The URL can be used to link to this page

Home My WebLink AboutEx_07_Tree_Retention_ReportWASHINGTON FORESTRY CONSULTANTS, INC. FORESTRY AND VEGETATION MANAGEMENT SPECIALISTS W F C I O: 360/943-1723 C: 360/561-4407 9136 Yelm Hwy SE Olympia, WA 98513 URBAN/RURAL FORESTRY • TREE APPRAISAL • TREE RISK ASSESSMENT RIGHT-OF-WAYS • VEGETATION MANAGEMENT • FOREST/TREE MGT. PLANS • EXPERT TESTIMONY Member of International Society of Arboriculture and Society of American Foresters MEMO TO: Alex Morganroth Senior Planner City of Renton FROM: Washington Forestry Consultants DATE: November 15, 2023 RE: New Life Church Tree Replacement Calculations Mr. Morganroth: We have completed the City of Renton Tree Retention and Credit Worksheet for the New Life Church project. All reasonable efforts have been taken to preserve trees utilizing the highest priority possible per Renton Municipal Code. The project is planning to remove three trees in the existing parking lot and five trees along the Maple Valley Hwy frontage to construct the proposed project. All remaining trees on the site will be preserved. The subject parcel is 55.14-acres in size with 34.46-acres preserved in critical areas. Most of the remaining 20.68-arces has been developed with the existing church buildings, parking lots, and open fields. Small parts of non-critical acreage have been preserved as forested areas. A tally of trees was completed in the developed portion of the site and twelve variable area plots were installed on a systematic grid in the critical areas to determine the size and total number of trees on the parcel. The plot locations are marked in the field with orange flagging. Data from the plots were entered into SuperAce®, a forest inventory software program that projected the total number of significant trees in those stands. See Attachment 1 for a map of the site showing critical areas and proposed tree retention. DocuSign Envelope ID: 8DC95E5E-DFD2-4FC3-AECA-A837B4E4B02A New Life Church Tree Retention Memo Washington Forestry Consultants, Inc. Page 2 The calculated minimum density for the site is 620 tree credits and 114 significant trees. The current site plan retains 371 significant trees on the site totaling 2,211 tree credits. This exceeds the minimum density by 257 trees and 1,591 tree credits. No tree replacement is required. Please give us a call if you have any questions. Respectfully submitted, Washington Forestry Consultants, Inc. Galen M. Wright, ACF, ASCA Joshua Sharpes ISA Bd. Certified Master Arborist PN-129BU Professional Forester Certified Forester No. 44 ISA Certified Arborist®, ISA Tree Risk Assessor Qualified Municipal Specialist, PN- 5939AM ASCA Tree and Plant Appraisal Qualified ISA Tree Risk Assessor Qualified DocuSign Envelope ID: 8DC95E5E-DFD2-4FC3-AECA-A837B4E4B02A New Life Church Tree Retention Memo Washington Forestry Consultants, Inc. Page 3 Attachment 1. Map of New Life Church Site With Trees Saved by Area Parcel Boundary Critical Areas Non-critical Areas 147 trees 721 credits 135 trees 742 credits 89 trees 748 credits 3,914 trees DocuSign Envelope ID: 8DC95E5E-DFD2-4FC3-AECA-A837B4E4B02A New Life Church Tree Retention Memo Washington Forestry Consultants, Inc. Page 4 Attachment 2. City of Renton Tree Retention and Credit Worksheet 3 pages DocuSign Envelope ID: 8DC95E5E-DFD2-4FC3-AECA-A837B4E4B02A rentonwa.gov/permitcenter | planningcustomerservice@rentonwa.gov | 425-430-7294 10/6/2022 Page 1 of 3 CITY OF RENTON Ι PERMIT CENTER TREE RETENTION AND CREDIT WORKSHEET TREE RETENTION REQUIREMENTS A minimum retention of thirty percent (30%) of all significant trees (as defined in RMC 4-11-200) is required on site. Please complete the form below to verify compliance with minimum tree retention requirements. • Identify total number of trees 6-inch caliper or greater (or alder or cottonwood trees 8-inch caliper or greater) on site: Trees Trees Trees Trees Trees Trees Required Trees Proposed •Deductions – Certain trees are excluded from the retention calculation: o Trees that are high-risk, as defined in RMC 4-11-200: o Trees within existing and proposed public right-of-way: o Trees within wetlands, streams, very high landslide hazards, protected slopes, and associated buffers: •Total remaining trees after deductions: •Required tree retention (30%): •Identify number of trees proposed for retention: •Identify number of trees requested for replacement in lieu of retention (skip page 3 if no tree replacement is requested):Trees TREE CREDIT