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REVIEWED PLN_BLD2023-0562+STREAM BUFFER IMPACT REPORT+4.14.2023_4.35.37_PM+3484979Altmann Oliver Associates, LLC AOA PO Box 578 Carnation, WA 98014 Office (425) 333-4535 BLD2023-0562 RECEIVED 5123/23 February 15, 2023 CITY OF EDMONDS DEVELOPMENT SERVICES DEPARTMENT Tracy Heims tracy@crystalfalls.care Fax (425) 333-4509 Environmental Planning & Landscape Architecture F-T97TQi ,119111 SUBJECT: Stream Buffer Impacts and Mitigation for Crystal Falls Addition 9815 Cherry Street, Parcel 00475600000400, Edmonds, WA Dear Tracy: On May 25, 2022 1 conducted stream and wetland reconnaissance on the subject property utilizing the methodology outlined in the May 2010 Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region (Version 2.0). The purpose of the reconnaissance was to identify critical areas on and adjacent to the site and to assess buffer impacts and required mitigation associated with the proposed expansion of your existing structure. 1.0 EXISTING CRITICAL AREAS Although no wetlands are located on or adjacent to the site, Fruitdale Creek and a small associated rock -lined pond flows from southeast to northwest through the western portion of the site. According to a previous critical area review (CRA20180174), Fruitdale Creek was approved by the City on a downstream site as a perennial non-anadromous fish bearing stream (Type F Fish and Wildlife Habitat Conservation Area) and this classification is appropriate for the site. Non anadromous potential fish bearing streams require a standard 75-foot buffer per EMC 23.90.040.D.1.d. The 75-foot standard buffer on the site extends through most of the existing structure on the property. All non -developed buffer areas adjacent the stream currently consist of landscaped yard and ornamental plantings and there are no intact native plant communities within the existing riparian corridor of the stream. In addition, no species of local importance, priority species, or endangered, threatened, sensitive, or candidate species were identified having a primary association with habitat on or adjacent to the project area. 2.0 PROPOSED PROJECT BUFFER MODIFICATION The proposed project consists of a small addition (168 s.f.), deck, (84 s.f.), and associated new path and steps (31 s.f.) for a total buffer modification of 283 s.f. Since Tracy Heims February 15, 2023 Page 2 of 5 the existing buffer extends almost all the way through the existing structure it is not possible to avoid the buffer modification and the addition has been designed to be the minimum necessary to meet the goal of the project. Furthermore, all buffer modification areas are currently existing yard and deck areas that do not provide a functional benefit to Fruitdale Creek. Additions to existing structures located within a stream buffer are regulated per EMC 23.90.040. D.4. 