10 Euro Hydroelectric Power


Issuer Slovakia
Period Republic (1993-date)
Type Non-circulating coin
Year 2021
Value 10 Euro
10 EUR = USD 10
Currency Euro (2009-date)
Composition Silver (.900)
Weight 18 g
Diameter 34 mm
Shape Round
Technique Milled
Orientation Medal alignment ↑↑
Number N# 285843
Numista type number (https://en.numista.com/help/what-is-the-n-number-visible-in-the-catalogue-33.html)
References KM# 183
Tracy L. Schmidt (editor); 2019. Standard Catalog of World Coins / 2001-Date (14th edition). Krause Publications, Stevens Point, Wisconsin, USA.
And 5 more volumes.

Commemorative issue

Hydroelectric power plant in Kremnica.


The obverse depicts the wheel of the hoist that services the shaft above the underground hydroelectric plant in Kremnica. To the upper right of this image is the Slovak coat-of-arms, splitting the year of issuance ‘2021’. The name of the issuing country ‘SLOVENSKO’ is inscribed along the upper-left edge. At the bottom of the design are a stylised letter ‘N’, referring to the coin’s designer Štefan Novotný, and the mint mark of the Kremnica Mint (Mincovňa Kremnica), consisting of the letters ‘MK’ placed between two dies.

Script: Latin

20 21

Translation: Slovakia

Engraver: Dalibor Schmidt

Designer: Štefan Novotný


The reverse image depicts, in the lower right quadrant, the Kremnica underground hydroelectric power plant and, on the left side, the mine’s surface buildings connected with the Turčekovský water pipeline and with subterranean mine workings. The lower left quadrant includes an upper aperture on to a rail switch inside the mine and a lower aperture showing water flowing out of the adit. The words ‘PODZEMNÁ VODNÁ ELEKTRÁREŇ KREMNICA’ (Kremnica underground hydroelectric plant) are inscribed along the edge of the design. The coin’s denomination and currency ‘10 EURO’ appears in the space above the image. In the top part of the image are the years ‘1921’ and ‘2021’, separated by the mining symbol of a hammer and pick.

Script: Latin

1921 2021

Engraver: Dalibor Schmidt

Designer: Štefan Novotný


Kremnica / Körmöcbánya / Kremnitz, Slovakia (1328-date)


Around the town of Kremnica, miners have for centuries been drawing out natural treasures from the earth. The need to find a symbiosis between mining activity and water, which for miners is a good servant but bad master, gave rise to electricity generation, something we take for granted today. Located in spaces at the level of Kremnica’s Main Hereditary Adit, 245 metres below ground, an underground hydroelectric plant has since 1921 been transforming strong flowing water into electrical energy. It is a major feat of technical prowess. The length of the adit between shaft IV at Kremnica and its outlet at the Hron River is 11 km. The elevation over that distance is only 5.5 metres, and in places the water seems to flow into the hill. Shaft IV is today the only operational shaft at this location. The shaft, engine room, and hoist still operate in their original condition. With water flowing in at a rate of 1 200 litres per second, the plant has a generating capacity of 2.16 MW. With such plants being rare in Europe, the underground hydroelectric plant in Kremnica has been designated a Slovak national cultural heritage site. Its operator, the mining company Kremnická banská spoločnosť, s.r.o., aims to maintain the plant’s uniqueness and beauty, just as we have inherited it.

See also

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Date Mintage VG F VF XF AU UNC Frequency
2021  2 600 65% BU
2021  6 200 65% Proof

Frequencies show the percentage of Numista users who own each year or variety among all the users who own this coin. Since some users own several versions, the sum may be greater than 100%.

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Feedback: 5/55/55/55/55/5 (×340)
Country: Slovakia
Languages: English Czech Slovak
Numista Rarity index: 83 Search tips
This index is based on the data of Numista members collections. It ranges from 0 to 100, 0 meaning a very common coin or banknote and 100 meaning a rare coin or banknote among Numista members.

Bullion value: USD 10.58 Search tips
This value is given for information purpose only. It is based on a price of silver at 653 USD/kg. Numista does not buy or sell coins or metal.

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