A runner is dispatched along the river bank to bring help and warn the dam workers, leaving Elagn with five workers and two soldiers. They begin using improvised levers to pry at the debris, given that the crane is nonmobile. One of the soldiers brought a stick of dynamite, which might be used effectively if a hole was opened into the debris pile.
The Mayor's group smashes through the last of the stone, breaking out into a little box canyon on the backside of the mountain. All sixty Elite Guards, with twenty Musketeers backing them up, pour through the gap the instant the miners move aside, forming a defensive cordon at the mouth of the canyon, with five of the more skilled marksdwarves and their crudely rifled guns clambering to the top of the canyon walls for an overwatch.
Behind the specialist soldiers, another forty or so dwarves, largely Light Infantry with a smattering of Settlers, Woundbinders and Serf workers with improvised weapons, file out of the gap. The Serfs set up a portable steel door against the hole even as the Miners finish roughly squaring the edges, hammering pylons into the canyon wall and bending them over to lock it in place. The Light Infantry stick the butts of their spears into the ground at the canyon mouth to create a crude barricade, then begin using their earthworking axes to build simple fortifications from the dry dirt and gravel.
The Settlers and Woundbinders await Mayoral orders to begin the trek around to the original fortress entrance, in hope of survivors, or perhaps a slightly more positive impression of the damage than at first.