STUDY ON THE WATERWORKS PLAN IN THE MIDDLE OF TAISYO ERA OF NAGAOKA CITY

This article examines the series of documents about the waterworks facilities in Nagaoka city, which the author obtained, and following points are clarified. The document introducing this time is the waterworks plan of Nagaoka city 1920 which had produced from August 1917 to March 1919, and the detail of the plan has never been introduced. The plan of 1920 was produced by Mr. Jiro Inoue who had worked for Fuji-Seisi. Comparing between the plan of 1920 and the plan of 1922, there are two remarkable differences. They are to have assumed the water intake point at Myouken of the Shinano River and to have arranged the clear water reservoir at the foot of the mountain Yukyusan in the plan of 1920. Since the plan of 1920 had difficulties in terms of the technique and the budget, in order to improve them, the plan of 1922 was drawn up.It is considered that Mr. Inoue was requested to produce the waterworks plan of Nagaoka city 1920 because he was an expert of the waterworks facilities in cold regions and he was freelance in those days.