Loading...
HomeMy WebLinkAboutEx04_Arborist_Report1 | P a g e December 10, 2021 David Wu David Wu Design 14632-14th Ave SE Mill Creek, WA 98042 And Schwin Chaosilapakul Patrick Harron & Assc. 14900 Interurban Ave, S., Suite 279 Seattle, WA 98168 Cc: Glen Takagi Glenco1029@earthlink.net Re: Tree Assessment, 1157 Queen Ave NE, Renton, WA Dear Mr. Wu and Mr. Chaosilapakul and Mr. Takagi: At your request I have inspected the above referenced property and prepared a report of trees on-site and those off-site potentially affected by your development plan per City of Renton requirements (RMC 4-8 120). Site Description: The subject property is to be divided into two lots (A and B) per King County Recording Number 9802099012: A: 7,287 net square feet: 0.167 acres B: 7,273 net square feet: 0.167 acres Dedication to City: 2,615 net square feet: 0.06 acres The parcels are nearly level and are vacant. DocuSign Envelope ID: B58AD446-584F-46BF-8420-90761B7E491E Shum Project 17723-10th Pl SE, Renton, Tree Assessment 2 | P a g e Methodology: I examined the trees to the standards of the International Society of Arboriculture (ISA) level 2 TRAQ assessment. (Tree Risk Assessment Qualified) TRAQ Level 2 Assessment • Locate and Identify Subject Trees • Assess Tree Health, Structural Issues --Vigor • Inspect: ocular, mallet, probes etc. • Record Observations: defects, site conditions, growth rates • Determine the Likelihood and consequences of failure • Determine Level of Risk of Failure • Assess Long Term Viability Findings: Individual tree data and locations are found in the attachments. The following summarizes that data. All trees were found to be viable except No. 12 due to its being suppressed, however it does not present a high hazard. It is included in the tables. Table 1 - Tree Summary Lot Total Significant Trees Landmark Trees Trees to be removed Landmark Trees to be Removed Trees to be retained A 1 0 0 0 1 B 2 1 2 1 1 Dedication 8 3 6 3 5 Discussion: Plans for the site were prepared by the client. Refer to City of Renton Code 4-4-130 Tree Retention and Land Clearing Regulations. The total area is 0.394 acre or 17,174 square feet. The Tree Retention Worksheets required by the City are attached and the required Tree Density Table is provided following. A minimum of two significant trees are required per 5,000 square feet of lot area. DocuSign Envelope ID: B58AD446-584F-46BF-8420-90761B7E491E Shum Project 17723-10th Pl SE, Renton, Tree Assessment 3 | P a g e Dedication to Pierce County: 0.60 ac. 2,615 square feet Lot A: 0.167 ac., (7,287 square feet/5,000 x 2) = 3 trees required Lot B: 0.167 ac., (7,273 square feet/5,000 x 2) = 3 trees required Table 2- Tree Density Table Lot Lot Size Min Trees Required New Trees Retained Trees Compliant A 7,287 sq 3 2@2” caliper 1 Yes B 7,273 sq' 3 3 at 2" caliper 0 Yes Planting three trees each on lots A and B as required in City of Renton Code will bring the tree density up to compliance. Site Development will result in the following impacts to the retained trees. Removals are shown for reference but it is noted that two landmark trees are planned for removal on each lot. Landmark trees are the highest priority