HomeMy WebLinkAboutHabitat Management Plan 802261001
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WESTECH COMPANY
Environmental Consulting - Site Permitting
REVISED MITIGATION AND HABITAT MANAGEMENT PLAN
ASSESSOR'S PARCEL #802261001
893 SNOW CREEK ROAD
JEFFERSON COUNTY, WASHINGTON
June 2007
RECEIVED
"JU\l15 .7
jtUERSUN tU"NTI utU
G. Bradford Shea, Ph.D.
Kim Loafman
Submitted to:
JEFFERSON COUNTY
DEPARTMENT OF COMMUNITY DEVELOPMENT
1820 Jefferson Street
Port Townsend, Washington 98368
Submitted by:
WESTECH COMPANY
P.O. Box 2876
Port Angeles, Washington 98362
P.O. Box 2876 - Port Angeles, Washington 98362 - Telephone: (360) 565-1333 - Fax: (360) 452-6708
email: westech@westechcompany.com
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REVISED MITIGATION AND HABITAT MANAGEMENT PLAN
ASSESSOR'S PARCEL #802261001
893 SNOW CREEK ROAD
JEFFERSON COUNTY, WASHINGTON
June 2007
G. Bradford Shea, Ph.D.
Kim Loafman
Submitted to:
JEFFERSON COUNTY
DEPARTMENT OF COMMUNITY DEVELOPMENT
1820 Jefferson Street
Port Townsend, Washington 98368
Submitted by:
WESTECH COMPANY
P.O. Box 2876
Port Angeles, Washington 98362
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CONTENTS
CHAPTER/SECTION PAGE NO.
1.0 INTRODUCTION 1
2.0 APPROACH AND METHODS 5
2.1 Approach 5
2.2 lVIeffl6ds 5
3.0 PROJECT SITE 6
3.1 E~i~tirg Conditions 6
3.2 VE:!getation 6
3.3 SOils 8
3.4 Hydrology 8
4.0 MITIGATION PLAN 9
4.1 R~gLJlat()rySefting 9
4.2 Project and Dis.turbance Impacts 9
4.3 Plah Components 10
4.4 Detailed Mitigation Measures 10
4.5 Irnplel1lantationand Timing 11
4.6 lVIitigation and Restoration Monitoring 11
4.7 Contingency Plan 12
5.0 HABITAT MANAGEMENT PLAN 13
6.0 CONCLUSIONS AND RECOMMENDATIONS 17
6.1 Conclusions 17
6.2 Recommendations 17
7.0 REFERENCES 18
TABLES
Table 1. List of Native Plants for Buffer Mitigation and Enhancement 16
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CONTENTS
CHAPTER/SECTION
PAGE NO.
FIGURES
Figure 1. L()cation Map
Figure 2. VidnityMap
Figure 3. Parcel Map
Figure 4. Site Map (Eastern Portion of Property)
Figure 5. Site Map Showing Planting Areas (Eastern Portion
of Property)
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3
4
7
15
APPENDICES
Appenqix A - S.ite. Photographs
Appendix 8 - Habitat Map
A-1
8-1
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1.0 INTRODUCTION
The Property (Site) described as Parcel #802261001 is located at 893 Snow Creek Road
in Jefferson County, Washington. The Site lies in the NE quarter of Section 26, Township
28 North, Range 2 West, W. M. (Figures 1, 2, and 3) and is approximately 12 acres in
size. Lake Leland. borders the east ~ide of the Property. Dr. Ronald Reinhart, the owner
of the Property, intends to build a single-family residence, a barn, and RV pad in the
northeast portion of the Property.
The landowner contracted with Westech Company to determine if Environmentally
Sensitive Areas. on the Site would ... iihterfere .. with the.. area . prQPo~ed for. d.evelopment.
Wetlands were delineClted.and classifiecfCl9cordingtotype. Additionally, .a~sociated buffer
zpnes were marked in the .field. AVYetl~nd pelineation Report, dated j\pril 2006, was
prepared by Westech Company (Westech 2006) and. submitted to Jefferson County for
review.
f\t tr~ time. of sUbmi~si9n,it was.9~t~rrrtin~Q thatthe. Site corl~in~cftvvoq~t~gOry III
wetlands and a Type 4 stream. In order to allow more room for building purposes, Buffer
Averaging was re.commended along .the stream. A 25 percentburrer reduction\Nould be
ne~ded on the north side of the stream with a compensatory addition to the buffer along a
different stretch of the stream.
