Preobrazhenka, also known as Preobrazhenskoye (Russian: ÃÂÃÂõþñÃÂðöõýúð) is a village in Katangsky District, Irkutsk Oblast, Russia, that lies along the Nizhnyaya Tunguska river. The village has seventeen streets, its own airfield, and is connected to the outside world by helicopter flights, twice a month in the winter and thrice a month in the summer, to nearby towns/villages Kirensk, Nepa, Erema, and Yerbogachen in a circular flight route.
As of 2025, the population is estimated to be around 348 (numerical average of two conflicting sources):
The Preobrazhenka layer that the village sits on top of represents a significant geological formation within the Danilovo horizon of the Vendian system in the southeastern Siberian Platform. Dating to the Late Vendian period (approximately 540-535 million years ago), it consists primarily of dolomitic rocks that overlie the Tira horizon, often following a substantial pre-Danilovo break in sedimentation that lasted 10-20 million years. The Preobrazhenka layer (sometimes referred to as "layer 2" in stratigraphic studies) is particularly notable as an oil and gas-bearing stratum in the pre-Lena-Nepa and Erbogachen zones of the Nepa-Botuoba oil and gas region. Within the regional stratigraphic sequence, it appears after the Il'bokich layer and represents the beginning of the Danilovo horizon in sections where earlier layers are absent, particularly in the southern part of the Nepa-Botuoba and most sections of the Angara-Lena oil and gas regions.
Preobrazhenka has a severe continental climate with extremely cold winters and mild summers. Based on temperature data from 1951 to 2024, the village experiences a wide annual temperature range of approximately 50 ðC. January and February are the coldest months with average temperatures typically between -25 ðC and -30 ðC, while occasional cold spells can bring temperatures below -35 ðC. July is the warmest month with average temperatures ranging from 15 ðC to 19 ðC. The village sees a short warm season from June to August when average temperatures remain above 10 ðC, while the long winter period (November through March) maintains temperatures well below freezing. Spring and autumn are brief transitional seasons, with April marking the transition to positive temperatures and October returning to below-freezing conditions. The annual mean temperature for Preobrazhenka is approximately -5 ðC, indicating its location in a cold climate zone typical of continental Siberia.
In a genetic report, ancient DNA discovered in Preobrazhenka hint that the area has been populated since at least 991BC, but the first official documentation of the village dates back to the 17th century when it was founded by settlers as a small settlement, before gradually developing and growing. In the 19th century, Preobrazhenka became an important center for trade and exchange of goods between local residents and merchants from other regions of Russia. Fairs and bazaars were held there selling food, household items, and other goods.
In 1880, a census was carried out confirming Preobrazhenka had 17 households, consisting of 57 males and 53 females. The most common surnames of the settlers were "Zyrianov" and "Iuriev" at the time.
Preobrazhenka was the seat of now-defunct Preobrazhensky District from 1926 to 1929, but in 1930, Preobrazhensky District was incorporated into newly formed Evenki National Raion of Katanga. During World War II, a significant number of male residents living in Preobrazhenka were conscripted to fight Nazi Germany forces. After World War II, development continued in the village, including construction of hospitals, schools, houses and other infrastructure (e.g. a post office). In the 1960s, industrial development began, which led to an increase in population size for the village and a reported increase in quality of life. As of 2024, Preobrazhenka residents still report low pollution levels and occasional tourists.
In 2013, an Angara Airlines Mil Mi-8 helicopter carrying nine emergency rescue crew working for the regional government, as well as two tonnes of explosives, took off from the village and crashed six kilometers from Preobrazhenka - originally bound for a location along the Nizhnyaya Tunguska river to break up ice blocking it, before it stopped responding. At the time, the Preobrazhenka village had been in a state of emergency as water level rose almost nine metres (30 feet) after the ice blocked the water flow and 125 homes were flooded. The wreckage was discovered around hours after the aircraft disappeared from the radar. All nine people on board died.
In 2015, a radiocarbon dating study was carried out by Irkutsk State University in a cemetery in Preobrazhenka analyzing the marine reservoir effect that originated from the cemetery's presence alongside the Nizhnyaya Tunguska river.
The village is subject to very frequent flooding:
The Woodrow Wilson International Center for Scholars labelled Preobrazhenka a 'historic site' for monuments present there (elaborated on in the next section).
Tourist attractions in Preobrazhenka include:
A preschool (kindergarten) established in 2001, headed by Abliksanova Irina Valerievna since 2020, and a secondary school established in 2000, headed by Lishchinskaya Elena Olegovna since 2008, are present as of 2025, both of which are debt-funded, managed and regularly inspected by the Irkutsk regional government.
The preschool has undergone two arbitration cases and fifteen lawsuits (mostly labor disputes) since its establishment, having to pay out a total of 41,000 rubles ($500) in settlements to plaintiffs.
The secondary school has been undergone six arbitration cases and five lawsuits since its establishment, having to pay out a total of 2.3 million rubles ($28,000) in settlements to plaintiffs.