Arborist Report for 87 & 91 Brookfield & 174 Lakeshore Road West Oakville, ON (July 23, 2013)

Transcription

1 Arborist Report for 87 & 91 Brookfield & 174 Lakeshore Road West Oakville, ON (July 23, 2013) Tel: , D. Andrew White M. Sc. ISA Certified Arborist ON Marcella St. Toronto, ON, M1G 1L2. 1. Introduction The following is an arborist report for the properties at 87 and 91 Brookfield Road and 174 Lakeshore Road West in Oakville Ontario. The purpose of this report was to ascertain the potential impacts of the proposed construction of a garage on the trees on, and near, the subject site. This report was written for Storybook Services. 2. Methods An on-site inspection was made on October 19, 2012, and July 22, The sizes of individual trees were measured as diameter at breast height (DBH), breast height being 137 cm from ground level. The locations of these trees are indicated on the arborist s plan (Fig. 1). Further details are indicated on the full site plan (Fig. 2). From the data collected plant Condition Rating (CR), Location Rating (LR), Species Rating (SR), and minimum Protection Zones (TPZ), were estimated. 1,2 3. Discussion There are plans to build a new house at Brookfield-Lakeshore development site. In order to allow for the proposed development twelve (12) road allowance trees will need to be removed. The most prevalent roadside tree species over 12 cm DBH is Siberian elm (44.4%), and the second most common species is black walnut (22.2%). (Table 1, Fig. 1). Species DBH DBH DBH % Species > 12 cm > 20 cm > 76 cm DBH > 10cm Crab-apple tree % Birch tree % Siberian Elm % Norway Maple % Mulberry % Black Walnut % Total %

2 There are thirty nine (39) trees over 12 cm DBH, and twenty five (25) private trees over 20 cm DBH, on the subject site. Only one tree, a willow, is over 75 cm DBH. Most of the trees in the central portion of the site would be removed. Norway maple is the most prevalent species (28%) on the site over 20 cm DBH. The second most prevalent species on the site is Scots pine (24%). Less than twenty percent (< 20%) of the property is covered by closed canopy. Some of the trees near the perimeter of the site could potentially be retained (Table 1, Fig. 1). Species DBH DBH DBH % Species > 12 cm > 20 cm > 76 cm DBH > 20cm Apple tree % Trembling Aspen % Crab-apple % Green Ash % White Cedars % Cherries / Plums % Lilac % Honey Locust % Norway Maple % Silver Maple % Mulberry % Scots Pine % Norway Spruce % White Spruce % Black Walnut % Weeping Willow % Total % There are five (5) trees over 12 cm DBH on neighbouring properties that are less than six metres from the subject site. These trees could be retained with a fairly low risk of injury. The most prevalent species on neighbouring properties is white cedar (Table 1, Fig. 1). Species DBH DBH DBH % Species > 12 cm > 20 cm > 76 cm DBH > 12cm White Cedar % Siberian Elm % Norway Maple % Total %

3 3.2 Canopy Cover: The existing site currently has approx sq. m of tree canopy cover, which represents 13% of the total site area. The proposed construction would require the removal of a number of trees, which would result in an approx.. loss of 290 sq. m of tree canopy cover. The new existing canopy cover would therefore by 100 sq. m or approx. 3.5% of the total site. The net loss is approximately 9.5% canopy cover. The current proposed development has made room for greater than 415 sq. m of new canopy, for a new total of 515 sq. m (18%). Therefore the estimated potential increase of canopy cover could be approximately 5% over its current condition. 3.3 Replacement s: Marton Smith Landscape Architects Inc. shall be developing a landscape plan for the Brookfield-Lakeshore development site. The new trees would be of large calliper (50-60 mm) nursery grown stock. The transplanting burlapped or balled trees would be in accord with the Oakville and Halton Region s tree protection bylaws. These trees are to be maintained in good condition. Supplemental watering may be required during the drier periods of the year, especially during the first two or three years. 3,4 4. Conclusions In order to allow for the proposed development of the 87 and 91 Brookfield Road and 174 Lakeshore Road West site, eighteen road allowance trees and twenty five tree private trees over 20 cm DBH could potentially be affected. In addition, there are five trees on neighbouring properties that are less than six metres from the site. D. Andrew White M. Sc. July 23, References 1. Council of Landscape Appraisers Guide for Plant Appraisal. 9th Edition. International Society of Arboriculture. 2. International Society of Arboriculture of Ontario Ontario Supplement to Guide for Plant Appraisal 8th Edition. Ontario Chapter, ISA. 3. Town of Oakville Private Protection By-law Amended by by-law Town of Oakville, Forestry Section. 4. Halton Ontario Halton By-law ( The Regional Municipality of Halton.

