spread $35.73 CY 0.00 $ -
$17.00 CY 0.00 $ -
$ -
TOTAL $ -
GENERAL ITEMS
ITEMS Unit Cost Unit Cost
Fencing, chain link, 6' high $18.89 LF 0.00 $ -
Fencing, chain link, corner posts $111.17 Each 0.00 $ -
Fencing, chain link, gate $277.63 Each 0.00 $ -
Fencing, split rail, 3' high (2-rail)$10.54 LF 405.00 $ 4,268.70
Fencing, temporary (NGPE)$1.20 LF 0.00 $ -
Signs, sensitive area boundary (inc. backing, post, install)$28.50 Each 0.00 $ -
$ -
$
$ -
TOTAL $ 4,268.70
$ 33,719.00
ITEMS
Percentage
of
Construction
Cost Unit Cost
Mobilization 10% $ 3,371.90
Contingency 30% $ 10,115.70
TOTAL $ 13,487.60
(Construction Cost Subtotal) OTHER
ls-wks-sensareaBQ.xls ls-wks-sensareaBQ.pdf 10/30/2008 Page 2 of 3
MAINTENANCE AND MONITORING
Maintenance, annual
Less than 1,000 sq.ft. and buffer mitigation only $ 1.08 SF 0.00 $ -
Less than 1,000 sq.ft. with wetland or aquatic area
mitigation $ 1.35 SF 0.00 $ -
Larger than 1,000 sq. ft. but less than 5,000 sq.ft. of buffer
mitigation $ 180.00 EACH 0.00 $ -
Larger than 1,000 sq. ft. but less than 5,000 sq.ft. of wetland
or aquatic area mitigation $ 270.00 EACH 0.00 $ -
Larger than 5,000 sq.ft. but < 1 acre -buffer mitigation only $ 360.00 EACH 5.00 $ 1,800.00
Larger than 5,000 sq.ft. but < 1 acre with wetland or aquatic
area mitigation $ 450.00 EACH 0.00 $ -
Larger than 1 acre but < 5 acres - buffer and / or wetland or
aquatic area mitigation $ 1,600.00 DAY 0.00 $ -
Larger than 5 acres - buffer and / or wetland or aquatic area
mitigation $ 2,000.00 DAY 0.00 $ -
Monitoring, annual
Larger than 1,000 sq.ft. but less than 5,000 wetland or
buffer mitigation $ 720.00 EACH 0.00 $ -
Larger than 5,000 sq.ft. but < 1 acre with wetland or aquatic
area impacts $ 900.00 EACH 8.00 $ 7,200.00
Larger than 1 acre but < 5 acres - buffer and / or wetland or
aquatic area impacts $ 1,440.00 DAY 0.00 $ -
Larger than5 acres - buffer and / or wetland or aquatic area
impacts $ 2,160.00 DAY 0.00 $ -
Maintenance and Monitoring Inspection (DDES), annual $350.00 EACH 5.00 $ 1,750.00
Maintenance and Monitoring Inspection (DDES), final $560.00 EACH 1.00 $ 560.00
TOTAL $ 11,310.00
Total $58,516.60
(4 hrs @ $140/hr)
(8 hrs @ 90/hr)
(10 hrs @ $90/hr)
(16 hrs @ $90/hr)
(24 hrs @ $90/hr)
(8 hrs @ 45/hr)
(2.5 hrs @ $140/hr)
(10 hrs @ $45/hr)
(WEC crew)
(1.25 X WEC crew)
(total for 3 annual events;
Includes monitoring)
(3 X SF total for 3 annual events;
Includes monitoring)
(6hr @$45/hr)
(4hr @$45/hr)
NOTE: Projects with multiple permit requirements may be required to have
longer monitoring and maintenance terms. This will be evaluated on a case-by-
case basis for development applications. Monitoring and maintance ranges may
be assessed anywhere from 5 to 10 years.
ls-wks-sensareaBQ.xls ls-wks-sensareaBQ.pdf 10/30/2008 Page 3 of 3
Appendix C
Wetland Rating Form and Data Sh eets
Wetland Rating System for Western WA: 2014 Update
Rating Form – Effective January 1, 2015
1
Wetland name or number: A
RATING SUMMARY – Western Washington
Name of wetland (or ID #): Wetland A Date of site visit: 04/17/2020
Rated by: J. Sloan, S. Presster Trained by Ecology? ☒Y ☐N Date of training: 09/25/2014
HGM Class used for rating: Depressional Wetland has multiple HGM classes? ☐Y ☒N
NOTE: Form is not complete without the figures requested (figures can be combined).
Source of base aerial photo/map: Google Earth
OVERALL WETLAND CATEGORY (based on functions ☒ or special characteristics ☐)
1. Category of wetland based on FUNCTIONS
☐ Category I – Total score = 23 - 27
☐ Category II – Total score = 20 - 22
☒ Category III – Total score = 16 - 19
☐ Category IV – Total score = 9 - 15
FUNCTION Improving
Water Quality
Hydrologic Habitat
Circle the appropriate ratings
Site Potential H M L H M L H M L
Landscape Potential H M L H M L H M L
Value H M L H M L H M L TOTAL
Score Based
on Ratings 6 8 4 18
2. Category based on SPECIAL CHARACTERISTICS of wetland
CHARACTERISTIC CATEGORY
Estuarine I II
Wetland of High Conservation Value I
Bog I
Mature Forest I
Old Growth Forest I
Coastal Lagoon I II
Interdunal I II III IV
None of the above ☒
Score for each
function based
on three
ratings
(order of ratings
is not
important)
9 = H,H,H
8 = H,H,M
7 = H,H,L
7 = H,M,M
6 = H,M,L
6 = M,M,M
5 = H,L,L
5 = M,M,L
4 = M,L,L
3 = L,L,L
Wetland Rating System for Western WA: 2014 Update
Rating Form – Effective January 1, 2015
2
Wetland name or number: A
Maps and figures required to answer questions correctly for
Western Washington
Depressional Wetlands
Map of: To answer questions: Figure #
Cowardin plant classes D 1.3, H 1.1, H 1.4 1
Hydroperiods D 1.4, H 1.2 2
Location of outlet (can be added to map of hydroperiods) D 1.1, D 4.1 2
Boundary of area within 150 ft of the wetland (can be added to another figure) D 2.2, D 5.2 2
Map of the contributing basin D 4.3, D 5.3 3
1 km Polygon: Area that extends 1 km from entire wetland edge - including
polygons for accessible habitat and undisturbed habitat
H 2.1, H 2.2, H 2.3 4
Screen capture of map of 303(d) listed waters in basin (from Ecology website) D 3.1, D 3.2 5
Screen capture of list of TMDLs for WRIA in which unit is found (from web) D 3.3 6
Wetland Rating System for Western WA: 2014 Update
Rating Form – Effective January 1, 2015
3
Wetland name or number: Wetland A
HGM Classification of Wetlands in Western Washington
1. Are the water levels in the entire unit usually controlled by tides except during floods?
☒NO – go to 2 ☐YES – the wetland class is Tidal Fringe – go to 1.1
1.1 Is the salinity of the water during periods of annual low flow below 0.5 ppt (parts per thousand)?
NO – Saltwater Tidal Fringe (Estuarine) YES – Freshwater Tidal Fringe
If your wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine wetlands. If it
is Saltwater Tidal Fringe it is an Estuarine wetland and is not scored. This method cannot be used to
score functions for estuarine wetlands.
