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.<br>

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:<br>

'''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.

#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:

#Include data on critical feature elevations and existing utilities, such as:

***Inverts of newly installed pipe

***Inverts of newly installed pipe

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

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

Inspection Points:<br>

'''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<br>

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