HomeMy WebLinkAboutRS_Lew_Lake_Study_&_Revegetation_Plan_220531_v3
LAKE STUDY AND REVEGETATION PLAN
FOR
NISENNA RESIDENCE
CITY OF RENTON
Wetland Resources, Inc. Project #21372
Prepared By
Wetland Resources, Inc.
9505 19th Avenue SE, Suite 106
Everett, WA 98208
(425) 337-3174
Prepared For
Sin Lew
3909 Lake Washington Blvd N
Renton, WA 98056
Revision 2: May 31, 2022
ii
TABLE OF CONTENTS
1.0 PROPOSED PROJECT ...................................................................................................................1
1.1 PROJECT LOCATION .......................................................................................................................... 1
1.2 LANDSCAPE SETTING ......................................................................................................................... 1
1.3 SITE DESCRIPTION ............................................................................................................................. 2
1.4 PROJECT DESCRIPTION ...................................................................................................................... 4
2.0 LAKE STUDY ...............................................................................................................................4
2.1 ASSESSMENT METHODOLOGY .......................................................................................................... 4
2.2 SITE-SCALE LAKE ASSESSMENT ........................................................................................................ 4
2.3 NO NET LOSS OF SHORELINE FUNCTIONS DISCUSSION ................................................................. 7
3.0 REVEGETATION PLAN ................................................................................................................7
3.1 REVEGETATION PLAN SUMMARY ...................................................................................................... 7
3.2 REVEGETATION PLANT SCHEDULE ................................................................................................... 8
3.3 PLANT INSTALLATION NOTES ........................................................................................................... 8
4.0 PROJECT MONITORING PROGRAM ..........................................................................................11
4.1 MONITORING SCHEDULE ................................................................................................................ 11
4.2 PROJECT SUCCESS STANDARDS ...................................................................................................... 12
4.3 PROJECT GOALS, OBJECTIVES, AND PERFORMANCE STANDARDS ................................................ 12
4.4 MAINTENANCE AND CONTINGENCY PLANNING ............................................................................ 13
5.0 USE OF THIS REPORT ..............................................................................................................14
6.0 REFERENCES ............................................................................................................................15
LIST OF FIGURES
- AERIAL VIEW OF THE SUBJECT PROPERTY (NOT TO SCALE). ........................................1
- LANDSCAPE-SCALE VICINITY MAP (GOOGLE MAPS) ....................................................2
- BING MAPS BIRD’S EYE VIEW .......................................................................................3
- EXISTING SITE CONDITON. FACING SW TOWARDS LK WASHINGTON. .......................5
- EXISTING SITE CONDITON. FACING NE TOWARDS THE RESIDENCE. ...........................6
LIST OF APPENDICES
APPENDIX A: LAKE STUDY AND REVEGETATION PLAN MAPS
Nisenna Residence 1 Lake Study and Revegetation Plan
WRI #21372 Revision 2: May 31, 2022
1.0 PROPOSED PROJECT
1.1 PROJECT LOCATION
The project occurs on King County Tax Parcel 3342103895. This is a 0.87-acre parcel, located at
3101 Mountain View Avenue N in the City of Renton. Access to the property is from the east via
Mountain View Avenue N. The Public Land Survey System Locator is Section 31, Township 24N,
Range 5E, WM.
- Aerial view of the subject property (Not to Scale).
1.2 LANDSCAPE SETTING
Basin: Puget Sound
Sub-Basin: Water Resource Inventory Area (WRIA) 8 – Cedar River/Renton River
Watershed: Lake Washington Watershed
Nisenna Residence 2 Lake Study and Revegetation Plan
WRI #21372 Revision 2: May 31, 2022
- Landscape-Scale Vicinity Map (Google Maps)
The study area is located on the east shore of Lake Washington, the second-largest natural lake in
Washington State with a total surface area of over 22,000 acres. The lake is approximately 20 miles
in total length, with an average width of 1.5 miles (Kerwin, 2001). Lake Washington is highly
developed along much of the approximately 50 miles of lake shoreline.