4. Additions to Structures Existing within Stream Buffers. a. Additions to legally constructed structures existing within stream buffers that increase the footprint of development or impervious surfacing shall be permitted consistent with the development standards of this chapter (ECDC 23.90.030 and this section); provided, that a buffer enhancement plan is provided to mitigate for impacts consistent with this title; and provided, that all impacts from temporary disturbances within the critical area buffer shall be addressed through use of best management plans and buffer enhancement plantings during and following construction of the allowed alteration. Provisions for standard stream buffers, stream buffer averaging with enhancement, and buffer reductions through enhancement require applicants to locate such additions in accordance with the following sequencing: Outside of the standard stream buffer; The standard stream buffer extends throughout most of the existing structure and it is not possible to develop the addition in the required location outside of the buffer. ii. Outside of a stream buffer averaged (with enhancement) per subsection (D)(3) of this section; There is no viable buffer replacement on the site and buffer averaging would not grant sufficient relief for the addition in the required location. iii. Outside of a stream buffer reduced (with enhancement) per subsection (D)(2) of this section; The maximum allowed buffer reduction in this section is 25% of the standard buffer (i.e., down to 56.25 feet) and this reduction also does not grant sufficient relief for the addition in the required location. iv. Outside of the inner 25 percent of the standard stream buffer width with no more than 300 square feet of structure addition footprint within the inner 50 percent of the standard stream buffer width; provided, that enhancement is provided at a minimum three -to -one (3:1) ratio (enhancement -to -impact); or No portion of the expansion would occur within the inner 25 percent of the standard 75- foot stream buffer (i.e., 18.75 feet). In addition, the buffer modification is a total of 283 s.f. and is below the 300 square foot threshold. A buffer enhancement plan has been prepared to enhance 849 s.f. of degraded buffer area on the site. Tracy Heims February 15, 2023 Page 3 of 5 V. Outside of the inner 25 percent of the standard stream buffer width with no more than 500 square feet of new footprint within the inner 50 percent of the standard stream buffer width; provided, that enhancement is provided at a minimum five -to -one (5:1) ratio (enhancement -to -impact), and that storm water low impact development (LID) techniques or other measures that enhance existing buffer condition are included as part of the stream buffer enhancement plan. Not applicable. 3.0 PROPOSED BUFFER MITIGATION Mitigation for the 283 s.f. of buffer modification will occur through the enhancement of 849 s.f. (3:1 enhancement to impact ratio) of degraded buffer areas that currently consist of yard, deck, and hardscape that do not provide a functional benefit to the stream. Mitigation will consist of removing existing lawn, deck, and hardscape and re- planting with a wide variety of native trees, shrubs, and groundcover to increase the plant species and structural diversity within the buffer. 