Tank dam

Tank dam
Location:	Bergisches Land
Tributaries:	Panzerbach
Larger places on the shore:	Lennep
Major cities nearby:	Remscheid
	North Rhine-Westphalia , Germany
Coordinates	51 ° 10 ′ 51 " N , 7 ° 16 ′ 27" E Coordinates: 51 ° 10 ′ 51 " N , 7 ° 16 ′ 27" E
	Data on the structure
Construction time:	1891-1893 / 1901-1905
Height above valley floor:	12.5 m
Height above foundation level :	14.75 m
Height above the river bed :	14.00 m
Building volume:	3000 m³
Crown length:	164 m
Crown width:	3.6 m
	Data on the reservoir
Altitude (at congestion destination )	292.73 m
Water surface	3 ha
Storage space	0.278 million m³
Catchment area	1.62 km²
	Renovation of the dam in March 2014

The armored dam is located in North Rhine-Westphalia in Bergisch Land in Remscheid - Lennep and served until 1990 as a drinking water - dam .

The construction

It was built between 1891 and 1893 by the engineer Albert Schmidt to obtain drinking water and, as the main flowing water, damms the Panzerbach. The tank dam is the second oldest drinking water dam in Germany after the Eschbach dam, which is only a few kilometers away .

The gravity dam, built from rubble stones , originally had a height of 12.5 m with a crown length of 100 m and a crown width of 1.6 m. The capacity was 117,000 m³.

Lennep tank dam

1901 was approved to increase the dam from the formerly independent city Lennep, and the new, now 14.75 m high, 164 m long and a crown width of 3.6 m propertied was on November 1, 1905 the dam will be put into operation.

Unlike other dams, it has been given pilaster-like retaining walls for reinforcement when it is raised on the air side . Thus, this construction method represents a special form of the Intze principle . The dam now had a capacity of around 0.3 million m³ and was therefore still a very small dam.

Naming

In the early days of dam construction, from the end of the 19th century to the beginning of the 20th century, it was customary in Germany not to name dams after their dammed up water, but after the city they were built to supply. As a result, the tank dam is also known as the Lenneper dam in contemporary literature after the then independent town of Lennep .

Todays use

Today the dam is no longer used to produce drinking water, but is a destination in the Lennep city forest. It no longer has any water management benefit. The waterworks was decommissioned in 1990. The dam is a listed building and the tributaries are protected.

Since the wall was in need of renovation, most of the water was drained and there was a risk of drainage or demolition for years due to the high renovation costs. After a long period of uncertainty, a financing plan was drawn up in December 2006 and the renovation was decided.

The Wupperverband took over the dam on January 1, 2007 with the intention of rehabilitating it. The renovation work began in August 2013 and was completed in March 2016.

In the vicinity of the dam there are a number of plants that are under nature protection and are rarely found anywhere else in the Bergisches Land.