2. The entire wetland unit is flat and precipitation is the only source (>90%) of water to it. Groundwater
and surface water runoff are NOT sources of water to the unit.
☒NO – go to 3 ☐YES – The wetland class is Flats
If your wetland can be classified as a Flats wetland, use the form for Depressional wetlands.
3. Does the entire wetland unit meet all of the following criteria?
☐The vegetated part of the wetland is on the shores of a body of permanent open water (without any
plants on the surface at any time of the year) at least 20 ac (8 ha) in size;
☐At least 30% of the open water area is deeper than 6.6 ft (2 m).
☒NO – go to 4 ☐YES – The wetland class is Lake Fringe (Lacustrine Fringe)
4. Does the entire wetland unit meet all of the following criteria?
☐The wetland is on a slope (slope can be very gradual),
☐The water flows through the wetland in one direction (unidirectional) and usually comes from
seeps. It may flow subsurface, as sheetflow, or in a swale without distinct banks,
☐The water leaves the wetland without being impounded.
☒NO – go to 5 ☐YES – The wetland class is Slope
NOTE: Surface water does not pond in these type of wetlands except occasionally in very small and
shallow depressions or behind hummocks (depressions are usually <3 ft diameter and less than 1 ft
deep).
5. Does the entire wetland unit meet all of the following criteria?
☐The unit is in a valley, or stream channel, where it gets inundated by overbank flooding from that
stream or river,
☐The overbank flooding occurs at least once every 2 years.
For questions 1-7, the criteria described must apply to the entire unit being rated.
If the hydrologic criteria listed in each question do not apply to the entire unit being rated, you
probably have a unit with multiple HGM classes. In this case, identify which hydrologic criteria in
questions 1-7 apply, and go to Question 8.
Wetland Rating System for Western WA: 2014 Update
Rating Form – Effective January 1, 2015
4
Wetland name or number: Wetland A
☒NO – go to 6 ☐YES – The wetland class is Riverine
NOTE: The Riverine unit can contain depressions that are filled with water when the river is not
flooding
6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the
surface, at some time during the year? This means that any outlet, if present, is higher than the interior
of the wetland.
☐NO – go to 7 ☒YES – The wetland class is Depressional
7. Is the entire wetland unit located in a very flat area with no obvious depression and no overbank
flooding? The unit does not pond surface water more than a few inches. The unit seems to be
maintained by high groundwater in the area. The wetland may be ditched, but has no obvious natural
outlet.
☐NO – go to 8 ☐YES – The wetland class is Depressional
8. Your wetland unit seems to be difficult to classify and probably contains several different HGM
classes. For example, seeps at the base of a slope may grade into a riverine floodplain, or a small
stream within a Depressional wetland has a zone of flooding along its sides. GO BACK AND IDENTIFY
WHICH OF THE HYDROLOGIC REGIMES DESCRIBED IN QUESTIONS 1-7 APPLY TO DIFFERENT
AREAS IN THE UNIT (make a rough sketch to help you decide). Use the following table to identify the
appropriate class to use for the rating system if you have several HGM classes present within the
wetland unit being scored.
NOTE: Use this table only if the class that is recommended in the second column represents 10% or
more of the total area of the wetland unit being rated. If the area of the HGM class listed in column 2
is less than 10% of the unit; classify the wetland using the class that represents more than 90% of the
total area.
HGM classes within the wetland unit
being rated
HGM class to
use in rating
Slope + Riverine Riverine
Slope + Depressional Depressional
Slope + Lake Fringe Lake Fringe
Depressional + Riverine along stream
within boundary of depression
Depressional
Depressional + Lake Fringe Depressional
Riverine + Lake Fringe Riverine
Salt Water Tidal Fringe and any other
class of freshwater wetland
Treat as
ESTUARINE
If you are still unable to determine which of the above criteria apply to your wetland, or if you have
more than 2 HGM classes within a wetland boundary, classify the wetland as Depressional for the
rating.
Wetland Rating System for Western WA: 2014 Update
Rating Form – Effective January 1, 2015
5
Wetland name or number: Wetland A
DEPRESSIONAL AND FLATS WETLANDS
Water Quality Functions - Indicators that the site functions to improve water quality
D 1.0. Does the site have the potential to improve water quality?
D 1.1. Characteristics of surface water outflows from the wetland:
☐ Wetland is a depression or flat depression (QUESTION 7 on key) with no surface water leaving it (no outlet).
points = 3
☒ Wetland has an intermittently flowing stream or ditch, OR highly constricted permanently flowing outlet.
points = 2
☐ Wetland has an unconstricted, or slightly constricted, surface outlet that is permanently flowing. points = 1
☐ Wetland is a flat depression (QUESTION 7 on key), whose outlet is a permanently flowing ditch. points = 1
2
D 1.2. The soil 2 in below the surface (or duff layer) is true clay or true organic (use NRCS definitions).☐Yes = 4 ☒No = 0 0
D 1.3. Characteristics and distribution of persistent plants (Emergent, Scrub-shrub, and/or Forested Cowardin classes):
☐ Wetland has persistent, ungrazed, plants > 95% of area points = 5
☒ Wetland has persistent, ungrazed, plants > 1/2 of area points = 3
☐ Wetland has persistent, ungrazed plants > 1/10 of area points = 1
☐ Wetland has persistent, ungrazed plants < 1/10 of area points = 0
3
D 1.4. Characteristics of seasonal ponding or inundation:
This is the area that is ponded for at least 2 months. See description in manual.
