Loading...
24-100687-Tree Retention Plan-02.22.24SUF SOUND URBAN FORESTRY, LLC Appraisals, Planning, Urban Landscape Design, Risk Assessments and Management Dash Point Palisades 5101 SE 316th Place Federal Way, WA 98023 (TPN 1021039016, 1021039001 & 1021039040) Tree Retention Plan Prepared for: JKM Holdings, LLC, Geoff Sherwin Prepared by: Kevin M. McFarland, SUF Consulting Urban Forester ISA Certified Arborist/Tree Risk Assessor Qualified Date: 2/12/2024 Introduction The following report has been developed for the proposed Dash Point Palisades single- family residential project in Federal Way, Washington. The purpose of this report is to present the information necessary to satisfy the City’s Revised Code (FWRC) 19.120.040 (2) (a) through (e). I have personally visited the site to conduct an inventory of the trees within the property and assessed each tree to be retained. I. Site and Project Description The 3.86-acre site has been partially developed with a former residence located at the extreme northern portion. It is predominantly forested with the exception of an open grassed area associated with the residence. The dominant species are Douglas fir and red alder. Also found is a typical mixture of western hemlock, western red cedar and pacific madrone. With the exception of the hemlock, most trees are in fair to good condition with no issues of disease or pockets of past storm damage identified. The proposed project includes 13 single-family residential lots with access for each lot off of 51st Ave SW. II. Tree Survey I personally visited the site on August 28, 2023 to conduct an inventory and tag all trees measuring 6” and greater. These trees were then surveyed by Larson and Associates and are presented in Table 1. Table 1. Surveyed Trees ID # Species DBH Condition 1 Douglas Fir 14" Good 2 Pine 12" Good 3 Madrone 5",3" Good 4 Madrone 8" Good 5 Douglas Fir 10" Good 6 Douglas Fir 10" Good 7 Douglas Fir 9" Good 8 Western Red Cedar 18" Fair 9 Red Alder 4",5", 6", 7" Poor 10 Douglas Fir 6" Poor 11 Douglas Fir 7" Poor 12 Madrone 10" Fair 13 Crabapple 17" Fair 14 Flowering Cherry 19" Fair 15 Douglas Fir 28" Good 16 Douglas Fir 29" Good 17 Douglas Fir 31" Good 18 Red Alder 32" Poor 19 Deodar Cedar 22" Good 20 Deodar Cedar 22" Good 21 Douglas Fir 22" Good 22 Madrone 8" Fair 23 Madrone 11" Fair 24 Madrone 12",7" Poor 25 Madrone 10" Fair 26 Madrone 16",18",17" Poor ID # Species DBH Condition 27 Madrone 12" Poor 28 Madrone 10" Poor 29 Pacific Dogwood 8" Good 30 Madrone 17" Good 31 Big Leaf Maple 14" Fair 32 Bitter Cherry 6",4" Poor 33 Purple Plum 8",4" Fair 34 Douglas Fir 30" Fair 35 Douglas Fir 31" Fair 36 Douglas Fir 28" Good 37 Plum 6",6",14" Poor 38 Plum 14" Poor 39 Red Alder 18",19" Fair 40 Plum 12" Fair 41 Plum 8" Fair 42 Fruiting Cherry 19" Fair 43 Western Red Cedar 30" Fair 44 Red Alder 28" Poor 45 Cascara 6" Fair 46 Douglas Fir 26" Fair 47 Red Alder 18" Good 48 Red Alder 17" Poor 49 Western Hemlock 20" Fair 50 Red Alder 10" Fair 51 Red Alder 14" Fair 52 Red Alder 14" Poor 53 Red Alder 16" Fair 54 Red Alder 14" Fair 55 Madrone 8" Fair 56 Cottonwood 50" Fair 57 Red Alder 12" Poor 58 Cascara 11" Fair 59 Red Alder 16" Fair 60 Douglas Fir 18",8" Fair 61 Douglas Fir 17" Good 62 Big Leaf Maple 21" Good 63 Willow 12" Fair 64 Willow 18" Good 65 Crabapple 13" Fair 66 Bird Cherry 14" Fair 67 Red Alder 18",19" Poor 68 Douglas Fir 26" Good 69 Bird Cherry 14" Fair ID # Species DBH Condition 70 Red Alder 17" Fair 71 Red Alder 17" Fair 72 Red Alder 8" Poor 73 Red Alder 8" Fair 74 Douglas Fir 16" Good 75 Red Alder 17" Poor 76 Red Alder 14" Poor 77 Red Alder 17" Fair 78 Red Alder 15" Poor 79 Willow 14" Fair 80 Red Alder 12" Poor 81 Cottonwood 55" Fair 82 Big Leaf Maple 8" Fair 83 Red Alder 18" Fair 84 Red Alder 15" Fair 85 Western Red Cedar 6" Good 86 Western Red Cedar 40" Good 87 Western Red Cedar 6" Good 88 Western Red Cedar 9" Good 89 Western Red Cedar 26" Good 90 Western Red Cedar 24" Poor 91 Western Red Cedar 24" Good 92 Bird Cherry 6" Good 93 Bird Cherry 6" Good 94 Red Alder 17" Fair 95 Red Alder 14" Fair 96 Red Alder 14",16" Poor 97 Red Alder 20" Fair 98 Big Leaf Maple 24" Good 99 Douglas Fir 18" Fair 100 Western Hemlock 10" Fair 101 Western Hemlock 20" Poor 102 Red Alder 14" Fair 103 Madrone 10",13" Fair 104 Douglas Fir 31" Poor 105 Big Leaf Maple 40" Fair 106 Douglas Fir 18" Good 107 Big Leaf Maple 8" Good 108 Douglas Fir 30" Good 109 Douglas Fir 26" Good 110 Douglas Fir 18" Fair 111 Douglas