In a letter dated August 30, 2006, from Jefferson County's Department of Community
Development in response to a review of the Septic Permit Application submitted by Dr.
Reinhart, it was stated that a Mitigation and Habitat Management Plan must be submitted
to Jefferson County in order to approve a buffer reduction. This letter also states that liThe
Department of Natural Resources and the Washington Department of Fish and Wildlife
determined that the stream on this parcel is a Type 3 stream (not Type 4 as indicated on
GIS mapping). The buffer for a Type 3 stream is 100 feet (same as a Type 4 stream)."
Despite this discrepancy in the stream typing, the landowner still requests approval for the
same Buffer Averaging plan as outlined in the Wetland Delineation Report (Westech
2006). To that end, Dr. Reinhart has contracted with Westech Company to complete a
Mitigation and Habitat Management Plan.
This report summarizes field data from the Wetland Delineation conducted on the Site and
constitutes a combined Mitigation and Habitat Management Plan outlining the impacts of
any land use activities associated with development of the parcel and prescribes proposed
Mitigation Measures to restore and enhance the property. This document is intended to
satisfy the requirements of Jefferson County Unified Development Code18.15.340.
Following a letter dated March 26, 2007, from Jefferson County's Department of
Community Development regarding the application for this development, Westech
Company has revised this Mitigation and Habitat Management Plan to address
concerns made by Donna Frostholm, Jefferson County's Staff Wetland Biologist.
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2.0 APPROACH AND METHODS
2.1 Approach
The approach for this investigation into the potential impacts of development of this Site
included extensive review of Environmentally Sensitive Area maps, aerial photos, county
habitat maps, and topographic maps of the area. Also reviewed was the Wetland
Delineation Report d~t:d April 4906 e.~ep~red by We~t~ch 9()rnP;any. .. The. On-site
Wastewater Plan prepared by Soils Application, Inc. (dated January 10, 2007) was
reviewed prior to revisions of this Miti~ation and Habitat Management Plan as it was
unavailable to Westech staff during the original drafting of the report.
Initial field investigations forthe Wetland Delineation were carried out by Dr. G. Bradford
Shea and Mr. James~cDou~?l1l during November and December 2005 with additional
fieldwork during Febr~ary2?06. . .~t this. time, the ProP:rtyw~Sinse~cted,Jelevant
measLJrements w:retf~en. for m;appin~.purp()ses,. yeget;ati()nVII.~si9:Qtin:.d, ph()togrfphic
documentation. .Vllas .f~uired,.. andland~sefctiviti~s and S.ite.. cD;af;apteristics were noted.
Additional fieldwork was carried out during the summer and fall of 2006.
2.2 Methods
Westech's field investigation involved examining the existing conditions found on the
Property. This included reviewing the area proposed for development in relation to the
natural features and existing structures already found on-site. This Mitigation and Habitat
Management Plan has been formulated to address habitat issues and the potential
impacts of building close to Environmentally Sensitive Areas, and has also been prepared
to justify Buffer Width Averaging. Wetland Mitigation Measures have been developed to
offset impacts to wetlands and their associated buffer zones, and to restore and enhance
the integrity of the Site. Mitigation Measures will improve habitat through erosion control,
non-native vegetation (invasive species) removal, and planting of additional native
vegetation.
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3.0 PROJECT SITE
3.1 Existing Conditions
The Site is adjacent to the northwestern shoreline of Lake Leland. Elevation is roughly
150 feet above mean sea level (msl). The 12 acre Site is divided into three distinct areas
by roads passing through the Parcel. (Figure 3). The smaller~nd westernmost two areas
are heavily forested. The easternmost area has a small existing building (a one room
dVJelling)~nd a. Srnall~helt~r~uilfry~~r th~If:l~E3(Fi~~re4).Als()I()~t~(j ()n.mE3et:ist side of
the property is a small boat dock. An existing gravel access driveway enters the
easternmost portion of the parcel frbm the west with the southern fork going to the existing
building and the northern fork of the driveway providing access via a bridge over the
stream to the proposed hblTle-site.
