Tree Inventory & Assessment Rondel Court Apartments

Molalla, OR

Prepared for: Trell Anderson

Catholic Charities 2740 SE Powell Blvd., #7 Portland, Oregon 97202

c/o Housing Development Center

847 NE 19th Ave, Ste 150 Portland, OR 97232

Prepared by: Oregon Tree Care 7609 Overland St.

Milwaukie, OR 97222

December 2, 2015

RE Tree assessment and inventory for trees located on the Rondel Court Apartments property in response to planned construction activities.

Date December 2, 2015

Attention Trell Anderson c/o Mai Hunyh-Carnes, mai@housingdevelopmentcenter.org

Site Address 180 Fenton Street, Molalla Oregon 97038

Contents

Assignment & Scope of Report

Limits of Assignment

Methods

Observations & Statements

Preservation Zoning

Appendix A – Photographs, Maps & Inventory

Appendix B – Assumptions & Limiting Conditions

Appendix C – Glossary

Assignment & Scope of Work We were contacted on November 23, 2015 by Mai Huynh-Carnes on behalf of the Housing Development Center (HDC) and Catholic Charities to provide our arboricultural services. Oregon Tree Care (OTC) then provided an assessment for the list of trees submitted by HDC, to determine if the specific trees could be preserved through the planned construction. A visual assessment of 8 trees total was to be carried out as well as an identification and inventory of the trees. The data collected would then be summarized in this Report with our recommendations for risk mitigation and protection plans. Limits of Assignment Unless stated otherwise: 1) Information contained in this report covers only those trees that were examined and reflects the condition of those trees at the time of inspection; and 2) The inspection is limited to visual examination of the subject trees without dissection, probing, or coring unless explicitly specified. There is no warranty or guarantee, expressed or implied, that problems or deficiencies of the subject trees may not arise in the future. Additional Assumptions and Limiting Conditions can be found in Appendix B. Methods We used a Visual Tree Assessment (VTA) method to evaluate tree health and structure. VTA is based on the outward indications of tree stress and growth, as indicated by the formation of new tree parts, the shape of the new wood and the amount of live tissue. Trees adapt to current and past stress by growing wood to support themselves in an upright condition. This type of assessment is facilitated by our personal knowledge of tree growth as it relates to structural integrity. We used a diameter tape marked in inches on one side and with diameter calculations on the opposite for measuring tree diameter. Roots that would potentially be impacted during construction were noted with recommendation for further assessment via Air Spade equipment. The Air Spade is an attachment added to the terminal end of an air compressor hose. The compressed air is directed into the soil, fracturing the soil and exposing the roots below the soil surface. This method is low-impact. Root excavation was targeted primarily by locations where digging for planned construction would occur within a close proximity of, or breach, the Critical Root Zone (CRZ). Observations & Statements VTA’s were given for each of the eight (8) trees. These assessments were completed as the trees stand now with targets that currently exist. However, recommendations for risk abatement in this report are partly based on development plans and predicted changes that this site will likely incur. After the development project is completed the targets and associated risk will certainly change.

The site visit was conducted during a dormant season (i.e. Fall and Winter months) where foliage is not typically present for many of the trees. Thus, the vigor rating is based on any signs of decay, structural integrity concerns or defects and/or overall appearance of the tree in its current state.

