The Bagmati River Basin Improvement Project (BRBIP) has been envisioned to improve water security and resilience to potential climate change impact in the Bagmati River Basin with the support of the Asian Development Bank (ADB). It aims to build reservoir to charge the Bagmati River downstream and restore the river environment in the Kathmandu valley. The expected outputs of the Project are : Output 1 – Established systems and capacity for integrated and participatory river basin management, Output 2 – Improved Riverbank Environment in Urban Areas, Output 3 – Increased water availability in the basin during the dry season and watershed conservation and Output 4 – Functioning Flood Forecasting and Early Warning System for the Bagmati River Basin. The executing agency for the Project is the Ministry of Urban Development (MOUD) and the implementing agencies are The High-Powered Committee for Integrated Development of the Bagmati Civilization (HBCIDBC), Department of Water Resources and Irrigation (DoWRI) and Water and Energy Commission Secretariat (WECS).

Dhap Dam project is one of the main components of BRPIP project which is under the DoWRI, Project Implementation Irrigation Unit (PIIU) and plays a vital role to get an achievement of output 3, restoring the water constructing two dams (24m high Dhap Dam, 94.5m high Nagmati Dam) on the uphill of Bagmati River. The main objective of the Dhap Dam Project is to enhance water resources and increase water discharge to the Bagmati in the dry season, conserve terrestrial and aquatic biodiversity and maintain and enhance the river water quality establishing the Concrete Faced Rock filled Dam (CFRD) of 14,26,000 m3 of storage capacity. The dam will store monsoon rainfall and release to downstream during the non-monsoon season as per requirement.

Construction of The Dhap Dam is completed and O&M, SNNP and Security Post are under costruction. Approval of Operation, Maintanance and Surveillance manual, Emergency Action Plan and establishment of Dhap Dam management ofice are under the process of approvel.