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| Throughout the construction process, it is sometimes necessary to deviate from the intended design of LID features and adapt the design to on-site conditions. The completion of a post-construction as-built survey is a standard operating procedure for engineering projects that captures any changes made to the feature’s design during construction. | | Throughout the construction process, it is sometimes necessary to deviate from the intended design of LID features and adapt the design to on-site conditions. The completion of a post-construction as-built survey is a standard operating procedure for engineering projects that captures any changes made to the feature’s design during construction. For an example of municipal standards for as-built surveys, refer to the City of Toronto's [https://www.toronto.ca/wp-content/uploads/2017/11/98c7-ecs-specs-surveys-engsrv_survey_standards_for_consultant.pdf Engineering Survey Standards for Consultants]<ref>City of Toronto. 2021. Engineering Survey Standards for Consultants. https://www.toronto.ca/wp-content/uploads/2017/11/98c7-ecs-specs-surveys-engsrv_survey_standards_for_consultant.pdf</ref> |
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| '''Survey Steps:''' | | '''Survey Steps:''' |
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| #If a pre-engineering survey is not available, use a reference feature as the datum. | | #If a pre-engineering survey is not available, use a reference feature as the datum. |
| #Identify the type, diameter, and material of exposed utilities. | | #Identify the type, diameter, and material of exposed utilities. |
| #Include data on critical feature elevations and existing utilities, such as:<ref>https://www.toronto.ca/wp-content/uploads/2017/11/98c7-ecs-specs-surveys-engsrv_survey_standards_for_consultant.pdf </ref> | | #Include data on critical feature elevations and existing utilities, such as: |
| **Inverts of newly installed pipe
| | #*Inverts of newly installed pipe |
| **Vertical and horizontal bends in pipes
| | #*Vertical and horizontal bends in pipes |
| **Existing public utilities
| | #*Existing public utilities |
| **Existing private utilities
| | #*Existing private utilities |
| **New and existing structures (e.g., catchbasins, manholes, chambers, etc.)
| | #*New and existing structures (e.g., catchbasins, manholes, chambers, etc.) |
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| '''Inspection Points:''' | | '''Inspection Points:''' |
| *Datum matches the pre-engineering survey or selected reference feature. | | *Datum matches the pre-engineering survey or selected reference feature. |
| *Data provided in as-built survey matches the as-built standards of the local municipality. | | *Data provided in as-built survey matches the as-built standards of the local municipality. |
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| <references/>
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