for retention. Impacts to residual trees are for sidewalk and driveway installation with minor excavation requirements and porous surfacing if possible. DocuSign Envelope ID: B58AD446-584F-46BF-8420-90761B7E491E Shum Project 17723-10th Pl SE, Renton, Tree Assessment 4 | P a g e Table 3- Root Zone Impacts Root Zone Impacts: • None; Excavation and fill are beyond the Critical Root Zone • Minor: Excavation and fill will affect less than 15-percent of the Critical Root Zone • Moderate: Excavation and fill will affect less than 30-percent of the Critical Root Zone with depths of less than 12-inches if possible • Significant: Excavation and fill exceed the above limits: Tree not recommended for retention. Landmark trees are the highest priority for retention as described in the Code excerpt following. This is particularly applicable to tree No. 1 but also No. 6, 7 and 9 all of which are planned for removal. Removal approvals will require an approved Routine Vegetation Management Permit or a Land Development Permit. 4-4-130 TREE RETENTION AND LAND CLEARING REGULATIONS 6. Removal of Landmark Tree: The removal of a landmark tree (a tree with a caliper of thirty inches (30") or greater) is prohibited without an Tree No.Species Diameter (inches) Defined Root Zone (ft) Tree Face to Incursion(ft)Incursion Type Impact 3 Bigleaf maple 9 9 19 Building roofline None 1 Pacific Madrone 52 52 2 Smoke Tree 13 13 4 Douglas-fir 30 30 13 Concrete sidewalk Minor 5 Douglas-fir 25 25 13 Concrete sidewalk Minor 6 Douglas-fir 32 32 7 Douglas-fir 31 8 Douglas-fir 26 13 Concrete sidewalk Minor 9 Douglas-fir 31 10 Douglas-fir 16 11 Douglas-fir 22 12 Douglas-fir 6 A Douglas-fir 19 13 11 Concrete sidewalk Minor A Douglas-fir 19 13 7 Driveway Moderate B Dogwood 15 14 18 Concrete sidewalk Minor B Dogwood 15 14 15 Driveway Minor C Douglas-fir 30 24 12 Concrete sidewalk Moderate To be Removed Lot A To be Removed To be Removed To be Removed To Be Removed To Be Removed To Be Removed To Be Removed Off Site Lot B DocuSign Envelope ID: B58AD446-584F-46BF-8420-90761B7E491E Shum Project 17723-10th Pl SE, Renton, Tree Assessment 5 | P a g e approved Routine Vegetation Management Permit or a Land Development Permit. 2. Routine Vegetation Management Permit Required for the Following Activities: d. Removal of Landmark Tree: A Land Development Permit or Routine Vegetation Management Permit, which explicitly approves the removal of a landmark tree, as defined by RMC 4-11-200, Definitions T, from any property. Replacement trees are required if the minimum tree density for the subject property is not maintained upon removal of the tree. Removal of a landmark tree may be granted for situations where: i. The tree is determined to be a dangerous tree; or ii. The tree is causing obvious physical damage to structures including but not limited to building foundations, driveways or parking lots, and for which no reasonable alternative to tree removal exists. Routine maintenance of roofs that is required due to leaf fall does not constitute obvious physical damage to structures; or iii. Removal of tree(s) to provide solar access to buildings incorporating active solar devices. Windows are solar devices only when they are south-facing and include special storage elements to distribute heat energy; or iv. The Administrator determines the removal is necessary to achieve a specific and articulable purpose or goal of this Title. Tree Protections for the off-site trees to be retained and protected: Tree protection regulations are described in the following City of Renton Code excerpt. 