The Story of How Medellin Turned Its Water Reservoirs into Public Parks

The Story of How Medellin Turned Its Water Reservoirs into Public Parks

While developing a master plan for Medellin's urban lighting system, EPM, Medellin's public utility company, analyzed the Colombian city's infrastructure and nocturnal lighting system by superimposing a map of the system over a map of the city. What they found was an urban landscape blotted by "islands" of darkness.

Much to the surprise of the utilities company, the dark spots were actually 144 water tanks that were initially built on the city's outskirts; however, thanks to the progressive expansion of Medellin's city limits, the tanks now found themselves completely surrounded by the informal settlements of the Aburra Valley. Even worse, they had become focal points for violence and insecurity in neighborhoods devoid of public spaces and basic infrastructure. 

The Story of How Medellin Turned Its Water Reservoirs into Public Parks - More Images+ 18

Mapeo de iluminación nocturna en Medellín. Image Cortesía de EPM

Through their Sustainable Urban Interventions Department (DIUS), EPM analyzed the 144 water tanks "based on aspects like usable land, population density, the neighboring community's needs, geological restrictions, the expansion of the aqueduct, and the surrounding area." They later chose 32 tanks and, from there, narrowed their list down to the 14 tanks most in need of intervention, giving birth the to ambitious project of creating quality public spaces in Medellin's poorest neighborhoods, dubbed the UVA or Articulated Life Units.

In a project that was featured in the 2016 Venice Biennale of Architecture, EPM applied participatory design strategies that would emphasize their role, not only as a utility company, but citizens of Medellin. In a beautiful ad hoc metaphor for the times, the walls around the water tanks were torn down to allow access to the community surrounding them. Now, each tanks forms a part of a network that validates Medellin's interest in re-purposing the places that were once centers for violence and conflict.

Tanques de agua intervenidos. Image Cortesía de EPM

Official Description: Each water tank was seen as a tool in forging a new relationship of trust with the communities surrounding them: working hand in hand with the residents in designing the project, the common goal was to transform something that was once closed and secret into something open and interactive. The resulting project was a mix of the existing water infrastructure--a valuable community resource-- with a public space. 

The water tanks were opened, the walls around them dismantled, and the surrounding area was redesigned to create a totally re-imagined public space, creating new connections with the community that was once kept out. The project ultimately created a space for equality to replace the division and exclusion that once marked the area.  As a response to the lack of public spaces in these neighborhoods, the walls around the water tanks were torn down and became centers for recreation and culture. In an act of generosity and trust, hydraulic infrastructure became public infrastructure that served to revamp the surrounding communities.  

By creating public spaces, transformations can happen on multiple scales. This project in particular aims to give new life and use to already existing infrastructures and to open them to the community. In the neighborhoods, each one of the buildings seeks to establish new urban connections, enriching the local dynamic and creating new focal points within the city.

For EPM, the goal of transforming the water tanks was to provide a place for people to congregate and hold events. To accomplish this, the project's design aimed to create as much public space as possible for residents to utilize and enjoy.

Tipologías de UVA Tanques. Image Cortesía de EPM

To accomplish this, EPM established design strategies to identify the particular aspects of each tank and how they fit into their surroundings. Whether the tanks were in closed surfaces, exposed surfaces, or partially underground, EPM took into account both the conditions of the tanks and the land surrounding them when laying out the remodeling plan. In essence, the topography and the landscape generated the form of the public spaces and the architecture while the structure became a building and the public space surrounding it, an urban balcony.

Another facet of the remodel of the reservoirs was creating trails and other mobility systems that spanned the land surrounding the tanks, connecting once-isolated neighborhoods and allowing residents access to other parts of the city. Additionally, the tank and its infrastructure became the "building." In other words, the water tank is the centerpiece of the project, bringing together all the other changes as a way to highlight its unique position in the urban landscape. 

Finally, water and light are the fundamental elements behind the project and served as the starting point for the master lighting plan laid out by the city. These elements are fundamental in making a public space usable and highlight the already essential function of the water tanks, which will continue serving the community as both an aqueduct and a gathering place.  

Here are some of the projects to date:

UVA La Esperanza

UVA La Esperanza. Image Cortesía de EPM

Original Infrastructure: Moscú Tank
San Pablo, Popular
Address: Calle 96 #34-100
Design and Construction: January 2013 - March 2014

UVA La Imaginación

UVA La Imaginación. Image Cortesía de EPM

Original Infrastructure: Orfelinato Tank
Neighborhood/Commune: San Miguel, Villa Hermosa
Address: Carrera 40 #61-04
Design and Construction: March 2014 - November 2015

UVA La Alegría

UVA La Alegría. Image Cortesía de EPM

Original Infrastructure: Campo Valdés Tank
Neighborhood/Commune: Santa Inés, Manrique
Address: Carrera 41 #79-66
Design and Construction: March 2013 - February 2015

UVA La Armonía

UVA La Armonía. Image Cortesía de EPM

Original Infrastructure: La Tablaza Tank
Neighborhood/Commune: Santa Inés, Manrique
Address: Carrera 36 #84-98
Design and Construction: July 2013 - November 2015

UVA Los Sueños

UVA Los Sueños. Image Cortesía de EPM

Original Infrastructure: Versalles Tank
Neighborhood/Commune: La Libertad, Villa Hermosa
Address: Calle 57 #17B-50
Design and Construction: 
May 2014 - February 2015

UVA La Libertad

UVA La Libertad. Image Cortesía de EPM

Original Infrastructure: Santa Elena Tank
Neighborhood/Commune: La Libertad, Villa Hermosa
Address: Calle 57 #17B-50
Design and Construction: May 2014 - February 2015

UVA Nuevo Amanecer

UVA Nuevo Amanecer. Image Cortesía de EPM

Original Infrastructure: Santo Domingo Tank
Neighborhood/Commune: La Avanzada, Popular
Address: Calle 107B #23A-138
Design and Construction: July 2013 - October 2015

UVA San Fernando

UVA San Fernando. Image Cortesía de EPM

Original Infrastructure: San Fernando Water Treatment Plant
Neighborhood/Commune: San Fernando, Comuna 4, Itagüí
Completed: 2016

Other UVAs built include Los Guayacanes, Mirador San Cristóbal, La Cordialidad, El Encanto, and Aguas Claras

Image gallery

See allShow less
About this author
Cite: Valencia, Nicolás. "The Story of How Medellin Turned Its Water Reservoirs into Public Parks" [La historia de cómo Medellín convirtió sus tanques de agua en verdaderos parques públicos] 16 Jun 2020. ArchDaily. (Trans. Johnson, Maggie) Accessed . <> ISSN 0719-8884

UVA Los Sueños. Image Cortesía de EPM


You've started following your first account!

Did you know?

You'll now receive updates based on what you follow! Personalize your stream and start following your favorite authors, offices and users.