Urban Forest Associates Inc

Transcription

1 Urban Forest Associates Inc. Arborist Report for 2964 Bristol Circle, Site Plan No , Oakville, Ontario Owner and Applicant: Ontario Inc Bristol Circle Oakville, ON L6H 6G4 Phone: First Draft: June 30, 2014 First Revision: February 11, 2015 Second Revision: March 23, 2015 Third Revision: July 20, 2015 Fourth Revision: January 5, 2016 This 10-page report was completed by Alex Karney, B. Sc., M.F.C., ISA Certified Arborist #ON-1674A, ISA Tree Risk Assessment Certified. All data was collected by Alex Karney.

2 Table of Contents A. Overview 3 B. Trees and Site Description C. Tree Protection, Removals, and Injury..7-8 D. Tree Replacement..9 E. Appendix: Limiting Conditions 10 Tables Table 1: Tree Inventory for 2964 Bristol Circle 5-6 Figures Figure 1, 2..3 Figure 3, 4..4 Figure 5, 6, Urban Forest Associates Inc. 2

3 A. Overview The property at 2964 Bristol Circle is a single-storey warehouse and office located in Oakville, Ontario. The company wishes to build an extension on the west side of the existing building. The City of Oakville Private tree by-law , amended in by-law , regulates all trees on the property that are 20cm DBH or larger. Trees in the City-owned boulevard are subject to by-law Tree protection is governed by policy EN-TRE-001. Figure 1: Panoramic view of the existing building and trees, facing north from Bristol Circle. Figure 2: Panoramic view of existing trees, facing south from the building. B. Trees and Site Description A site visit was performed on June 20, 2014 by Urban Forest Associates staff. Trees are only located at the front (south) end, with grass lawns, weedy herbaceous fields, and concrete surfaces throughout the rest of the property. The proposed building expansion area contains no trees, and all herbaceous species are non-native. Identified species include white clover, dandelions, cow vetch, oxeye daisy, bittersweet nightshade, thistle, chicory, bindweed, and birdsfoot trefoil. Some milkweed was identified near the front entrance, but not in the potential construction area. Urban Forest Associates Inc. 3

4 Figure 3: Panorama of north side of the building, facing south from the north property line. Figure 4: The proposed building expansion site contains only grass and a variety of non-native herbaceous species. Urban Forest Associates Inc. 4

5 Table 1. Tree Inventory for 2964 Bristol Circle. See Drawing AR-01 for locations. Data collected by Alex Karney, B. Sc., M.F.C., ISA Certified Arborist #ON-1674A, ISA Tree Risk Assessment Certified, on June 20, Canopy Tree Common Botanical DBH 1 Cond. 2 Width Ownership Remarks Action Request # Name Name (cm) (m) Norway maple Crimson King Norway maple Crimson King Norway maple Crimson King Acer platanoides Acer platanoides Acer platanoides 11.4 G 3.5 Private Healed wound on north side. Healed seam on west side. Healthy foliage. Retain 13.2 G 4.5 Private Retain 12.7 G 4.5 Private Healed seam on north side at base (0-1 m). Wound at base. 4 blue spruce Picea pungens 14.3 G 3 Private Retain 5 blue spruce Picea pungens 12.9 G 3.5 Private Retain 6 blue spruce Picea pungens 13.6 G 3.5 Private Some dead branches on north side (possible vehicle damage). 7 blue spruce Picea pungens 14.6 G 3.5 Private Retain 8 blue spruce Picea pungens 14.4 G 4 Private 9 green ash Fraxinus pennsylvanica Some dead branches on north side (possible vehicle damage) G 6 Private Emerald ash borer. Retain Retain Retain and Prune Remove emerald ash borer 1 DBH refers to stem diameter at breast height, measured in centimeters, at 1.4 m above the ground. 2 Condition (Cond.) refers to the general health of the tree assessed. Categories are defined as G = Good (healthy condition, with good form and structure), F = Fair (moderate health or less desirable form and structure), P = Poor (significant health concerns or extensive disease development and/ or less desirable form and structure), or D = Dead. Since trees were not sampled for internal rot or climbed to look for hidden rot or holes, there could be hidden hazards that were not detected in this survey. Urban Forest Associates Inc. does not accept responsibility for damages caused from hidden tree faults that were not detected by ground observations. Further investigation would be required by a qualified arborist for such an assessment. Trees were not assessed specifically for risks and a risk assessment is not provided or implied. Urban Forest Associates Inc. 5