☒ Area seasonally ponded is > ½ total area of wetland points = 4
☐ Area seasonally ponded is > ¼ total area of wetland points = 2
☐ Area seasonally ponded is < ¼ total area of wetland points = 0
4
Total for D 1 Add the points in the boxes above 9
Rating of Site Potential If score is: ☐12-16 = H ☒6-11 = M ☐0-5 = L Record the rating on the first page
D 2.0. Does the landscape have the potential to support the water quality function of the site?
D 2.1. Does the wetland unit receive stormwater discharges? ☒Yes = 1 ☐No = 0 1
D 2.2. Is > 10% of the area within 150 ft of the wetland in land uses that generate pollutants? ☒Yes = 1 ☐No = 0 1
D 2.3. Are there septic systems within 250 ft of the wetland? ☐Yes = 1 ☒No = 0 0
D 2.4. Are there other sources of pollutants coming into the wetland that are not listed in
questions D 2.1-D 2.3? Source: n/a ☐Yes = 1 ☒No = 0 0
Total for D 2 Add the points in the boxes above 2
Rating of Landscape Potential If score is: ☐3 or 4 = H ☒1 or 2 = M ☐0 = L Record the rating on the first page
D 3.0. Is the water quality improvement provided by the site valuable to society?
D 3.1. Does the wetland discharge directly (i.e., within 1 mi) to a stream, river, lake, or marine
water that is on the 303(d) list? ☐Yes = 1 ☒No = 0 0
D 3.2. Is the wetland in a basin or sub-basin where an aquatic resource is on the 303(d) list? ☒Yes = 1 ☐No = 0 1
D 3.3. Has the site been identified in a watershed or local plan as important for maintaining water quality
(answer YES if there is a TMDL for the basin in which the unit is found)? ☐Yes = 2 ☒No = 0 0
Total for D 3 Add the points in the boxes above 1
Rating of Value If score is: ☐2-4 = H ☒1 = M ☐0 = L Record the rating on the first page
Wetland Rating System for Western WA: 2014 Update
Rating Form – Effective January 1, 2015
6
Wetland name or number: Wetland A
DEPRESSIONAL AND FLATS WETLANDS
Hydrologic Functions - Indicators that the site functions to reduce flooding and stream degradation
D 4.0. Does the site have the potential to reduce flooding and erosion?
D 4.1. Characteristics of surface water outflows from the wetland:
☐ Wetland is a depression or flat depression with no surface water leaving it (no outlet). points = 4
☒ Wetland has an intermittently flowing stream or ditch, OR highly constricted permanently
flowing outlet. points = 2
☐ Wetland is a flat depression (QUESTION 7 on key), whose outlet is a permanently flowing ditch. points = 1
☐ Wetland has an unconstricted, or slightly constricted, surface outlet that is permanently flowing. points = 0
2
D 4.2. Depth of storage during wet periods: Estimate the height of ponding above the bottom of the outlet. For wetlands
with no outlet, measure from the surface of permanent water or if dry, the deepest part.
☐ Marks of ponding are 3 ft or more above the surface or bottom of outlet. points = 7
☒ Marks of ponding between 2 ft to < 3 ft from surface or bottom of outlet. points = 5
☐ Marks are at least 0.5 ft to < 2 ft from surface or bottom of outlet. points = 3
☐ The wetland is a “headwater” wetland. points = 3
☐ Wetland is flat but has small depressions on the surface that trap water. points = 1
☐ Marks of ponding less than 0.5 ft (6 in). points = 0
5
D 4.3. Contribution of the wetland to storage in the watershed: Estimate the ratio of the area of upstream basin
contributing surface water to the wetland to the area of the wetland unit itself.
☒ The area of the basin is less than 10 times the area of the unit. points = 5
☐ The area of the basin is 10 to 100 times the area of the unit. points = 3
☐ The area of the basin is more than 100 times the area of the unit. points = 0
☐ Entire wetland is in the Flats class. points = 5
5
Total for D 4 Add the points in the boxes above 12
Rating of Site Potential If score is: ☒12-16 = H ☐6-11 = M ☐0-5 = L Record the rating on the first page
D 5.0. Does the landscape have the potential to support hydrologic functions of the site?
D 5.1. Does the wetland receive stormwater discharges? ☒Yes = 1 ☐No = 0 1
D 5.2. Is >10% of the area within 150 ft of the wetland in land uses that generate excess runoff? ☒Yes = 1 ☐No = 0 1
D 5.3. Is more than 25% of the contributing basin of the wetland covered with intensive human land uses (residential at
>1 residence/ac, urban, commercial, agriculture, etc.)? ☒Yes = 1 ☐No = 0 1
Total for D 5 Add the points in the boxes above 3
Rating of Landscape Potential If score is: ☒3 = H ☐1 or 2 = M ☐0 = L Record the rating on the first page
D 6.0. Are the hydrologic functions provided by the site valuable to society?
D 6.1. The unit is in a landscape that has flooding problems. Choose the description that best matches conditions around
the wetland unit being rated. Do not add points. Choose the highest score if more than one condition is met.
The wetland captures surface water that would otherwise flow down-gradient into areas where flooding has
damaged human or natural resources (e.g., houses or salmon redds):
• ☐ Flooding occurs in a sub-basin that is immediately down-gradient of unit. points = 2
• ☒ Surface flooding problems are in a sub-basin farther down-gradient. points = 1
☐ Flooding from groundwater is an issue in the sub-basin. points = 1
☐ The existing or potential outflow from the wetland is so constrained by human or natural conditions that
the water stored by the wetland cannot reach areas that flood.
Explain why: points = 0
☐There are no problems with flooding downstream of the wetland. points = 0
1
D 6.2. Has the site been identified as important for flood storage or flood conveyance in a regional flood control plan?
☐Yes = 2 ☒No = 0 0
Total for D 6 Add the points in the boxes above 1
Rating of Value If score is: ☐2-4 = H ☒1 = M ☐0 = L Record the rating on the first page
Wetland name or number: Wetland A
Wetland Rating System for Western WA: 2014 Update
Rating Form – Effective January 1, 2015
7
These questions apply to wetlands of all HGM classes.
HABITAT FUNCTIONS - Indicators that site functions to provide important habitat
H 1.0. Does the site have the potential to provide habitat?
H 1.1. Structure of plant community: Indicators are Cowardin classes and strata within the Forested class. Check the
Cowardin plant classes in the wetland. Up to 10 patches may be combined for each class to meet the threshold
of ¼ ac or more than 10% of the unit if it is smaller than 2.5 ac. Add the number of structures checked.