9. Protection Measures During Construction: Protection measures in this subsection shall apply for all trees that are to be retained on site and off site. Off-site trees containing drip lines that encroach onto the site under construction shall be considered protected trees unless it is determined the DocuSign Envelope ID: B58AD446-584F-46BF-8420-90761B7E491E Shum Project 17723-10th Pl SE, Renton, Tree Assessment 6 | P a g e abutting property owner is in compliance with subsection C of this Section, Allowed Tree Removal Activities. All of the following tree protection measures shall apply: a. Construction Storage Prohibited: The applicant may not fill, excavate, stack or store any equipment, dispose of any materials, supplies or fluids, 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. b. Fenced Protection Area Required: Prior to development activities, the applicant shall erect and maintain six-foot (6') high chain link temporary construction fencing around the drip lines of all retained trees or at a distance surrounding the tree equal to one and one - quarter feet (1-1/4') for every one inch (1") of trunk caliper, whichever is greater, or along the perimeter of a tree protection tract. Placards shall be placed on fencing every fifty feet (50') indicating the words, “NO TRESPASSING – Protected Trees,” or on each side of the fencing if less than fifty feet (50'). Site access to individually protected trees or groups of trees shall be fenced and signed. Individual trees shall be fenced on four (4) sides. In addition, the applicant shall provide supervision whenever equipment or trucks are moving near trees. c. Protection from Grade Changes: If the grade level adjoining to a tree to be retained is to be raised, the applicant shall construct a dry rock wall or rock well around the tree. The diameter of this wall or well must be equal to the tree’s drip line. d. Impervious Surfaces Prohibited within the Drip Line: The applicant may not install impervious surface material within the area defined by the drip line of any tree to be retained, unless otherwise approved by the City. (Ord. 5958, 12-9-2019) e. Restrictions on Grading within the Drip Lines of Retained Trees: The grade level around any tree to be retained may not be lowered within the greater of the following areas: (i) the area defined DocuSign Envelope ID: B58AD446-584F-46BF-8420-90761B7E491E Shum Project 17723-10th Pl SE, Renton, Tree Assessment 7 | P a g e by the drip line of the tree, or (ii) an area around the tree equal to one and one-half feet (1-1/2') in diameter for each one inch (1") of tree caliper. A larger tree protection zone based on tree size, species, soil, or other conditions may be required. (Ord. 5676, 12-3-2012) f. Mulch Layer Required: All areas within