In India, coal-based thermal power plants are a major source of power generation and by the end of 2020, approximately 82,200 hectares of land will be utilized as ash lagoons. Once the capacity of lagoons is reached, they are closed in compliance with the statutory regulations. Recent trends suggest that these lands could be reclaimed, and light to heavy weight structures such as parking lots, gas stations, solar panels for power generation, etc., can be built over them. In-situ dynamic characterization is essential for such reclaimed sites to ensure safety of structures built over them. This paper presents the in-situ dynamic characterization, in terms of shear wave velocity (Vs), of two hydraulically deposited coal ash lagoon sites located in Central India using Multichannel Analysis of Surface Waves (MASW) technique. Shear wave velocities of deposited ash are found to range from 120 – 170 m/s at different depths of these ash lagoons, and the sites are classified as per the recommendations of National Earthquake Hazard Reduction Program (NEHRP) and International Building Code (IBC). © 2019 Associazione Geotecnica Italiana, Rome, Italy.