☐ Aquatic bed 4 structures or more: points = 4
☒ Emergent 3 structures: points = 2
☒ Scrub-shrub (areas where shrubs have > 30% cover) 2 structures: points = 1
☒ Forested (areas where trees have > 30% cover) 1 structure: points = 0
If the unit has a Forested class, check if:
☐ The Forested class has 3 out of 5 strata (canopy, sub-canopy, shrubs, herbaceous, moss/ground-cover)
that each cover 20% within the Forested polygon
2
H 1.2. Hydroperiods
Check the types of water regimes (hydroperiods) present within the wetland. The water regime has to cover
more than 10% of the wetland or ¼ ac to count (see text for descriptions of hydroperiods).
☐ Permanently flooded or inundated 4 or more types present: points = 3
☒ Seasonally flooded or inundated 3 types present: points = 2
☒ Occasionally flooded or inundated 2 types present: points = 1
☒ Saturated only 1 type present: points = 0
☐ Permanently flowing stream or river in, or adjacent to, the wetland
☐ Seasonally flowing stream in, or adjacent to, the wetland
☐ Lake Fringe wetland 2 points
☐ Freshwater tidal wetland 2 points
2
H 1.3. Richness of plant species
Count the number of plant species in the wetland that cover at least 10 ft2.
Different patches of the same species can be combined to meet the size threshold and you do not have to name
the species. Do not include Eurasian milfoil, reed canarygrass, purple loosestrife, Canadian thistle
If you counted: ☐ > 19 species points = 2
☒ 5 - 19 species points = 1
☐ < 5 species points = 0
1
H 1.4. Interspersion of habitats
Decide from the diagrams below whether interspersion among Cowardin plants classes (described in H 1.1), or
the classes and unvegetated areas (can include open water or mudflats) is high, moderate, low, or none. If you
have four or more plant classes or three classes and open water, the rating is always high.
☐ None = 0 points ☐ Low = 1 point ☒ Moderate = 2 points
All three diagrams in
this row are
☐ HIGH = 3points
2
Wetland name or number: Wetland A
Wetland Rating System for Western WA: 2014 Update
Rating Form – Effective January 1, 2015
8
H 1.5. Special habitat features:
Check the habitat features that are present in the wetland. The number of checks is the number of points.
☒ Large, downed, woody debris within the wetland (> 4 in diameter and 6 ft long).
☒ Standing snags (dbh > 4 in) within the wetland.
☐ Undercut banks are present for at least 6.6 ft (2 m) AND/OR overhanging plants extends at least 3.3 ft (1 m)
over a stream (or ditch) in, or contiguous with the wetland, for at least 33 ft (10 m).
☐ Stable steep banks of fine material that might be used by beaver or muskrat for denning (> 30 degree
slope) OR signs of recent beaver activity are present (cut shrubs or trees that have not yet weathered
where wood is exposed).
☒ At least ¼ ac of thin-stemmed persistent plants or woody branches are present in areas that are
permanently or seasonally inundated (structures for egg-laying by amphibians).
☐ Invasive plants cover less than 25% of the wetland area in every stratum of plants (see H 1.1 for list of
strata).
3
Total for H 1 Add the points in the boxes above 10
Rating of Site Potential If score is: ☐15-18 = H ☒7-14 = M ☐0-6 = L Record the rating on the first page
H 2.0. Does the landscape have the potential to support the habitat functions of the site?
H 2.1. Accessible habitat (include only habitat that directly abuts wetland unit).
Calculate: % undisturbed habitat + [(%moderate and low intensity land uses)/2] = 0% + (0.7%/2) = 0.35%
If total accessible habitat is:
☐ > 1/3 (33.3%) of 1 km Polygon points = 3
☐ 20-33% of 1 km Polygon points = 2
☐ 10-19% of 1 km Polygon points = 1
☒ < 10% of 1 km Polygon points = 0
0
H 2.2. Undisturbed habitat in 1 km Polygon around the wetland.
Calculate: % undisturbed habitat + [(%moderate and low intensity land uses)/2 = 13.2% + (9.2%/2) = 17.8%
☐ Undisturbed habitat > 50% of Polygon points = 3
☐ Undisturbed habitat 10-50% and in 1-3 patches points = 2
☒ Undisturbed habitat 10-50% and > 3 patches points = 1
☐ Undisturbed habitat < 10% of 1 km Polygon points = 0
1
H 2.3. Land use intensity in 1 km Polygon: If
☒ > 50% of 1 km Polygon is high intensity land use points = (- 2)
☐ ≤ 50% of 1 km Polygon is high intensity points = 0
-2
Total for H 2 Add the points in the boxes above -1
Rating of Landscape Potential If score is: ☐4-6 = H ☐1-3 = M ☒< 1 = L Record the rating on the first page
H 3.0. Is the habitat provided by the site valuable to society?
H 3.1. Does the site provide habitat for species valued in laws, regulations, or policies? Choose only the highest score
that applies to the wetland being rated.
Site meets ANY of the following criteria: points = 2
☐ It has 3 or more priority habitats within 100 m (see next page)
☐ It provides habitat for Threatened or Endangered species (any plant or animal on the state or federal lists)
☐ It is mapped as a location for an individual WDFW priority species
☐ It is a Wetland of High Conservation Value as determined by the Department of Natural Resources
☐ It has been categorized as an important habitat site in a local or regional comprehensive plan,
in a Shoreline Master Plan, or in a watershed plan
☐ Site has 1 or 2 priority habitats (listed on next page) within 100 m points = 1
☒ Site does not meet any of the criteria above points = 0
0
Rating of Value If score is: ☐2 = H ☐1 = M ☒0 = L Record the rating on the first page
Wetland name or number: Wetland A
Wetland Rating System for Western WA: 2014 Update
Rating Form – Effective January 1, 2015
9
WDFW Priority Habitats
Priority habitats listed by WDFW (see complete descriptions of WDFW priority habitats, and the counties in which they can
be found, in: Washington Department of Fish and Wildlife. 2008. Priority Habitat and Species List. Olympia, Washington.
177 pp. http://wdfw.wa.gov/publications/00165/wdfw00165.pdf or access the list from here:
http://wdfw.wa.gov/conservation/phs/list/)
Count how many of the following priority habitats are within 330 ft (100 m) of the wetland unit: NOTE: This question is
independent of the land use between the wetland unit and the priority habitat.
☐ Aspen Stands: Pure or mixed stands of aspen greater than 1 ac (0.4 ha).
☐ Biodiversity Areas and Corridors: Areas of habitat that are relatively important to various species of native fish
and wildlife (full descriptions in WDFW PHS report).
☐ Herbaceous Balds: Variable size patches of grass and forbs on shallow soils over bedrock.
