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Project
History
Architecture
Idea

Project

The building as a machine. Water rises by overflow into the elevated tank and from there falls onto the turbines.
Source: Archive of A. Vazakas – M. Mandalakis

The Small Hydroelectric Power Plant (SHPP), together with the artificial lake of Agia in Chania, is a remarkable 20th-century engineering project. At the time of its construction, it was a pioneering achievement in Greece, demonstrating how water resources could be harnessed to produce clean, renewable energy.

The plant operates using a 4-meter elevation difference between the lake and the power station. Water from the lake first passes through a 435-meter earthen dam, then enters a closed concrete penstock that stretches 490 meters and measures 2.5 meters in diameter.

From the penstock, water is divided: part is released into a tailrace channel through a metal sluice gate, returning to the local stream, while the rest is pumped to a rooftop surge tank, standing 9.2 meters high. When the surge tank overflows, water is directed downward with force into a specialized chamber inside the plant.

During its descent, the water drives three pairs of open Francis-type turbines mounted on horizontal shafts. The turbines transfer their rotational energy to electromagnetic generators, producing alternating current (AC) electricity.

This SHPP is a brilliant example of early renewable energy engineering, integrating lake, dam, penstock, surge tank, turbines, and generators into a single, efficient system that continues to inspire modern hydroelectric design.

 

Source: Historical Archive of the Public Power Corporation

History

The Small Hydroelectric Power Plant (SHPP) of Agia was inaugurated on July 22, 1929, by the Greek Prime Minister Eleftherios Venizelos. At the time, it provided the city of Chania with a modest but important supply of electricity - delivered at low cost, on demand, and in an environmentally friendly manner, without additional pollution.

As one of the few hydroelectric plants in Greece during its era, the SHPP remained in operation until 2008. Originally owned by the Municipal Lighting Company of Chania, it was purchased in 1959 by the Public Power Corporation (PPC) and later managed by PPC Renewables S.A., reflecting its ongoing contribution to the region’s energy infrastructure.

To meet the growing electricity demands of Chania and neighboring communities—including Agia, Agrokipio, Alikianos, Varýpetro, Galatas, Kokkinos Pyrgos, Mournies, Pelekapina, Perivolia, Skoulas, Souda, and Chrysopigi—the Municipality of Chania established a thermal power station near the city center on Ypsilanton Street in 1936.

Before the creation of the PPC, electricity supply in Crete was fragmented. A total of 63 cities and villages were served by 43 separate companies. Most of these were linked to local olive oil or agricultural cooperatives (22), followed by community or municipal electric companies (11), and private enterprises (10). The SHPP of Agia stands out as a pioneering and unifying element in this evolving energy landscape.

 

Source: Historical Archive of the Public Power Corporation

Industrial Architecture and
Industrial Archaeology

The Small Hydroelectric Power Plant (SHPP) Agia is more than an energy facility—it is a vital landmark of local industrial heritage. As a pioneering project of early 20th-century Crete, it is deeply embedded in Chania's modern history and remains a significant part of the local community's collective memory. Today, the plant holds historical, technological, social, architectural, and scientific value.

The SHPP was designed by Italian engineer Prinzivalli and Swiss engineer Sen, in collaboration with a team of engineers from Heraklion - their vision combined functionality with a modern approach to industrial architecture.

The plant exemplifies modern industrial design:

  • Minimalist aesthetic with no decorative elements.

  • Exposed load-bearing structures emphasizing structural clarity.

  • Clear separation of functional areas, including the generator hall, the power distribution tower, and the water tank/drop shaft.

Technological Innovation

The plant’s electromechanical equipment, manufactured by the German company AEG, represented state-of-the-art technology at the time. The combination of advanced engineering, functional architecture, and pioneering machinery makes the SHPP a remarkable example of Crete’s industrial and scientific heritage.

 

Source: Archive of A. Vazakas – M. Mandalakis

Idea

As the electricity demand grows, the Public Power Corporation (PPC) has expanded its energy infrastructure while repurposing decommissioned power stations to benefit local communities. In this spirit, the former Small Hydroelectric Power Plant of Agia has been transformed into an Exhibition Hall for Renewable Energy Sources.

Goals of the Exhibition Hall:

a. Awareness and Education
The hall aims to inform visitors about:

  • Industrial heritage and local history, highlighting the preservation of cultural landmarks.
  • Electricity generation from renewable energy sources.
  • Scientific, technological, and environmental topics.
  • Biodiversity and habitat management, emphasizing the value of local ecosystems.

b. Recreation and Nature
The power plant and the Agia wetland are also popular destinations for walkers and nature enthusiasts.

  • Its proximity to Chania makes it easily accessible to both residents and international visitors.
  • The area attracts those interested in flora, fauna, and scenic landscapes, offering a blend of education and relaxation.

 

 

Contributors

Project management:

Region of Crete
(Head of Project and funder)
Regional Development Company of Crete S.A.
(Project execution)
Technical Chamber of Greece / Western Crete Section
(Coordinator of Educational activities)

Project administration:

Regional Development Company of Crete S.A.
Εfstratios Flemetakis, President, Regional Councilor of Crete
Maria Petrantonaki, Director, Physicist

Technical Scientific Group:

Alexandros Vazakas, Architect, Assoc. Prof. School of Architecture, Technical University of Crete
Theocharis Tsoutsos, Chemical Engineer, Prof. Chemical & Environmental Engineering School, Technical University of Crete
Nikos Anastasakis, Physics Prof., Head of E.K.F.E. (Laboratory Center of Physics Science), Chania
Maria Petrantonaki, Physicist, Rep. of Regional Development Company of Crete S.A.
Matthaios Frantzeskakis, President of the Cultural Society of Crete
Panagiotis Bourbourakis, Director of Small Hydroelectric Power Plants P.P.C. Renewables S.A.

Research - Design:

Maria Mavroidi, Historian - Industrial Archaeologist, Head of P.P.C. Historical Archives
Alexandros Vazakas, Architect, Assoc. Prof. School of Architecture, Technical University of Crete
Myrto Kontomitaki, Museologist - Art Historian
Nikos Anastasakis, Physics Prof., Head of E.K.F.E. (Laboratory Center of Physics Science), Chania
Michalis Dretakis, Ornithologist, Researcher, Natural History Museum of Crete

Graphic Design: Inglelandi Digital Agency

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