3.1 Goal, Objectives, and Performance Standards for Mitigation Area The primary goal of the mitigation plan is to increase the habitat function of the enhanced buffer. To meet this goal, the following objectives and performance standards have been incorporated into the design of the plan: Objective A: Increase the structural and plant species diversity within the mitigation area. Performance Standard: There will be 100% survival of all woody planted species throughout the mitigation area at the end of the first year of planting. For Years 2-5, success will be based on an 80% survival rate or similar number of recolonized native woody plants. Areal coverage of plantings or native re -colonized woody species will be at least 15% at Year 1, 25% at Year 2, 30% at Year 3, 40% at Year 4, and 50% at Year 5. Objective B: Limit the amount of invasive and exotic species within the mitigation area. Performance Standard: After construction and following every monitoring event for a period of five years, exotic and invasive plant species will be maintained at levels below 10% total cover in all planted areas. 3.2 Construction Management Prior to commencement of any work in the mitigation area, the clearing limits will be staked and any existing vegetation to be saved will be clearly marked. A pre - construction meeting should be held at the site to review and discuss all aspects of the project with the landscape contractor and/or owner. Tracy Heims February 15, 2023 Page 4 of 5 A consultant will supervise plan implementation during construction to ensure that objectives and specifications of the mitigation plan are met. Any necessary significant modifications to the design that occur because of unforeseen site conditions will be jointly approved by the City of Edmonds and the consultant prior to their implementation. 3.3 Monitoring Methodology The monitoring program will be conducted for a period of five years, with annual reports submitted to the City. Vegetation monitoring will include general appearance, health, mortality, colonization rates, percent cover, percent survival, volunteer plant species, and invasive weeds. Photo -points will be established from which photographs will be taken throughout the monitoring period. These photographs will document general appearance and progress in plant community establishment in the mitigation area. Review of the photos over time will provide a visual representation of success of the mitigation plan. 3.4 Maintenance Plan Maintenance will be conducted on a routine, year-round basis. Additional maintenance needs will be identified and addressed following periodic maintenance reviews. Routine removal and control of non-native and other invasive plants within the designated mitigation area shall be performed. Undesirable and weedy exotic plant species shall be maintained at levels below 10% total cover within the mitigation area during the monitoring period. Routine maintenance of planted trees and shrubs shall be performed. Measures include resetting plants to proper grades and upright positions. Tall grasses and other competitive weeds shall be weeded at the base of plants to prevent engulfment. 3.5 Contingency Plan All dead plants will be replaced with the same species or an approved substitute species that meets the goal of the mitigation plan. Plant material shall meet the same specifications as originally installed material. Replanting will not occur until after reason for failure has been identified (e.g., moisture regime, poor plant stock, disease, shade/sun conditions, wildlife damage, etc.). Replanting shall be completed under the direction of the consultant, City of Edmonds, or the owner. 