<p><p><figure id='attachment_1592' style='max-width:605px' class='caption aligncenter'><img class="wp-image-1592" src="https://www.geoinstitute.org/sites/default/files/geotech-tools-uploads/…; alt="Photograph of a large crane and a 30 kips tamper used for dynamic compaction." width="605" height="814" /><figcaption class='caption-text'> Large crane and 14.0 Mg (30.9 kips) tamper for dynamic compaction (Photo courtesy of Elias et al. 2006).</figcaption></figure></p><p>This technique applies energy to the ground by raising and dropping a large weight repeatedly from a height of 30 to 120 ft. The technique densifies marginal materials (mainly granular materials with less than 15% fines) with an effective depth about 30 ft to 35 ft using high levels of impact energy at the surface. Advantages include suitable for many soil types, production of relatively uniform density, cost efficiency, and extensive applications in practice. This technique is applicable to new embankments and embankment widening overly unstable soils.</p><p>