Notable Concerns and Corrections from the Site Visit

1. Pin Oak (labeled as “1” on Map 2 in Appendix A) is a significant tree to the property due to its size and overall health rating. At the time of the site visit, it appeared healthy with average vigor and a good canopy-to-crown ratio. Based on the information provided by the project architect, Carleton Hart Architecture, the new building footprint “from center of trunk to edge of community building wall” is approximately 8’7” (103 inches). The Critical Root Zone (CRZ) for this tree is approximately 6’ (70 inches). Though the footprint is more than 2’ from the determined CRZ, the large canopy lends itself to concern to the roots extending beyond the CRZ and dripline that will be exposed, severed or cut during construction activities. A general rule to follow: if more than 20% of the tree roots are cut, the tree is considered a loss. This generality does not take into account other conditions lending concern for the trees overall health and integrity. In reviewing the immediate conditions, existing and planned, around the circumference of the tree the adapted growth pattern lends itself to considering the tree has compensated for the close proximity to the existing building by spanning anchoring roots and structural systems outward toward the more open areas (i.e. future building footprint). The current building is with within critical range of the tree, however, the tree appears to have adapted over time for the constricted growth space on that side. Based on the site plan for the new construction, the tree will experience ground disturbance on all remaining angles (this takes into account the actual building construction, high-traffic areas during construction, height of planned building for potential canopy loss concerns and any proposed access points for the area (i.e. pathways, sidewalks, etc.). It is important to consider, the calculations for this specific tree in relation to industry standards sit at the cusp of what would be deemed “minimum standards”; meaning, even though the footprint is outside the critical measurements, it is essentially within range of critical impact (i.e. close enough to cause a grey area of concern). Considerations in determining the ultimate preservation/removal status of the tree: Air Spading be conducted within an identified area to determine if the root loss will exceed the

maximum recommended to maintain the structural integrity of the tree. Working with the architect, the specific area of concern will be determined based on the planned footprint of the new building and any other area where ground disturbance will occur from the dripline/CRZ (whichever is greater) and the planned digging/trenching/etc.

o With a high target rating, any concern with the integrity of the tree to withstand the construction activities should be addressed. Additionally, with the close proximity of the tree to the planned construction, proactive pruning should be conducted prior to commencing construction activities and especially prior to any necessary root pruning.

Figure 1: Pin Oak (Inventory Tree #1)

Preserving the tree with proper precautions would include air spading, proactive pruning, consistent monitoring (every 4-6 months for the first couple of years and then annually), dense nutrient applications and a strict preservation zone.

o It is important to note that even with mitigation, constant monitoring, etc. it is not a guarantee the tree will acclimate to the changed environment and surroundings.

To mitigate any potential risk, full tree removal would be required.

2. Oregon Cherry ‘Rainier’ (labeled as “2” on Map 2 in Appendix A) was misidentified on the site map as a Dogwood. The tree is multi-stem with signs of apparent storm damage. Restoration pruning is recommended to improve the overall appearance, balance and to flush the wounds to mitigate concern.

3. Pin Oak (labeled as “5” on Map 2 in Appendix A) appears to have undergone aggressive pruning for

power line clearance. Though the tree has average vigor, pruning is recommended for the lateral leaders to help compensate for the prior pruning.

4. Lodgepole Pine (labeled as “6” on Map 2 in Appendix A) was misidentified on the site map as an Oak.

Figure 2: Oregon Cherry (Inventory Tree #2)

Preservation Zoning Based on the description of work to be performed for site development, the following recommendations are offered to preserve the current health of the trees and to lessen the negative impact to the trees due to the work performed. PROTECTIVE BARRIER should be installed around each tree before work begins and through the duration of work to prevent traffic, equipment, etc. from encroaching within the dripline of each tree. If utilities are to be installed within the dripline of the subject trees, the Protective Barrier should be set at the maximum distance from the trunk to the construction impact zone. The supply and erection of this fencing should be planned as the first priority of operation and should be processed before any other work takes place on the site. The removal of the Tree Protection Fencing should be one of the last operations undertaken on the site. A tree protection zone is recommended for all trees to be preserved. Though excavation may not be occurring in the immediate area of the tree and root zone, activities associated with development can alter the conditions of the surrounding landscape and grounds, which could impact the health of the trees due to compacted soils, damage to tree limbs, trunk, etc. CERTIFIED ARBORIST ON SITE: It is highly recommended to have a Certified Arborist on site when construction activities occur near trees to be preserved. ROOT PRUNING: If, during the construction, root pruning is required due to exposed or severed roots, the following process should be followed to prevent further damage. It is highly recommended that a Certified Arborist supervise and/or complete the root pruning. Additionally, pruning of the tree branches may be necessary to help compensate for any root loss.

