To ensure a sustainable water supply for the future capital, IKN Nusantara, the IKN Authority officially signed contracts for the construction of vital reservoirs and retention ponds. These crucial water infrastructure projects will be developed within the Central Government Core Area (KIPP) 1B and 1C, in collaboration with prominent construction firms PT Bumi Karsa, PT Adhi Karya (Persero) Tbk, and PT Nindya Karya. The landmark agreement took place on Thursday, November 27, 2025, marking a significant step forward in the capital’s development.
The contract signing ceremony was executed by IKN Authority Commitment Officer XXII-2025, Iryans Muhyono, and Commitment Officer XXIII-2025, Sigit Marwanto. Representatives from each of the service providers were present, with the entire proceedings witnessed by the Head of the IKN Authority, Basuki Hadimuljono, underscoring the high-level commitment to these developments.
This strategic move emphatically underscores the IKN Authority’s unwavering determination to accelerate the development of essential water infrastructure. Such foundational elements are paramount for creating a capital city that is inherently safe, resilient, and demonstrably climate-adaptive. Basuki Hadimuljono lauded this approach, recognizing it as a pivotal component in the rapid progress of Nusantara’s development.
“This signifies that IKN’s development is indeed continuously advancing, and we are committed to completing it within a relatively short timeframe, well before 2028,” Basuki stated. He elaborated on the specifics, referencing information previously shared by Agus Ahyar, Director of Social Facilities and Infrastructure: “These new reservoirs, as Agus Ahyar conveyed, are part of our plan to build 24 new water bodies with a total capacity of 2 million cubic meters. This will substantially augment the existing 2 million cubic meters already provided by 30 operational reservoirs.”
The integration of these reservoirs and retention ponds plays a strategic role in supporting the innovative “Zero Delta Q” or “Sponge City” concept being implemented throughout Nusantara. This sophisticated infrastructure is meticulously designed to effectively hold, absorb, and control surface water flow. By doing so, it significantly mitigates the risk of excessive flooding and diligently maintains the critical hydrological balance of the entire region, safeguarding the urban environment.
Consequently, this large-scale development simultaneously strengthens the broader system of sustainable water conservation. It also substantially enhances the environmental resilience of the capital, fortifying its ability to withstand the challenges posed by climate change and its various impacts.
Beyond their crucial conservation functions, these newly integrated water bodies are poised to impart significant aesthetic value to the Central Government Core Area. The presence of reservoirs and retention ponds will beautifully enhance the urban landscape, creating expansive green open spaces. This artistic integration further solidifies Nusantara’s distinctive character as a truly green capital – one that is shaded, serene, and harmoniously balances cutting-edge modern development with the preservation of its natural environment.
These thoughtfully designed spaces will also serve as dynamic hubs for social interaction, public recreation, and a variety of community activities. By fostering such engagements, they are set to significantly enhance the overall quality of life for Nusantara’s residents, promoting a vibrant and connected urban experience.
Additional multifaceted benefits include the provision of a secondary raw water reserve, vital for urban functions such as park irrigation and fire fighting. Furthermore, these water features naturally contribute to lowering ambient air temperatures within their vicinity. With their comprehensive capability to control both micro and macro-scale flooding, these reservoirs and retention ponds are indispensable components in building Nusantara’s foundational infrastructure — ensuring it is secure, adaptable, and ultimately, sustainable for generations to come.
Summary
The IKN Authority has signed contracts for the construction of vital reservoirs and retention ponds in the Central Government Core Area (KIPP) 1B and 1C of IKN Nusantara. This initiative, involving PT Bumi Karsa, PT Adhi Karya, and PT Nindya Karya, aims to ensure a sustainable water supply for the future capital. These projects are part of a plan to add 24 new water bodies with a 2 million cubic meter capacity, significantly augmenting existing reserves and accelerating essential infrastructure development before 2028.
This strategic infrastructure supports the “Zero Delta Q” or “Sponge City” concept by effectively managing surface water flow and mitigating flood risks. The new reservoirs and retention ponds will strengthen sustainable water conservation, enhance environmental resilience against climate change, and provide aesthetic value as green open spaces. Beyond crucial functions, they will also serve as hubs for social interaction and recreation, contributing to a secure, adaptable, and sustainable capital.