There are three Environmentally Sensitive Areas on the Site as shown in Figure 4 which
depicts only the eastern portion of the Site. The wetland found in the southeast area of the
Site is labeled as Wetland A and can be categorized as an emergent lake-fringe wetland.
This wetland has been classified as a Category III wetland and parallels the lakeshore on
the southeastern portion of the Site. The width of Wetland A ranges from 15-25 feet.
Another Category III emergent lake-fringe wetland (Wetland B) was found in the
northeastern portion of the Site. This wetland is heavily forested with red alder and
Western red cedar dominating the canopy. A diverse shrub and herbaceous layer can be
found that consists of piggy-back plant and salmonberry. The width of Wetland B varies
from 25-60 feet.
A Type 3 stream flows in an easterly direction through the Property and empties into Lake
Leland. Approximately 210 feet of the stream bank has been deforested in the
northeastern portion of the property. Mowed grass and a few hydrophytic plants border
the stream in this area.
3.2 Vegetation
Forest covers the majority of the property, with the exception of the northeastern portion of
the parcel which includes a mowed grassy area on both sides of the stream. The Site
vegetation is composed of typical Pacific Northwest forest vegetation with large conifers
and shrubs, including Western red cedar, Douglas fir, red alder, oceanspray and sword
fern. Also included are areas of lake-fringe vegetation which consists of hydrophytic plants
and shrubs such as sedges and salmonberry. Wooded wetland areas consist of red alder,
salmonberry, and piggy-back plant.
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Forested
Area
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Proposed
Barn
Proposed
RV Pad
,
,
" 125'
Forested /\ Buffer
Area 125' \ Zone
Buffer \. I
Zone ~
'/
.
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Lake
Leland
Forested
Area
Wetland
Boundary
Approx.
Wetland
Boundary> . .
.
/
.
.
Lake
Leland
/
.
..........
Wetland Boundary
Approx. Wetland Boundary
Forest Area Boundary
Buffer Zones
Stream
Driveway
Figure 4. Site Map (Eastern Portion of Property)
I Westech Company 2006
Approximate Scale - 1 inch = 100 feet Source: Westech Company 2006
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3.3 Soils
The Site has nearly level soils, with the exception of the northwest side of the property
which is fairly steep. Soils on the Site are of the Alderwood soil series (SCS 1975). These
are generally moderately well drained and usually have a cemented layer 20-40 inches
below the surface. This causes slow permeability and can cause surface water to appear
in depressed areas. These soils were formed in glacial till. The surface layer is typically a
very dark grayish brown, turning to a dark yellowish brown below this to a depth of 12
inches. Textures range from a gravelly fine sandy loam to a gravelly Sandy loam.
The specific soil types at the Site are:
1) Alderwood gravelly loams (AI-C) found on 0-15% slopes. These gravelly
sandy Iparns.. hav~ ~~ndy, very gravelly, or cobbly sub-s9ils and are
moderately well drain:~. Runoff is slow to mediUm and the hc:tzard of water
er9si9n is sli~ht to mo~~r~te.. Due to the compact glacial till, water has a
tendency to pool up in depressed areas.
2) I\lderwood gravelly loams (AI-D). These soils are found on 15-30% slopes.
This soil type hasthe same general soil texture and layers as AI-C. The
hazard of water erosion is moderate to severe and runoff is medium to rapid.
The soils on the Site that have 15%+ slopes are well vegetated with native species and it
appears that water erosion or landsliides have not occurred in recent years since trees
which are at least 70 years old are present on those slopes.
3.4 Hydrology
Hydrology of the Site includes a Type 3 stream that flows in an easterly direction through
the property before draining into Lake Leland. The stream has a channel which fluctuates
between 2-5 feet in width and stream-banks 4-6 feet in height. This stream has very low
flow in times of low rainfall, but judging from the width and depth of the stream channel, it
appears that this stream will have substantially higher flows during periods of heavy
precipitation.