6 Tree # Common Name 10 green ash 11 green ash Botanical Name Fraxinus pennsylvanica Fraxinus pennsylvanica DBH 1 (cm) Cond. 2 Canopy Width (m) 16.6 F 5.5 Private Ownership Remarks Action Request Thin crown. Borer exit holes. Dieback in crown G 6.5 Private Emerald ash borer. Remove emerald ash borer. Remove emerald ash borer. 12 English oak Quercus robur 12.5 G 3.5 Private Retain 13 Norway maple Crimson King Acer platanoides 14 English oak Quercus robur 15 Norway maple Crimson King 16 honey locust 17 honey locust Acer platanoides Gleditsia triacanthos Gleditsia triacanthos 10.5 F 2.5 Private 2m tall wound on north side. Retain m G 8 Private Retain 14.6 G 6 Private Unusual low branching. Retain 15.1 G 7 Neighbour East-heavy canopy. Retain 12.5 G 5.5 Town North-heavy canopy. Retain 18 Scotch elm Ulmus glabra 7.6 G 2.5 Town Retain 19 Norway maple Acer platanoides 8.3 G 3 Town Wound on south side at 1m, possibly from vehicle damage. Retain 20 English oak Quercus robur 15.2 G 5 Town Slight dieback on south side. Retain 21 green ash 22 green ash Fraxinus pennsylvanica Fraxinus pennsylvanica 11.3 P 5.5 Neighbour 11.0 P 6 Neighbour Mostly dead, many ash borer exit holes. Sprouting at base. Mostly dead, many ash borer exit holes. Heavy sprouting at base. Retain Retain Urban Forest Associates Inc. 6

7 C. Tree Protection, Removals, and Injury Tree impact during construction will be minimal as all construction is outside of tree protection zones, and it is highly unlikely that any tree roots will be located directly within the construction area. Tree protection fencing will be erected to prevent both damage from passing construction vehicles and the storage of any equipment within protection zones. See AR-02 for details of tree protection hoarding. 1. The goal of tree protection is always to prevent damage from occurring if trees are to be maintained in healthy condition and remain an asset to the owners. Damage to trees is cumulative and usually irreversible once it has occurred. There are very limited options to improve the health of trees damaged by construction, and these may be ineffective in any case. Mature trees do not respond well to large disturbances. 2. It is unlikely that tree roots will be located near the construction area, but any live roots that are discovered and cannot be avoided should be cut cleanly and not with construction machinery, by a certified arborist m tree protection fencing will be installed around existing trees at the front of the property according to City of Oakville guidelines as shown on drawing AR Bi-weekly inspections by UFORA staff shall be carried out during the entire construction period to ensure that tree protection remains in place and to monitor tree condition. Reports should be submitted to the owners and the City of Oakville each month. Any impacts to the trees should be remedied immediately. 5. Concrete must not be mixed near the tree protection zones and any wash water from concrete mixing must be directed into drains and not into the root zones of any trees. 6. Protected trees should be watered at least once per week with 2.5cm of water for the June to October season to maintain their health if no natural rain 10mm or over has fallen during that period. The addition of 10cm of pine bark mulch to the areas within the tree protection hoarding prior to construction will also help to retain moisture in the root zone. 7. We recommend the removal of trees 9-11, as they are infested with emerald ash borer (EAB) with little hope of recovery. The trees will be replaced with large-growing native shade trees. Urban Forest Associates Inc. 7

