20-102489-Tree Retention Exhibit-2020-05-15-V1S. 320TH STREET32ND AVE. S NATIVEVEGETATIONTO BE RETAINED~198,139 SFNATIVEVEGETATIONTO BE CLEARED~49,746 SFINTACT NATIVEVEGETATIONTO BE REMOVED~2,398 SFPROPOSEDWETLAND BUFFERPROPOSEDBUILDINGPROPOSEDBUILDINGPROPOSEDSTORMPONDPROPOSEDPARKING/ASPHALTWETLAND AINTACT NATIVEVEGETATION~250,283 SFCLEARED/INVASIVE/DISTURBEDVEGETATION~617,405 SFSTANDARD 80'WETLAND BUFFERWETLAND ALEGENDINTACT NATIVE VEGETATION(~250,283 SF)CLEARED / INVASIVE / DISTURBEDVEGETATION (~617,405 SF)NATIVE VEGETATION TO BE RETAINED(~198,139 SF)NATIVE VEGETATION TO BE CLEARED(~52,144 SF)BY: DBSCALE: SEE GRAPHICSOURCES:PRELIMINARYINFORMATION ONLYNOT FOR CONSTRUCTIONSOUNDVIEW CONSULTANTS LLC ASSUMESNO LIABILITY OR RESPONSIBILITY FORCONSTRUCTION, IMPROVEMENTS, ORESTIMATES BASED ON THIS PLAN SETPAPE - KENWORTH NORTHWEST - VEGETATION RETENTION PLANPROPOSED VEGETATION CONDITIONSEXISTING VEGETATION CONDITIONSTHE EXISTING SITE IS OCCUPIED BY AREAS OF NATIVE VEGETATION ANDAREAS THAT HAVE BEEN CLEARED. WEST PORTIONS OF THE SITEREMAIN AS NATIVE VEGETATION WITHIN AN ONSITE WETLAND ANDPORTIONS OF BUFFER AREAS. EAST PORTIONS OF THE SITE HAVE BEENCLEARED FOR EXISTING HOMES, UTILITIES CORRIDORS, AND HORSESTABLES AND TRAILS. THE UTILITIES CORRIDORS ARE BEINGMAINTAINED WITH NO TREES AND ALL CLEARED AREAS CONTAINVARYING AMOUNTS OF INVASIVE PLANT SPECIES MOSTLY COMPRISEDOF HIMALAYAN BLACKBERRY. SOME NATIVE TREES ARE LOCATEDWITHIN THE CLEARED AREAS; HOWEVER NATIVE UNDERSTORYVEGETATION WITHIN THESE AREAS IS DOMINATED BY INVASIVE SPECIES.APPROXIMATELY 80 PERCENT OF THE EXISTING RELATIVELYUNDISTURBED NATIVE VEGETATION IS PROPOSED FOR RETENTION. THEPROPOSED SITE DEVELOPMENT IS LOCATED WITHIN THE EAST PORTIONOF THE SITE WHERE MOST OF THE NATIVE VEGETATION IS CURRENTLYIMPACTED BY THE EXISTING HOMES, UTILITY CORRIDORS, INVASIVESPECIES, AND HORSE STABLES AND TRAILS.VEGETATION RETENTION NARRATIVESHEET INDEX1VEGETATION RETENTION PLAN2TREE RETENTION PLAN1SHEETPAPE - KENWORTH
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3014 SOUTH 320TH ST.
FEDERAL WAY, WASHINGTON 98003
THE SE 1 4 OF SECTION 09, TOWNSHIP 21N,
RANGE 04E, W.M.DATE: 5/15/2020JOB: 1779.0002OF 2
S. 320TH STREET32ND AVE. S SP2SP3SP4SP5SP1TREE RETENTION AREAWITHIN SAMPLE SURVEY(~83,323 SF)25' RADIUSTREE SAMPLE PLOT(TYP)PROPOSEDWETLAND BUFFERONSITE WETLAND(~ 80,689 SF)UTILITY LINEEASEMENTS(~ 206,193 SF)ADDITIONAL TREE RETENTION AREAS(NOT SAMPLED OR COUNTED TOWARDTREE RETENTION REQUIREMENTS)(~44,009 SF)WETLAND APROPOSEDSTORMPONDPROPOSEDPARKING/ASPHALTPROPOSEDBUILDINGPROPOSEDBUILDINGLEGENDTREE RETENTION SAMPLE AREA~83,323 SF (1.91 ACRES)ADDITIONAL TREE RETENTION AREAS~44,009 SF (1.01 ACRES)AREAS NOT SUITED FOR TREE PLANTING~80,689 SF (1.85 ACRES)TREE SAMPLE PLOTSP5PAPE - KENWORTH NORTHWEST - TREE RETENTION PLANBY: DBSCALE: SEE GRAPHICSOURCES:PRELIMINARYINFORMATION ONLYNOT FOR CONSTRUCTIONSOUNDVIEW CONSULTANTS LLC ASSUMESNO LIABILITY OR RESPONSIBILITY FORCONSTRUCTION, IMPROVEMENTS, ORESTIMATES BASED ON THIS PLAN SETTREE