Wetland A is classified as an emergent lake-fringe wetland and follows the contour of the
lake. At one point near the existing building, Wetland A widens out, creating an area that
is dominated by reed canary grass. Wetland B occupies an area near the proposed
home-site and north of the stream (Figure 4). This is a forested lake-fringe wetland.
Hydrology of both wetlands is driven by water seepage along the top of the glacial till layer,
coupled with some lake water in the root zone along the shoreline.
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4.0 MITIGATION PLAN
4.1 Regulatory Setting
This Report is intended to satisfy the requirements of Jefferson County Unified
Development Code18.15.340 which mandates that a Mitigation and Habitat Management
Plan be prepared and submitted to Jefferson County in order to approve a Buffer
Averaging Planwhich would allow more space for on-site development.
According to Jefferson COU.ho/database habitat maps, the Site is within 0.5 mile of a
known bald ~agle nest (~ppendi~ B). Bl:dd eagles are protected by both state and
federal law and are curre~tlylistEed as thre.atened .. under the .Fed:ral Eflq~ngered
Species Act. Th: BaldE~91: Pr9tection. Rules (yVAC 232-1?-292) ~ere (i!stablished
during .19.869}, the\N~shin9ton 9tatEeVVild.life Commission. .A.s per WAC 232-12-292,
VV~shington DEepartrn.ent ofFi13h.a~(fvvildlif~ (yVDFW) pr:par~dmanaQementg~idelines
for the protecti?n. of ea~I:~~ndtQ:ir habitat. ... A ~il~lifEe bi?I?~i~t\l\fithtt1.e \N~shington
~tatEe .D:p~rtrl1Ee.~t. of. Fish .aQ~\Ni'd,lifEe>9a~f:vie\l\fed, .m(i!i9it:/.~D~ f<:>Hn~itt1.~t~.f()rrrJeri bald
el3gil(i! fle~tis locat:9i ..o~..~D~9j~9rDtpr()PEettY .l3Ppro~irrJ~tEely~gg+.300 f:(i!t .from the
R(i!inhart's property comer l3nd wen over 800 feet from the propQsed home-site (Reinhart
2006. personal communication). It has been determined by WDFW that a Bald Eagle
Managemeht Plan is notfequired.
4.2 Project and Disturbance Impacts
The location for the proposed development on the Parcel appears to be the only logical
choice as this northeastern portion of the Property is the only area that is not heavily
forested and would not require additional clearing. Impacts caused by the installation of a
drainfield and septic system, the construction of a single-family residence, barn and RV
pad will be limited, as long as placement of these facilities is located outside of all
designated buffer zones.
A 50 foot buffer is required for the two Category III wetlands. The buffer zone for a Type 3
stream in Jefferson County is 100 feet. To allow more room for building purposes, a
proposed Buffer Width Averaging Plan has been formulated by Westech Company.
Twenty-five (25) feet has been subtracted on the north side of the stream from the buffer
zone downstream and east of the bridge, to create a 75 foot buffer for a linear distance of
approximately 300 feet. Twenty five (25) feet has been added to the buffer upstream from
the existing bridge, extending the buffer zone to 125 feet for a total linear distance of 300
feet on both sides of the stream, resulting in buffer averaging areas of 7,500 square feet
(See Figure 4).
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Potential impacts of the disturbance from both construction and alteration of the buffer
zones include the following:
1) Potential increases in erosion and sedimentation into the stream/wetlands
due to removal of buffer zone vegetation.
2) Consequent d~crease in water quality and/or fishery habitat due to
increases in turbidity, suspended sediment, and total sediment in the stream
and Lake Leland due to impacts from #1.
These impacts can be offset as described in the sections below. The Mitigation Measures
developed in this Plan are intended to fully compensate for the impacts to the lakeshore
environment and the buffer zone. Implementation of these Mitigation Measures will result
in an overall enhancement of habitat in this vicinity through enrichment of the buffer zone
vegetation, resulting in improvement of its functional value.
4.3 Plan Cornpqnents
The components of this Mitigation Plan are as follows:
1) Erosion control to prevent silt and sediment from entering the stream and
wetlands. This will be accomplished through project timing and
emplacement of control measures such as silt fences during construction of
the residence, barn, and RV pad, and installation of the drainfield and septic
system.
