Koishiwara River Dam is under construction on the Koishiwara River, part of the Chikugo River system. The dam is being built to reduce downstream flood damage through streamflow regulation and to secure water volume to meet increasing water demand (agricultural, industrial, and domestic water supply). It is approximately 139 m high and 550 m wide (crest length), with a reservoir area extending about 1.2 km².
Since the dam was constructed, signs of abnormality have been detected from daily inspections. For civil engineering structures such as the dam body and inspection gallery, inspections include visual inspection for any water leaks and cracks, as well as measurements of osmotic pressure, water quality, etc. Also, it is important to understand the condition of the facility when construction began and how it has changed over time, and to take preventive measures, just as daily and regular inspection results must be recorded as systematic electronic data on an ongoing basis. Therefore, in order to properly maintain dams and other large structures, such data must be centrally managed to remain accessible.
With the aim of improving the efficiency of operation and maintenance of Koishiwara River Dam from initial filling until dam operations, this project developed a construction information management (CIM) system for dam O&M. Additionally, various possible ICT were also tested for use at Koishiwara River Dam.