Do not use an excavator to pull or cut roots By hand, dig out and around the exposed or severed root prior to cutting Only use a chainsaw with sharpened blades to provide a clean cut Apply root toner on severed root ends

ANNUAL MONITORING: All preserved trees should be monitored annually for changes and/or signs of stress after construction activities are completed.

Appendix A – Photographs, Maps & Inventory

Map 1: This Google satellite map offer a view of the trees at Rondel Court.

Map 2: Site Plan provided by client. The green circles in the map above indicate the 8 trees noted for inclusion in this report.

Map 3: Tree Survey provided by client.

Map 4: Site Plan showing distance from Oak Tree (#1 on inventory) to edge of foundation for new building.

Tree Inventory

Oregon Tree Care . Tree Inventory(marked in green only)

1 2

34

5

67

8

______

___

CHERRY

PINE

EXISTING MAPLE

EXISTING PINE

Page 1 of 1

OREGON TREE CARE . TREE INVENTORYLOCATION:

SITE VISIT DATE:

CERTIFIED ARBORIST:

Map ID Number Size (dbh) CRZ (inches) VigorPreserve or

Remove?

1 48 72.00 Average See Report

2 10 15.00 Average Preserve

3 12 18.00 Average Preserve

4 10 15.00 Average Preserve

5 12 18.00 Average Preserve

6 12 18.00 Average Preserve

7 10 15.00 Average Preserve

8 26 39.00 Average Preserve

Pin Oak

Lodgepole Pine

Lodgepole Pine

Pin Oak

Norway Maple

Prunus avium 'Rainier'

Pinus contorta

Pinus contorta

Quercus palustris

Acer platanoides

180 Fenton St, Molalla OR

Damien Carre . PN-6405A

Tree Genus Species

Quercus palustris

December 2, 2015

Tree Common Name

Oregon (Rainier) Cherry

Lodgepole Pine Pinus contorta

Norway Maple Acer platanoides

Appendix B - Assumptions & Limiting Conditions

1. Consultant assumes that any legal description provided to Consultant is correct and that title to property is good

and marketable. Consultant assumes no responsibility for legal matters. Consultant assumes all property appraised or evaluated is free and clear, and is under responsible ownership and competent management.

2. Consultant assumes that the property and its use do not violate applicable codes, ordinances, statutes or regulations.

3. Although Consultant has taken care to obtain all information from reliable sources and to verify the data insofar as

possible, Consultant does not guarantee and is not responsible for the accuracy of information provided by others.

4. Client may not require Consultant to testify or attend court by reason of any report unless mutually satisfactory contractual arrangements are made, including payment of an additional fee for such Services.

5. Unless otherwise required by law, possession of this report does not imply right of publication or use for any

purpose by any person other than the person to whom it is addressed, without the prior express written consent of the Consultant.

6. Unless otherwise required by law, no part of this report shall be conveyed by any person, including the Client, the public through advertising, public relations, news, sales or other media without the Consultant‘s prior express written consent.

7. This report and any values expressed herein represent the opinion of the Consultant, and the Consultant’s fee is in

no way contingent upon the reporting of a specific value, a stipulated result, the occurrence of a subsequent event or upon any finding to be reported.

8. Sketches, drawings and photographs in this report, being intended as visual aids, are not necessarily to scale and

should not be construed as engineering or architectural reports or surveys. The reproduction of any information generated by architects, engineers or other consultants and any sketches, drawings or photographs is for the express purpose of coordination and ease of reference only. Inclusion of such information on any drawings or other documents does not constitute a representation by Consultant as to the sufficiency or accuracy of the information.

9. Unless otherwise agreed, (1) information contained in this report covers only the items examined and reflects the

condition of the those items at the time of inspection; and (2) the inspection is limited to visual examination of accessible items without dissection, excavation, probing, climbing, or coring. Consultant makes no warranty or guarantee, express or implied that the problems or deficiencies of the plans or property in question may not arise in the future.