2) New shrubs and trees will be planted to mitigate for disturbance to the buffer
zone.
3) Existing non-native, invasive blackberry species are to be eradicated.
A more detailed description of Mitigation Measures is contained in the following section.
4.4 Detailed Mitigation Measures
The detailed Mitigation Measures corresponding to the Plan components listed above are
as follows:
1. Install all erosion control measures prior to beginning ground-disturbing
construction activities. Silt fences should be placed between the construction
zone and the streamlwetlands to protect water quality. Silt fences should be
placed at the downhill edge of construction zones.
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2. Three areas will be revegetated with new native plant species as specified in
the Habitat Management Plan described in Chapter 5.0. Planting success will
be monitored and will conform to performance standards as described in
Section 4.6. If performance standards are not met, additional plantings or other
remedial actions will be taken to meet the standards.
3. Non-native Himalayan blackberry, which occurs along the northern property
boundary in the northeastcorner of theParcel, shall be removed within the 50
fo()tRlJffer~one ()f."Y~t.l~n~ E3. by ~and rt1~th()~s an~ the areashtlUbe replanted
according to the Habitat Management Plan described in Chapter 5.0 (Area A in
Figure 5).
Implementation of the above MitiQ~tion Measures is anticipated to offset impacts of future
development in this area and will fully mitigate for disturbances that may occur within the
buffer zone due to the proposed BU~etWidth Averaging Plan. .It will be necessary to
ensure plant~;u8~ss throu~h monitoring. and,if nece~sary, remedial agtions including
replanting, additional watering or.other means as described in the.sections below.
4.5 Implementation and Timing
Any future development on the Site should be conducted between April 1 and October 15
if feasible, in order to avoid carrying out ground disturbing activities during the rainy
season (for minimization of erosion). Any work carried out during the rainy season should
have all erosion control measures in place prior to beginning work.
New plantings to be established in the buffer zone should be carried out during early fall if
possible (September-October) to avoid the necessity of supplemental watering. Plantings
can be placed during the winter or early spring if necessary. If plantings occur during
summer months, supplemental watering with a drip irrigation system or equivalent method
may be necessary. Water is not to be taken from the stream or Lake Leland for irrigation
purposes. Westech Company recommends that monitoring of these plantings be
conducted by an independent landscaping firm, certified arborist, registered nursery, or
qualified botanist.
4.6 Mitigation and Restoration Monitoring
Wetlands serve a variety of functions such as they transfer surface water into the ground,
thereby recharging groundwater supplies; they trap sediments and pollutants; and provide
stormwater detention, as well as fish and wildlife habitat.
Buffers are also important in that they reduce the adverse impacts of adjacent land uses
by stabilizing soil and preventing erosion; filter suspended solids, nutrients, and toxic
substances; moderate impacts of stormwater runoff; and reduce noise disturbance and
light intrusion. They can also provide important habitat for wildlife. Because wetlands and
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their associated buffer zones serve both a function and have value, it is important that
mitigation measures that are implemented to offset significant impacts to the wetland
and/or buffer are successful.
Monitoring success of erosion control measures will be carried out daily during the
construction period. Any evidence of significant erosion or sedimentation entering the
stream or wetlands will result in immediate action to block erosion and sediments. Such
siltation can best be blocked by additional silt fences, straw bales or temporary berms.
Monitoring success of new plants should be carried out according to the following
schedule:
1) Complete revegetation of required areas. Check soil conditions. Holes
should be of appropriate size, generally 2-3 times the size of the container,
filled ""ith topsoil. New plantirgs should be adequately watered immediately
Up?" plClcelllent in. thE! ground. Planting of the required areas should be
conducted by hand methods.
2) The percent of non-native species in the buffer enhancement should not
exceed ten percent. If monitoring indicates that more than ten percent of the
enhanced buffer consists of non-native or invasive species, contingency
measures must be implemented.
3) Jefferson County requires submission of an As-built drawing prepared by a
wetland biologist or landscape contractor within 30 days of plant installation.