8 Figure 5: Tree 10 (middle) is infested with emerald ash borer (EAB) and showing substantial decline relative to other ashes on the property. Tree 11 (right) may be showing initial EAB stress. Figure 6: Advanced EAB decline on adjacent property to the west. Figure 7: EAB exit hole on tree 9. Urban Forest Associates Inc. 8

9 D. Tree Replacement In accordance with the landscape plan, the owners will plant 9 x 80mm wire-basket silver maples, 7 x 50mm wire-basket red oaks, 1 x 50mm wire-basket ironwood, in addition to 9 potted red-osier dogwood. See landscape plan and tree canopy plan (AR-03) for locations. The statement of Limiting Conditions of this Report, as presented in Appendix A, is an integral part of this report Report produced by Alex Karney, B. Sc., M.F.C. ISA Certified Arborist #ON-1674A Urban Forest Associates Inc. Urban Forest Associates Inc. 9

10 Appendix Limiting Conditions of this Report 1. Urban Forest Associates Inc. ( UFA ) has prepared this Report for use by the client named, only. This Report may not be relied on, in whole or in part, by third parties and UFA makes no representations or warranties to any such third parties whatsoever with respect to the appropriateness, accuracy or completeness of the information contained therein. 2. This Report has been prepared based in part on information provided to UFA by the client and by others. UFA does not guarantee the accuracy of such information. UFA is not responsible for any errors or omissions caused, directly or indirectly or in whole or in part, by any inaccurate or incomplete information provided by others. 3. It is understood that construction or landscaping work may be undertaken in relation to or based upon this Report. UFA will not be responsible for the appropriateness of any such work unless UFA is given the opportunity to comment in that regard, at the client s expense. After such consultation, if the scope or design of any such works undertaken changes, this Report may need to be modified to accommodate the new conditions. In such a circumstance the client must advise UFA of the nature of the changes and allow UFA, at the client s expense, to make any necessary changes, failing which this Report may not be relied on by the client. 4. This Report is not severable and UFA makes no representation or warranty to the client that any portion of this Report is accurate, appropriate or complete if that portion is excerpted from, or not read in context with, the remainder of the Report. 5. Unless otherwise agreed to in writing between the client and UFA; i. Information contained in this Report reflects, subject to item ii), below, the condition of the trees addressed in the Report, and grounds at the time of the inspection. Tree conditions may change at any time after inspection and we cannot guarantee that changes will not occur or will not materially affect the condition of the trees. Follow-up inspections should be arranged to verify tree condition periodically. ii. Inspections were carried out using currently accepted arboricultural techniques and are limited to what can be observed from ground observations without climbing, cutting, probing, coring, excavation, or snow removal. We are not responsible for any losses that may occur from conditions that could not have been observed by ground observations at the time that the inspection(s) was carried out. iii. Prior to the commencement of UFA s work on the Report, the client will provide UFA with information as to the location of property lines and the ownership of trees to be investigated by UFA. UFA may rely on the accuracy and completeness of all such information and shall not be liable for damages or costs resulting from any errors or omissions in that regard. Further, the client agrees to indemnify and hold harmless UFA from any claims made against UFA in relation to property line violations or ownership of trees. 6. The client agrees that the client s recovery from UFA for breach of this Agreement or for negligence in relation to this Report is and shall be limited to the limits of UFA s liability insurance in place at the time this Report is prepared. 7. Copyright in this Report and in any drawings or specifications prepared by UFA in that regard belongs to UFA and shall not be used by the client in relation to any other project. The client may retain copies of these documents for information and reference provided UFA has been paid in full for services rendered under this Agreement. Urban Forest Associates Inc. 10