1.3 SITE DESCRIPTION
The subject property is immediately surrounded to the north and south by residential
development, to the east by Mountain View Avenue N and to the west by Lake Washington. An
existing house, detached garage, driveway, and deck cover the majority of the property. Between
Nisenna Residence 3 Lake Study and Revegetation Plan
WRI #21372 Revision 2: May 31, 2022
the house and the shoreline of the lake, the backyard consists of maintained lawn and a few
ornamental shrubs.
Existing development along the lake’s shoreline is limited to the existing bulkhead and rockery.
The face of the bulkhead clearly defines the ordinary high water mark (OHWM) of Lake
Washington. No vegetation is present waterward of the OHWM and no aquatic vegetation or lake-
fringe wetlands were observed. Beach substrate consists of sorted sand and large cobble pieces on
a moderate grade. This is consistent with a high-energy shoreline. No other habitat features were
observed on or in the vicinity of the subject property.
- Bing Maps Bird’s Eye View
Nisenna Residence 4 Lake Study and Revegetation Plan
WRI #21372 Revision 2: May 31, 2022
1.4 PROJECT DESCRIPTION
The applicant proposes to remodel the existing residence, construct a second story over the existing
garage, and expand the back door deck. New impervious surfaces are proposed but do not exceed
the allowed maximum of 50% (RMC 4-3-090D.7.a.11). The ground footprint of the existing
residence will not be changed and will be no closer to the shoreline. The back door deck will expand
south and no closer to the shoreline. The proposed addition area is between the existing residence
and garage, which currently consists of a few ornamental shrubs.
A portion of the existing residential development is considered nonconforming because it is in the
50-foot vegetation conservation buffer and 15-foot building setback. RMC 4-10-095 regulates
nonconforming uses and allows the applicant’s proposed development as a “moderate alteration”
because the expansion occurs in the 15-foot building setback. This project meets the “80%
revegetation between an existing building and the water’s edge” standard of RMC 4-10-095F.2.
See section below titled Revegetation Plan.
Given that all components of the proposed project will be outside the shoreline buffer (50 feet), the
majority of work will be landward of the existing primary structure, and because the applicant has
provided a significant native revegetation plan, no net loss of shoreline ecological function will
occur.
The City of Renton’s Shoreline Master Program (SMP) requires applicants proposing shoreline
modifications on existing legal lots to provide a Stream or Lake Study that meets the requirements
of RMC 4-8-120D.19. This study was designed to meet that requirement.
2.0 LAKE STUDY
2.1 ASSESSMENT METHODOLOGY
Field Investigation
Senior Ecologist, Niels Pedersen, PWS, conducted a site investigation on January 6, 2022.
Limit of Study
The proposed project occurs on tax parcel (tax ID number 3342103895). Lack of legal access to
adjacent parcels prevents Wetland Resources, Inc. (WRI) staff from performing detailed
investigation in surrounding areas. Therefore, this investigation involved a site visit to the subject
property and evaluation of existing on-line information, include the USFWS National Wetlands
Inventory (NWI), USDA/NRCS Web Soil Survey, WDFW SalmonScape Interactive Map,
WDFW Priority Habitat and Species (PHS) Interactive Map, and King County iMap.
2.2 SITE-SCALE LAKE ASSESSMENT
Lake Washington, a Type S water, is the only aquatic critical area located on and near the subject
property. The western portion of the property includes a concrete bulkhead, with a rockery above,
along Lake Washington. The majority of vegetation in the western portion of the property consists
Nisenna Residence 5 Lake Study and Revegetation Plan
WRI #21372 Revision 2: May 31, 2022
of maintained lawn and ornamental shrubs. Additional ornamental plantings border the southern
and eastern sides of the residence. A few significant trees are located along the southern property
boundary. The remaining portions of the property consist of impervious surfaces which include
the single-family residence, garage, concrete and gravel walkways, and access driveway.
- Existing site conditon. Facing SW towards Lk Washington.