The As-built drawing is used to determine plant survival during the
monitoring period. The County also requires that plants installed for
mitigation be obtained from a nursery, and any plant substitutions should be
approved by the County prior to planting. Non-native and/or landscaping
varieties of plants would not be considered acceptable substitutions.
4) Prepare an initial monitoring report at the end of the first growing season
following plantings. This report should address the success of the plantings.
Any plant mortality should be noted and corrected if plant survival falls below
100 percent during the first year, 90 percent the second year and below 85
percent during successive years. The landscape contractor should
guarantee 100 percent survival for the first year as this is standard industry
practice.
5) Monitoring needs to be conducted for five years with a monitoring report
submitted annually as required by Jefferson County. Monitoring reports
should note any corrective actions which are necessary including additional
supplemental plantings to compensate for plant mortality and the apparent
reasons for such mortality.
All reports should be submitted to Jefferson County for review and concurrence.
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4.7 Contingency Plan
A Contingency Plan should be prepared if Mitigation Measures appear to fail, particularly
in terms of erosion/sediment control.. or in the event revegetation of the designated sites
are unsuccessful. The Plan should also address any significant lack of success with new
plantings, particularly failure to meet the performance standards of 100 percent during the
first year, 90 percent the second year and below 85 percent during subsequent years.
The Contingency Plan should include actions which will be taken to correct any defects
and accomplish the intended purpose of the Project.
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5.0 HABITAT MANAGEMENT PLAN
A Planting Plan as diagrammed in Figure 5 will be implemented to mitigate for the effects
of disturbance to the buffer area. Revegetation and planting of additional vegetation will
be carried out as an integral part of the project to compensate for environmental impacts
caused by the ground disturbing activity. The designated planting areas are:
· Area A is located east of the proposed home-site and is a section of the 50 foot
buffer.~?n~of \fIJe~I~Op~. Itisanar~a dmnin~t~d by ljirn~layant)lc:l(*b~rry \\I.hich
as described in Section 4.4 is an introduced weedy species that should. be culled.
This area is to be completely cleared of non-native vegetation and will be replanted
with native trees and shrubs.
· Area B.isa length of the stream west of its mouth where the stream empties into
Lake L~I.and. This planting .area involves the stream floodplain or channel. It is
approximately 5-1 Ofe:t to ~iiWer side of the stream. This area within the defined
stream banks will bepl~mtedwith.facultative shrubs.
· Area C is. mitigating. for a 12 x 45 foot section of driveway recently installed within
the proposedZ~footbuffer reduction area. (The first3Q feet ofdriyeway east ofthe
bridge was already in existence, as was the bridge itself.) Three locations to either
side of the driveway will be planted with upland shrubs, resulting in a 1700 square
foot total planting area.
Plants installed in the fall usually outperform those installed in the late winter or spring.
Planting projects scheduled for early October to mid-December are generally the most
successful. The earlier plants go into the ground in the fall, the more time they have to
recover from transplant shock, adapt to the site, and expand their root systems before the
growing season. They will require less water and grow more vigorously than if they are
planted in the spring. To increase the potential for the planted species to survive, four
inches of mulch should be placed around the installed plants with the mulch two inches
away from the stem of the plants.
Success depends on choosing species that are not only suited to the site conditions, but
are also hardy and adaptable, capable of handling nutrient poor soil, scarce water and
shade, and competitive weeds. The.. native trees and shrubs selected for this part of the
Mitigation and Habitat Management Plan were based on the amount of soil moisture and
sunlight they prefer.
The species, size and number of plants that will be used to revegetate these areas is
shown in Table 1. Plants will be placed in a semi-random fashion within the areas
indicated in Figure 5. Trees will be placed on ten foot centers and shrubs will be planted
on a minimum of six foot centers. Vegetation should be planted in semi-random manner
within each location because staggering of plants in this fashion, rather than planting in
straight rows, will create a more natural appearing configuration. Plants may be clustered
by species in order to assist in natural reseeding.
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Establishment of these plants is designed to eliminate or minimize any long-term effects of
the proposed development of the Site. Due to the minor nature of the disturbance
associated with the Buffer Averaging Plan as outlined, these plantings appear to be
sufficient to fully mitigate future impacts of construction within the buffer zone.