the required fencing shall be covered completely and evenly with a minimum of three inches (3") of bark mulch prior to installation of the protective fencing. Exceptions may be approved if the mulch will adversely affect protected ground cover plants. (Ord. 5676, 12-3-2012) g. Monitoring Required during Construction: The applicant shall retain a certified arborist or licensed landscape architect to ensure trees are protected from development activities and/or to prune branches and roots, fertilize, and water as appropriate for any trees and ground cover that are to be retained. h. Alternative Protection: Alternative safeguards may be used if determined to provide equal or greater tree protection. (Ord. 5676, 12- 3-2012; Ord. 5841, 6-12-2017) Respectfully Submitted, Tom Hanson ISA Certification No. 23136 Pacific Northwest Chapter ISA No. PN0426A Tree Risk Assessment Qualified 1/22/2026 RCA No. 499 DocuSign Envelope ID: B58AD446-584F-46BF-8420-90761B7E491E Date: Tree # DBH Height Crown Ratio Critical Root Zone Radius Root Zone Inner Radius Viable Tree Assessment Dripline(ft)Species Project - 2021-12412/9/2021Site: Shum Property, 17723 110th Pl. SE, Renton Vigor Common Scientific (inches)(feet) (%)N S E W (feet)(feet)Health Structure Status Disposition per client Comments 3 Bigleaf maple Acer macrophyllum 8.9 25 60 17 0 17 17 9 4 Good Good Yes Sweep north 1 Pacific madrone Arubutus menziesii 51.5 90 80 32 32 32 32 52 26 Good Good Yes Landmark Remove 2 Smoke tree Cotinus obovatus 12.6 50 80 16 16 16 16 13 6 Good Fair Yes Remove 12" decay cavity 4 Douglas-fir Psuedotsuga menziesii 29.5 90 90 12 20 12 25 30 15 Good Good Yes large limb drop 5 Douglas-fir Psuedotsuga menziesii 25.3 96 90 15 8 13 28 25 13 Good Good Yes large limb drop 6 Douglas-fir Psuedotsuga menziesii 31.8 110 90 10 15 22 26 32 16 Good Good Yes Landmark Remove large limb drop 7 Douglas-fir Psuedotsuga menziesii 30.5 105 90 5 8 18 28 31 15 Good Good Yes Landmark Remove large limb drop 8 Douglas-fir Psuedotsuga menziesii 26.3 105 90 12 6 16 25 26 13 Good Good Yes large limb drop 9 Douglas-fir Psuedotsuga menziesii 30.6 105 80 14 18 22 24 31 15 Good Good Yes Landmark Remove large limb drop 10 Douglas-fir Psuedotsuga menziesii 15.8 90 80 4 4 12 16 16 8 Good Good Yes Remove 11 Douglas-fir Psuedotsuga menziesii 21.9 100 80 14 10 16 19 22 11 Good Good Yes Remove large limb drop 12 Douglas-fir Psuedotsuga menziesii 6.3 30 80 12 5 5 4 6 3 Fair Fair No Suppressed On Site--Lot A On site Lot B Off Site DocuSign Envelope ID: B58AD446-584F-46BF-8420-90761B7E491E 30.02'30.02'NE 12TH STREET N87°59'46"W 2,625.71'(M)(R1)210.16'210.16'N00°15'00"W 240.18'S00°15'59"E 240.18'1,506.81'(C)(R1) 134.07'(C)(R1) W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D) FOUND PUNCH ON 1 1/2" BRASS DISK IN IN CASE DOWN 0.7' 08-30-21 UNION AVE. NEFOUND 1/8" PIN IN CONC MON IN CASE DOWN 1.5' 08-30-21MONROE AVE. NE805.92'(C)(R1) FOUND TACK IN CONC MON IN CASE DOWN 2.1' 08-30-21 MONROE AVE. NE178.91'(R1) 178.92'(M) TREE CANOPY/DRIP LINE FENCE LINE (TYPE AS NOTED)x BUILDING LINE TELEPHONE RISERTJR MONUMENT (FOUND AS NOTED) SIGN DECIDUOUS TREE CONIFEROUS TREE WATER VALVE FIRE HYDRANT HOSE BIB STORM DRAIN