Existing Shoreline Ecological Functions
The rock bulkhead deflects wave energy, which can cause erosion that leads to deeper water along
the shoreline. High-energy/deepwater shorelines do not provide refuge opportunities for migrating
fish. Bulkheads also prevent the establishment of riparian vegetation, which provides cover and
forage opportunities for juvenile salmon. The absence of overhanging vegetation limits the
ecological value for migrating fish. The existing impervious surface also limits the establishment of
native vegetation, reducing the overall ecological value of this shoreline.
Due to the mostly high-energy shoreline, lack of riparian vegetation, and presence of impervious
surface within the shoreline buffer, shoreline ecological functions are limited within the subject
property.
Nisenna Residence 6 Lake Study and Revegetation Plan
WRI #21372 Revision 2: May 31, 2022
- Existing site conditon. Facing NE towards the residence.
Fish and Wildlife Presence
No fish or wildlife species were directly observed during the site investigation. The Washington
Department of Fish and Wildlife (WDFW), Pacific States Marine Fisheries Commission (PSMFC),
and the Washington Dept. of Natural Resources (WADNR) are the primary agencies that provide
publicly available information used for making fish presence determinations consistent with the
water typing rules set forth in WAC 222-16-030. The following information represents the findings
from each source.
WDFW SalmonScape Map Tool
SalmonScape is an online GIS database that contains publicly available resource information for
fish population studies and general species distribution (both documented and modeled presence).
Within Lake Washington, the following species are depicted:
• Fall Chinook (documented presence),
• Coho (documented presence),
• Winter Steelhead (documented presence),
• Sockeye (documented presence),
• Bull Trout (documented rearing),
• Kokanee (documented presence)
Nisenna Residence 7 Lake Study and Revegetation Plan
WRI #21372 Revision 2: May 31, 2022
PSMFC StreamNet Map Tool
StreamNet is a fish distribution database maintained by the PSMFC as a regional clearinghouse
for fish data. In the vicinity of the project area, fish presence is only depicted within Lake
Washington. StreamNet states the presence of the following species:
• Fall Chinook (migration only)
• Coho (migration only)
• Sockeye (migration only)
• Winter Steelhead (migration only)
• Bull Trout (migration only)
WDNR Forest Practices Activity Mapping Tool (FPAMT)
FPAMT is an online GIS database that aids the process of submitting a Forest Practices permit
application. The tool is useful for the purposes of this study because WDNR models fish presence.
FPAMT depicts Lake Washington as a fish-bearing shoreline of the state. No other features are
noted in the vicinity of the project.
WDFW Priority Habitat and Species (PHS) Maps
No terrestrial priority habitats are listed on or near the site. Aquatic priority habitats for the above-
listed species are noted on the PHS maps.
2.3 NO NET LOSS OF SHORELINE FUNCTIONS DISCUSSION
The existing development along the shoreline provides limited ecological value due to its developed
and maintained condition. Given the location of the improvements outside the shoreline buffer
and adjacent to existing residential structures, construction is not expected to cause any temporary
or permanent impacts to the existing ecological function of the lake. Given the lack of existing
shoreline functions, the isolated location of the improvement, and the applicant’s revegetation
plan, no net loss of shoreline ecological function is expected.
3.0 REVEGETATION PLAN
3.1 REVEGETATION PLAN SUMMARY
Due to proposed re-development in the 15-foot building setback, 80% of the area between the
existing building and the water’s edge is required to be revegetated pursuant to RMC 4-10-095F.2.
The proposed planting plan will increase diversity and density of native plants near the shoreline
of Lake Washington, which will improve wildlife habitat. Relative to proposed site development,
this planting plan will result in a significant uplift in shoreline ecological functions.