3.6 As -Built Plan Following completion of construction activities, an as -built plan for the mitigation area will be provided to the City of Edmonds. The plan will identify and describe any changes in relation to the original approved plan. Tracy Heims February 15, 2023 Page 5 of 5 It is my understanding that all of the statements and conclusions presented in this report are accurate. If you have any questions regarding the proposed buffer modification or mitigation plan please give me a call. Sincerely, ALTMANN OLIVER ASSOCIATES, LLC John Altmann Ecologist Attachments "City of Edmonds map Title 41 A r• 77 - - - '^V s�--�— — t .° .. Legend Creeks Wetlands { .-'tr+'* r,-t = �'f+t=!r• 1' �' r ;,� -'" Wetlands Boundary Wetland Boundaries Not Completel Wetland Known Extents F: ' DOH Wellhead Protection Areas �., `-9i-, -' - ' • -•I . 6 Month 1 Year ` rt .i+.. . .-s,. .'ti. •i.' `.. .:` 1 '� : cS+�i •, lr h^ 5 Year 10 Year ti r Lr Buffer Zone }� . r•, %ArcSDE.GIS.STREET CENTERLINE: � •' 'fir — <all other values> . ---- ..-.�; °�4 �� 'i• - J •i ' Y7: 9; 71:7; 8 y!• r Lai9715 Sections Boundary Sections Edmonds Boundary ■ l ^ ArcSDE.GIS.PROPERTY BUILDIN( ArcSDE.GIS.STREET CENTERLINE • i y - .� r.' � ��, �: Ar- ry�-' 4`' — <all other values> R • _ Interstate Principal Arterial Minor Arterial: Collector > � r rc.•"��. - . � 1:758 Notes 0 63.15 126.3 Feet 1,128 94.0 This ma is a user generated static output from an Internet mapping site and is for P� B P pP !; reference only. Data layers that appear on this map may or may not be accurate, WGS_1984_Web _Mercator _Auxiliary -Sphere current, or otherwise reliable. © City of Edmonds THIS MAP IS NOT TO BE USED FOR DESIGN OR CONSTRUCTION N E S GRAPHIC SCALE 5 0 5 10 20 1 INCH = 10 FT. LEGEND f FOUND MONUMENT IN CASE X CHAINLINK FENCE O FOUND REBAR AS DESCRIBED WOOD FENCE • SET 5/8" X 24" IRON ROD CONCRETE WALL W/1" YELLOW PLASTIC CAP © POWER METER ROCKERY ❑O GAS METER ASPHALT SURFACE GAS VALVE ® MAILBOX CONCRETE SURFACE PMT PAD MOUNTED TRANSFORMER GRAVEL SURFACE © CABLE PEDESTAL m CABLE HANDHOLE BRICK SURFACE 0 SANITARY SEWER MANHOLE CE CEDAR D4 WATER VALVE DS DECIDUOUS FIRE HYDRANT PI PINE ® STORM DRAIN MANHOLE SP SPRUCE _SS_APPROXIMATE LOCATION SANITARY *INDICATES SEWER LINE MULTI -TRUNK SD APPROXIMATE LOCATION STORM DRAIN LINE W APPROXIMATE LOCATION UNDERGROUND WATER LINE I LEGAL DESCRIPTION I LOT 1 OF EDMONDS SHORT PLAT, AS RECORDED DECEMBER 2, 1977 UNDER RECORDING NO. 7712020288, BEING A PORTION OF LOTS 4 AND 5 OF HINDE PARK, AS PER PLAT RECORDED IN VOLUME 23 OF PLATS, PAGE 898, RECORDS OF SNOHOMISH COUNTY AUDITOR; LESS THE SOUTH 5 FEET CONVEYED TO THE CITY OF EDMONDS BY INSTRUMENT RECORDED UNDER RECORDING NO. 7704280200; SITUATE IN THE CITY OF EDMONDS, COUNTY OF SNOHOMISH, STATE OF WASHINGTON BASIS OF BEARINGS A BEARING OF N 88°33'0" E FOR THE CENTERLINE OF CHERRY STREET BASED ON FOUND MONUMENTS. I PROJECT INFORMATION I PROPERTY OWNER: TAX PARCEL NUMBER: PROJECT ADDRESS: ZONING: JURISDICTION: PARCEL ACREAGE: TRACY & AYDA HEIMS 9815 CHERY STREET EDMONDS, WA 98020 004756-000-004-00 9815 CHERY STREET EDMONDS, WA 98020 RS-12 CITY OF EDMONDS 20,533 S.F. (0.471 ACRES) AS SURVEYED GENERAL NOTES 1. THIS SURVEY WAS COMPLETED WITHOUT BENEFIT OF A CURRENT TITLE REPORT. EASEMENTS AND OTHER ENCUMBRANCES MAY EXIST ON THIS PROPERTY THAT ARE NOT SHOWN HEREON. 