3400 RIVERFRONT BLVD 2015 Plans 2022-12-02 (12)

P'LANTING NOTES � Plantin shall take lace in the earlv s r�n or late fall. All lants shall be obtained from a re utable nurse Care and PROJECT NOTES g p p � p P n'• GF��t�.SOIL SPECIFICATIONS handling of all plant materials is extremely important to the overall success of the project. The origin of all plant materials P�'e-Coastractioa Meetiag specified in this plan shall be native plants, nursery grown in the Puget Sound region of Washington. Some limited species Mitigation projects are typically more complex to install than to describe in plans. Careful monitoring by a wetland rofessional for all ortions of this ro ect is stron 1 recommended. Construction timin and se uencin is im ortant to the All planting areas, at project completion, shall demonstrate the following: substitution may be allowed, only w�th the agreement of the landscape designer,wetland professional, and Gity staff. P P P J g Y g q g P . • success of this type of project. There will be a pre-construcrion meeting on this site bet�veen the Permittee, the consulting 1) A topsoil layer with a minimum organic matter content of ten percent dry weight in planting beds, and 5% organic Pre-Plantaag Meettag wedand professional, and laborers. The objective will be to verify the location of erosion control facilities, verify the location of Prior to removal of invasi��e species or installation of mitigation plantings, a site meering between the contracted landscaper mitigation areas, identification of planting zones, and to discuss project sequencing. During, or immediately after, this meeting matter content in turf areas, and a pH from 6.0 to 8.0 or matching the pH of the original undisturbed soil. The topsoil layer it will be determined if the buffer enhancement lantin areas would benefit from a water-storin ol er such as Soil Moist shall have a minimum depth of eight inches except where tree roots limit the depth of incorporation of amendments needed and the consulting wetland professional shall occur to resolve any questions that may arise. During this meeting, the plant p g g p �' � �' to meet the criteria. Subsoils below the topsoil layer should be scarified at least 4 inches with some incorporation of the spacing and locations of plant species within the different planting zones w�ill be disscussed beriveen the landscape contractor �pe�o� upper material to avoid stratified layers, where feasible. and the consulting wedand professional. During this meeting it will be determined if the buffer enhancement planting areas will require a w-ater-storing polymer (such as Soil Moist). A wetland professional shall be contracted to periodically inspect the mitigation installation described in this plan. Minor adjustments to the original design may be necessary prior to and during construction due to unusual or hidden site conditions. 2) Planting beds must be mulched with 2 inches of organic material. ti � � Hy��$ A City of Everett representative and/or the consulting professional�n�ill make these decisions during construction. N O O 3) Quality of compost and other materials used to meet the organic content requirements: d' N Plants shall be handled so as to a�oid all damage, including: breaking, bruising, rcot damage, sunburn, drying, freezing, or � � other injury-. Plants must be covered during transport. Plants shall not be bound with wire or rope in a manner that could COIVTINGENCY PI.AN � � � damage branches. Protect plant roots with shade and wet soil in the time period between delivery and installation. Do not lift If 20% of the plants are severely stressed during any of the inspections, or it appears 20% may not survive, additional plantings a) The organic content for pre-approved amendment rates can be met only using compost that meets the definition of � , c-I of the same s ecies ma be added to the lantin area. Elements of a contin enc lan ma include but will not be limited to: "composted materials" in WAC 173-350 section 220. This code is available at the Dept. of Ecology's website: U � .� container stock by trunks, stems, or tops. Do not remove from containers until ready to plant. Water all plants as necessary to P Y p � g Y P Y � W v keep moisture levels appropriate to the species horticultural requirements. Plants shall not be allowed to dry out. All plants more aggressive weed control, pest control, mulching, replanring with larger plant material, species substitution, fertilization, soil www ec�wa.gov/�ro�rams/swfa/organics/soil.html The compost must also have an organic matter content of 35% to 65%, O � � shall be watered thoroughly immediately upon installation. amendments, and/or irrigation. If any areas of existing vegetation scheduled to remain are damaged during construction, these and a carbon to nitrogen ratio below 25:1. The carbon to nitrogen ratio may be as high as 35:1 for plantings composed � � � areas will be re lanted with the s ecies and s acin re uirements listed in the a roved buffer enhancement lantin lans. entirely of plants native to the Puget Sound Lo�vlands region. � P P P g q PP P g P 3 �i : Storage Visual observation of existing vegetation will be performed during