Petershagen barrage

Petershagen barrage
	Petershagen barrage
	location
Coordinates	52 ° 22 '3 " N , 8 ° 58' 50" E Coordinates: 52 ° 22 '3 " N , 8 ° 58' 50" E
country	Germany
place	Petershagen
Waters	Weser
Kilometers of water	km 213.985
	f1
	power plant
owner	Statkraft Markets GmbH Petershagen power plant
Start of planning	1929
construction time	1934/1953
Start of operation	17th October 1953
	technology
Bottleneck performance	3.3 megawatts
Average ; height of fall	6 m
	Others

The Petershagen barrage is a dam with run-of-river power station on the Mittelweser at river kilometer 214 of the Weser . The name of the barrage is derived from the nearby East Westphalian town of Petershagen in North Rhine-Westphalia .

location

The Petershagen barrage is located on a loop of the Weser and is formed from the Petershagen weir with the run-of-river power plant , the shipping canal with the Petershagen lock , and the weir ancillary structures. A boat lane has been set up for small pleasure craft . A footbridge leads over the weir from the right bank to the left bank of the Weser, but it can only be used for a limited period of time. It is usually closed from November to mid-March. The barrage is one of six barrages that form a chain and regulate the water flow of the Mittelweser and guarantee a diving depth of 2.50, so that the Mittelweser from Minden to Bremen can be navigated by barge all year round.

history

In order to achieve a full waterway between Minden and Bremen on the Mittelweser and thus access for inland navigation from the North Sea to the Mittelland Canal at the Minden waterway junction , the Reich waterway administration began building a barrage control system for the Mittelweser section in 1934. This was interrupted by the effects of the war in 1941 and then resumed after the Second World War. The construction of the run-of-river power plants next to the barrage was carried out by Preussische Elektrizität AG (PRESAG).

The construction of the Petershagen barrage was the most advanced of the barrages planned on the Mittelweser by 1941, because with this barrage the necessary immersion depths on the Weser for the delivery of coal to the Lahde power plant from the Ruhr area by ship via the Mittelland Canal and the Weser were made possible . The 11-kilometer Weser stretch from the Minden waterway intersection to the Lahde power plant was made possible by the damming of the Petershagen barrage, which was then 2 meters deep. Therefore, the construction project was implemented with the highest priority after the war. The barrage was opened on October 17, 1953, the power plant on May 7, 1951.

technology

The Petershagen weir consists of three weir fields with movable elements. Motor elements that control the weir are housed in each of the towers between the weir fields. The weir fields are 30, 30 and 40 meters wide. The weir field consists of a 5.5 meter high three-belt gate with attached fish-belly flap. This can be opened in the event of a storming flood, thus reducing the flow resistance.

The hydropower plant was built by the Prussian state and operated by PreußenElektra , which was merged into E.ON Wasserkraft GmbH in 2000 . Through an exchange of shares with the Norwegian energy company Statkraft , the latter has been the owner and operator of the power plant since January 1, 2009. The power plant in Petershagen is operated from the power plant in Döverden, from where all other run-of-river power plants in the Mittelweser are operated, while the power plants are monitored from a central control room in the pumped storage plant in Erzhausen .

The power plant with its three Kaplan turbines , whose spiral casings are designed in a siphon design, has an installed capacity of 3.3 MW and produces 18 GWh per year , which corresponds to an average output of 2 MW.

gallery

Open weir step to allow flood water to flow away
Fish-bellied flap of the weir step. The coloration shows the usual inclination of the fish flap, which was lowered due to the high water.
The weir from the bottom