2. INSTRUMENTATION FOR THIS SURVEY WAS A 3-SECOND SPECTRAPRECISION FOCUS 35 TOTAL STATION AND AN EMLID REACH RS2 GPS RECEIVER. PROCEDURES USED IN THIS SURVEY MEET OR EXCEED STANDARDS SET BY WAC 332-130-090. 3. THE INFORMATION ON THIS MAP REPRESENTS THE RESULTS OF A SURVEY MADE IN JULY 2022 AND CAN ONLY BE CONSIDERED AS INDICATING THE GENERAL CONDITIONS EXISTING AT THAT TIME. 4. UTILITIES SHOWN ON THIS SURVEY ARE BASED UPON ABOVE GROUND OBSERVATIONS AND AS -BUILT PLANS WHERE AVAILABLE. ACTUAL LOCATIONS OF UNDERGROUND UTILITIES MAY VARY AND UTILITIES NOT SHOWN ON THIS SURVEY MAY EXIST ON THIS SITE. 5. ALL MONUMENTS WERE LOCATED DURING THIS SURVEY UNLESS OTHERWISE NOTED. VERTICAL DATUM & CONTOUR INTERVAL ELEVATIONS SHOWN ON THIS DRAWING WERE DERIVED FROM GPS OBSERVATION USING THE WSRN. DATUM - NAVD 88 DATUM 2.0' CONTOUR INTERVAL - THE EXPECTED VERTICAL ACCURACY IS EQUAL TO 1/2 THE CONTOUR INTERVAL OR PLUS / MINUS 1.0' FOR THIS PROJECT. FOUND 3" BRASS DISK W/ PUNCH IN CASE 07 DOWN W W SS SD SD W SS W CAP (38964) W O am O G CHERRY STREET ---- SDMH _-- RIM = 84.52' 339.89' _ SD SDS88°33'00"W 1265.98' SD -- - SD SD SD W - - W— — — — — — — — W - - - - - - - - - - - SS SS - - SS - - - - - - - - SS W SS W - SS - SS Sb SS �+I ---� ---- SD ------------ so SSMH RIM = 8 630.20' - SS_____ FOUND 3" BRASS ^ISK W/ PUNCH IN CASE 0.4' DOWN 0 0 0 t E m E E cc z M N 0) s E z 0 D) w w w a 0 W u w O W 00 _ M Q � Q 06 w o U U O u') 0 m w PROJECT NO. 22-347 D RAW N BY: MTS CHECKED BY: EFJ DATE: 7/14/2022 SHEET 1 OF 2 N E S GRAPHIC SCALE 5 0 5 10 20 1 INCH = 10 FT. LEGEND v1�k FOUND MONUMENT IN CASE X CHAINLINK FENCE O FOUND REBAR AS DESCRIBED WOOD FENCE • SET 5/8" X 24" IRON ROD CONCRETE WALL W/1" YELLOW PLASTIC CAP © POWER METER ROCKERY ❑O GAS METER ASPHALT SURFACE GAS VALVE ® MAILBOX CONCRETE SURFACE PMT PAD MOUNTED TRANSFORMER GRAVEL SURFACE © CABLE PEDESTAL m CABLE HANDHOLE BRICK SURFACE 0 SANITARY SEWER MANHOLE CE CEDAR x WATER VALVE DS DECIDUOUS FIRE HYDRANT PI PINE ® STORM DRAIN MANHOLE SP SPRUCE —SS—APPROXIMATE LOCATION SANITARY *INDICATES SEWER LINE MULTI -TRUNK SD APPROXIMATE LOCATION STORM DRAIN LINE APPROXIMATE LOCATION W UNDERGROUND WATER LINE 4 � 'a 186th PI SW rn S o~� 187th St SVI sf 188th st sW 0 SITE 0. o y 184[h Pt SW Blake Pt 190th St SW water S[ Sm � 191 st PI SW Cheny St 190thp%G � b C m m 192nd St SW o r Son", � r IvalbQ ` Slheam Ln � e11D, o, � fo?es ta r!/ N O Z v S Dy q 4• gLlow \ yL - n VICINITY MAP NTS I I I I I I I I I I I I I I I I I QP�GOO� o ;LpO o FOUND REBAR & o z CAP (PCS 37536) Os rN80"E — OFFSET 1.64' !y ON PROPERTY LINE 34.26' 0.1' EE FOUND BAR i 1 I 0.45' N 60' E o I \ i 1 � I II � 0.6' W I I. I I I \-)220p p� I QP�Gpp�O ON �`� j CA IOff, i / / / / / 0.0' N / O O 0.t' E 01TW - _ - - - I / )'QPh6� pp \\ ppN1 \JO' p0 ROOF `\ OVERHANG SHED 1 � FF = 77.7' / \ < 10.6 0.5'W \ / o � BUILDING�� • p \ GO- Q OVERHANG v� TWO STORY `v i P 0�' HOUSE RH = 107.0' `v X - / \ i � 1 I \ o 0 0 0 0 \ o ,� 0�` `✓`\ \ I PMT \ o 0 0 0 <\ - `\ I / "7�/ \ e Q Q I \ \ \ \\ II I 1 \ 005�� \r i`\\ �0/ DECK �, 1 0.8' W FOUND REBAR & 0 CAP UNDER Ao Z CONCRETE DECKco IIDGE\ \ � vv � ABOVE