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HomeMy WebLinkAboutTR_Arborist_Report_250108_v1 AREA SITE MAP ARBORIST SOLUTIONS Andrew Raines ISA Certified Arborist ISA TRAQ Certified ISA Utility Specialist PN-7684AU 206-747-5907 Andrew.Raines.Arb@gmail.com N .86 ACRES TREE INVENTORY MAP N 34N1 S R R F R R F R PROPERTY ACREAGE= (.86) ACRES *Credits NEEDED per NET ACRE= (25.6) -Retained tree credit=(26) -Planted tree credit=(17) TOTAL ONSITE CREDIT AFTER REMOVALS= (43) CREDITS 2 N2 1 C O N C E P T D R I V E W A Y F F F CONCEPT STRUCTU R E PROJECT DESCRIPTION: On the NW portion of parcel 2223059112 there is a plan to develop a structure/garage/living and driveway. In order to develop this project it will require trees 1 and 2 to be removed. Neighboring tree will not need to be protected unless there is excavation on neighboring property/ parcel. This property is .86 acres which needs 25.6 tree credits to be compliant. They will have 26 credits in retained trees and 17 credits in planted trees for a total of 43 tree credits. TREE # Species DBH” DIAMETER H’W’ DRIPLINE Health/Condition Mitigation TREE CREDITS 1 Douglas fir 26 90 45 In place of new development Remove and replace 0 2 Douglas fir 24 85 40 In place of new development Remove and replace 0 3 Cottonwood 38.5 90 50 Normal: shoreline tree, retaining shoreline edge, possible future undermine from erosion Retain for shoreline 13 4 Cottonwood 37 90 50 Normal: shoreline tree, retaining shoreline edge, possible future undermine from erosion Retain for shoreline 13 N1 Oak 10 25 25 Normal: Neighbors tree Retain and protect 0 N2 Cherry 27 45 45 Normal: Neighbors tree, previously failed lead, and co-dominant leads at 3ft Retain and protect 0 F Fir (variety)-6’-Replacement tree: MEDIUM VALUE (1)5 Planted 5 S Sequoia redwood -6’-Replacement tree: LARGE VALUE (2)1 Planted 2 R Costal redwood -6’-Replacement tree: LARGE VALUE (2)5 Planted 12 ***The supplemental trees shall be planted with a minimum size of two-inch (2") caliper, or evergreen trees with a minimum size of six feet (6') tall. RMC 4-4-130H1b b. Tree Credit Requirements: With the exception of interior remodels not involving any building addition, removal of trees, or alteration of impervious areas, properties subject to an active land development permit shall comply with all of the following minimum tree credit requirements, and apply the tree credit value table in subsection H1bv of this Section: i. Tree credit requirements shall apply at a minimum rate of thirty (30) credits per net acre. ii. Either tree retention or a combination of tree retention and supplemental tree planting (with new small, medium, or large tree species) shall be provided to meet or exceed the minimum tree credits required for the site. iii. Supplemental tree planting shall consist of new small, medium, or large species trees, as defined in RMC 4-11-200, Definitions T. The supplemental trees shall be planted with a minimum size of two-inch (2") caliper, or evergreen trees with a minimum size of six feet (6') tall. The Administrator shall have the authority to approve, deny, or restrict the tree species for proposed supplemental trees. iv. Within subdivisions, location of supplemental tree replanting shall be prioritized within tree tract(s) versus individual lots. v. Tree credit value for each tree, existing or new, is assigned as shown in the following table: TREE SIZE TREE CREDITS New small species tree 0.25 New medium species tree 1 New large species tree 2 Preserved tree 6 – 9 caliper inches 4 Preserved tree 10 – 12 caliper inches 5 Preserved tree 12 – 15 caliper inches 6 Preserved tree 16 – 18 caliper inches 7 Preserved tree 19 – 21 caliper inches 8 Preserved tree 22 – 24 caliper inches 9 Preserved tree 25 – 28 caliper inches 10 Preserved tree 29 – 32 caliper inches 11 Preserved tree 33 – 36 caliper inches 12 Preserved tree 37 caliper inches and greater 13 Example: A 0.22 net acre (9,583.2 square feet) lot would need seven (7) tree credits (30 x 0.22 = 6.6, rounded up to 7). The tree credit requirements for the lot could be met by retaining one existing seventeen-inch (17") tree (seven (7) tree credits) or by planting three (3) new large species trees (two (2) tree credits each) and one new medium species tree (one tree credit). REQUIREMENTS: Arborist Report: A report prepared by an ISA certified arborist or ASCA certified consultant that correlates with the Tree Retention/Land Clearing (Tree Inventory) Plan and includes the following: a.The project location, description of proposed development, and description of proposed tree removal; and b.A conceptual tree removal and retention plan; and c.An inventory of all trees on site to be retained and removed, with details regarding tree species, size, health, proposed reasons for any removal, and the tree credit value for each tree pursuant to the table shown in RMC 4-4-130H1b, Tree Credit Requirements; and d.In cases where high-risk trees are proposed for removal, the report shall be prepared by an arborist with ISA Tree Risk Assessment Qualification (TRAQ) and include an ISA Tree Risk Assessment standard form fully completed.