Materials offered by nature – rock and gravel
Extracting stone materials causes changes in the original state of nature and biodiversity. On the other hand, quarries and gravel pits offer an excellent opportunity to fulfill national and European nature conservation objectives. So far the focus at extraction sites has been on biodiversity when rehabilitating, but now we have a way to enhance and develop biodiversity also during our operations.
The biodiversity potential in our sites is often high. To become a NCC Kielo site there are a number of criteria’s that have to be met including an investigation of habitat types to note characteristic species in the area, set targets and describe planned measures in order to create desirable conditions for biodiversity at the site.
The method NCC Kielo was first launched in Finland 2012, and is now introduced as our Nordic method within NCC Industry.
Examples from Finland
Kiuru area (Skylark) in Ohkola quarry, Mäntsälä
Kiuru area is located at the Ohkola quarry in southern Finland. The biodiversity area is about 4 hectares. Ohkola receives clean top soils and the received soil has been used for landscaping. Vegetation has grown well in the area with the contribution of the seedbank in the received soil. A southbound slope was planted with seeds of meadow flowers in the autumn of 2015. A butterfly survey has been conducted in the area twice so far. Summer of 2014 was excellent for butterflies and as a result 393 species were identified. The results for 2015 have not been received yet, but the summer has not been favourable for invertebrates.
Lahokko area (Dead wood) in Vanhakylä quarry, Loviisa
The Vanhakylä quarry was opened in 2014 so it’s a very new area. The area reserved for the KIELO project is located in the noise barrier of the site. In June 2015 a dead wood zone was built on the south side slope of the noise barrier. The area is favourable especially for saprotrophs such as various hymenopterans. More wood will be brought to the area gradually to ensure that there is wood in different stages of decay.
Cinna area in Myllypuro quarry, Nokia
Cinna-area in Myllypuro aims to restore the drooping wood reed (Cinna latifolia). The reed is protected by the EU directive. The plant has been known to grow on the area and restoration work was conducted in the summer of 2014. Restoration included activating the seedbank in the area and ensuring the habitat is more suitable again for the plant. Competetive grass species were removed from the area.
Tulikattila area (Fireboiler) in Kuismala quarry, Tampere
The aim of the Tulikattila area is ecosystem restoration through fire. The main focus on the area will be on meadow type habitats with fire as the method of restoration. The method has been used in cultivation before industrial agriculture but it is very rarely used in these types of projects. Small alleyways will be built in the area for example by using recycled concrete. Novel ecosystems are also a big part of this area, where new types of ecosystems will be created with recycled material.