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The Niemeyer project at the Encontro das Águas Park in Manaus advances with the concreting of the beams and the big slab of the oca, using 380 m³ of concrete in an operation with up to 60 concrete mixer trucks, technological control, and synchronized execution by the Manaus City Hall in this structural stage of the monumental construction.
The Niemeyer project in Amazonas advanced with a decisive stage of the construction of the monumental oca at the Rosa Almeida Encontro das Águas Park in Manaus. The concreting of the beams and slabs mobilized an estimated volume of 380 m³ of concrete, equivalent to about 50 to 60 concrete mixer trucks.
The information was published by the Manaus City Hall on February 13, 2026. According to the statement, the operation began at 7 am, continued throughout the day, and went into the night, marking a structural advance in the multi-use space designed to integrate architecture, tourism, leisure, and the Amazonian landscape.
First Niemeyer project in Amazonas advances in Manaus
The first Niemeyer project in Amazonas is being executed at the Rosa Almeida Encontro das Águas Park, in the Colônia Antônio Aleixo neighborhood, East zone of Manaus. The project brings Oscar Niemeyer’s characteristic curves to an area connected to one of the region’s most well-known natural phenomena: the meeting of the Negro and Solimões rivers.
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The construction of the oca is treated as one of the central points of the park, both for its visual impact and engineering complexity. The proposal combines monumental architecture and appreciation of the Amazonian landscape, creating a multi-use space designed for culture, interaction, and contemplation.
Big slab mobilizes up to 60 concrete mixer trucks
The stage called “big slab” involved the concreting of the beams and slabs of the oca, with an estimated use of 380 m³ of concrete. The volume corresponds to approximately 50 to 60 mixer trucks in a single operation, concentrated throughout the day and extended into the night.
This type of concreting requires planning because the supply needs to occur continuously. An interruption in a stage of this magnitude could compromise the execution pace, so the operation was organized with simultaneous fronts and exclusive service from the concrete supplier to the construction site.
Concreting marks the structural stage of the oca
The concreting of the slab represents an important phase because it prepares the structure for the next elements of the oca. According to the Director of Planning of the Municipal Urban Planning Institute, Pedro Paulo Cordeiro, the slab integrates a set of forces that also involves the dome and the shafts.
In practice, the structure does not function as isolated pieces but as a system. Slab, dome, and shafts need to balance within the architectural design, especially in a construction that also has symbolic and visual functions within the Parque Encontro das Águas.
Dome and shafts will be the next challenges
After the big slab, Niemeyer’s work enters a phase focused on the dome and shafts of the oca. According to engineer Leandro Ladeira, the shafts will be 21 meters high, while the dome will have about 7 meters of ceiling height.
These elements are expected to reinforce the monumental presence of the construction in the park. The next stage requires precision because the oca will be one of the visual landmarks of the complex, interacting with the natural landscape of the Encontro das Águas and with the architectural language associated with Niemeyer.
Technological control monitors the concrete on-site
The operation included a company responsible for the technological control of the concrete on the construction site. This monitoring is used to verify the material conditions during execution, especially in large-volume concreting.
According to the Manaus City Hall, the concrete supplier was exclusively dedicated to the work during the day. The synchronization between the laboratory, field teams, and concrete supply was essential to maintain the concreting pace, as the big slab depended on continuous and coordinated execution.
Park will have a viewpoint, restaurant, and green areas
The Rosa Almeida Meeting of the Waters Park will have more than 120 thousand square meters of area and a viewpoint for the meeting of the Negro and Solimões rivers. In addition to the oca, the complex is expected to include a restaurant, kiosks, green areas, trails, contemplation spaces, and social structures.
The project also plans for full accessibility, reinforcing the proposal to transform the area into a public space for tourism, leisure, and environmental appreciation. Niemeyer’s work appears as the centerpiece of this ensemble, by combining impactful architecture with a privileged view of a natural Amazonian phenomenon.
Monumental architecture targets Amazonian landscape
The presence of a work signed by Oscar Niemeyer in Amazonas has symbolic weight because it connects modern Brazilian architecture to one of the country’s most recognized landscapes. The park aims to transform the location into a point for visitation, contemplation, and urban coexistence.
At the same time, the construction requires structural solutions compatible with its scale. The big slab is not just a technical step: it supports the continuity of the architectural form that will give identity to the oca, one of the most striking elements of the new park in Manaus.
Stage puts the park in a decisive phase
With the concreting of 380 m³ of concrete, Niemeyer’s work advances to a more visible phase of the structure. This stage completes an important part of the oca’s base and paves the way for the execution of the dome and the rods that should compose the final design of the space.
The movement of up to 60 concrete mixer trucks shows the scale of the intervention in the Meeting of the Waters Park. Do you believe that monumental works like this help to enhance public spaces and natural landscapes, or does the impact depend more on management and use after the inauguration? Share your opinion.
