Traditionally when it comes to installing sheet piling around a bridge pier or along an embankment we think of steel sheet piling.  Steel sheet piling are the most common, and have been one of the most effective methods of installing a deep foundation.  They have a long history of providing a robust barrier through shaped, interlocking sheets that can last for 75+ years. 

Preplaced aggregate concrete (PAC) is not a new concept.  In fact it is a method of concrete placement that has been around since the late 1930’s.  However, it is often overlooked as an option to repair dams and bridge piers.  In fact, it is one of the most effective forms of underwater concrete repair.