Fir 32" Good 112 Bird Cherry 14" Good ID # Species DBH Condition 113 Douglas Fir 36" Good 114 Douglas Fir 17" Poor 115 Douglas Fir 14" Fair 116 Douglas Fir 36" Good 117 Red Alder 12",17" Fair 118 Western Hemlock 19" Good 119 Western Hemlock 18" Fair 120 Red Alder 26" Fair 121 Douglas Fir 28" Fair 122 Douglas Fir 22" Fair 123 Douglas Fir 28" Fair 124 Douglas Fir 30" Fair 125 Douglas Fir 20" Fair 126 Douglas Fir 8" Fair 127 Douglas Fir 20" Fair 128 Douglas Fir 7" Fair 129 Douglas Fir 28" Good 130 Douglas Fir 38" Good 131 Douglas Fir 16" Fair 132 Douglas Fir 32" Good 133 Big Leaf Maple 16" Good 134 Douglas Fir 15" Fair 135 Douglas Fir 24" Poor 136 Bird Cherry 11" Poor 137 Bird Cherry 8" Fair 138 Bird Cherry 11" Fair 139 Western Hemlock 20" Fair 140 Douglas Fir 44" Poor 141 Madrone 16" Good 142 Western Hemlock 20" Fair 143 Bird Cherry 10" Fair 144 Douglas Fir 20" Fair 145 Douglas Fir 18" Fair 146 Douglas Fir 43" Poor 147 Douglas Fir 46" Good 148 Western Hemlock 14" Poor 149 Douglas Fir 26" Fair 150 Douglas Fir 26" Fair 151 Douglas Fir 19" Fair 152 Western Hemlock 20" Fair 153 Western Hemlock 36" Good 154 Red Alder 8" Good 155 Western Red Cedar 36" Good ID # Species DBH Condition 156 Western Hemlock 24" Good 157 Western Hemlock 18" Good 158 Western Hemlock 17" Fair 159 Douglas Fir 38" Poor 160 Western Hemlock 28" Fair 161 Douglas Fir 36" Good 162 Douglas Fir 12" Fair 163 Western Red Cedar 14" Good 164 Western Red Cedar 18" Good 165 Western Red Cedar 15" Good 166 Douglas Fir 19" Good 167 Douglas Fir 28" Good 168 Western Red Cedar 14" Good 169 Douglas Fir 36" Fair 170 Western Red Cedar 12" Good 171 Douglas Fir 15" Poor 172 Western Red Cedar 10" Fair 173 Western Red Cedar 12" Fair 174 Douglas Fir 19" Fair 175 Douglas Fir 8" Fair 176 Douglas Fir 20" Fair 177 Western Red Cedar 20" Good 178 Douglas Fir 22" Poor 179 Douglas Fir 20" Fair 180 Douglas Fir 32" Fair 181 Douglas Fir 18" Poor 182 Western Hemlock 17" Fair 183 Western Hemlock 18" Fair 184 Douglas Fir 26" Poor 185 Douglas Fir 36" Poor 186 Douglas Fir 26" Poor 187 Douglas Fir 38" Fair 188 Douglas Fir 17" Poor 189 Douglas Fir 30" Fair 190 Western Hemlock 14" Poor 191 Western Hemlock 13" Poor 192 Western Red Cedar 8" Good 193 Western Hemlock 22" Fair 194 Douglas Fir 36" Fair 195 Douglas Fir 26" Good 196 Douglas Fir 24" Fair 197 Douglas Fir 32" Poor III. Tree Removal Initial plans were to retain approximately 40 trees along the western perimeter of the property (highlighted in green on Appendix 1)). However, due to a combination of impacts from required arsenic mitigation, grading and trees in poor condition, all but two trees at the north end will be removed. Per information that I have received from the client, according to soil test results, the southern 2/3 of the property will require that the soil be mixed to a depth of 12-18” in order to dilute the level of arsenic. This is not compatible with tree retention and would have a detrimental impact to the critical root zones. IV. Tree Retention A total of 2 trees (#12 & #13) or 3.5 tree unit credits are being proposed for retention. Below is a summary of the retention calculations. Gross acreage = 3.86-acres Minimum tree density (3.86 acres x 25 units/acre) = 96.5 tree units Proposed retention (#12 = 1.5, #13 = 2) = 3.5 tree units Required replanting = 93 tree units V. Tree Protection I am recommending that tree protection fencing be installed around the two trees to be retained as shown in orange on Appendix 2. VI. Replanting With direction from the client, the following replanting is proposed to meet the required tree units. The selections of trees have been chosen to provide buffers between the adjoining properties as well as avoid future conflicts with aggressive roots and dropping fruit/seeds. Area Proposed Tree Number of Trees Category Tree Units Along east side of 51st Ave SW American Arborvitae (Thuja occidentalis) or Steeplechase Cedar (Thuja plicata ‘Steeplechase’) 20 Medium 20 North triangle Incense Cedar (Calocedrus decurrens) and/or Western Hemlock (Tsuga heterophylla) 10 Large 15 Individual Lots Sugar Maple (Acer saccharum) and/or Black Gum (Nyssa sylvatica) 3 per lot/ 39 Large 58.5 Total = 93.5 Professionally Submitted, Kevin M. McFarland, Principal ISA Certified Arborist PN-0373 & ISA Tree Risk Assessor Qualified Sound Urban Forestry, LLC P.O. Box 489 Tahuya, WA 98588 360-870-2511 Locations of Inventoried Trees Trees to be Retained and Recommended Tree Protection Fencing