Arborist Reports for Development
An arborist report and legal tree survey are required when developing a site. Your arborist report must inventory and assess all the Bylaw protected trees on your property and any trees on adjacent properties that may be impacted by your development. The report will also require a tree assessment table and two different tree preservation summary sheets.
Included in the Tree Assessment Table and Tree Preservation Summary sheets are:
- All Protected Trees within the site.
- All trees on City boulevards (regardless of size).
- All trees being removed from future City roads that are being created as part of the subdivision agreement (roads that are not part of Engineering’s Capital Works Program).
- All trees within non-dedicated (private property) greenways and rights of way, and buffers.
- Excluded from the Tree Assessment Table and Tree Preservation Summary sheets are:
- All trees within dedicated park space (all trees within these areas are to be shown to be retained. Parks will determine at the time of clearing, whether or not some of them will be too hazardous to retain).
- All trees within dedicated and non-dedicated riparian area (all trees within these areas have to be retained).
Your report must also include a tree removal/retention plan and a tree replacement plan. The plans must include:
- Legible tree tag numbers and legible symbols indicating retention, removal, or replacement tree. Where landscape plans are required, the replacement trees are shown on the landscape plan rather than on the tree removal/retention plans.
- The plan must also include road names, north arrow, scale or bar scale (all plans sent digitally or otherwise re-scaled must have a bar scale), site address and project number.
- The tree location symbols are to be overlaid onto a plan showing the proposed site layout (roads, building footprints, etc.).
- The tree protection barriers with their dimensions.
- If the site is large, and it’s not possible to show all this information legibly on one 11 x 17 sheet, the site should be broken up into multiple sheets, with match lines indicating how the sheets fit together.
- If the developing site is large and covered by a closed-stand of cottonwood and alder, the individual cottonwoods and alders do not have be individually surveyed and assessed. The number of Protected Trees can be counted within a typical sample area of at least 10 m x 10 m, and the total number can be extrapolated from that sample area. However, any trees of other species growing within that stand need to be surveyed and assessed.
- For purposes of the Tree Preservation Summary sheets and the calculation of replacement trees:
-Any tree that is entirely within the developing site, and any shared tree (where any part of the trunk of that tree touches a property line shared with another privately owned property) is considered to be an on-site tree. However, the assessment table must indicate that the tree is a shared tree and a letter indicating agreement to remove the tree, signed by the co-owner of that tree, must be submitted along with the arborist’s report.
- Any tree that is entirely outside the developing site (no part of the trunk of that tree touches the property line) is considered an off-site tree. A separate tree cutting permit application signed by the owner of that tree is required, and separate fees and cash-in-lieu are required.
- Any tree that falls within an existing boulevard, or within a proposed road dedication area, or touches the property line separating private land from City land) is considered an on-site tree and is therefore subject to replacement tree requirements if it is being removed.
- Any tree that falls within a dedicated park area, dedicated greenway, dedicated riparian area, or dedicated natural area, is to be retained, and should be included in the line in the table that reads: “Protected Trees to be Retained in Proposed Open Space/Riparian Areas.”