During post-Independence period when there was unrest among employees of Indian origin against British colonial rule State Engineers’ Association, Bengal was formed in the year 1920. This Association comprised of the Engineers of Indian origin of Public Works and Irrigation Departments, In the year 1920 the Indian Service of Engineers was created in place of Imperial Service. In the same year, the irrigation Department was separated from Public Works Department. At that time the Chief Engineer & Secretary of Public Works Department was Charles Peregrine Walsh and the Chief Engineer & Secretary of Irrigation Department was Christopher Adams William.