REQUIREMENTS Tree credit requirements apply at a minimum rate of thirty (30) credits per net acre. Complete the form below to determine minimum tree credit requirements. •Gross area of property in square feet: Square Feet •Deductions: Certain areas are excluded from tree credit calculation: o Existing and proposed public right-of-way: Square Feet o Wetlands, streams, very high landslide hazards, protected slopes, and associated buffers: Square Feet •Total excluded area:Square Feet •Net land area (after deductions) in square feet:Square Feet •Net land area (after deductions) in acres:Acres •Required tree credits:Tree Credits Required 4293 0 0 3914 379 113.7 371 -257.3 2401898 0 1501275 1501275 900623 20.675459136822774 620.2637741046832 DocuSign Envelope ID: 8DC95E5E-DFD2-4FC3-AECA-A837B4E4B02A rentonwa.gov/permitcenter | planningcustomerservice@rentonwa.gov | 425-430-7294 10/6/2022 Page 2 of 3 TREE RETENTION AND CREDIT WORKSHEET PROPOSED TREE CREDITS Please complete the table below to calculate the total tree credits proposed for your project. Identify the quantity of trees for each tree category, after deducting trees within excluded areas, as shown in the previous section. TREE SIZE TREE CREDITS TREE QUANTITY TOTAL TREE CREDITS RETAINED TREES Preserved tree 6 – 9” caliper 4 Preserved tree 10 – 12” caliper 5 Preserved tree 12 – 15” caliper 6 Preserved tree 16 – 18” caliper 7 Preserved tree 19 – 21” caliper 8 Preserved tree 22 – 24” caliper 9 Preserved tree 25 – 28” caliper 10 Preserved tree 29 – 32” caliper 11 Preserved tree 33 – 36” caliper 12 Preserved tree 37” caliper and greater 13 NEW TREES New small species tree (30' or less at maturity) 0.25 New medium species tree (30' to 50' at maturity) 1 New large species tree (50' or more at maturity) 2 TREE CREDITS PROPOSED: 130 76 50 35 29 12 17 12 6 4 2211 520 380 300 245 232 108 170 132 72 52 0 0 0 DocuSign Envelope ID: 8DC95E5E-DFD2-4FC3-AECA-A837B4E4B02A rentonwa.gov/permitcenter | planningcustomerservice@rentonwa.gov | 425-430-7294 10/6/2022 Page 3 of 3 TREE RETENTION AND CREDIT WORKSHEET TREE REPLACEMENT JUSTIFICATION Replacement may be authorized as an alternative to 30% retention provided the removal is the minimum necessary to accomplish the desired purpose and provided the proposal meets one of the following options: a. There are special circumstances related to the size, shape, topography, location, or surroundings of the subject property; or b. The strict application of the code would prevent reasonable use of property; or c. The strict application of the code would prevent compliance with minimum density requirements of the zone; or d. The project is a short plat with four (4) or fewer lots. Please attach a written justification demonstrating compliance with the requirements and criteria as descripted above. TREE REPLACEMENT QUANTITY Tree replacement quantity is determined based on the credit value of the trees proposed for removal. Larger, higher priority trees shall be used for calculation of tree replacement. Identify the quantity of each tree requested to be removed in lieu of 30% retention, based on tree size. List the identification number of each tree, as indicated in the arborist report. TREE SIZE TREE CREDITS TREE QUANTITY TREE INDENTIFICATION # TOTAL TREE CREDITS Tree 37” caliper + 13 Tree 33 – 36” caliper 12 Tree 29 – 32” caliper 11 Tree 25 – 28” caliper 10 Tree 22 – 24” caliper 9 Tree 19 – 21” caliper 8 Tree 16 – 18” caliper 7 Tree 12 – 15” caliper 6 Tree 10 – 12” caliper 5 Tree 6 – 9” caliper 4 REPLACEMENT CREDITS REQUIRED: TREE REPLACEMENT PLANTING Identify the quantity of proposed new replacement trees (minimum size of 2-inch caliper). The total replacement credits proposed should be equal to or greater than the replacement credits required, as shown in the previous section. TREE SIZE TREE CREDITS TREE QUANTITY TOTAL TREE CREDITS New small species tree (30' or less at maturity) 0.25 New medium species tree (30' to 50' at maturity) 1 New large species tree (50' or more at maturity) 2 REPLACEMENT CREDITS PROPOSED: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DocuSign Envelope ID: 8DC95E5E-DFD2-4FC3-AECA-A837B4E4B02A New Life Church Tree Retention Memo Washington Forestry Consultants, Inc. Page 5 Attachment 3. Critical Areas Stand Summary Reports DocuSign Envelope ID: 8DC95E5E-DFD2-4FC3-AECA-A837B4E4B02A New Life Church Tree Retention Memo Washington Forestry Consultants, Inc. Page 6 DocuSign Envelope ID: 8DC95E5E-DFD2-4FC3-AECA-A837B4E4B02A