each monitoring inspection. If dead or stressed vegetation is � � � Plants stored by the Permittee for longer than one month prior to planting shall be planted in nursery rows and treated in a observed, a replacement planting plan will be created and installed. b) Calculated amendment rates may be met through use of composted materials as defined above; or other organic materials � 0 � manner suitable to those species' horticultural requirements. Plants must be re-inspected by the wedand biologist and/or amended to meet the carbon to nitrogen ratio requirements, and meeting the contaminant standards of Grade A Compost landscape designer prior to installation. Beaver A�etivity The Buffer Enhancement planting lists ha�e been designed with a mix of deciduous and coniferous trees. Deciduous trees, sueh The resulting soil should be conducive to the type of vegetation to be established. Damaged plants as willow, are generally preferred forage species for beavers. Willows also regenerate quickly and can sun�ive beaver foraging. The willows specified in the buffer enhancement plantings will be planted close to the river. Conifers will be planted further away from Damaged, dried out, or otherwise mishandled plants will be rejected at installation inspection. All rejected plants shall be y p g y g � y p y PERFORMANCE ASSURANCE O immediatel �removed from the site. the river than the willows. B rovidin willows as an easil auailable fora e source it is likel the beaver will referentiall browse y A set-aside amount for the buffer enhancement shall be provided to the City of Everett for the period of five � w the willow and not the conifers. However, should significant beaver activity be observed during the installation and/or monitoring P1ant Names period, additional measures will be taken to protect the enhancement plantings. These measures may include tree cages, fencing years from the completion of the project. Thie set-aside amount shall cover the costs of monitoring, � � � Plant names shall com 1 w�th those enerall acce ted in the native lant nurse trade. An uestion re ardin lant s ecies along the wetland edge, and/or additional plantings. If tree cages or fencing is used, all cage and/or fencing material will be maintenance, and contingencies, including 50% of the cost of plantings. Contingencies must be implemented Cn p y g y p p '�' y q � �P p removed at the end of the monitoring period and disposed of off-site. based upon the findings of the monitoring. The City may release the set-aside sooner than 5 years if the � � w O d- � or varie ty shall be referred to the landsca pe desi g ner, wedand pr of e s si on al, or Ci t y s t a ff. A l l p l a n t m a t e r i a l s s h a l l b e t r u e t o � � N � � species and variety and legibly tagged. enhancement is determined by the City to be successful. The definitions of success shall be as described under �.,,� w op � O CE Project Monitoring Program in this plan. Installation, monitoring, and maintenance estimates are provided for � r� > � m M The mirigation areas will require periodic maintenance to remove undesirable species and replace vegetation mortality. � \" V a Q (� C� Qnality and eoaditioa Maintenance shall occur in accordance with the approved plans. Maintenance may include, but will not be limited to: set-aside calculation purposes only and are not actual bids. � � m m Plants shall be normal in pattern of gro��th, healthy, well-branched, vigorous, have well-developed root systems, and be free of repairing/replacing temporary irrigation system, changing irrigation settings as appropriate, removal of competing grasses and � O� F= � � pests or diseases. Damaged, diseased, pest-infested, scraped, bruised, dried out, burned, broken, or defecUve plants will be • .� � N N invasive species (by hand if necessary), fertilization (if necessary), replacement of plant mortality, and the replacement of mulch Estimated Mitigation Installation Costs � � � � rejected. Plants ti�th pruning wounds over 1" in diameter will be rejected. for each maintenance period. Chemical control, only if approved by City staff, shall be applied by a licensed applicator following Quantity of one-gallon plants ($15 each, installed and mulched) 1,492 x 15 = $22,38�.00 +,,, �� O w J all label instructions. Maintenance shall occur a minimum of 2 times per growin g season durin g the monitorin g period. Q u a n t i t y o f w h i p s ($2.5 0 e a c h, i n s t a ll e d) 2 0 x 2.5 = $5 0.0 0 � �"'�` � W � � Roots � All plants shall be balled and burlapped or containerized, unless e�licitly authorized by the landscape designer and/or IRRTGATION wedand professional. Rootbound plants or B&B plants with damaged, cracked, or loose rootballs (major damage) will be A temporary, above ground irrigation system will be installed in the buffer enhancement areas. This system will remain in place 50% Estimated Planting Cost $ 11,215.00 rejected. Immediately before installation, plants with minor root damage (some broken and / or twisted roots) must be for a minimum of two years. The mirigation buffer irrigation plan has been designed utilizing MP Rotators, which will provide Estimated Maintenance Cost $2,000/yr $ 10,000.00 root-pruned. Matted or circling roots of containerized plantings must be pruned or straightened and the sides of the root ball adequate irrigation to both the areas with existing native vegetation as well as the outer buffer areas that�vill contain all newly Estimated Monitorin� Cost $1�500/�r �6�000.00 must be roughened from top to bottom to a depth of approximately half an inch in two to four places. Bare root plantings of installed plant material. For additional information on the proposed irrigation system,please refer to the irrigation set submitted Total Estima.ted Set-aside Amount $27,215.00 �vood�- material are allo��ed only with permission from the landscape designer, wetland professional, and/or City staff. by Core Design, Inc. p � . O � Sizes U N �o Plant sizes shall be the size indicated in the lant schedule in a roved lans. Lar er stock ma be acce table rovided that it PROJECTS GOAIS, OBJECTIVES AND PERFORMANCE STANDARDS � � � � � P PP P g Y P P � � c has not been cut back to the size specified, and that the root ball is proportionate to the size of the plant. Smaller stock may be The following goal, objectives, and performance standards will be evaluated to ensure success of the mitigation project. � � o � o acceptable, and preferable under some circumstances, based on site-specific conditions. Measurements, caliper, branching, and �� 0 0 � � � balling and burlapping shall conform to the American Standard of Nursery Stock by the American Association of Nurserymen ' � � Q � � ;latest edition). The goal of this project is to improve functions and values of the river buffer on this site through buffer enhancement. This will Q > Q �j � provide greater protection to the Snohomish River and proivide increase wildlife habitat. This goal will be achieved if the W � � w � Form performance standards listed below are reached. � � z � � � Z �' � Evergreen trees shall have single trunks and symmetrical, well-developed form. Deciduous trees shall be single trunked unless , � N � Project Snccess &Compliaace � — specified as multi-stem in the plant schedule. Shrubs shall have multiple stems and be well-branched. �-I � � m Timiag of Plantiag Criteria for Snccess � Unless other�azse approved by City- staff, all planting shall occur between November 1 and March 1. Overall, the earlier plants Upon completion of the proposed mitigation project, an inspection by a qualified biologist will be made to determine plan go into the ground during the dormant period, the more time they ha��e to adapt to the site and extend their root systems compliance. A compliance report will be supplied to the City of Everett within 30 days after the completion of planting. A landscape professional or wetland biologist will perform condition monitoring of the plantings annually in the fall. A written before the �•ater demands of spring and summer. report describing the monitoring results will be submitted to the City after each site inspection of each monitored year. Final Weediag inspection will occur five years after completion of this project. The contracted consultant will prepare a report as to the success of the project. Non-native, invasive vegetation in the mitigation planting areas will be removed prior to plant installation. Contractor will ensure complete removal of all invasive/non-native species roots including: English ivy, Himalayan blackberr, bindweed, Performaace Standards Scotch broom, and bittersweet nightshade. Appropriate methods for removal are outlined for the planting areas w�ith the Performance Standard 1: There shall be 100 pereent survival of all the plantings after Year l, or the permittee shall replace the planring lists on this sheet. material. At least 80 percent of the plant material installed shall survive in Year 5 after installation. ' z � Invasi��e plants ��ill be hand-weeded from around all newly installed plants throughout the monitoring period. No chemical Performance Standard 2: There shall be a minimum of 80 percent cover by native species and ground cover after the fifth year Q ' control of vegetation ti-i11 take place without the approval of the wedand professional and/or City staff. post-installation. This includes existing plants and volunteer natives. J � Site eonditions Performance Standard 3: There shall be less than 15 percent cover of weedy/invasive cover in the buffer surrounding the planting z The contractor shall immediately norify the landscape designer and/or wetland professional of drainage or soil conditions area for all five years post-installation. �! likely to be detrimental to the growth or survival of plants. Planting operations shall not be conducted under the following Q ' conditions: freezing weather, when the ground is frozen, excessively wet weather, excessively w�indy weather, or in excessive The mitigation site shall support at least 80% of the native plants set forth in the approved mitigation plan by the end of five � � heat. years. The species mix should resemble that proposed in the planting plans, but stnct adherence to obtaimng all of the species Q a . . shall not be a criterion for success. Any plant species not listed on the approved planting