Nisenna Residence 8 Lake Study and Revegetation Plan
WRI #21372 Revision 2: May 31, 2022
3.2 REVEGETATION PLANT SCHEDULE
Shoreline Revegetation Plan (924 square feet)
Common Name Latin Name Size Quantity
shore pine Pinus contorta 1 gallon 1
Pacific dogwood Cornus nuttallii 1 gallon 1
mock orange Philadelphus lewisii 1 gallon 3
red flowering currant Ribes sanguineum 1 gallon 2
goat’s beard Aruncus dioicus 1 gallon 3
bush cinquefoil Potentilla fruticosa 1 gallon 3
salal Gaultheria shallon 1 gallon 5
beach strawberry Fragaria chiloensis 4” pot 48
kinnikinnick Arctostaphylos uva-ursi 4” pot 51
3.3 PLANT INSTALLATION NOTES
Installation Timing
All planting shall occur between November 1 and March 1. Plants installed earlier in the dormant
period have more time to adapt to the site and extend their root systems before the water demands
of spring and summer. Receipts for installation materials shall be made available to the City as
requested. The origin of all plant materials specified in this plan shall be native plants, nursery
grown in the Puget Sound region of Washington. Some limited species substitution may be
allowed, only with the agreement of the project biologist.
Pre-Planting Meeting
Prior to installation of the above plants, a site meeting shall occur to resolve any questions that may
arise. The meeting should be attended by the property owner, project biologist, and installer. The
objective will be to discuss site preparation, planting location, and to assess plant stock.
Site Inspection
The project biologist shall be contracted to periodically inspect the planting area described in this
plan. Minor adjustments to the original design may be necessary prior to and during construction
due to unusual or hidden site conditions. A City representative and/or the consulting professional
will make these decisions during construction. Any deviations from the approved plan shall be
noted in the project as-built report.
Weeding
Existing and exotic vegetation in the planting area will be removed by hand at the time of
installation and on a routine basis throughout the monitoring period. No chemical control of
vegetation on any portion of the site is recommended.
Handling
Plants shall be handled so as to avoid all damage, including: breaking, bruising, root damage,
sunburn, drying, freezing or other injury. Plants must be covered during transport. Plants shall
not be bound with wire or rope in a manner that could damage branches. Protect plant roots with
shade and wet soil in the period between delivery and installation. Do not lift container stock by
Nisenna Residence 9 Lake Study and Revegetation Plan
WRI #21372 Revision 2: May 31, 2022
trunks, stems, or tops. Do not remove plants from containers until ready to plant. Water all plants
as necessary to keep moisture levels appropriate to the species horticultural requirements. Plants
shall not be allowed to dry out. All plants shall be watered thoroughly immediately upon
installation. Soak all containerized plants thoroughly prior to installation.
Storage
Plants stored for longer than one month prior to planting shall be planted in nursery rows and
treated in a manner suitable to those species’ horticultural requirements. Plants must be re-
inspected by the project biologist prior to installation.
Damaged plants
Damaged, dried out, or otherwise mishandled plants will be rejected at installation inspection. All
rejected plants shall be immediately removed from the site.
Plant Names
Plant names shall comply with those generally accepted in the native plant nursery trade. Any
question regarding plant species or variety shall be referred to the project biologist. All plant
materials shall be true to species and variety and legibly tagged.
Plant Stock Requirements
Plants shall be normal in pattern of growth, healthy, well-branched, vigorous, with well-developed
root systems, and free of pests and diseases. Damaged, diseased, pest-infested, scraped, bruised,
dried out, burned, broken, or defective plants will be rejected. Plants with pruning wounds over
1-inch in diameter will be rejected.
Roots
All plants shall be balled and burlapped (B &B) or containerized, unless explicitly authorized by
the project biologist. Rootbound plants or B&B plants with damaged, cracked, or loose rootballs
(major damage) will be rejected. Immediately before installation, plants with minor root damage
(some broken and/or twisted roots) must be root-pruned. Matted or circling roots of containerized
plantings must be pruned or straightened and the sides of the root ball must be roughened from
top to bottom to a depth of approximately half an inch in two to four places. Bare root plantings
of woody material are allowed only with permission from the project biologist and/or City staff.
Sizes
Plant sizes shall be the size indicated in the plant schedule. Larger stock may be acceptable
provided that it has not been cut back to the size specified, and that the root ball is proportionate
to the size of the plant. Smaller stock may be acceptable, and preferable under some circumstances,
based on site-specific conditions. Measurements, caliper, branching, and balling and burlapping
shall conform to the American Standard of Nursery Stock by the American Association of
Nurserymen (latest edition).