☐ Old-growth/Mature forests: Old-growth west of Cascade crest – Stands of at least 2 tree species, forming a
multi- layered canopy with occasional small openings; with at least 8 trees/ac (20 trees/ha ) > 32 in (81 cm) dbh
or > 200 years of age. Mature forests – Stands with average diameters exceeding 21 in (53 cm) dbh; crown cover
may be less than 100%; decay, decadence, numbers of snags, and quantity of large downed material is generally
less than that found in old-growth; 80-200 years old west of the Cascade crest.
☐ Oregon White Oak: Woodland stands of pure oak or oak/conifer associations where canopy coverage of the
oak component is important (full descriptions in WDFW PHS report p. 158 – see web link above).
☐ Riparian: The area adjacent to aquatic systems with flowing water that contains elements of both aquatic
and terrestrial ecosystems which mutually influence each other.
☐ Westside Prairies: Herbaceous, non-forested plant communities that can either take the form of a dry prairie or a
wet prairie (full descriptions in WDFW PHS report p. 161 – see web link above).
☐ Instream: The combination of physical, biological, and chemical processes and conditions that interact to
provide functional life history requirements for instream fish and wildlife resources.
☐ Nearshore: Relatively undisturbed nearshore habitats. These include Coastal Nearshore, Open Coast Nearshore,
and Puget Sound Nearshore. (full descriptions of habitats and the definition of relatively undisturbed are in WDFW
report – see web link on previous page).
☐ Caves: A naturally occurring cavity, recess, void, or system of interconnected passages under the earth in soils,
rock, ice, or other geological formations and is large enough to contain a human.
☐ Cliffs: Greater than 25 ft (7.6 m) high and occurring below 5000 ft elevation.
☐ Talus: Homogenous areas of rock rubble ranging in average size 0.5 - 6.5 ft (0.15 - 2.0 m), composed of basalt,
andesite, and/or sedimentary rock, including riprap slides and mine tailings. May be associated with cliffs.
☐ Snags and Logs: Trees are considered snags if they are dead or dying and exhibit sufficient decay characteristics to
enable cavity excavation/use by wildlife. Priority snags have a diameter at breast height of > 20 in (51 cm) in western
Washington and are > 6.5 ft (2 m) in height. Priority logs are > 12 in (30 cm) in diameter at the largest end, and > 20 ft
(6 m) long.
Note: All vegetated wetlands are by definition a priority habitat but are not included in this list because they are addressed
elsewhere.
Wetland name or number: Wetland A
Wetland Rating System for Western WA: 2014 Update
Rating Form – Effective January 1, 2015
10
CATEGORIZATION BASED ON SPECIAL CHARACTERISTICS
Wetland Type
Check off any criteria that apply to the wetland. Circle the category when the appropriate criteria are met.
Category
SC 1.0. Estuarine wetlands
Does the wetland meet the following criteria for Estuarine wetlands?
☐ The dominant water regime is tidal,
☐ Vegetated, and
☐ With a salinity greater than 0.5 ppt ☐Yes –Go to SC 1.1 ☒No= Not an estuarine wetland
SC 1.1. Is the wetland within a National Wildlife Refuge, National Park, National Estuary Reserve, Natural Area
Preserve, State Park or Educational, Environmental, or Scientific Reserve designated under WAC 332-30-151?
☐Yes = Category I ☐No - Go to SC 1.2
Cat. I
SC 1.2. Is the wetland unit at least 1 ac in size and meets at least two of the following three conditions?
☐ The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing, and has
less than 10% cover of non-native plant species. (If non-native species are Spartina, see page 25)
☐ At least ¾ of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-grazed or
un- mowed grassland.
☐ The wetland has at least two of the following features: tidal channels, depressions with open water,
or contiguous freshwater wetlands. ☐Yes = Category I ☐No= Category II
Cat. I
Cat. II
SC 2.0. Wetlands of High Conservation Value (WHCV)
SC 2.1. Has the WA Department of Natural Resources updated their website to include the list of Wetlands of High
Conservation Value? ☒Yes – Go to SC 2.2 ☐No – Go to SC 2.3
SC 2.2. Is the wetland listed on the WDNR database as a Wetland of High Conservation Value?
http://www.dnr.wa.gov/NHPwetlandviewer ☐Yes = Category I ☒No = Not a WHCV
SC 2.3. Is the wetland in a Section/Township/Range that contains a Natural Heritage wetland?
http://file.dnr.wa.gov/publications/amp_nh_wetlands_trs.pdf
☐Yes – Contact WNHP/WDNR and go to SC 2.4 ☐No = Not a WHCV
SC 2.4. Has WDNR identified the wetland within the S/T/R as a Wetland of High Conservation Value and listed it on
their website? ☐Yes = Category I ☐No = Not a WHCV
Cat. I
SC 3.0. Bogs
Does the wetland (or any part of the unit) meet both the criteria for soils and vegetation in bogs? Use the key
below. If you answer YES you will still need to rate the wetland based on its functions.
SC 3.1. Does an area within the wetland unit have organic soil horizons, either peats or mucks, that compose 16 in or
more of the first 32 in of the soil profile? ☐Yes – Go to SC 3.3 ☒No – Go to SC 3.2
SC 3.2. Does an area within the wetland unit have organic soils, either peats or mucks, that are less than 16 in deep
over bedrock, or an impermeable hardpan such as clay or volcanic ash, or that are floating on top of a lake or
pond? ☐Yes – Go to SC 3.3 ☒No = Is not a bog
SC 3.3. Does an area with peats or mucks have more than 70% cover of mosses at ground level, AND at least a 30%
cover of plant species listed in Table 4? ☐Yes = Is a Category I bog ☐No – Go to SC 3.4
NOTE: If you are uncertain about the extent of mosses in the understory, you may substitute that criterion by
measuring the pH of the water that seeps into a hole dug at least 16 in deep. If the pH is less than 5.0 and the
plant species in Table 4 are present, the wetland is a bog.
SC 3.4. Is an area with peats or mucks forested (> 30% cover) with Sitka spruce, subalpine fir, western red cedar,
western hemlock, lodgepole pine, quaking aspen, Engelmann spruce, or western white pine, AND any of the
species (or combination of species) listed in Table 4 provide more than 30% of the cover under the canopy?
☐Yes = Is a Category I bog ☐No = Is not a
bog
Cat. I
Wetland name or number: Wetland A
Wetland Rating System for Western WA: 2014 Update
Rating Form – Effective January 1, 2015
11
SC 4.0. Forested Wetlands
Does the wetland have at least 1 contiguous acre of forest that meets one of these criteria for the WA
Department of Fish and Wildlife’s forests as priority habitats? If you answer YES you will still need to rate
the wetland based on its functions.
