Skarta is building pumping stations of Tampere region’s new central wastewater treatment plant
Site: Tampere region’s new central wastewater treatment plant
Customer: Tampere Region Central Wastewater Treatment Plant Ltd
Project Content: Construction of wastewater pumping stations with their incorporated maintenance, monitoring and social spaces
Project began: June 2022
Estimated end of project: by the end of 2024
Project stage: earthworks
Site manager: Jari Häkkinen / Skarta Finland Oy
Customer’s site manager: Marko Männynsalo / Tampere Region Central Wastewater Treatment Plant Ltd
Skarta started in June 2022 building of two pumping stations that serve the entirety of the Tampere region and many of its neighbouring municipalities. The contract’s value is approximately EUR 11 million. The stations are expected to be operational by the end of 2024.
A new wastewater treatment plant that uses the latest treatment technologies is being constructed in Tampere as a joint project between several municipalities. The participating municipalities in Tampere Region Central Wastewater Treatment Plant Ltd are Tampere, Kangasala, Lempäälä, Pirkkala, Vesilahti and Ylöjärvi. The project is the largest single environmental investment in the Pirkanmaa region, with a total budget of about EUR 350 million.
The construction of the Central Wastewater Treatment Plant inside the rock in Sulkavuori started in 2018. The heart of the project, the pumping stations, was put out to tender last November.
Skarta’s contract includes the construction of both wastewater pumping stations. The pumping station in Rahola is 600 square metres while the largest of the two, with a floor area of 1,000 square metres, is near the centre of Tampere in Viinikanlahti. When the construction of the pumping station in Viinikanlahti is completed, it will be one of the largest wastewater pumping stations in Finland.
The Viinikanlahti wastewater pumping station is a demanding construction project. Its proximity to Lake Pyhäjärvi makes it a very challenging project from a geotechnical point of view. The lowest parts of the large pumping station are well below the surface level of the lake, and they are being built under a constant water pressure. Skarta’s professionals will begin the construction by first excavating an over 10-metre deep cylindrical shaft with a 20-metre diametre that is supported by drilled piles. From there, Skarta will begin constructing the actual pumping station upwards.
The existing wastewater treatment plants provide an additional challenge for both the Viinikanlahti and Rahola pumping station construction projects. Due to their proximity, the work on the construction sites has to be co-ordinated with the existing treatment plants so they can keep functioning as usual.
Both the Rahola and Viinikanlahti construction projects include the construction of the actual pumping stations as well as the incorporated maintenance, monitoring and social spaces. Skarta is the general contractor and the subcontracts for the pumping stations, including machinery, HVAC and electricity, will be put out to tender by Tampere Region Central Wastewater Treatment Plant Ltd separately later on.
“The first stage of the construction involves the building of the support elements for the earthworks and the shafts and then with the in-situ concrete structure work for the pumping station buildings and the building of prefabricated structures,” explains Skarta Finland Ltd’s Site Manager, Jari Häkkinen.