4 6. Data Table #1. number (No.), species, diameter at breast height (DBH), comments, Condition Rating (CR), and Category (TC). No. Species DBH (cm) Canopy (approx.) Location Condition Rating (%) Category Recommendations 1 Mulberry m Ø SW 65 City To be Preserved 2 Birch m Ø W 70 City To be Preserved 3 Siberian Elms 22, 4.4 m Ø W City To be removed due to site grading 4-8 Siberian Elms 10, 14, 10, 15 & m Ø W City To be removed due to site grading 9 Siberian Elm m Ø W 65 City To be removed due to site grading 10 Curly willow m Ø N 70 City To be removed due to site grading 11 Black Walnut m Ø NE 65 City To be removed due to site grading 12 Black Walnut m Ø NE 70 City To be removed due to site grading 13 Black Walnut m Ø NE 65 City To be removed due to site grading 14 Siberian Elm m Ø NE 60 City To be removed due to site grading 15 Black Walnut m Ø SW Private To be Preserved 16 Scots Pine m Ø W Private To be removed due to site grading 17 Norway Spruce m Ø S Private To be Preserved 18 Honey Locust m Ø N Private To be removed due to site grading 19 Norway Spruce m Ø N Private To be removed due to site grading 20 Silver Maple m Ø SE Private To be removed due to site grading 21 Weeping Willow m Ø SW Private To be Preserved 22 Norway Maple m Ø E Private To be removed due to site grading 23 Norway Maples m Ø E Private To be Preserved 24 Norway Maples m Ø E Private To be Preserved 25 Norway Maples m Ø E Private To be Preserved

5 No. Species DBH (cm) Canopy (approx.) Location Condition Rating (%) Category Recommendations 26 Green Ash m Ø E Private To be Preserved 27 Norway Maple m Ø W Private To be removed due to site grading 28 Norway Maple m Ø SW Private To be removed due to site grading 29 Norway Maple m Ø SW Private To be removed due to site grading 30 Siberian Elm m Ø E Neigh. To be Preserved 31 Norway Maple m Ø S Private To be removed due to site grading 32 Scots Pine m Ø NW Private To be removed due to site grading 33 Scots Pine m Ø NW Private To be removed due to site grading 34 Scots Pine m Ø NW Private To be removed due to site grading 35 Mulberry m Ø NW Private To be removed due to site grading 36 Scots Pine m Ø NW Private To be removed due to site grading 37 White Spruce m Ø N Private To be removed due to site grading 38 White Spruce m Ø N Private To be removed due to site grading 39 Apple tree m Ø N Private To be removed due to site grading 40 Norway Maple m Ø E Private To be removed due to site grading White Cedars 16, 17 & m Ø SE Neigh. To be Preserved 44 Lilac m Ø SE Private To be removed due to site grading 45 Norway maple m Ø E Private To be removed due to site grading 46 Aspen m Ø SE Private To be Preserved 47 Elm, dead m Ø SE 87 0 Private To be removed due to site grading 48 White cedar m Ø SE Private To be Preserved 49 Stone fruit m Ø NE Private To be removed due to site grading 50 Stone fruit m Ø NE Private To be removed due to site grading 51 Stone fruit m Ø NE Private To be removed due to site grading 52 Crab-apple m Ø NW Private To be removed due to site grading

6 No. Species DBH (cm) Canopy (approx.) Location Condition Rating (%) Category Recommendations 53 Crab-apple m Ø NW Private To be removed due to site grading 54 Apple tree m Ø N Private To be removed due to site grading 55 Crab-apple m Ø NW Private To be removed due to site grading 56 Scots pine m Ø NW Private To be removed due to site grading 57 Mulberry m Ø NW 75 City To be removed due to site grading Crab-apples 3 & m Ø Black Walnuts 15 & m Ø Norway Maples 14 & m Ø Norway maple 8, 14, 9, 9 & m Ø NW City To be removed due to site grading NE 70 City To be removed due to site grading NE City To be removed due to site grading NE Neigh. To be Preserved

7 6 Figure #1: Arborist s Plan and layout of the Brookfield-Lakeshore development site. s are numbered, and tree protection barriers (red) are indicated.

8 Photograph #1: Front yard trees on the Brookfield Road side of the Brookfield- Lakeshore development site. Photograph #2: Backyard trees on south-east side of the Brookfield-Lakeshore development site.

9 Photograph #3: Front yard trees on the north-east side of the Brookfield-Lakeshore development site. Photograph #4: Backyard trees on the Lakeshore Road side of the Brookfield-Lakeshore development site.