Neustadt Dam

The dam Neustadt (also called New Town or Nordhäuser Dam ) in the resin is a 1904-1905 built, consisting of dam, reservoir and hydropower plant dam near Neustadt in the district of Nordhausen in Thuringia.

The dam supplies drinking water from Nordhausen and Neustadt; the water is supplied to the water board Nordhausen. It has the oldest dam in Thuringia. The jammed waters is the Krebsbach. The dam is owned by the Free State of Thuringia, Thuringian operators is the distance water supply.

Bathing and recreational sports in the lake are just like entering the dam prohibited, but you can walk around the reservoir.

Geographical location

The dam Neustadt is located in the southern Harz in the Southern Harz Nature Park. It is located about 3 km (air line) north-east of Neustadt on the upper reaches of the Thyra influx Krebsbach, among others between the beggar ( 568.8 m) in the northeast, Mittelberg ( 533 m) in the southeast and Heidelberg ( 527.5 m ) in the west.

Dam

The curved gravity dam that impounds by their own weight the Krebsbach is about 134 m ( other claims to 134.6 m) long and 4.25 m her crown and at the base about 19 meters wide. About the valley floor is 32 m and above the foundation level 33.76 m high. The mural crown is at 448.62 m above sea level. NN. The wall that is made of quarry stones and their air side has a surface of natural stone, has a raid with 11 openings per 5 m wide. The raw water discharge averages about 5,500 cubic meters per day. The ground elevation at the water side of the dam is at 420.48 m above sea level. NN and its airside at 420.98 m above sea level. NN.

Reservoir

The lake is about 14 hectares (0.14 km ² ) ( other claims to 13.68 acres ( 0.1368 km ²) ) is large. It extends approximately in North - south-southwest direction to almost 1.5 km in length and is in its central portion a maximum of about 200 m wide. It has 1.23 million m³ of storage space and 1.25 million cubic meters of total storage space. Its water level is at 445.98 m above sea level. NN. The catchment area is 5.4 km ². The design flood is 4 m³ / s

Hydroelectric power station

Between the Dam and the city of Nordhausen, the height difference is about 180 meters. This gradient is used to produce energy by means of a Pelton turbine from Siemens. The water flows through a 11 km ( other reportedly 10.6 km ) long cast iron pipe with 400 mm diameter at the elevated tank Osterstraße in a turbine building. The energy generated is approximately 300,000 to 400,000 kWh per year. It is used during the day for operation of Nordhausen tram at night for city lighting.

History

Construction

Despite the 1878 enlargement of the water supply Nordhausen by the construction of the wet well on the Garthoff meadow northwest of Neustadt and a water feed from the Otto tunnel in Ilfeld valley, it always came back to bottlenecks in the drinking water. A report came to the conclusion that this account must be taken only by the construction of a " jam piece". Particularly suitable for this seemed to be an area in which no settlements and no agricultural land are located.

In 1900 was started with the plans to build a dam with a curved gravity dam of masonry after Intze principle. The Nordhäuser city council approved the building on March 17, 1902 28 votes to 6 votes. With an estimated consumption of 100 liters per capita per day (including water for industrial purposes ), the dam for the water supply of about 45,000 people was designed, which corresponded to a required annual water volume of 1.6425 million m³. In March 1904, the work began with land clearing in the area of ​​future impoundment. The project management had the Berlin Hydraulic inspector Mattern held, the site management was in the hands of the government architect and North Town building advice Michael. The work mainly Italian experts were used. The transport of the material was of Neustadt with a field railway. New Town Council Keller ran a canteen hut on the site.

The completion of the dam was planned for 1 December 1904. This date could not be met due to lack of workers and the early dawning and persistent cold. The work was stopped and only resumed in March 1905. Temporary stone deficiency and a strong summer vegetation in the already fully beräumten dam slowed progress further. After weeks of rain and heavy snow was finally held on 13 October 1905, the building inspectorate approval. From 13.43 clock, the water was dammed up, after three days of one-fifth of the storage space was filled. The total construction costs amounted to 1.4 million gold marks.

Conversions

Despite the success of the dam occurred in dry years repeatedly to bottlenecks in the water supply. In addition, the demand for water increased constantly, especially after the construction of the North Housing sewer (1913-1915) and because of the increasing water demand of the Deutsche Reichsbahn.

For these reasons, the city of Nordhausen in 1920 a planning application to increase the dam. The technical requirements for this had already been taken into account in the construction of the dam. In the years 1922 and 1923 the dam was raised with concrete to 6.26 m. The storage volume increased as a result by 385,000 m³.

In the year 1940, immediately downstream of the dam at the reservoir head, and thus the influence of Bach's cancer in the pelvis an approximately 150 m long pre-dam as a settling basin for swimming and suspended solids.

Inspections at irregular intervals, were held from 1965. In 1983, a comprehensive study of the dam condition, the result of which were first rehabilitation work with shotcrete. Further investigations in the years 1990 and 1991 showed the need for a general overhaul. As a first step took place in 1992, a congestion limit to 800,000 m³. This was followed between 1997 and 2001 a general repair after protection of historic monuments. The dam was sealed on the water side with asphalt concrete, the " Intze wedge" was replaced by a seal veil, and at the foot of the dam, a patrol was built. The masonry on the air side of the dam including the slide houses were just like the mural crown rehabilitated. The two intake towers were true to the original and displaced further into the reservoir.

After the amended Drinking Water Ordinance ( Drinking Water 2001), called the treatment of surface water, had to be built for the continued use of dam water for drinking water supply from 2004 to 2007, a water plant in Nordhausen Alexander Pushkin Street.

Hiking

While crossing the dam is prohibited, the reservoir can hike. The dam Neustadt is included as No. 218 in the system of stamp locations of the Harz hiking pin; the stamp box ( ⊙ 51.57891666666710.863472222222 ) is located near the west end of the dam.