☐ Old-growth forests (west of Cascade crest): Stands of at least two tree species, forming a multi-layered
canopy with occasional small openings; with at least 8 trees/ac (20 trees/ha) that are at least 200 years of
age OR have a diameter at breast height (dbh) of 32 in (81 cm) or more.
☐ Mature forests (west of the Cascade Crest): Stands where the largest trees are 80- 200 years old OR
the species that make up the canopy have an average diameter (dbh) exceeding 21 in (53 cm).
☐Yes = Category I ☒No = Not a forested wetland for this section
Cat. I
SC 5.0. Wetlands in Coastal Lagoons
Does the wetland meet all of the following criteria of a wetland in a coastal lagoon?
☐ The wetland lies in a depression adjacent to marine waters that is wholly or partially separated
from marine waters by sandbanks, gravel banks, shingle, or, less frequently, rocks
☐ The lagoon in which the wetland is located contains ponded water that is saline or brackish (> 0.5
ppt) during most of the year in at least a portion of the lagoon (needs to be measured near the
bottom)
☐Yes – Go to SC 5.1 ☒No = Not a wetland in a coastal lagoon
SC 5.1. Does the wetland meet all of the following three conditions?
☐ The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing), and has
less than 20% cover of aggressive, opportunistic plant species (see list of species on p. 100).
☐ At least ¾ of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-grazed or
un- mowed grassland.
☐ The wetland is larger than 1/10 ac (4350 ft2)
☐Yes = Category I ☐No = Category II
Cat. I
Cat. II
SC 6.0. Interdunal Wetlands
Is the wetland west of the 1889 line (also called the Western Boundary of Upland Ownership or WBUO)? If
you answer yes you will still need to rate the wetland based on its habitat functions.
In practical terms that means the following geographic areas:
☐ Long Beach Peninsula: Lands west of SR 103
☐ Grayland-Westport: Lands west of SR 105
☐ Ocean Shores-Copalis: Lands west of SR 115 and SR 109
☐Yes – Go to SC 6.1 ☒No = not an interdunal wetland for rating
SC 6.1. Is the wetland 1 ac or larger and scores an 8 or 9 for the habitat functions on the form (rates H,H,H or H,H,M
for the three aspects of function)? ☐Yes = Category I ☐No – Go to SC 6.2
SC 6.2. Is the wetland 1 ac or larger, or is it in a mosaic of wetlands that is 1 ac or larger?
☐Yes = Category II ☐No – Go to SC 6.3
SC 6.3. Is the unit between 0.1 and 1 ac, or is it in a mosaic of wetlands that is between 0.1 and 1 ac?
☐Yes = Category III ☐No = Category IV
Cat I
Cat. II
Cat. III
Cat. IV
Category of wetland based on Special Characteristics
If you answered No for all types, enter “Not Applicable” on Summary Form NA
Wetland Rating System for Western WA: 2014 Update
Rating Form – Effective January 1, 2015
12
Wetland name or number: Click here to enter text.
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2014 Ecology Wetland Rating Form Figures
K AKUBAL P ROPERTY
Wetland A (Depressional) ............................................................................................................................. 1
Figure 1. Cowardin plant classes – D1.3, H1.1, H1.4 ................................................................................ 1
Figure 2. Hydroperiods, outlet(s), and 150-ft area – D1.1, D1.4, H1.2, D2.2, D5.2 .................................. 2
Figure 3. Map of the contributing basin – D4.3, D5.3 .............................................................................. 3
Figure 4. Undisturbed habitat and moderate-low intensity land uses within 1 km from wetland edge
including polygon for accessible habitat – H2.1, H2.2, H2.3 .................................................. 4
Figure 5. Screen-capture of 303(d) listed waters in basin – D3.1, D3.2 ................................................... 5
Figure 6. Screen-capture of TMDL map for sub-basin in which unit is found – D3.3 ............................... 6
Page left blank intentionally to allow for duplex printing.
Features depicted are not to scale. Sketches are based on available data and best professional
judgment.
Wetland Figures - 1
WETLAND A (DEPRESSIONAL)
Figure 1. Cowardin plant classes – D1.3, H1.1, H1.4
Features depicted are not to scale. Sketches are based on available data and best professional
judgment.
Wetland Figures - 2
Figure 2. Hydroperiods, outlet(s), and 150-ft area – D1.1, D1.4, H1.2, D2.2, D5.2
Outlet
(Culvert)
Features depicted are not to scale. Sketches are based on available data and best professional
judgment.
Wetland Figures - 3
Figure 3. Map of the contributing basin – D4.3, D5.3
Contributing basin
Wetland unit
Features depicted are not to scale. Sketches are based on available data and best professional
judgment.
Wetland Figures - 4
Figure 4. Undisturbed habitat and moderate-low intensity land uses within 1 km from wetland edge
including polygon for accessible habitat – H2.1, H2.2, H2.3
Features depicted are not to scale. Sketches are based on available data and best professional
judgment.
Wetland Figures - 5
Figure 5. Screen-capture of 303(d) listed waters in basin – D3.1, D3.2
Wetland Unit
Features depicted are not to scale. Sketches are based on available data and best professional
judgment.
Wetland Figures - 6
Figure 6. Screen-capture of TMDL map for sub-basin in which unit is found – D3.3
Wetland unit
located in the May
Creek Sub-basin
US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0
DP - 1
Project/Site: 980 Hoquim Avenue NE / Parcel #1023059060 City/County: Renton / King County Sampling date: 04-17-2020
Applicant/Owner: Vijay Bashkar Kakubal State: WA Sampling Point: DP-1
Investigator(s): J. Sloan, S. Presster Section, Township, Range: S10, T23N, R5E
Landform (hillslope, terrace, etc): Depression Local relief (concave, convex, none): Concave Slope (%): <1%
Subregion (LRR): A Lat: - Long: - Datum: -
Soil Map Unit Name: Alderwood Gravelly Sandy Loam, 8 to 15 percent slopes NWI classification: None
Are climatic / hydrologic conditions on the site typical for this time of year? ☒ Yes ☐ No (If no, explain in remarks.)
Are Vegetation ☐, Soil ☐, or Hydrology ☐ significantly disturbed? Are “Normal Circumstances” present on the site? ☒ Yes ☐ No
Are Vegetation ☐, Soil ☐, or Hydrology ☐ naturally problematic? (If needed, explain any answers in Remarks.)
