A Dark Threat Looms

Thank the stars someone is concerned about the well-being of the Dam. First the destruction of the Thandol Span and then the pillaging of Dun Modr! I have no doubt that the Dam will be the target of the next Dark Iron threat. Most of the security detail here was reassigned to the Alliance Front, including my top inspector.$b$bThat's why I need you, $N. I spotted some Dark Iron Sappers milling about the eastern ramp of the Dam. Investigate the area and bring back a clue.