TREE SPECIES, CONDITION AND SIZE

Transcription

1 P.O. Box 13593, Ottawa, ON K2KK 1X6 Telephone: (613) Fax: (613) Website: Urban Forestry & Forest Management Consulting James Lennox, B.L.A., O.A.L.A. James B. Lennox & Associates Inc. Landscape Architects Suite 200A, Hampton Park Plazaa 1419 Carling Ave. Ottawa, ON K1Z 7L6 January 8, 2015 Re: Tree Condition Report Broadview Public School, 590 Broadview Avenuee Dear Jim, This report details the pre-construction assessment of seventeen individual trees on the above- of noted school property in Ottawa. Each of these trees will be removed prior to the construction a new school and demolition of the existing school building. The proposed new constructionn includes a 2-storey elementary school with surrounding sports field, garden and play areas, etc. As a result of the degree of site disturbance associated with this construction and the demolition of the existing building the retention of all existing trees within the school site is not considered possible. However trees located elsewhere on school property and the many city-owned trees on the frontages along Broadview, Dovercourt and Denburyy Avenues will be preserved as they far enough away so as not to be disturbed. All of the ash trees present on the property are infested to varying degrees by Emerald ash borer (Agrilus planipennis). If not treated with systemic insecticides they willl all succumb to this introduced insect. Only one of the trees to be removed is of a size and health condition which would allow it to be successfully transplanted. This is the single serviceberry. However,, it is likely the compacted and thin soils on the site will not allow for the use of hydraulic tree spades. TREE SPECIES, CONDITION AND SIZE On pages 2 and 3 Table 1 details the species, condition and size (diameter) of the individual trees to be removed from the property. Each tree is referencedd by the numbers plotted on the accompanying landscape plan prepared by James B. Lennox & Associates Inc. 1

2 Table 1. Species, condition and diameter of trees to be removed from 590 Broadview Ave. Tree Tree Species Condition DBH 1 Tree Condition Notes No. (VP E) (cm) 1 Norway maple (Acer platanoides) Very poor 21.9 Maturing tree; poor root collar due to girdling roots & mower damagewounding to 0.3m; spiral fracture with reaction wood on main stem on SW side to 1.7m-possible frost crack; undesirable, highly invasive species 2 Oakleaf mountain ash Good 47.5 Mature specimen tree; primary union at (Sorbus x hybrida) 3 Eastern cottonwood (Populus deltoides ssp. deltoides) 3m with 8 competing stems-broad crown Fair Over mature tree; tri-stemmed at 2mbroad crown; dead heart root on N side with embedded t-post; sidewalk against base of tree on S side; aggressive rooting and weak wood make this an undesirable species for urban plantings 4 Ash (Fraxinus spp.) Poor 17.8 Very early signs of infestation by Emerald ash borer (EAB)-bark sloughing 5 Ash Fair 23.9 No outward signs of EAB infestation 6 Red maple (Acer rubrum) Good 30.7 Maturing tree; central stem to top with multiple competing laterals and leadersbroad crown 7 Norway maple Very poor 37.7 No viable buds found to be present-tree is in advanced decline/dead; undesirable, highly invasive species 8 Norway maple Fair 40.3 Maturing tree; primary union at 2.5m with co-dominant, parallel stems; major wound at 1-2m on S side with decay fungi and woodpecker holes present-tree is hazardous 9 Norway maple Fair 47.5 Maturing tree; tri-stemmed at 1.5m; central stem with two competing laterals; undesirable, highly invasive species 10 Ash Fair 26.1 Very early signs of EAB infestation-bark sloughing; crown asymmetrical due to previous clearance work from school roof 11 Ash Fair 28.4 Very early signs of EAB infestation-bark sloughing; crown asymmetrical due to previous clearance work from school roof 12 Ash Good 29.9 No outward signs of EAB infestation 13 Colorado blue spruce (Picea pungens var. glauca) Very good 42.9 Mature tree; crown raised to 6m; good pyramidal form; good crown density, growth increment and needle colour 2

3 Table 1. Continued Tree Tree Species No. 14 White elm (Ulmus americana) 15 Serviceberry (Amelanchier spp.) 16 Silver maple (Acer saccharinum) 17 Silver maple Fair 19.2, 27.4, 21.9, Diameter at breast height, or 1.4m from grade unless otherwise noted. Condition (VP E) DBH 1 (cm) Tree Condition Notes Good 26.3 Maturing tree; no outward signs of Dutch elm disease (Ophiostoma ulmi); primary union at 3.5m; generally symmetrical crown form Good 5.0 Juvenile tree; single stemmed to 0.5m; transplantable Fair 22.8, Maturing tree; tri-stemmed at 0.3m; 29.0, crown moderately asymmetrical due to 22.1 pruning from Hydro lines-dense with sprouts as a result; secondary lateral stem at 0.65m-24.2cm in diameter; aggressive rooting and weak wood make this an undesirable species for urban plantings Maturing tree; four-stemmed at 0.35m; lower crown slightly asymmetrical due to pruning from school; aggressive rooting and weak wood make this an undesirable species for urban plantings Pictures 1 through 5 on pages 4, 5, 6, and 7 show selected trees to be removed from the school property. Please do not hesitate to contact me with any questions concerning this report. Yours, Andrew Boyd Andrew K. Boyd, B.Sc.F., R.P.F. Consulting Urban Forester ISA Certified Arborist #ON-0496A Qualified ISA Tree Risk Assessor 3

4 Picture 1. Oakleaf mountain ash #2 at 590 Broadview Ave. 4

5 Picture 2. Ash trees #4 and 5 at 590 Broadview Ave. (unassessed honey-locust between ash) 5

6 Picture 3. Maple trees #6, 7, 8 and 9 at 590 Broadview Ave. Picture 4. Ash trees #10, 11 and 12 and Colorado spruce #13 at 590 Broadview Ave. 6

7 Picture 5. Silver maple trees #16 and 17 at 590 Broadview Ave. 7