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Germany

Hesse

Darmstadt District

Main-Kinzig-Kreis

Biebergemünd

Bertha-Stollen Iron Ore Mine

Discover

Places to see

Germany

Hesse

Darmstadt District

Main-Kinzig-Kreis

Biebergemünd

Bertha-Stollen Iron Ore Mine

Recommended by 19 hikers out of 21

This Highlight is in a protected area

Please check local regulations for: Naturpark Hessischer Spessart

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Location: Biebergemünd, Main-Kinzig-Kreis, Darmstadt District, Hesse, Germany

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Best Hikes to Bertha-Stollen Iron Ore Mine

4.8

(32)

156

hikers

1. View of Bieber – Wiesbüttsee loop from Bieber

11.6km

03:19

280m

Intermediate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

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Intermediate

4.8

(11)

hikers

2. Dr. Karl Kihn Square – Burgberg Chapel loop from Wiesen

18.2km

05:09

400m

Expert hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels.

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Expert

4.7

(32)

hikers

3. Burgberg Chapel – View of Gassen and Röhrig loop from Bieber

6.19km

01:48

170m

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

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Easy

Tips

Manfred 🔎

April 6, 2022

The Bertha tunnel ("Berha von Krupp" was opened in 1908 by Friedrich Krupp AG. It was used to mine iron ore, which was dumped in Bieber and then transported to Gelnhausen via an industrial narrow-gauge railway with 77 conveyor wagons. From there, The ore was taken to the Ruhr area for smelting.Due to the high arsenic content, the iron ore was of inferior quality, so mining was stopped on May 31, 1925. By this time, the Bertha tunnel had reached a length of 3,050 m. Good luck on the capable miners from the Spessart! 👍👍👍

Translated by Google •

Ralf

July 10, 2022

very impressive. Does anyone know if the tunnel can be visited?

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MS 🚴‍♂️

August 26, 2024

After the Essen-based Friedrich Krupp Aktiengesellschaft had bought all the shares of the "Gewerkschaft Bieberer Gruben*, it took over the management of this union on September 1, 1907. A year later, the new tunnel was built at the former iron smelter, which from 1910 was called the Bertha tunnel, in reference to Bertha von Bohlen and Halbach. In the following years, the Bertha tunnel, which was to be used to drive under the entire mining area from Burgberg to the Gordon field (mining area behind the upper Lochborn), was further excavated.

In 1922, the Bertha tunnel had reached its maximum length of 3,115 m. The original target, the Gordon field, is still 1,350 m away from here. All extraction points up to the middle Lochborn are connected to the Bertha tunnel. The connection of the extraction points in the upper Lochborn (shaft L and upper machine shaft) could no longer be realized.

After World War I, the sale of iron ore fell sharply. Attempts were therefore made to mine cobalt ore in addition to iron ore. In 1922, a crosscut was made from the Bertha tunnel to the cobalt veins. Two years later, the first vein crack was reached. Even after operations ceased in April 1925, the exploration work in the cobalt vein continued. However, as the maintenance costs of the Bertha tunnel were so high and the exploration work in the cobalt vein was so unlikely, work was finally stopped on January 12, 1926. Up to this point, 2,958 kg of cobalt ore had been mined.

Source: Information board at the site

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Elevation 230 m

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Saturday 20 September

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Max wind speed: 9.0 km/h

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Location: Biebergemünd, Main-Kinzig-Kreis, Darmstadt District, Hesse, Germany

Bertha-Stollen Iron Ore Mine

1. View of Bieber – Wiesbüttsee loop from Bieber

2. Dr. Karl Kihn Square – Burgberg Chapel loop from Wiesen

3. Burgberg Chapel – View of Gassen and Röhrig loop from Bieber

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