Form
Evergreen trees shall have single trunks and symmetrical, well-developed form. Deciduous trees
shall be single trunked unless specified as multi-stem in the plant schedule. Shrubs shall have
multiple stems and be well-branched.
Nisenna Residence 10 Lake Study and Revegetation Plan
WRI #21372 Revision 2: May 31, 2022
Site Conditions
The contractor shall immediately notify the project biologist of drainage or soil conditions likely to
be detrimental to the growth or survival of plants. Planting operations shall not be conducted
under the following conditions: freezing weather, when the ground is frozen, excessively wet
weather, excessively windy weather, or in excessive heat.
Planting Pits
Planting pits shall be circular or square with vertical sides and shall be 6” deeper and 12” larger in
diameter than the root ball of the plant. Break up the sides of the pit in compacted soils. Set plants
upright in pits. Burlap shall be removed from the planting pit. Backfill shall be worked back into
holes such that air pockets are removed without adversely compacting down soils.
Fertilizer
Slow-release fertilizer may be used if pre-approved by City of Renton staff. Fertilizers shall be
applied only at the base of plantings underneath the required covering of mulch (that does not
make contact with stems of the plants). No soil amendment or fertilizers will be placed in planting
holes.
Staking
Most shrubs and many trees DO NOT require any staking. Do not use a stake if the plant can
stand alone without staking in a moderate wind. If the plant needs support, strapping or webbing
should be used as low as possible on the trunk to loosely brace the tree with two stakes. Do not
brace the tree tightly or too high on the trunk. If the tree is unable to sway, it will further lose the
ability to support itself. Do not use wire in a rubber hose for strapping as it exerts too much pressure
on the bark. Remove the stakes as soon as supporting the plant becomes unnecessary. All stakes
must be removed within two (2) years of installation.
Plant Location
Colored ribbon or other appropriate marking shall be attached to the installed plants to assist in
locating the plants while removing the competing non-native vegetation and during the monitoring
period.
Arrangement and Spacing
The plants shall be arranged in a pattern with the appropriate numbers, sizes, species, and
distribution that are required in accordance with the approved plans. The actual placement of
individual plants is intended to mimic natural, asymmetric vegetation patterns found on similar
undisturbed sites in the area. Spacing of the plantings may be adjusted to maintain existing
vegetation with the agreement of the project biologist and/or City staff.
Inspection(s)
The project biologist shall be present to inspect the plants prior to planting. Minor adjustments to
the original design may be required prior to and during construction.
Woodchip Mulch
The planting area shall receive no less than 2 to 4 inches of certified woodchip mulch after planting,
except in the vicinity of proposed groundcover. A layer of woodchip mulch will be placed around
Nisenna Residence 11 Lake Study and Revegetation Plan
WRI #21372 Revision 2: May 31, 2022
the base of each plant in a 3-foot radius and at a depth of 2 to 4 inches. To avoid plant decay and
rot, woodchip mulch shall not be in contact with plant stems.
4.0 PROJECT MONITORING PROGRAM
4.1 MONITORING SCHEDULE
1. Initial compliance/as-built report
2. Semi-annual site inspection (in the spring and in the fall) for years 1-3
3. Annual site inspection (in the fall) for years 4-5
4. Annual reports including final report (one report submitted in the fall of each monitored year)
Purpose for Monitoring
The purpose for monitoring this project shall be to evaluate its success. Success will be determined
where monitoring reports show that the performance standards stated below are met in year five.
The property owners shall grant access to the planting area for inspection and maintenance to the
contracted landscaper, project biologist, and City staff during the monitoring period bond or until
the project is considered successful.
Monitoring Methodology
During the as-built site visit, at least four representative photopoints will be selected. Photos shall
be taken from the same location during each monitoring year to establish a record of plant growth
throughout the monitoring period. The location of permanent photopoints shall be depicted
graphically in the as-built report, and Year 0 photographs shall be included in the as-built letter.