RETENTION PLANTHE EXISTING TREES ONSITE ARE PRIMARILY COMPOSED OF A MIX OFNATIVE DECIDUOUS AND CONIFER SPECIES INCLUDING DOUGLAS-FIR(PSEUDOTSUGA MENZIESII), WESTERN RED CEDAR (THUJA PLICATA),RED ALDER (ALNUS RUBRA), BIGLEAF MAPLE (ACER MACROPHYLLUM),WESTERN HEMLOCK (TSUGA HETEROPHYLLA), AND SMALL PATCHES OFPACIFIC CRABAPPLE NEAR THE ONSITE WETLAND.TREE DISTRIBUTION ACROSS THE SITE IS VARIABLE ACROSS THE SITEWITH HIGHER TREE DENSITIES WITHIN THE WETLAND BUFFER AREAS INTHE WEST PORTION OF THE SITE AND LOWER TREE DENSITY WITHINTHE EASTERN PORTION OF THE SITE WHERE AREAS HAVE BEENCLEARED FOR EXISTING SINGLE FAMILY HOMES, UTILITY CORRIDORS,AND HORSE STABLES AND TRAILS.OVERALL TREE VIGOR, FORM, AND HEALTH IS GOOD WITHIN THESTAND. SOME INDIVIDUAL TREES WITHIN THE TREE RETENTION AREAARE SEVERELY DAMAGED OR DEAD AND ARE NOT CREDITED TOWARDTREE RETENTION.THE STRATEGY FOR TREE RETENTION IS TO PROVIDE AN INTACT NATIVETREE CANOPY ALONG THE WEST PORTIONS OF THE SITE ADJACENT TOTHE ONSITE WETLAND. THIS WILL PROVIDE FOR WATER QUALITY,HYDROLOGIC, AND HABITAT FUNCTIONS TO THE WETLAND. THE AREASURVEYED AND CREDITED FOR TREE RETENTION COVERSAPPROXIMATELY 1.91 ACRES AND PROVIDES AN ESTIMATED 526 TREEUNITS, NEARLY TWICE THE REQUIRED TREE UNITS. TREE UNITS WEREDETERMINED IN ACCORDANCE WITH FWRC 19.120.130. ANADDITIONAL AREA OF APPROXIMATELY 1 ACRE OF TREE RETENTION YOUTSIDE THE TREE SAMPLE SURVEY IS BEING MAINTAINED ALONG THEWEST PROPERTY BOUNDARY WITHIN THE WETLAND BOUNDARY. TREEUNITS WERE NOT CALCULATED WITHIN THIS ADDITIONAL TREERETENTION AREA AND THESE TREES ARE NOT BEING APPLIEDTOWARDS THE TREE RETENTION REQUIREMENTS FOR THE PROJECT;HOWEVER, BASED ON VISUAL OBSERVATION OF THE AREA, TREEDENSITIES ARE CONSISTENT WITH THE SAMPLE SURVEY AREA.TREE SAMPLING METHODOLOGY CONSISTED OF USING A 25-FOOTFIXED PLOT RADIUS. A SAMPLING INTENSITY OF 11.78 PERCENT WASUSED TO ESTIMATE TREE UNITS WITHIN THE SAMPLE AREA. TREEHEALTH DETERMINATIONS WERE MADE USING CURRENTMETHODOLOGY AND IN ACCORDANCE WITH THE STANDARDS ANDPRACTICES OF THE INTERNATIONAL SOCIETY OF ARBORICULTURETREE RETENTION NARRATIVE2SHEETPAPE - KENWORTH
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3014 SOUTH 320TH ST.
FEDERAL WAY, WASHINGTON 98003
THE SE 1 4 OF SECTION 09, TOWNSHIP 21N,
RANGE 04E, W.M.DATE: 5/15/2020JOB: 1779.0002OF 21.THE TREE SURVEY WAS PERFORMED BY MONICA SZARVAS,CERTIFIED ARBORIST AND DON BABINEAU, PROFESSIONALFORESTER ON JANUARY 29, 2020.2.ANY TREES TO BE RETAINED SHALL BE OF GOOD HEALTH AND FREEFROM DAMAGE AND DEFECT. DURING AND FOLLOWING SITE CLEARING AND CONSTRUCTION ACTIVITIES, TREES DESIGNATED FORRETENTION THAT ARE DETERMINED TO BE UNHEALTHY OR DAMAGEDAND POSE A HAZARD SHALL BE REMOVED. DUE TO THE INHERENT RISK OF FAILURE FROM SEVERE WEATHER, UNDETECTABLE AND HIDDEN DISEASE, DEFECT, AND DAMAGE OF THE TREES TO BE RETAINED, SOUNDVIEW CONSULTANTS ASSUMES NO LIABILITY FORBODILY INJURY, DEATH, OR PROPERTY DAMAGE RESULTING FROMFAILURE OF THE TREES TO BE RETAINED.NOTES:Shauna WillettCertified Arborist #WE-7452A