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I Approximate Scale - 1 inch = 100 feet
I
Forested
Area
Silt Fence along t
Buffer Line
Proposed Blackberry
RV Pad removal
N
"
"
" 125'
Forested /\ Buffer
Area 125' \ Zone
Buffer ,I
Zone ~
'/
.
.
\
Lake
Leland
Forested
Area
Wetland
Boundary
Approx.
Wetland
Boundary> . .
.
.
Lake
Leland
.""
. ........ I Wetland Boundary
- . . - Approx. Wetland Boundary
Forest Area Boundary
- . . - Buffer Zones
- - - - -' Stream
Driveway
[',.""""''>.1 Planting Area A
""""""''-"l Planting Area B
1.""""""'1 Planting Area C
Figure 5. Planting Plan (Eastern Portion of Property)
Westech Company 2006
Source: Westech Company 2007
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TABLE 1. LIST OF NATIVE PLANTS FOR
BUFFER MITIGATION AND ENHANCEMENT
Location Species Number Scientific Name Size
A Cascara 5 Rhamnus purshiana 3 gallon
A Red-flowering currant 17 Ribes sanguineum 1 gallon
A Snowberry 15 Symphoricarpos a/bus 1 gallon
A Pacific ninebark 5 Physocarpus capitatus 3 gallon
A Indian plum 25 Oem/eria cerasiformis 1 gallon
A Red elderberry 25 Sambucus racemosa 1 gallon
B Nootka rose 61 Rosa nutkana 1 gallon
B Black twinberry 61 Lonicera invo/ucrate 1 gallon
B Salmonberry 61 Rubus spectabilis 1 gallon
C Oceanspray 12 H%discus disc%r 1 gallon
C Thimbleberry 12 Rubus parviflorus 1 gallon
C Sword fern 12 Po/ystichum munitum 1 gallon
C Bracken fern 11 Pferidium aquilinum 1 gallon
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6.0 CONCLUSIONS AND RECOMMENDA liONS
6.1 Conclusions
The Site consists of a 12 acre parcel located at 893 Snow Creek Road. Lake Leland
borders the east side of the Site. The landowner, Dr. Ronald Reinhart, intends to build a
single-family residence, a barn and RV pad in the northeast portion of the Property. This
area is rel~tiv~ly open. ~nd.is J~e rno~t l()gi~1 pl~cE! for dE!\lE!Ic)ern.E!ntsin~. thE!. rema.inder
of the Property is natural upland forest. The Site also contains two Category III wetlands
and a Type 3 stream, further restricting the area proposed for development.
In order to allow more room. forbuilding purposes, Buffer Averaging is recommended
along the stream. A 25 percent buffer reduction would be needed on the north side of the
stream with a compensatory addition to the buffer along a different stretch of the stream to
the west of the existing bridge.
Mitigation. Measyr~s hav~. 9.~enfortl1.ul.ated .in Ch~pter 4.0 to offset impCictS t() the buffer
zone. These include planting additional native trees and shrubs in certain areas of the
buffer zone. Additionally, it will include erosion control and removal of an introduced
species (Himalayan blackberry) in the buffer zone.
6.2 Recommendations
This Report constitutes a combined Mitigation and Habitat Management Plan and is
intended as supporting documentation to justify Buffer Width Averaging as per the
requirements of Jefferson County Unified Development Code18.15.340. Westech
Company recommends buffer averaging be permitted and that all mitigation and planting
requirements be followed. A Planting Plan (Chapter 5.0) has been included in this report
and we advise that it be implemented on the Site upon approval by the County.
We recommend that the property be permitted for development as per the provisions of
Jefferson County Code, provided that the single-family residence, barn, RV pad, drainfield
and septic system are placed entirely outside the averaged buffer zone. Construction
activities should not be conducted in the designated buffer zone.
A construction fence (silt fence or equivalent erosion control measure) should be
emplaced around the construction areas based on topography and runoff potential from
the construction site to the stream or wetlands. Other standard drainage and erosion
control measures should be undertaken in accordance with Jefferson County regulations
(Jefferson County 2001). Such measures would include placement of straw bales or
similar control devices at the downhill edge of construction areas and spreading straw or
jute netting (or similar measures) overexposed soil areas.