To ensure successful establishment of new plants, vegetation sampling and definitions of success
will be based on a qualitative assessment of survivorship, invasive species cover, and total areal
cover. This is an appropriate methodology given the high probability of successful establishment
in a residential yard that will be regularly maintained by professional landscapers.
Survivorship shall be documented in each annual report. All dead plants shall be removed and
replaced with the same species unless an alternate species is recommended by the project biologist.
Maintenance shall occur immediately following any monitoring report documenting the presence
of invasive species.
Monitoring Report Contents
Annual monitoring reports shall be submitted by October 31 of each year during the monitoring
period. As applicable, monitoring reports must include descriptions / data for:
1. Site plan and vicinity map,
2. Historic description of project, including date of installation, current year of monitoring,
restatement of restoration goals and performance standards,
3. Plant survival for all installed plants,
4. Monitoring methodology in the context of assessing performance standards,
5. Assessment of nuisance / exotic biota and recommendations for management,
6. Color photographs taken from permanent photopoints.
Nisenna Residence 12 Lake Study and Revegetation Plan
WRI #21372 Revision 2: May 31, 2022
4.2 PROJECT SUCCESS STANDARDS
Upon installation of the proposed planting plan by the contracted landscaper, an inspection by the
project biologist will be made to document correct installation. A compliance letter will be supplied
to the City for review within 30 days after successful completion of planting. City review and
acceptance of the as-built letter is required prior to commencement of the five-year monitoring
period.
The project biologist will perform biannual monitoring of the plantings (in the spring and fall) for
the first three years, and annual monitoring (in the fall) for years four and five. A written report
describing the monitoring results will be submitted to the City after the fall site inspection of each
monitored year. Final inspection will occur five years after completion of this project unless
performance standards are not met in year five. The project biologist will prepare a final report
after all performance standards have been met. If the project does not meet the performance
standards below in year five, annual monitoring and maintenance shall continue until the project
meets all performance standards.
4.3 PROJECT GOALS, OBJECTIVES, AND PERFORMANCE STANDARDS
Environmental goals, objectives, and performance standards have been established to provide an
objective measure of success for this project.
The primary environmental goal for this project is to improve in-water habitat conditions for
aquatic species. To achieve this goal, the primary objective is to install native vegetation along the
OHWM that can provide future sources of woody debris, and to create conditions that will increase
diffuse over-water shade. A secondary environmental goal is to improve forage habitat for avian
species. To achieve this goal, diverse native species that provide habitat value will be installed
within the VEA. The following Performance Standards shall be the basis for determining project
success.
Year 1 Performance Standards
100 percent survival of installed native species
No coverage by invasive species
Year 3 Performance Standards
90 percent survival of installed native species
No coverage by invasive species
New growth shall be observable and documented (relative to year 1)
>40% Areal Cover
Year 5 Performance Standards
90 percent survival of installed native species
No coverage by invasive species
>60% Areal Cover
New growth shall be observable and documented (relative to year 3)
Nisenna Residence 13 Lake Study and Revegetation Plan
WRI #21372 Revision 2: May 31, 2022
4.4 MAINTENANCE AND CONTINGENCY PLANNING
Maintenance Plan
This revegetation project may require replacement of installed species that have died. Maintenance
is also necessary to control invasive, non-native plant species and competing grasses. The planting
areas shall be maintained in the spring of each year of the monitoring period, and again in the fall
if recommended by the project biologist. Maintenance will include hand removal of competing
grasses and non-native vegetation from a two-foot-diameter ring surrounding all installed plants.
Removal of invasive species shall be done by hand to decrease the likelihood of damage occurring
to the plantings. All blackberry, Japanese knotweed, scotch broom, reed canarygrass, and other
aggressive invasive species sprouting anywhere on-site within twenty feet of the planting area shall
be removed during each maintenance period. Invasive species removal shall follow guidance
outlined by the King County Noxious Weed Control Program. Herbicide use is prohibited.
Following each monitoring site visit, recommendations will be made for replacement of dead plants
and other general maintenance. All maintenance recommendations related to invasive cover shall
be addressed within 45 days of the date written on the annual report requiring action, and the City
shall be supplied with a follow-up letter documenting how these recommendations were addressed.