MANHOLE STORM CATCH BASIN SEWER MANHOLE POWER POLE/LIGHT POLE GUY ANCHOR GAS METER S D GM WV POWER OVERHEAD LINEOP SANITARY SEWER PIPESS STORM DRAIN PIPESD CONCRETE PAVING ASPHALT PAVING REBAR (FOUND AS NOTED) POST OR BOLLARD GAS VALVEGV F FIR TREE M MAPLE TREE LEGEND LEGEND (C) (M) P/L CLF CALCULATED DIMENSION MEASURED DIMENSION PROPERTY LINE CHAIN LINK FENCE WATER LINE PER RECORD DATAW(D)xxxxxxxxxxxxxxxxxxxxxxxx x x x x x x x x xxxxxxxxxxxxxxxxxxxN00°15'00"W 20.02'N87°59'46"W 20.02'QUEEN AVEWV WV 18"F 20"F 14"F 30"F 26"F 30"F S 32"F 26"F 30"F 60"MA 12"DEC 16"DEC 30"F 10"M WV TJR WMS 8"DEC(2) FOUND 1/2" REBAR AND CAP AT GRADE "MHT 9470" E. 0.1' 09-02-21 FOUND 1/2" REBAR AND CAP IN 5" X 5" CONC "MHT 9470" E. 0.1' 09-02-21 FOUND BARE 1/4" REBAR W. 0.5' 09-02-21 xxOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOP5' TALL CLF x5' TALL CLF VERTICAL CURB5' TALL CLFCONC SLAB TREE CANOPY LINE (TYP) TREE CANOPY LINE (TYP) TREE CANOPY LINE (TYP)5' TALL CLFGATE5' TALL CLFCEDAR HEDGE 430 43243 2 432OPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOP ~PIERCE AVE NEPARCEL A KING COUNTY BOUNDARY LINE ADJUSTMENT REC.NO. 9802099012 PARCEL B SSMH TOP 432.03 IE 427.63 (8" PVC (OUT-N) BOTTOM STRUCTURE ELEV. 427.66 NO CHANNEL SSMH TOP 434.25 8" PVC (W), 8" CONC (N), 8" CONC (S) CENTER CHANNEL ELEV. 425.43 CATCH BASIN TOP 433.33 6" CONC IE 432.30 (IN-W) 8" CMP IE 431.28 (OUT-S)SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS~SD SD SD SDSDSDSDTBM 1 TOP REBAR/CAP EL = 434.36'430.5429.8432.7430.1430.6432.1432.5432.46432.17432.9 2433.15433.82434.04433.84433.41433.39433.51432.44430. 0431.3433.4434.7432.6431.6429.7430.3431.7430.3430.3432.6432.0N87°59'50"W 134.14'(C) 134.13'(R1) N87°59'46"W 114.15'S00°15'59"E 131.11'S00°15'00"E 111.09'430 4324344344344304 3 0 432430430 5' TALL CLF0.5' 0.6' FENCE CROSSES P/L FENCE 0.1' S. OF P/LFENCE 0.2' S. OF P/L 1.8' CONC DRIVECONC WALKTBM 2 TOP REBAR/CAP EL = 430.64' 4.8' 30.00' 30.00'W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D) CATCH BASIN TOP 433.61 6" CONC IE 432.30 (OUT-E)SSSS~30.00' 30.00' 3.3' 10.7' 9.8'REVISIONOFSHEET NO.DRAWING FILE:PROJECT NUMBER:NUMBER: SCALE: DATE:DESIGN:DRAWN:CHECKED: REVISIONS:APPD.SV-TP-OWDV01880001.dwgSave Date: Plot Date: 9/21/2021 2:46 PM 9/24/2021 10:35 AM By: Arj P:\O\OWDV01880001\0400CAD\SV\BASES\SV-TP-OWDV01880001.dwg Aaron JenningsBy: File: POR. NW 1/4, NE 1/4, SEC. 9, TWP. 23 N., RGE. 5 E., W.M. TOPOGRAPHIC SURVEY FOR SHUM PROPERTY HOI-FUNG SHUM 17723 110TH PLACE SE, RENTON, WA 98055SEPTEMBER 24, 2021ARJ1"=10'OWDV0188-0000111® 20300 Woodinville Snohomish Rd. NE, Ste A Woodinville Washington 98072 Phone: 425.415.2000 NORTH 1. INSTRUMENTATION FOR THIS SURVEY WAS A TRIMBLE TOTAL STATION. PROCEDURES USED IN THIS SURVEY WERE FIELD TRAVERSE, MEETING OR EXCEEDING STANDARDS SET BY WAC 332-130-090. 2. PRIMARY CONTROL POINTS AND ACCESSIBLE MONUMENT POSITIONS WERE FIELD MEASURED UTILIZING GLOBAL POSITIONING SYSTEM (GPS) SURVEY TECHNIQUES USING TRIMBLE EQUIPMENT. MONUMENT POSITIONS THAT WERE NOT DIRECTLY OBSERVED USING GPS SURVEY TECHNIQUES WERE TIED INTO THE CONTROL POINTS UTILIZING TRIMBLE ELECTRONIC TOTAL STATIONS FOR THE MEASUREMENT OF BOTH ANGLES AND DISTANCES. THIS SURVEY MEETS OR EXCEEDS THE STANDARDS SET BY WAC 332-130-090. 