The peatland is located in the northwestern part of Ida-Viru county, 2 km west of the city of Kiviõli, in a flat slope depression. The south-eastern part is crossed by the Tallinn-St. Petersburg railway and road. The bog peat formed by terrestrialisation of a shallow lake (there is a 0.5 m thick layer of lake mud under peat) (Orru et al., 1975). The peatlands feeds on groundwater and flood water, the water recipient is the Purtse River. There is a pine-birch woodland, and a wooded-grass bog in the river area in the peatland. The area of ​​the peatland is 2108 ha, of which 415 ha is peat deposit. The peat reserve of 1.07 million tons belongs to the potentially economic reserves of well-decomposed peat (Orru et al., 1992). Peat layers consisting of moderately decomposed (32%) reed or sedge peat, are spreading in the peatland. In peripheral areas, there is well-decomposed (30%) wood and wood-sedge peat. The thickness of the deposit is 1.2 ... 2.3 m, ash is content  is10.2%,  moisture content is 88% (Orru et al., 1975). The edges of the bog are drained. The drainage network has been deepened in places by blasting bedrock. In the southern part, the groundwater level has decreased somewhat due to the  oil shale mines. It is recommended to keep the  Satsu  in its current state.