If necessary, re-planting shall occur in the late fall. A brief memo will be drafted and submitted to
the City indicating that re-planting efforts were successful.
Contingency Plan
If more than 20% of installed plants are severely stressed during any of inspection, additional
plantings of the same or alternative species may be added to the planting area. A meeting with the
project biologist and the property owner will be scheduled to decide upon contingency plans if this
situation persists into the next inspection. Elements of the contingency plan may include more
aggressive weed control, plant mortality replacement, re-location, species substitution, fertilization,
and/or soil amendments.
Nisenna Residence 14 Lake Study and Revegetation Plan
WRI #21372 Revision 2: May 31, 2022
5.0 USE OF THIS REPORT
This Lake Study and Revegetation Plan is supplied to Sin Lew as a means of demonstrating RMC
compliance as required by the City of Renton during the permitting process. This report is based
largely on readily observable conditions and, to a lesser extent, on readily ascertainable conditions.
No attempt has been made to determine hidden or concealed conditions.
The laws applicable to salmonid habitat are subject to varying interpretations and may be changed
at any time by the courts or legislative bodies. This report is intended to provide information
deemed relevant in the applicant's attempt to comply with the laws now in effect.
The work for this report has conformed to the standard of care employed by ecologists. No other
representation or warranty is made concerning the work or this report and any implied
representation or warranty is disclaimed.
Wetland Resources, Inc.
Alia Richardson
Associate Ecologist & Wildlife Biologist
Nisenna Residence 15 Lake Study and Revegetation Plan
WRI #21372 Revision 2: May 31, 2022
6.0 REFERENCES
Anderson et al. 2016. Determining the Ordinary High Water Mark for Shoreline Management Act Compliance
in Washington State. WA Department of Ecology. Publication #16-06-029.
Kerwin, J. 2001. Salmon and Steelhead Habitat Limiting Factors Report for the Cedar – Renton Basin (Water
Resource Inventory Area 8). Washington Conservation Commission. Olympia, WA.
http://www.pugetsoundnearshore.org/supporting_documents/WRIA_8_LFR_FINAL.p
df. Accessed January 2022.
NOAA. 2022. National Weather Service Forecast Office, Seattle, Washington.
http://www.weather.gov/climate/index.php?wfo=sew. Accessed January 2022.
StreamNet. 2022. StreamNet Mapper. http://www.streamnet.org/mapping_apps.cfm. Accessed
January 2022.
U.S. Fish & Wildlife Service (USFWS). 2022. National Wetlands Inventory (NWI) Online Mapper.
http://www.fws.gov/wetlands/Data/Mapper.html. Accessed January 2022.
Washington State Department of Fish and Wildlife (WDFW).2022a. Priority Habitats and Species:
PHS on the Web. http://wdfw.wa.gov/mapping/phs/. Accessed January 2022.
WDFW. 2022b. SalmonScape Online Mapping Application.
http://apps.wdfw.wa.gov/salmonscape/map.html. Accessed January 2022.
