Changes

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.<sb>

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.<br>

Survey Steps:

Survey Steps:<br>

#Use the same datum as the pre-engineering survey

#Use the same datum as the pre-engineering survey

#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

*Existing public utilities

*Existing public utilities

*Existing private utilities

*Existing private utilities

*New and existing structures (e.g., catchbasins, manholes, chambers, etc.)<sb>

*New and existing structures (e.g., catchbasins, manholes, chambers, etc.)<br>

Inspection Points:<sb>

Inspection Points:<br>

*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<sb>

*Data provided in as-built survey matches the as-built standards of the local municipality<br>