I DECK T `-- - DECK \ 10.0' — i I � O \ II � vv � 10' UTILITY I \ I EASEMENT PER PROPERTY\ AFN: 7712020288 CORNER FALLS IN CEDAR I \ I I POND � � Corp M \ \ MATCH SHEET2 \ \ \ LINE SHEET 1 v �FOUND REBAR \ '\ & CAP (RL) I \\ 0.12' N \ N_ W N Lo N N C O L d V c co L E m E •� � w Z M tAi N y E I z 0 z O w w- W OC O d O H U WO 04 w 00 Q U Q C,6 Lu 0 U U O Lo 0 r 00 Lu PROJECT NO. 22-347 DRAWN BY: MTS CHECKED BY: EFJ DATE: 7/14/2022 SHEET 2 OF 2 i I I , N rn rn rn Nrn ` N3 -� I -r � - I z - - zz ,i Uz l I � I i F i • _ --- P I\ / 0 V --- ------------- - ---------------------------- I I I I I I I I I I I I I I I I i O C > rn m N 0 -z O u�q)O z= z 3 rn rn n >n> 0 �n ENO D z O rn N �rn0 { -jM � � O rn Nm� m z DRAWN PROJECT Altmann Oliver Associates, LLC AOA F I C URE 1 :: OVERVIEW PLAN SCAALE 6831 POB-57/ C—ioq WA9804 Offi.(425) 3334535 F.(425) 3334509 Envi—taf HEIMS PROPERTY AS NOTED ;' aPe ci8I5 GHERRY STREET, EDMONDS, WA G18020 DATE I / Architecture PARGEL 004756-000-004-00 02-I5-2 REVISED 68 31-MIT-02-15-23. dwg PLAN LEGEND o (E) GONGRETE — — — — PROPERTY L I NE ` PATH TO REMAIN ` — • — • — STREAM/PONDS ORDINARY HIGH WATER N STREAM OHW STANDARD 75 STREAM BUFFER O >n A -75' STANDARD BUFFER / — — — ' ! (P) NEW PATH a z W ; 18.75 REDUCED BUFFER AND STEPS — — — —18.75 MINIMUM BUFFER (25%) A A O MFAGT LE&END (E) BAMBOO TBR r (E) 8'X21' HOUSE ADDITION 168 SF AND REPLANTED— GONGRETE ` ......o......00000 4 X21 DECK 84 SF REPLANTS°°°°°°°°°°°°°°°°°°°° � TBR AND �� — PATH AND STEPS 31 SF (E) IVY/BAMBOO � \ � (E) (P) 4iX21i DECK TOTAL IMPACT 283 SF (P) 8 X21 \' TBR AND PMr `WEB R H_ ADDITION MITIGATION LF-GEND \ \. REPLANTED , \ � \ , � � � (E) P\ATIO � (E) HEDGE MITIGATION (3:1 FOR 84q SF TBR�ND TBR I MPAGTS) Z \ - / REPLANTED (E) CL < z � RHODY (E) O (E) LAWN_ 000°TBR � p O oo°° \ JAPANESE — ^`� ❑°ood000r O O MAPL Cow °b W LLJ ❑❑ I DECK � � LY BRIDGE `� ABOVE Q r- y W�� (E) DEG N O W 00 I �o TBR AND z —1 EPLANTEI�LQ CK DECK N — — � � •�, � � W dJ < (E) GRAVEL TBR I (E) STEPS (E) ,IVY \ ° _ � \TBR AND (E) JAPANESE TBR - A Q��� REPLANTED MAPLE - I (E) ROCKED (E) KNOTWEED TBR BYPASS TBR GRAPHI G SGALE W j AND REPLANTED (I N FEET) U ` EDGE OF POND a M -75' STANDARD BUFFER I �� 18.75 REDUCED BUFFER \ o ��� O 5 10 15 20 30 1 a �� (E) VINGA TBR POND o 0 \ AND REPLANTED CpS� SGALE:1:10 (E) RHODY �(ET7Y \ i � a \ •T8�.. v� �` , / % � � � NOTES o .� 1. BASE INFORMATION PROVIDED BY SITE o SURVEYING, ING., 21ci23 NE IITH STREET, o SAMMAMISH, WA G0074, 425.2ci8.4412. _ LLN FLANT L I ST (SEE FIG. 4 FOR SCHEDULE) F m a m TREES \ " L� KEY COMMON NAME 0 N STREAM OHN / � � � / - - AG VINE MAPLE ' z 75 STANDARD BUFFER —\ — P S v a w i 18.75 REDUCED BUFFER `\ - L `, , ; GG WESTERN HAZELNUT A u A O PS S I TKA SPRUCE \ vv L R L P L TP NESTERN RED GEDAR G L SHRUE35 / LL v KEY COMMON NAME G LL v \\ (P) 4'X21' DECK G RED -OSIER DOGWOOD / PMr LL S L (P) 8'X21' O SALAL \ ` L S L L L G ADDITION M LOW ORECON CRAPE O \ I L L P P LL L R PG PAGIFIG NINEBARK L , P SWORD FERN �0 L v R -- RS RED CURRANT L Ni R BALDHIP ROSE 3 �G \\ M TP R S SNONBERRY p O \\ r \ L LL LL R RL LL >z _ �� 5 �� V EVERGREEN HUGKLEBERRY Oi LL �° GROUNDGO�Ifiz q o LLL v ` KEY COMMON NAME LLL v \ - L LLLLLL k x x x LLL '_L v LLLLLL COAST STRAWBERRY Iv W O \ \ / � \ LLLLLLL� LL L M L �v `v