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Jefferson County has indicated, as a condition of approval, that the landowner is required
to install silt fencing along the outer edge of the wetland and stream buffers prior to
beginning any clearing and grading on the Property. And the County is to be contacted to
review the location of the silt fencing relative to the wetland and stream boundaries prior to
initiating any ground-disturbing activities.
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7.0 REFERENCES
Cooke, S.S. 1997. A Field Guide to the Common Wetland Plants of Western Washinaton
and Northwestern Oreaon. Seattle Audubon Society. Seattle, Washington.
Guard, J. 1995. Wetland Plants of Washington and Oregon. Lone Pine Publishing.
Renton, Washington.
Hitchcock, C.L. and A. Cronquist. 1973. Flora of the Pacific Northwest. University of
Washington Press. Seattle, Washington.
Jefferson County. 2007. Letter to Ronald Reinhart dated March 26, 2007 from Zoe Lamp,
Jefferson County Department of Community Development. Port Townsend,
Washington.
JeffersonqouQty... 2006. .~etter to. Ronald Reinhart dated. j\ugust 30, 2006 from Zoe
LamP, ~efferson County Department of Community Development. Port Townsend,
Washington.
Jefferson County. 2006. Online Map Database. Accessed March/April 2006.
httpllmaps.co.jefferson.wa. usIWebsite/parcels/viewer.htm. Jefferson County,
Washington.
Jefferson County. 2001. Jefferson County Unified Development Code. Section 3, Land
Use Districts, Subsection 3.6 - Wetlands. Department of Community Development.
Port Townsend, Washington.
Lyons, C.P. 1997. Wildflowers of Washington. Lone Pine Publishing. Renton,
Washington.
Microsoft Corporation. 2000. Microsoft MapPoint Interactive Mapping Software.
Redmond, Washington.
Munsell Color. 1994. Munsell Soil Color Charts. Gretag Macbeth. New Windsor, New
York.
pojar, J. and A. MacKinnon. 1994. Plants of the Pacific Northwest Coast. Lone Pine
Publishing Company. Redmond, Washington.
Soils Application, Inc. 2007. On-site Wastewater Plan for Reinhart parcel (#802261001)
dated January 10, 2007. Sequim, Washington.
Taylor, R. 1995. Northwest Weeds. Mountain Press Publishing Company. Missoula
Montana.
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U.S. Army Corps of Engineers (ACOE). 1989. Federal Manual for Identifvina and
Delineatina Jurisdictional Wetl,nds. U.S. Government Printing Office. Washington,
D.C.
U.S. Fish and Wildlife Service (USFWS). 1988. National List of Species that Occur in
Wetlands: Reaion 9 (and Supplement). Biological Report 88(26.9). Portland,
Oregon.
U.S. Soil.Cor1~ervation S~rvi?~. (~gS). .1975. ~oil.. Survey()f .Jefferson Countv Area.
Washington. U.S. Department of Agriculture. Washington, b.C.
Washington Department . of .5?ology (WDOE). 1997. . \iVashinaton . ~tat~ Wetlands
Identification and Delineation Manual. Publication #96-94. Olympia, Washington.
Washington Dep~rtrnent of Ecol.pgy (WDOE). 1993.. Washinatpn.~t~t~ Wetlands .Ratina
Sv~ten1: VVestern Washinaton. Second Edition. Publication # 93'-74. Olympia,
Washington.
Westech Company. 2006. Wetland Delineation Report: 893 Snow Creek Road.
Assessor's Parcel #802261001. April 2006. Port Angeles, Washington.
Wildflower Productions. 1998. TOPO Olympic Peninsula, San Juan Islands and Puget
Sound: Olympics. San Francisco, California.
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APPENDIX A
SITE PHOTOGRAPHS
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2) Type 3 Stream.
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Planting area Band strea I buffer zone.
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APPENDIX B
JEFFERSO: COUNTY HABITAT MAP
WVV1035REVSCHMP.APPB/061307/xmk B-1
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