11 N44 44'40"E LINE OF REQUIRED 3.0 M LANDSCAPED STRIP BUCKINGHAM ROAD WINSTON PARK DRIVE BRISTOL CIRCLE HIGHWAY 403 HAMPSHIRE GATE LINE OF REQUIRED SETBACK 4.0M FROM PROPERTY LINE LINE OF REQUIRED 3.0 M SIDE YARD SETBACK PROPERTY LINE N59 11'15"W CONCRETE SIDEWALK H H PROPERTY LINE LINE OF REQUIRED 15.0 M BUILDING SETBACK G F E EXISTING SINGLE-STOREY WAREHOUSE/OFFICE GRASS LAWN B R I S T O L C I R C L E LINE OF REQUIRED 15.0 M REAR YARD SETBACK N45 42'00"E D C B CONCRETE SIDEWALK A LINE OF REQUIRED 3.0 M SIDE YARD SETBACK N63 34'40"W SITE 2964 BRISTOL CIRCLE SINGLE STOREYWAREHOUSE/OFFICE BUILDING GROSS FLOOR AREA = 2, sm (26, sf)f.f.e. = QUEEN ELIZABETH WAY PLYMOUTH DRIVE COUVENTRY ROAD BRIGHTON ROAD WINSTON CHURCHILL BOULEVARD CITY OF MISSISSAUGA PORTLAND DRIVE BRISTOL CIRCLE HIGHWAY 05 DUNDAS STREET CITY OF MISSISSAUGA TOWN OF OAKVILLE NORTH SHERIDAN WAY BRISTOL CIRCLE HYDE PARK Existing Conditions AR-01 1:300

12 CITY OF MISSISSAUGA DAS STREET HIGHWAY 05 DUN 2'00"E LE CIRC BRISTOL E PARK DRIVE CIRCLE BRIGHTON ROAD CITY OF MISSISSAUGA COUVENTRY ROAD LINE OF R EQUIR DRIVE PLYMOUTH M RE AR YA BUCKINGHAM ED 15.0 BRISTOL CIRCLE WINSTON BRISTOL HIGHWAY 403 DEMOLISH EXISTING CURB RD S ETBA CK SITE PROPOSED CONSTRUCTION ROAD PROPOSED RETAINING WALL LINE OF REQUIRED SETBACK 4.0M FROM PROPERTY LINE PROPERTY LINE PROPOSED NEW CURB E D AG AN RB GE GA ORA P ST K-U PIC PORTLAND DRIV WINSTON CHURCHILL BOULEVARD N45 4 HAMPSHIRE GATE HYDE PARK NORTH SH ERIDAN WA STAGING AREA Y H WAY QUEEN ELIZABET TOWN OF OAKVILLE PROPOSED RETAINING WALL H F G E D C B A 5 D 3.0 M SIDE YARD WAREHOUSE/OFFICE SETBACK BUILDING EXISTING SINGLE-STOREY WAREHOUSE/OFFICE 3 GROSS FLOOR AREA = N63 34'40"W LINE OF REQUIRE LINE OF REQUIRED 3.0 M SIDE YARD SETBACK N59 11'15"W 4 PROPOSED EXTENSION 2964 BRISTOL CIRCLE SINGLE STOREYWAREHOUSE/OFFICE BUILDING GROSS FLOOR AREA = 2, sm (26, sf)f.f.e. = sm ( sf) 2 1 LINE OF REQUIRED 15.0 M BUILDING SETBACK H PROPOSED CONSTRUCTION STAGING AREA LINE OF REQUIRED 3.0 M LANDSCAPED STRIP N44 44'40"E PROPERTY LINE CONCRETE SIDEWALK CONCRETE SIDEWALK GRASS LAWN BRISTOL CIRCLE 09/04/15 ISSUED FOR CLIENT REVIEW 02/11/15 REVISIONS ISSUED FOR CLIENT REVIEW 03/23/15 REVISIONS ISSUED FOR CLIENT REVIEW 07/21/15 REVISIONS ISSUED FOR CLIENT REVIEW 12/22/15 REVISIONS ISSUED FOR CLIENT REVIEW Tree Protection Plan AR-02 1:300