3. THE INFORMATION DEPICTED ON THIS MAP REPRESENTS THE RESULTS OF A SURVEY MADE ON SEPTEMBER 3, 2021 AND CAN ONLY BE CONSIDERED AS INDICATING THE GENERAL CONDITION EXISTING AT THAT TIME. 4. NO EASEMENTS, RESTRICTIONS OR RESERVATION OF RECORD WHICH WOULD BE DISCLOSED BY TITLE REPORT ARE SHOWN. 5. CONTOUR INTERVAL: 2 FOOT PARCEL A OF KING COUNTY BOUNDARY LINE ADJUSTMENT, RECORDED UNDER RECORDING NO. 9802099012, RECORDS OF KING COUNTY, WASHINGTON. NAVD 88 BASED ON GPS OBSERVATIONS. SITE BENCH MARKS: TBM 1: TOP OF REBAR AND CAP, SET IN ASPH DRIVE, 46'± SW OF SW CORNER OF SUBJECT PROPERTY ON SITE AS SHOWN ELEVATION = 434.36' TBM 2: TOP OF REBAR AND CAP, SET IN MIDDLE OF SUBJECT PROPERTY AS SHOWN ELEVATION = 430.64' EROF GI E OY DU Call: TOLL FREE 1-800-424-5555CLLABCALL BEFORE YOU DIG 1. KING COUNTY BOUNDARY LINE ADJUSTMENT, RECORDED UNDER RECORDING NO. 9802099012, RECORDS OF KING COUNTY, WASHINGTON. 09-24-21 1 2 3 4 5 6 7 8 9 11 10 12 A B C Tree Locations DocuSign Envelope ID: B58AD446-584F-46BF-8420-90761B7E491E xxxxxxx x x x x x x x xxN87°59'46"W 114.15'N00°15'00"W 20.02'N87°59'46"W 20.02'111.09'131.11'WV WV 24"F 18"F 26"F S 26"F 30"F 16"DEC 30"F 10"M WV TJR WMS 8"DEC(2) FOUND 1/2" REBAR AND CAP AT GRADE "MHT 9470" E. 0.1' 09-02-21 FOUND 1/2" REBAR AND CAP IN 5" X 5" CONC "MHT 9470" E. 0.1' 09-02-21 FOUND BARE 1/4" REBAR W. 0.5' 09-02-21 xxOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOP OP OP OP OP OP OP OP 5' TALL CLF x5' TALL CLF VERTICAL CURBSHED ON CONC SLAB TREE CANOPY LINE (TYP) TREE CANOPY LINE (TYP)5' TALL CLFGATE5' TALL CLFCEDAR HEDGE 430 43243 2 432OPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOPOP~SSMH TOP 432.03 IE 427.63 (8" PVC (OUT-N) BOTTOM STRUCTURE ELEV. 427.66 NO CHANNEL SSMH TOP 434.25 8" PVC (W), 8" CONC (N), 8" CONC (S) CENTER CHANNEL ELEV. 425.43 CATCH BASIN TOP 433.61 6" CONC IE 432.30 (OUT-E) CATCH BASIN TOP 433.33 6" CONC IE 432.30 (IN-W) 8" CMP IE 431.28 (OUT-S)SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS~SD SD SD SDSDSD430.5429.8432.7430.3430.1430.6432.1432.5432.46432.17432.92433.15433.82434.04433.84433.41433.39433.51432.44430.0431.3433.4434.7432.6431.6429.7430.3431.7430.3430.3432.6432.1432.0N87°59'50"W 134.14' FENCE 0.5' W. OF P/L 1.5'W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)W(D)SSSS~FENCE CROSSES P/L FENCE 0.2' S. OF P/L TBM 1 TOP REBAR/CAP EL = 434.36' FENCE CROSSES P/L FENCE 0.2' S. OF P/L TBM 2 TOP REBAR/CAP EL = 430.64'PIERCE AVE NELOT B LOT A TREE CANOPY LINE (TYP)5' TALL CLFQUEEN AVE NEDEMOLITION & TESCPLANC2.0 3 TESC LEGEND: DEMOLITION & TESC PLAN DEMOLITION & TESC NOTES: DEMOLITION & TESC CALLOUTS: OF SCALE: DATE: DRAWING NO. CHK. BY:DWN. BY: PROJ. NO.DSN. BY:R#DATEBYDESCRIPTIONCivil Engineering & PlanningWeb : patrickharron.com14900 Interurban Ave. S, Suite 279, Seattle, WA 98168Phone : 206.674.4659 21807 SC SC 7SHUM RESIDENCEHOI-FUNG SHUM1157 QUEEN AVE NERENTON, WA 98056SHUM RESIDENCE NW 1/4 , NE 1/4, SEC 09, T 23 N, R 05 E, W. M.CITY OF RENTON - BUILDING PERMITCC AS SHOWN 12/10/21 CALL 48 HOURS 811 BEFORE YOU DIG 0 10 20 N DocuSign Envelope ID: B58AD446-584F-46BF-8420-90761B7E491E