SUMMARY OF FINDINGS – Attach site map showing sampling point locations, transects, important features, etc.
Hydrophytic Vegetation Present? Yes ☒ No ☐
Is the Sampled Area
within a Wetland? Yes ☒ No ☐ Hydric Soils Present? Yes ☒ No ☐
Wetland Hydrology Present? Yes ☒ No ☐
Remarks: Wetland A in-pit.
VEGETATION – Use scientific names of plants.
Tree Stratum (Plot size: 5-m diameter)
Absolute
% Cover
Dominant
Species?
Indicator
Status
Dominance Test worksheet:
Number of Dominant Species
that are OBL, FACW, or FAC: 3 (A) 1. Alnus rubra 50 Y FAC
2. Total Number of Dominant
Species Across all Strata: 3 (B) 3.
4. Percent of Dominant Species
that are OBL, FACW, or FAC: 100% (A/B) 50 = Total Cover
Sapling/Shrub Stratum (Plot size: 3-m diameter) Prevalence Index worksheet:
1. Rubus spectabilis 20 Y FAC Total % Cover of: Multiply by:
2. OBL species 0 x 1 = 0
3. FACW species 115 x 2 = 230
4. FAC species 70 x 3 = 210
5. FACU species 0 x 4 = 0
20 = Total Cover UPL species 0 x 5 = 0
Herb Stratum (Plot size: 1-m diameter) Column Totals: 185 (A) 440 (B)
1. Phalaris arundinacea 100 Y FACW Prevalence Index = B/A = 2.4 2. Equisetum telmateia 15 N FACW
3. Hydrophytic Vegetation Indicators:
4. ☐ 1 – Rapid Test for Hydrophytic Vegetation
5. ☒ 2 – Dominance Test is > 50%
6. ☒ 3 – Prevalence Index is ≤ 3.01
7. ☐ 4 – Morphological Adaptations1 (Provide supporting
data in Remarks or on a separate sheet) 8.
9. ☐ 5 – Wetland Non-Vascular Plants1
10. ☐ Problematic Hydrophytic Vegetation1 (Explain)
11. 1Indicators of hydric soil and wetland hydrology must be
present, unless disturbed or problematic. 115 = Total Cover
Woody Vine Stratum (Plot size: 3-m diameter)
Hydrophytic
Vegetation
Present?
Yes ☒ No ☐
1.
2.
0 = Total Cover
% Bare Ground in Herb Stratum: 0
Remarks:
WETLAND DETERMINATION DATA FORM –
Western Mountains, Valleys, and Coast Region
US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0
SOIL Sampling Point: DP-1
HYDROLOGY
Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.)
Depth Matrix Redox Features
(inches) Color (moist) % Color (moist) % Type1 Loc2 Texture Remarks
0-11 10YR 2/1 100 Silt loam High in O.M.
11-16 10YR 2/1 91 7.5YR 2.5/3 7 C PL Silt loam High in O.M.
7.5YR 4/4 1 C M Silt loam
10YR 5/8 1 C M Silt loam
1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains. 2Loc: PL=Pore Lining, M=Matrix.
Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3:
☐ Histosol (A1) ☐ Sandy Redox (S5) ☐ 2cm Muck (A10)
☐ Histic Epipedon (A2) ☐ Stripped Matrix (S6) ☐ Red Parent Material (TF2)
☐ Black Histic (A3) ☐ Loamy Mucky Mineral (F1) (except MLRA 1) ☐ Very Shallow Dark Surface (TF12)
☒ Hydrogen Sulfide (A4) ☐ Loamy Gleyed Matrix (F2) ☐ Other (Explain in Remarks)
☐ Depleted Below Dark Surface (A11) ☐ Depleted Matrix (F3)
☐ Thick Dark Surface (A12) ☐ Redox Dark Surface (F6) 3 Indicators of hydrophytic vegetation and
wetland hydrology must be present, unless
disturbed or problematic.
☐ Sandy Mucky Mineral (S1) ☐ Depleted Dark Surface (F7)
☐ Sandy Gleyed Matrix (S4) ☐ Redox Depressions (F8)
Restrictive Layer (if present):
Hydric soil
present? Yes ☒ No ☐ Type:
Depth (inches):
Remarks:
Wetland Hydrology Indicators:
Primary Indicators (minimum of one required: check all that apply) Secondary Indicators (2 or more required)
☐ Surface water (A1) ☐ Water-Stained Leaves (except MLRA 1, 2, 4A
& 4B) (B9) ☐ Water-Stained Leaves (B9) (MLRA 1,
2, 4A & 4B) ☒ High Water Table (A2)
☒ Saturation (A3) ☐ Salt Crust (B11) ☐ Drainage Patterns (B10)
☐ Water Marks (B1) ☐ Aquatic Invertebrates (B13) ☐ Dry-Season Water Table (C2)
☐ Sediment Deposits (B2) ☒ Hydrogen Sulfide Odor (C1) ☐ Saturation Visible on Aerial Imagery (C9)
☐ Drift Deposits (B3) ☐ Oxidized Rhizospheres along Living Roots (C3) ☒ Geomorphic Position (D2)
☐ Algal Mat or Crust (B4) ☐ Presence of Reduced Iron (C4) ☐ Shallow Aquitard (D3)
☐ Iron Deposits (B5) ☐ Recent Iron Reduction in Tilled Soils (C6) ☒ FAC-Neutral Test (D5)
☐ Surface Soil Cracks (B6) ☐ Stunted or Stressed Plants (D1) (LRR A) ☐ Raised Ant Mounds (D6) (LRR A)
☐ Inundation Visible on Aerial Imagery (B7) ☐ Other (explain in remarks) ☐ Frost-Heave Hummocks
☐ Sparsely Vegetated Concave Surface (B8)
Field Observations:
Wetland Hydrology
Present? Yes ☒ No ☐
Surface Water Present? Yes ☐ No ☒ Depth (in): n/a
Water Table Present? Yes ☒ No ☐ Depth (in): 9”
Saturation Present? Yes ☒ No ☐ Depth (in): Surface
(includes capillary fringe)
Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available:
Remarks:
US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0
DP - 2
Project/Site: 980 Hoquim Avenue NE / Parcel #1023059060 City/County: Renton / King County Sampling date: 04-17-2020
Applicant/Owner: Vijay Bashkar Kakubal State: WA Sampling Point: DP-2
Investigator(s): J. Sloan, S. Presster Section, Township, Range: S10, T23N, R5E
Landform (hillslope, terrace, etc): Hillslope Local relief (concave, convex, none): None Slope (%): 3%
Subregion (LRR): A Lat: - Long: - Datum: -
Soil Map Unit Name: Alderwood Gravelly Sandy Loam, 8 to 15 percent slopes NWI classification: None
Are climatic / hydrologic conditions on the site typical for this time of year? ☒ Yes ☐ No (If no, explain in remarks.)
