 Gabrielli had awarded individual segments of the project to sub-contractor.The tunnel work had been given to Franz Schlögl, a Viennese architect, who was not up to the task and was removed from the project in August, 1870.Falling further behind from delays in deliveries, Gabrielli turned to the Minister of War to help with the tunnel but, instead of the 250 men he requested, he was assigned only 70 sappers.