Mocó Reservoir, Renaissance water reservoir in Adrianopolis, Manaus, Brazil

Mocó Reservoir is a reservoir on Rua Belém, on the border of Nossa Senhora das Graças and Adrianópolis in Manaus, inaugurated in 1899. Its cast-iron interior is enclosed by a masonry shell with seven ground-level arches and seven window-like aedicules on the second level, repeated on every face.

Built during Manaus' rubber boom, the reservoir replaced an older water supply that could no longer serve the growing city. Its foundations were laid by engineers Frank Hirst Hebblethwaite and Henrique Eduardo Weaver, and it opened on 23 September 1899 under governor José Cardoso Ramalho Júnior. IPHAN listed it as national heritage on 24 April 1985, and the state government restored it in 1998.

The reservoir takes its name from the igarapé do Mocó, the small stream beside which it was built in the old Vila Municipal district, today the boundary between Nossa Senhora das Graças and Adrianópolis. The building is still operated by the local water company and supplies several Manaus neighbourhoods, so it is seen as working infrastructure rather than a museum piece.

The site sits in a central part of Adrianópolis and is easily visible and accessible from nearby streets. Since the structure remains in active use for water supply, interior access may not always be available, so check ahead.

The reservoir was built to compensate for the shortcomings of the Cachoeira Grande hydroelectric plant's dam, and its pipes were linked to that plant's reservoir. Engineers Frank Hirst Hebblethwaite and Henrique Eduardo Weaver laid its foundations, with 4,750 pounds paid by the state for the pipe connection.