The provisions office belonging to the Diez front has a length of 228 metres and is a so-called defensive building, replacing the main rampart at this point.
The building is constructed in a zigzag shape, the tenaillon shape, and can therefore face the trench, which is broken at right angles here, in two directions. The entire length of the outer side is set up for rifle and gun defence. No further trench defence was therefore required at this point, as the trench was defended from the battery casemates of the shanks. The other purpose of the building was to supply the military with provisions. Inside there are magazines, garrison bakeries, a slaughterhouse and bomb-proof war mills in the north wing, which were powered by the Queich.
Here at the Diez front is the transition from the dry to the wet ditch system. The Queich flows through the ditch in a narrow middle course, known as the "Künette", but in the event of war it was able to gain the necessary mass of water through damming to flood the ditch to the required width and height. The ditches of the Beckers, Schmauß and Lamotte fronts and part of Karl´s remained dry even when the Queich was dammed.