<p><p><strong>References:<br></strong><em>Abu Al-eis and LaBarca (2007)<br>Gaspard and Morvant (2004)</em></p><p><strong>Method Summary</strong></p><p>String lines are usually set to monitor and verify elevation during the injection process. The change in elevation can also be monitored with a laser level or dial indicator devices.<strong> </strong></p><p><strong> </strong><strong>Accuracy and Precision</strong></p><p>Laser level and dial indicator devices are precise methods of monitoring ground movement.</p><p><strong>Adequacy of Coverage</strong></p><p>A laser level can be used for long sections.</p><p><strong>Implementation Requirements </strong></p><p>Setting up and checking string lines is expensive.</p><p><strong>General Comments </strong></p><p>A tight string line is used to monitor and verify elevation for slab lengths of 50 feet or less. For longer sections, a laser level will be used to monitor and verify elevation.</p></p>