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mLine 74:
Line 74: !Planting medium depth !Loading !Cost !Maintenance !Stormwater benefit !Biodiversity benefit !Amenity benefit
→Pre-Construction (KM)
'''Design verification and site walk-through'''<br>
'''Design verification and site walk-through'''<br>
{|class="wikitable"
{|class="wikitable"
|+ Types of green roofs: defined by construction depth
|+ Design verification points and key considerations
|-
|-
!Verification point
!Verification point
!Key considerations
!Key considerations
|-
|-
|Adjacent land uses||- Have land uses changed while the design was in progress? Are there any planned land-use changes on adjacent properties and is their drainage connected to the site soon to be under construction?
|10 - 15 cm||> 15 cm
- Will it create dirty runoff that may flow onto the construction site or into the LID feature?
- Is additional ESC required beyond what is marked in the ESC plan?
|-
|-
|up to ~250 kg/m<sup>2</sup>||Limitless where 'roof' is at ground level
|Contributing and receiving drainage areas||- Where is water coming onto the site and where is water leaving the site?
- Are any environmentally sensitive areas downstream?
- Are there any apparent changes while the design was in progress? If so, should these changes necessitate modifications to the design, particular ESC measures, etc.?
|-
|-
|Typically lower||Higher, including structural accommodations and plant selection
|Seasonal maintenance operations||- Will winter snow storage and salt application impact the functionality of the LID feature?
|-
|-
|Depends highly on the aesthetic expectations of stakeholders||Will be comparable to other landscapes, depending on access requirements.
|Location of LID features||- Do the proposed LID locations match the site?
-Does the footprint of the LID fit within the site constraints?
|-
|-
|Provides best cost-benefit balance||Varies highly
|Existing and planned infrastructure / utilities||- Confirm accuracy of design drawings
- Are there any unmarked utilities not detailed within drawing set?
|-
|-
|Lower, depends on planting||Greater potential, depends on planting
|Property boundaries and building foundations||- Confirm accuracy of design drawings
- Do fence lines align with property boundaries?
|-
|-
|Usually visual only<br>i.e. inaccessible||Often accessible
Natural heritage features and existing vegetation ||- Do the designs accurately capture existing natural heritage features? Which areas on the site should be protected during construction, and will these exclusion areas make the LID facility more difficult to construct? Where are the tree drip lines?
- Are there any invasive species on the site which could colonize the LID practice?
|Access, sequencing, staging, and constructability ||- Where will the contractor access the site?
- If applicable, where can materials and/or equipment be stored
- What is the ideal construction sequence, and where could materials and supplies be stored during construction?
- Do site characteristics constrain standard construction practices? Will it be a difficult job?
- Do constructability issues require a field change or amendment to the tender?
|}
|}
'''Installation of ESC and Construction Fencing'''<br>
'''Installation of ESC and Construction Fencing'''<br>