Restoration project for the Järvenperä area of Lake Pitkäjärvi

The project’s permit application under the Water Act was submitted to the Finnish Supervisory Agency in July 2026. The processing of the application may take about a year. Planning will continue at a more detailed construction planning level alongside the permit process.

In 2025, a preliminary investigation was carried out in the area. It included water depth measurements, ecological surveys and sediment investigations. The investigations helped determine the areas where restoration measures could be carried out. The preliminary investigation concluded that it is possible to plan dredging and vegetation removal in the innermost part of the lake.

In 2026, the project moved on to the general planning phase, during which the preliminary plan was specified.  During planning, the specific dredging and vegetation removal areas and the arrangements for the handling and dumping of the dredging waste were defined. The aim is to make use of the dredging waste on site where possible and reduce the need for transport and the related environmental impact.

The City of Espoo organised a residents’ event to present the planning of the Pitkäjärvi restoration project.
Date and time: Tuesday 9 June 2026, 15:30–17:30
Place: Järvenperän koulu, art room (address: Auroranmäki 1(external link, opens in a new window))

You can find the presentation material from the residents’ event and the general plans below.

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You will receive up-to-date information about the progress of the Pitkäjärvi restoration project by email. In the newsletter, you will find information about the planning phases and upcoming residents’ events. The project aims to improve the flow of water in the area, curb eutrophication and strengthen biodiversity. The newsletter is sent 1–3 times a year as needed.

👉 Subscribe to the newsletter through the link or by scanning the QR code: https://link.webropol.com/ep/pitkajarvi(external link, opens in a new window)