10. Loss or alteration of any part of this Agreement invalidates the entire report.

Appendix C – Glossary

Anchor Root: A large roots that hold a tree in place in the soil. Critical root zone (CRZ): Portion of the root system that is the minimum necessary to maintain vitality or stability of the tree. Encroachment or damage to the critical root zone will put the tree at risk of failure.

DBH: Diameter at Breast Height, typically measured at four and a half feet from ground level. Dormant: A period in an organism's life cycle when growth, development, and (in animals) physical activity are temporarily stopped. This minimizes metabolic activity and therefore helps an organism to conserve energy. Dormancy tends to be closely associated with environmental conditions. Dripline: The width of the crown, as measured by the lateral extent of the foliage. Leader: The topmost portion of the tree trunk (stem) that is able to grow more than the laterals below. Multi-stem: Trees with two or more main stems extending from or near ground level, growing from one root system. Risk: Likelihood or probability that something will happen. Usually associated with negative consequences. In tree management, the likelihood that a tree or tree part will fall and cause injury or damage. Target: Person object, or structure that could be harmed by a tree or tree part in the event of failure. Pruning: The act of sawing or cutting branches from a living tree generally involving thinning, deadwood removal and weight reduction to improve the overall health of a tree. The species and size/age of the tree will determine the proper amount of reduction and type of cuts performed. Protective Barrier: Used during land alteration and construction activities to protect trees and natural areas to be retained on a site and must be erected around trees to be retained within an area where land alteration and construction activities will occur. A PROTECTIVE BARRIER must remain in place until the land alteration and construction activities are completed. No ground disturbance must occur within the barricaded area. Stress: Unfavorable deviation from normal. In arboriculture, the adverse alteration of tree health by abiotic or biotic factors.

OTC Cares

Caring for our environment stems from a deep knowledge of trees. How they work, what keeps them healthy, and knowing when to remove a hazard tree is all part of our training. The International Society of Arboriculture (ISA) sets the industry standard for proper care. Our Certified Arborists are tested and approved by the ISA. With annual education requirements, we stay current in our knowledge and qualifications.

Respectfully Submitted,

Damien Carré – Owner

• Certified Arborist, ISA (PN-6405A) • Certified Tree Risk Assessor (CTRA 1717) • Over 17 years’ experience in the arboriculture industry • TCIA, ISA, PNW-ISA Member • Ascending the Giants, Board Member • WesSpur, Resident Training Specialist for Aerial Rescue and SRT programs • PNW-ISA, member representative for course design and setup to the Local, Regional,

National and International Climbing Championships

Disclaimer

Arborists are specialists in tree management and care who use their education, knowledge, training and experience to inspect and assess tree health and condition, recommend measures that are likely to enhance the health and beauty of trees, and attempt to identify measures that reduce risk of personal injury or property damage from trees exhibiting defects. Clients may choose to accept or disregard the recommendation of the arborist, or to seek additional advice. Arborists cannot detect every condition that could possibly lead to the structural failure or decline in health of a tree. Trees are living organisms that fail in ways we do not fully understand. Conditions are often hidden within trees and below ground. Arborists cannot guarantee that a tree will be healthy or safe under all circumstances, or for a specified period of time.

Likewise, the response to any remedial treatments, like any medicine, cannot be guaranteed. Treatment, pruning or removal of trees may involve considerations beyond the scope of the Arborist’s services such as property boundaries, property ownership, site lines, disputes between neighbors and other issues. Arborists cannot take such considerations into account unless complete and accurate information is disclosed to the Arborist. An Arborist should then be expected to reasonably rely upon the completeness and accuracy of the information provided.

In order to accomplish a full assessment and to produce the best information, historical data on each tree (from past observations and reporting) should be provided in accordance with standard systematic tree assessment practices. OTC sincerely has the interest of not only the tree and the environment in mind, but also the residents.

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