English: Dhopkols are with us for 120 years. It is an unique thing found only in Rajshahi. On 14 August, 1937 with the help of the donation of Maharani of Puthia Rani Hemanata Kumary Rajshahi Municipality established a water treatment plant for supplying pure water all over the city. The establishment was named Maharani Hemanata Kumary Water Works. Pipelines were installed and at most of the places concrete cylindrical water tanks were built so that water might be stored for common people for all hours. These water tanks came to known as Dhopkols.