Are Vegetation ☐, Soil ☐, or Hydrology ☐ significantly disturbed? Are “Normal Circumstances” present on the site? ☒ Yes ☐ No
Are Vegetation ☐, Soil ☐, or Hydrology ☐ naturally problematic? (If needed, explain any answers in Remarks.)
SUMMARY OF FINDINGS – Attach site map showing sampling point locations, transects, important features, etc.
Hydrophytic Vegetation Present? Yes ☒ No ☐
Is the Sampled Area
within a Wetland? Yes ☐ No ☒ Hydric Soils Present? Yes ☐ No ☒
Wetland Hydrology Present? Yes ☒ No ☐
Remarks: Wetland A out-pit
VEGETATION – Use scientific names of plants.
Tree Stratum (Plot size: 5-m diameter)
Absolute
% Cover
Dominant
Species?
Indicator
Status
Dominance Test worksheet:
Number of Dominant Species
that are OBL, FACW, or FAC: 2 (A) 1.
2. Total Number of Dominant
Species Across all Strata: 2 (B) 3.
4. Percent of Dominant Species
that are OBL, FACW, or FAC: 100% (A/B) 0 = Total Cover
Sapling/Shrub Stratum (Plot size: 3-m diameter) Prevalence Index worksheet:
1. Rubus armeniacus 80 Y FAC Total % Cover of: Multiply by:
2. OBL species 0 x 1 = 0
3. FACW species 100 x 2 = 200
4. FAC species 80 x 3 = 240
5. FACU species 0 x 4 = 0
80 = Total Cover UPL species 0 x 5 = 0
Herb Stratum (Plot size: 1-m diameter) Column Totals: 180 (A) 440 (B)
1. Phalaris arundinacea 100 Y FACW Prevalence Index = B/A = 2.4 2.
3. Hydrophytic Vegetation Indicators:
4. ☐ 1 – Rapid Test for Hydrophytic Vegetation
5. ☒ 2 – Dominance Test is > 50%
6. ☒ 3 – Prevalence Index is ≤ 3.01
7. ☐ 4 – Morphological Adaptations1 (Provide supporting
data in Remarks or on a separate sheet) 8.
9. ☐ 5 – Wetland Non-Vascular Plants1
10. ☐ Problematic Hydrophytic Vegetation1 (Explain)
11. 1Indicators of hydric soil and wetland hydrology must be
present, unless disturbed or problematic. 100 = Total Cover
Woody Vine Stratum (Plot size: 3-m diameter)
Hydrophytic
Vegetation
Present?
Yes ☒ No ☐
1.
2.
0 = Total Cover
% Bare Ground in Herb Stratum: 0
Remarks:
WETLAND DETERMINATION DATA FORM –
Western Mountains, Valleys, and Coast Region
US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0
SOIL Sampling Point: DP-2
HYDROLOGY
Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.)
Depth Matrix Redox Features
(inches) Color (moist) % Color (moist) % Type1 Loc2 Texture Remarks
0-8 10YR 2/1 100 Silt loam
8-16 10YR 3/3 99 10YR 3/6 1 C M Sandy loam
1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains . 2Loc: PL=Pore Lining, M=Matrix.
Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3:
☐ Histosol (A1) ☐ Sandy Redox (S5) ☐ 2cm Muck (A10)
☐ Histic Epipedon (A2) ☐ Stripped Matrix (S6) ☐ Red Parent Material (TF2)
☐ Black Histic (A3) ☐ Loamy Mucky Mineral (F1) (except MLRA 1) ☐ Very Shallow Dark Surface (TF12)
☐ Hydrogen Sulfide (A4) ☐ Loamy Gleyed Matrix (F2) ☐ Other (Explain in Remarks)
☐ Depleted Below Dark Surface (A11) ☐ Depleted Matrix (F3)
☐ Thick Dark Surface (A12) ☐ Redox Dark Surface (F6) 3 Indicators of hydrophytic vegetation and
wetland hydrology must be present, unless
disturbed or problematic.
☐ Sandy Mucky Mineral (S1) ☐ Depleted Dark Surface (F7)
☐ Sandy Gleyed Matrix (S4) ☐ Redox Depressions (F8)
Restrictive Layer (if present):
Hydric soil
present? Yes ☐ No ☒ Type:
Depth (inches):
Remarks:
Wetland Hydrology Indicators:
Primary Indicators (minimum of one required: check all that apply) Secondary Indicators (2 or more required)
☐ Surface water (A1) ☐ Water-Stained Leaves (except MLRA 1, 2, 4A
& 4B) (B9) ☐ Water-Stained Leaves (B9) (MLRA 1,
2, 4A & 4B) ☐ High Water Table (A2)
☒ Saturation (A3) ☐ Salt Crust (B11) ☐ Drainage Patterns (B10)
☐ Water Marks (B1) ☐ Aquatic Invertebrates (B13) ☐ Dry-Season Water Table (C2)
☐ Sediment Deposits (B2) ☐ Hydrogen Sulfide Odor (C1) ☐ Saturation Visible on Aerial Imagery (C9)
☐ Drift Deposits (B3) ☐ Oxidized Rhizospheres along Living Roots (C3) ☐ Geomorphic Position (D2)
☐ Algal Mat or Crust (B4) ☐ Presence of Reduced Iron (C4) ☐ Shallow Aquitard (D3)
☐ Iron Deposits (B5) ☐ Recent Iron Reduction in Tilled Soils (C6) ☒ FAC-Neutral Test (D5)
☐ Surface Soil Cracks (B6) ☐ Stunted or Stressed Plants (D1) (LRR A) ☐ Raised Ant Mounds (D6) (LRR A)
☐ Inundation Visible on Aerial Imagery (B7) ☐ Other (explain in remarks) ☐ Frost-Heave Hummocks
☐ Sparsely Vegetated Concave Surface (B8)
Field Observations:
Wetland Hydrology
Present? Yes ☒ No ☐
Surface Water Present? Yes ☐ No ☒ Depth (in): n/a
Water Table Present? Yes ☐ No ☒ Depth (in): n/a
Saturation Present? Yes ☒ No ☐ Depth (in): 8”
(includes capillary fringe)
Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available:
Remarks: