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Home My WebLink AboutR-396425RT to M O we TF a TREE RETENTION PLAN Print Form Reset Form Save Form DEPARTMENTCOMMUNITY Ren on O AND ECONOMICIC DEVELOPMENT TREE RETENTION WORKSHEET Planning Division 1055 South Grady Way -Renton, WA 98057 Phone: 425-430-7200 1 www.rentonwa.gov 1. Total number of trees over 6" diameter', or alder or cottonwood trees at least 8" in diameter on project site 2. Deductions: Certain trees are excluded from the retention calculation: Trees that are dangerous Trees in proposed public streets Trees in proposed private access easements/tracts Trees in critical areas3 and buffers Total number of excluded trees: 45 trees 0 trees 0 trees 0 trees 0 trees 0 trees 3. Subtract line 2 from line 1: 45 trees 4. Next, to determine the number of trees that must be retained 4, multiply line 3 by: 0.3 in zones RC, R-1, R-4, R-6 or R-8 IF line 6 is zero or less, stop here. No replacement trees are required) 0.2 in all other residential zones trees 0.1 in all commercial and industrial zones 4.5 trees 5. List the number of 6" in diameter, or alder or cottonwood trees inches over 8" in diameter that you are proposings to retain: 0 trees 6. Subtract line 5 from line 4 for trees to be replaced: IF line 6 is zero or less, stop here. No replacement trees are required) 5 trees 7. Multiply line 6 by 12" for number of required replacement Inches: 60 inches 8. Proposed size of trees to meet additional planting requirement: (Minimum 2" caliper trees required for replacement otherwise enter a) 3" & 4" inches per tree 9. Divide line 7 by line 8 for number of replacement trees`: (If remainder Is .5 or greater, round up to the next whole number) 18 trees 1 Measured at 4.5' above grade. 2 A tree certified, in a written report, as dead, terminally diseased, damaged, or otherwise dangerous to persons or property by a licensed landscape architect, or certified arborist, and approved by the City. a Critical areas, such as wetlands, streams, floodplain and protected slopes, are defined in RMC 4-3-050. 4 Count only those trees to be retained outside of critical areas and buffers. a The City may require modification of the tree retention plan to ensure retention of the maximum number of trees per RMC 4.4-13011-]a. a When the required number of protected trees cannot be retained, replacement trees, with at least a two-inch IT') caliper or an evergreen at least six feet (6') tall, shall be planned. See RMC 4-4-130.H.1.e.(ii) for prohibited types of replacement trees. 1 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planf ing\Tree Retention Workshee .docx 08/2015 NOTE: SEE SHEET L-2 FOR REPLACEMENT TREE SPECIES, CALIPER AND QUANTITY Pretectlon Measures During Construction: Protection measures In this subsection shall apply for all trees that are to be retained All of the following Vee pmtectlon measures shall apply. a. Construdion Storage Prohili The applicant may not 91, excavate, stack or store any equipment, dispose of any materials, supplies or rules, operate any equipment. Install Impervious surfaces, or compact the earth In any way within the area defined by the drip line of any tree to be retained. In. Fenced Protection Area Required: Prior to development activities, the applicant shall erect and maintain slx-foot (9) high chain link temporary construction fencing around Me tltlp Imes of all retained trees or at a distance surrounding the tree equal to one and onepuaner feet (1.25') for every one Inch L ) of trunk caliper, whichever Is greater, or along the perimeter of a tree protection tract. Placards shall be placed on fencing every flog feel (50) Indicating the words, "NO TRESPASSING—Protected Trees; or on each side of the fencing Uses than My met (50'6 Site access to Individually promcmtl trees or groups of trees shall be fenced and signed. Individual trees shall be fenced on four (4) sides. In addMbn, the applicant steal provide supervmbn whenever equipment or trucks are moving near trees. c. Protection from Grade Changes: If Me grade level adjoining to a tree to be retained is to be mised, the applicant shall construct a dry puck well or rock well around the tree. The diameter of this wall or wet mud be equal to the tree's drip Inc. d Impervious Surfaces Prohlbged within Me Drip Una: The applicant may not III Impervious surface material Within the area defined by the drip line of any tree to be regained. e. Restrictions on Grading within the Drip Lines of Retained Trees: The grade level among any Vee he be pushed may not be lowered within the greater of Me following areas: (b the area defined by the tltlp line of Me tree, or (II) an area round the tree equal to one and one-half feet D -1R') In diameter for each one Inch IT) of tree caliper. A larger tree protection zone based on tree size, species, cols, or other condnons may be required (Ord. 5676,1232012) C Mulch Lever Required: All areas within the required fencing shall be covered completely and evenly with a minimum of three inches Or) of wood chip mulch prior to installation of the protective fencing. Excaptions may W approved 9the mulch will adversely affect protected ground cover plans. (Ord. 55741232012) g. Monaoring Required during Construction: The applicant shall retain a canned shared or licensed landscape architect to ensure trees are protected from development activities and/or to prune branches and open, rootlike, and Water as appropriate for shortness and ground cover Mat are to be retained. In. Alternative Production: Almrnadve safeguards may be used If determined to provide equal or greater tree promotion. (Ord 5676,1232012) TREE PROTECTION DETAIL 1-=30' reli 'ris'taman � CITY OF Z1N � RENTON sloe ZTW DATUM ay ii I w w I Planning/Ruaditq/Public Works Dept. NO. REVISION BY DATE MPR "d®s STATE OF WASHINGTON REGISTERED LANDSCAPE ARSHITECT JEFF M. VARLET CERTIFICATE No. 774 R-3964-25 IN COMPLIANCE WITH CITY OF RENTON STANDARDS JRRENT PLANNING cclose 01/22/2018 TREE RETENTION PLAN UW MEDICINE - VALLEY MEDICAL CENTER MEDICAL OFFICE BUILDING EXPANSION 400 SOUTH 43RD STREET RENTON, WASHINGTON 98055