DECK �O V- BRIDGE �, v ABOVE z \ LL LL M M LL x � G L `I V `� vvv < � IS) Lh G IL LL � � I �o L Lu �LL� LL G LL �� V 1� W DL z W ICK— �\ _ DECK W Q D I i v / \ P L P GRAPHI G SGALE EDGE OF OND P(I N FEET) 75' STANDARD BUFFER ` I 18.75 REDUCED BUFFER / 0 5 10 15 20 30� e POND SGALE:1:10 \ NOTES o a 1. BASE INFORMATION PROVIDED BY SITE SURVEYING, ING., 21ci23 NE IITH STREET, o SAMMAMISH, NA G0074, 425.2ci8.4412. FLA T SCHEDULE TREES a KEY SGIENTIFIG NAME COMMON NAME DENSITY OTY. SIZE NOTES LH ~ N O ' AC AGER GIRGINATUM VINE MAPLE Cl O.G. 2 2 CAL. MULTI —STEM (3 MIN.) w z A alJ1wN CC GORYLUS GORNUTA WESTERN HAZELNUT Cl' O.G. 2 CAL. MULTI —STEM (3 MIN.) A � Q A O PS PIGEA SITGHENSIS SITKA SPRUCE Cl' O.G. 2 2 CAL. FULL � BUSHY TP THUJA PL I GATA WESTERN RED GEDAR Cl' O.G. 2 2 CAL. FULL � BUSHY SHRUBS KEY SGIENTIFIG NAME COMMON NAME DENSITY OTY. SIZE NOTES G GORNUS SERIGEA RED —OSIER DOGWOOD 6' O.G. 5 CAL. MULTI —STEM (3 MIN.) C CAULTHERIA SHALLON SALAL 6' O.G. 14 GAL. FULL � BUSHY M MAHONIA NERVOSA LOW ORECON GRAPE 6' O.G. 8 GAL. FULL � BUSHY PG PHYSOGARPUS GAPITATUS PAGIFIG NINEBARK 6' O.G. 6 GAL. MULTI —STEM (3 MIN.) P POLYSTIGHUM MUNITUM SWORD FERN 6' O.G. q GAL. FULL � BUSHY RS RIBES SANCUINEUM RED CURRANT 6' O.G. 4 GAL. MULTI —STEM (3 MIN.) R ROSA CYMNOGARPA BALDHIP ROSE 6' O.G. 15 GAL. MULTI —STEM (3 MIN.) S SYMPHORIGARPOS ALBUS SNOWBERRY 6' O.G. 7 GAL. MULTI —STEM (3 MIN.) V VAGGINIUM OVATUM EVERGREEN HUGKLEBERRY 6' O.G. 12 GAL. FULL � BUSHY OROUNDGO\/ER KEY SGIENTIFIG NAME COMMON NAME DENSITY OTY. SIZE NOTES FRACARIA GHILOENSIS COAST STRAWBERRY 2' O.G. 75 4" POT FULL � I MULGH APPL I EI SPEC I F I INSTALL PLANTS 3" HIGH AND MULCH PERIMETER ENSURING NO MULCH OVER PLANT GROWN SET TREE/SHRUB STRAIGHT AND PLACE FOOTBALL ON SOLID GROUND OR ON GOMPAGTED BAGKFILL. BAGKFILL PLANTING HOLE 1/2 FULL WITH NATIVE SOIL, TAMP SOIL TO STABILIZE ROOTBALL. DO NOT DISTURB ROOTBALL. BAGKFILL REMAINING PLANTING HOLE PER SPEGIFIGATIONS. AMEND BAGKFILL AS NOTED IN THE INSTALLATION NOTES. FINAL GRADE. SGARIFY SIDES OF PLANTING HOLE. MAKE SURE HOLE HAS GOOD DRAINAGE. EXISTING NATIVE SOIL. ROOT BALL DIAMETER C,ONTAINER TREE/5HRJE3 FLANfi NC (fi f=. SGALE: NTS —IIIIIIIIIIIIIIIIIIIII �:mmmmm. @ O a O EQUAL D I STANGE C+ GROUNOGOVER PLANT SEE PLANT LIST 3" DEPTH BARK MULCH NO MULCH ON PLANT GROWN TOPSOIL DEPTH AND TYPE AS SPECIFIED EXISTING SUBGRADE OROUNDGOVER PLANT SPAGING AS INDICATED ON PLANT LIST (TYP I GAL) EDGE OF PLANTER R ®® I�® O V R F L A I R 7 I � (� F s — SGALE: NTS z ­17 W 9� SFEC, IF I GATIONS 2 3 51 5 6 0 I m THE BUFFER ENHANCEMENT AREAS SHALL BE GLEARED AND GRUBBED OF ANY INVASIVE AND NON-NATIVE SPEGIES. SOD SHALL BE STRIPPED, GRAVEL AND OTHER IMPERVIOUS SURFAGES SHALL BE REMOVED AND DEGONSOL I DATED. FOUR INGHES OF IMPORTED 3-WAY TOPSOIL SHALL BE PLACED OVER DEGONSOL I DATED AREAS AND LIGHTLY TILLED PRIOR TO PLANTING. ROGKS SHALL BE REMOVED AND STOGKP I LED FOR REPLAGEMENT IN THE BUFFER. ALL GRUBBED VEGETATION SHALL BE EXPORTED FROM THE SITE. ALL PLANTS SHOULD BE INSTALLED BETWEEN DEGEMBER I ST AND MARGH 15TH. ALL PLANTS SHALL BE PIT -PLANTED IN PLANTING PITS EXCAVATED 2X THE DIAMETER OF THE PLANT. PITS SHALL BE BAGKF I LLED WITH A 30/10 M I X OF STEERGO TO NATIVE SOIL. PLANTS SHALL BE INSTALLED 2" HIGH AND SURFAGED MULCHED