Breadcrumb Home Video content The main stages in drilling a borehole Video content The main stages in drilling a borehole Share and save Drilling of a borehole in Issoudun so as to be able to constantly measure the level of the Berry water table. 15 June 2015 Groundwater Centre-Val de Loire region Discovering the Earth Sciences Citizen, citizen's group Student Teacher, pupil The main stages of the drilling operation – using the "Down-the-hole hammer" method. Example of a borehole in Issoudun, the objective being to monitor level of the Berry water table (Upper Jurassic limestone). In 2014, the structure was fitted with equipment to constantly measure the water table level. Film produced for the SIGES Centre (Indre, 2014). © BRGM Visit BRGM's YouTube channel More news Annual report BRGM's annual report for 2025: a year of transformation and growth 10 July 2026 Press release Groundwater tables on 1 September 2026 8 August 2026 Annual report Mineral resources: OFREMI publishes its 2025 annual report 25 August 2026 News Groundwater levels on 15 August 2026 20 August 2026 All our news
In 2014, the structure was fitted with equipment to constantly measure the water table level. Film produced for the SIGES Centre (Indre, 2014).