Strategy for rehabilitation and strengthening of dam - A case study of Temghar dam

Dams contribute to development of civilization and help in meeting drinking water, irrigation and hydropower requirement and also for protection from catastrophic floods. To serve these purpose successfully throughout life span of dam, these dams needs proper maintenance and repairs to be done. The study represents strategy for rehabilitation of Temghar dam. Temghar dam has been constructed across Mutha River near Pune district of Maharashtra during the period March 1997-May 2010. Temghar dam is located on upstream of Khadakwasla dam, from where drinking water is supplied to Pune city and also severs for irrigation. Construction of temghar dam was completed in year 2010. Leakages in dam were observed from the time of construction in increasing trend with increase in reservoir storage level. Since Temghar dam was located on u/s of Khadakwasla dam, which was located on u/s of Pune city, it had high hazard potential in case of any mishap. So there was need for immediate action to be taken to reduce leakages and to look for safety of dam. Water Resources Department immediately started taking action for repair work of dam and started Grouting of dam body. Repair work of Temghar dam mainly includes Grouting of dam body and polypropylene fibre reinforcement shotcrete treatment to U/S side of dam. In year 2016 to 2019, 65% of Grouting work is completed and in season 2018-19, 10% of shotcrete work is completed. As a result of this repair work of dam Water Resources Department got success in reducing 90% of leakage to Temghar Dam.