TO A DEPTH OF 3" WITH MEDIUM -COURSE BARK MULCH, ARBORIST CHIPS OR COMPOSTED HOG FUEL PLACED CONTINUOUSLY THROUGHOUT THE ENTIRE PLANTING BEDS. ALL PLANTS SHALL BE NURSERY GROWN (IN W. WA OR OR) FOR AT LEAST I YEAR FROM PURGHASE DATE, FREE FROM DISEASE OR PESTS, WELL -ROOTED, BUT NOT ROOT -BOUND AND TRUE TO SPEGIES. PLANT LAYOUT SHALL BE APPROVED BY AOA PRIOR TO INSTALLATION AND APPROVED UPON COMPLETION OF PLANTING. UPON COMPLETION OF PLANTING, ALL PLANTS SHALL BE THOROUGHLY WATERED. ALL PLANTINGS SHALL BE IRRIGATED WITH AN ABOVE -GROUND, TEMPORARY IRRIGATION SYSTEM AT A RATE OF Y2" OF FLOW 2-3 TIMES WEEKLY, FROM JUNE 15-OGT 31 THE FIRST YEAR AFTER PLANTING. THE SECOND YEAR, FLOW SHOULD BE REDUCED TO PROVIDE Y2" OF FLOW 1-2 TIMES WEEKLY FROM -JULY I-OGT 15. THE SYSTEM CAN BE REMOVED AT THE END OF THE 3-YEAR MONITORING PERIOD. PERFORMANCE STANDARDS INGLUDE: 1) YEAR I - THERE W 1 LL BE 100% SURVIVAL OF ALL PLANTED SPEGIES. FOLLOW 1 NG YEARS 2-5, THERE WILL BE 00% SURVIVAL RATE OF ALL PLANTED SPEGIES OR EOU I VALENT REPLAGEMENT OF A COMBINATION OF PLANTED AND RE -COLON I ZED NATIVE SPEGIES. 2) FOLLOWING THE FIRST YEAR AFTER PLANTING, A COMBINATION OF NATIVE OR NATURALIZED WOODY VEGETATION WILL COVER AT LEAST 15% OF THE MITIGATION AREA. THE AERIAL GOVERAGE WILL INGREASE TO AT LEAST 25% FOLLOWING THE SECOND YEAR AFTER PLANTING, 309'o, FOLLOWING THE THIRD YEAR AFTER PLANTING, 40% FOLLOWING THE FOURTH YEAR AFTER PLANTING AND 50% FOLLOWING THE FIFTH YEAR AFTER PLANTING. 3) AFTER GONSTRUGTION AND FOLLOWING EVERY MONITORING EVENT FOR A PERIOD OF AT LEAST FIVE YEARS, EXOTIC, AND INVASIVE PLANT SPEGIES WILL BE MAINTAINED AT LEVELS BELOW 10% TOTAL GOVERAGE IN ALL PLANTED AREAS. THESE SPEGIES INGLUDE BUT ARE NOT LIMITED TO; HIMALAYAN AND EVERGREEN BLACKBERRY, REED GANARYGRASS, MORNING GLORY, JAPANESE KNOTWEED, ENGLISH IVY, THISTLE, PERIWINKLE, AND CREEPING NIGHTSHADE. ANNUAL MONITORING REPORTS WILL BE PREPARED AND SUBMITTED TO CITY OF EDMONDS EACH OF THE FIVE YEARS OF THE MONITORING PERIOD. THE REPORTS WILL DETAIL IF THE SITE IS MEETING THE PERFORMANCE STANDARDS AND PROVIDE PHOTOS FROM ESTABLISHED PHOTO POINTS. UPON APPROVAL OF PLANTING INSTALLATION BY AOA, CITY OF EDMONDS WILL BE NOTIFIED TO GONDUGT A SITE REVIEW FOR FINAL APPROVAL OF GONSTRUGTI ON. MAI NTENANGE SHALL BE IMPLEMENTED IN MARGH, MAY, -JULY AND OGTOBER FOR THE DURATION OF THE MONITORING PERIOD AGGORD I NG TO THE SCHEDULE BELOW. ANNUAL MAINTENANCE SCHEDULE MAI NTENANGE ITEM J F M A M J J A 5 O N D WEED CONTROL I I I I GENERAL MAINT. I I I I WATERING - YEAR 1 4 8 0 8 4 WATERING - YEAR 2 4 4 4 1-8 = NUMBER OF TIMES TASK SHALL BE PERFORMED PER MONTH. MAINTENANCE WILL INGLUDE: I. REMOVAL OF NON-NATIVE PLANTS, BY HAND, AS LISTED ABOVE. 2. CONTINUED APPLICATION OF IRRIGATION, AS NOTED ABOVE. 3. REMOVAL OF PEST INFESTATIONS, LIKE TENT GATERPILLAR AND SPRUGE APHID, AS DETAILED BY AOA IN THE MON I TORI N6 REPORT. 4. REPLAGEMENT OF PLANTS, AS D I REGTED BY AOA, IF MORTALITY EXGEEDS 20016. 5. THINNING OF RED ALDER AND MOWING OF TALL GRASSES, AS D I REGTED BY AOA TO ENSURE SURVIVAL OF PLANTED SPEGIES. 6. ANY ADDITIONAL ITEMS IDENTIFIED BY AOA DURING THE FIVE-YEAR MONITORING PERIOD. o ' �n A A��dACI� z O Q v � O v � W 0 +k� 3 J p0 W z0 z0 QLLJ � O v ~ C) Lu ry W DL v LL_�GL 013