APPENDIX A:
LAKE STUDY AND REVEGETATION PLAN MAPS
LAKE STUDY AND REVEGETATION PLAN MAPS
NISENNA RESIDENCE
SITE PLAN AND PROJECT IMPACTS
Delineation / Mitigation / Restoration / Habitat Creation / Permit Assistance
9505 19th Avenue S.E. Suite 106 Everett,Washington 98208
Phone: (425) 337-3174
Fax: (425) 337-3045
Email: mailbox@wetlandresources.com
Date: 5/31/2022
Nisenna Residence
Site Plan and Project Impacts
Lake Study and Mitigation Plan Maps
Drawn by: NP
Project # 21372
Sheet 1/2Sin Lew
3909 Lake WA Blvd Ln
Renton, WA 98056 MOUNTAIN VIEW DR(SITE ACCESS)LEGEND
Scale 1" = 20'
2010 30 400
ORDINARY HIGH WATER MARK (OHWM)
LAKE WASHINGTON
TYPE S
15' BUILDING SETBACK PROPOSED
ALTERATION
EXISTING CONCRETE
EXISTING GRAVEL
EX. SFR
EX. GARAGE
EX. GRAVEL DRIVEWAY
EX. CONCRETE WALKWAY
EX. GRAVEL
WALKWAY
EX. 2ND FLOOR DECK
PROPOSED
ADDITION
22 SF
PROPOSED
DECK
60 SF
OHWM OF
LAKE WASHINGTON
34'
6.5'15'15'3'
6.5'15'34'15'3'18'18'4'
4'
30'
30'25'25'12'5'VEGETATION CONSERVATION BUFFER
PARCEL #3342103895
PARCEL #3342103890
5
0'
18'
EX. ROCKERY
PROPOSED
ADDITION
236 SF
EXISTING FOUNDATION
PROPOSED
SETBACK
INTRUSION
121 SF
EX. CONCRETE SLAB
PROPOSED SETBACK
INTRUSION
1
5'
15' BUILDING
SETBACK
50' VEGETATION
CONSERVATION BUFFER
Common Name Latin Name Size Quantity
shore pine Pinus contorta 1 gallon 1
Pacific dogwood Cornus nuttallii 1 gallon 1
mock orange Philadelphus lewisii 1 gallon 3
red flowering currant Ribes sanguineum 1 gallon 2
goat’s beard Aruncus dioicus 1 gallon 3
bush cinquefoil Potentilla fruticosa 1 gallon 3
salal Gaultheria shallon 1 gallon 5
beach strawberry Fragaria chiloensis 4” pot 48
kinnikinnick Arctostaphylos uva-ursi 4” pot 51
LAKE STUDY AND REVEGETATION PLAN MAPS
NISENNA RESIDENCE
VEGETATION CONSERVATION BUFFER REVEGETATION PLAN
Delineation / Mitigation / Restoration / Habitat Creation / Permit Assistance
9505 19th Avenue S.E. Suite 106 Everett,Washington 98208
Phone: (425) 337-3174
Fax: (425) 337-3045
Email: mailbox@wetlandresources.com
Date: 5/31/2022
Nisenna Residence
Revegetation Plan
Lake Study and Mitigation Plan Maps
Drawn by: NP
Project # 21372
Sheet 2/2Sin Lew
3909 Lake WA Blvd Ln
Renton, WA 98056
LAKE WASHINGTON
TYPE S
SFR
GARAGE
GRAVEL DRIVEWAY
LAKE WA OHWM
5
0'
ROCKERY
1
5'
15' BUILDING
SETBACK
80% REVEGETATION AREA
50' VEGETATION
CONSERVATION BUFFER
AREA BETWEEN
EXISTING BUILDING
AND WATER'S EDGE
MODERATE ALTERATION COMPLIANCE SUMMARY
TOTAL AREA BETWEEN
EXISTING BUILDING
AND WATER'S EDGE
PROPOSED
REVEGETATION AREA
1,154 SF 924 SF
Scale 1" = 20'
2010 30 400
INSET 1
Inset Scale 1" = 10'
105 15 200
INSET 1
OHWM
ROCKERY
GRAVEL
MAP LEGEND
OHWM
15' BUILDING
SETBACK
AREA BETWEEN BUILDING
AND WATER'S EDGE
CONCRETE
FOUNDATION WALL 80% REVEGETATION
AREA
VEGETATION
CONSERVATION BUFFER
REVEGETATION PLANTING PLAN (924 SF)
PACIFIC
DOGWOOD
SHORE
PINE
GOAT'S
BEARD
MOCK
ORANGE
SALAL
BEACH
STRAWBERRY
KINNIKINNICK
OREGON
GRAPE
RED
FLOWERING
CURRANT
PLANT LEGEND
PACIFIC
DOGWOOD
SHORE
PINE
GOAT'S
BEARD
MOCK
ORANGE
SALAL
BEACH
STRAWBERRY
KINNIKINNICK
BUSH
CINQUEFOIL
RED
FLOWERING
CURRANT
PLANT LEGEND