plan must receive approval from the City � , Z ��g�� of Everett Planning Department. Installed mitigation plan must retain 80% of the conifer plantings specified in the approved Planring pits shall be circular or square with vertical sides, and shall be 6" deeper and 12" larger in diameter than the root ball planting plans. � O � of the plant. Break up the sides of the pit in compacted soils. Set plants upright in pits. Any burlap shall be removed from the � ('3 planting pit. Backfill shall be worked back into holes such that air pockets are removed without adversely compacting down PROJECT MONI1'ORING PROGRAM � � Z soils. � � 2 Requirements for monitoring project: z i (n Mnlch and Woodchips l. Initial compliance/as-built report w ��/1 j All buffer enhancement areas denuded of vegetation shall receive 3" of compost before plants are installed. Compost shall be 2. Annual site inspection (once per year in the fall) for five years � �� > Cedar Grove 3-Wa To soil mix or a roved e ual. Within the areas of existin ve etation if com ost is necessary, it will be 3. Monitoring reports (submitted in the fall of Year 1, Year 3, and Year 5 Y P PP q g � � P ) w �� FI-- applied in rings around installed plants prior to woodchips. Purpose for Moaitori.ng (, O� � After buffer enhancement plant installation, a 36" circle of no less than 2 to 4 inches of organic/untreated woodchips shall be The purpose for monitoring this mitigation project shall be to evaluate its success. Success will be determined if monitoring z � W placed around the base of each plant. Woodchips shall be kept well away (at least 2 inches) from the trunks and stems of shows at the end of five years that the definitions of success stated above are met. The property owner shall grant access to the Q � w �vood}'plants. mitigation area for inspection and maintenance to the contracted landscaper, wetland specialist, and City of Everett staff during = N �i the monitoring period or until the project is evaluated as successful. z � Ferbilizer w �' Slo�ti- release fertilizer may be used if pre-approved by the City of Everett. Fertilizers shall be applied only at the base of Monitoriag � plantings underneath the required covering of mulch (that does not make contact with stems of the plants). No soil Monitoring shall be conducted annually for five years in accordance with the approved Mitigation Plan. The monitoring period � � amendments or fertilizers��ill be placed in planting holes. will begin once the City receives written notification confirming the mitigation plan has been implemented and City staff issues w approval of the installation. � Staldng � l�iost shrubs and many trees DO NOT require any staking. If the plant can stand alone without staking in a moderate wind, do Vegetatitoa Monitoriag � not use a stake. If the lant needs su ort then stra in or webbin should be used as low as ossible on the trunk to loosel - Sampling points or transects will be established for vegetation monitoring. Permanent photo points will be established from which p pp ' pp g � p y hotos will be taken throu hout the monitorin eriod. Permanent sam hn oints must be identified on the miti ation site lans APPROVED � brace the tree w�th two stakes. Do not brace the tree tighdy or too high on the trunk. If the tree is unable to sway, it will further p � g p p g p g p t-�LANNING & COMMJi��T4'" lose the abiliry to support itself. Do not use wire in a rubber hose for strapping as it exerts too much pressure on the bark. As in the first monitoring report (they may be drawn on approved plans by hand). Each sampling point shall detail herbaceous, DEVELOPMENT DEP y shrub, and tree coverage. Monitoring of vegetation sampling points shall occur annually between May 15 and October 31 (prior soon as supporting the plant becomes unnecessary, remove the stakes. All stakes must be removed within two (2) years of to leaf drop), unless otherwise specified. F3Y `_`�,wT� __7 Z� /',6 � installation. � Photo poiats Plaat Loeatioa No less than fifteen permanent photo points will be established throughout the mitigation areas. Photographs will be taken from . Colored surveyors ribbon or other appropriate marking shall be attached to the installed plants to assist in locating the plants these points to visually record condition of the enhancement area. Photos shall be taken annually between May 15 and October �vhile remo�ring the compering non-native vegetation and during the monitoring period. 31 (prior to leaf drop), unless otherwise specified. Arrangemeat and Spaciag The plants shall be arranged in a pattern with the appropriate numbers, sizes, species, and distribution that are required in accordance w�ith the approved plans. The actual placement of individual plants shall mimic natural, asymmetric vegetation patterns found on similar unclisturbed sites in the area. Spacing of the plantings may be adjusted in areas of existing native S H E ET 3 vegetation as explained for each zone on Sheet 2 of this plan. Inspection(s) A��-etland professional shall be present on site to inspect the plants prior to planting. Minor adjustments to the original design � ma�-be re uired rior to and durin construction. �