Zillergründl Dam
{{Infobox dam
| name = Zillergründl Dam
| name_official =
| image = Speicher Zillergründl 08.jpg
| image_size = 400px
| image_caption =
| image_alt =
| location_map = Austria
| location_map_size =
| location_map_caption =
| coordinates = {{coord|47|07|15|N|12|03|43|E|type:landmark|display=inline,title}}
| country = Austria
| location =
| status = O
| construction_began = 1981
| opening = 1986
| demolished =
| cost =
| owner = Verbund AG
| dam_type = Arch, variable-radius
| dam_height = {{Convert|186|m|ft|0|abbr=on}}
| dam_height_thalweg =
| dam_height_foundation=
| dam_length = {{Convert|502|m|ft|0|abbr=on}}
| dam_width_crest = {{Convert|6|m|ft|0|abbr=on}}
| dam_width_base = {{Convert|36|m|ft|0|abbr=on}}
| dam_volume = {{Convert|1373000|m3|cuyd|0|abbr=on}}
| dam_elevation_crest ={{Convert|1850.7|m|ft|0|abbr=on}}
| dam_crosses = Ziller River
| spillway_count =
| spillway_type =
| spillway_capacity =
| res_name = Zillergründl Reservoir
| res_capacity_total = {{Convert|89500000|m3|acre.ft|0|abbr=on|lk=out}}
| res_capacity_active ={{Convert|88800000|m3|acre.ft|0|abbr=on|lk=out}}{{cite web|title=Zillergründl Dam Austria|url=http://www.strabag-international.com/databases/internet/_public/content.nsf/27f1abc7e30c3309c12571e0003f78c7/29bf47f041696721c12577a50031e7c1/$FILE/Zillergr%C3%BCndl_Dam.pdf|publisher=STRABAG|access-date=7 August 2011}}{{Dead link|date=September 2023 |bot=InternetArchiveBot |fix-attempted=yes }}
| res_capacity_inactive=
| res_catchment = {{Convert|67|km2|sqmi|0|abbr=on}}{{cite web|title=Zillergründl|url=http://www.atcold.at/en/dams?sobi2Task=sobi2Details&catid=2&sobi2Id=259|archive-url=https://archive.today/20130114192600/http://www.atcold.at/en/dams?sobi2Task=sobi2Details&catid=2&sobi2Id=259|url-status=dead|archive-date=January 14, 2013|publisher=Austrian National Committee on Large Dams|access-date=7 August 2011}}
| res_surface =
| res_elevation ={{Convert|1850|m|ft|0|abbr=on}}
| res_max_depth =
| res_max_length =
| res_max_width =
| plant_hydraulic_head = {{Convert|744|m|ft|0|abbr=on}}
| res_tidal_range =
| plant_name = Häusling Power Plant
| plant_coordinates = {{coord|47|08|46|N|11|58|02|E|type:landmark}}
| plant_operator =
| plant_commission = 1986-1988
| plant_decommission =
| plant_type =
| plant_turbines = 2 x 180 MW Francis-type
| plant_capacity = 360 MW
| plant_annual_gen = 179.4 GWh
| website =
| extra =
}}
The Zillergründl Dam is an arch dam on the Ziller River in the upper Ziller Valley of Tyrol state, Austria. It lies {{Convert|16|km|mi|0|abbr=on}} east of Mayrhofen. The primary purpose of the dam is hydroelectric power generation and it supports a 360 MW pumped-storage power station. As part of the Zemm-Ziller Development, construction on the dam began in 1981 and, along with the Häusling Pumped Storage Power Plant, it was completed in 1986. The power plant was fully commissioned by 1988. The dam is the second tallest in Austria.
Design and operation
At an elevation of {{Convert|1850.7|m|ft|0|abbr=on}} above sea level, the Zillergründl is a {{Convert|186|m|ft|0|abbr=on}} tall and {{Convert|502|m|ft|0|abbr=on}} long variable-radius arch dam with a structural volume of {{Convert|1373000|m3|cuyd|0|abbr=on}}. The dam is {{Convert|6|m|ft|0|abbr=on}} wide at its crest and {{Convert|36|m|ft|0|abbr=on}} at its base. Its reservoir has a capacity of {{Convert|89500000|m3|acre.ft|0|abbr=on|lk=out}}, of which {{Convert|88800000|m3|acre.ft|0|abbr=on|lk=out}} is active (or "useful") capacity. At normal levels, the reservoir has a catchment area of {{Convert|67|km2|sqmi|0|abbr=on}}. The reservoir operates at elevations from {{Convert|1850|m|ft|0|abbr=on}} to {{Convert|1740|m|ft|0|abbr=on}}, which is the draw-down level.
Water released from the reservoir reaches the Häusling Power Plant {{Convert|10|km|mi|0|abbr=on}} downstream. The power plant is located at an elevation of {{Convert|1060|m|ft|0|abbr=on}} and contains two 180 MW Francis turbine-generators. It is afforded {{Convert|744|m|ft|0|abbr=on}} of hydraulic head given the difference in elevations.{{cite web|title=Hydraulic Machines for hydroelectric stations|publisher=ANDRITZ}} Using its pumped-storage capability, the power-station receives water from the Stillupp Reservoir {{Convert|8|km|mi|0|abbr=on}} to the west in an adjacent valley at {{Coord|47|07|17|N|11|51|58|E|name=Stillupp Dam}} and pumps it up to the Zillergründl Reservoir. The pumping and replenishment of the reservoir occur at night, during low energy demand periods. The process is repeated; electricity is generated during high-demand periods and pumping occurs during low-demand periods when electricity is cheaper.{{cite journal|last1=Jacobs|first1=S.|first2=A.|last2=Blauhut|first3=P.|last3=Schöberl|title=Long term deformation of Zillergründl rock foundation|journal=Long Term Behaviour of Dams|year=2009|volume=B|issue=9|url=http://lamp3.tu-graz.ac.at/~ltbd09/cms_new/papers/63614.pdf|access-date=7 August 2011|publisher=Graz University of Technology}}{{Dead link|date=September 2023 |bot=InternetArchiveBot |fix-attempted=yes }}{{cite web|title=HÄUSLING|url=http://www.andritz.com/de/ANONIDZ2843DA7639D30688/hydro-references-large-hydro-haeuslind|publisher=ANDRITZ|access-date=7 August 2011|language=de}}{{cite web|title=Our Power Plants - the Heart of VERBUND (See #38)|url=http://www.verbund.com/cc/en/about-us/our-power-plants|publisher=Verbund AG|access-date=7 August 2011|archive-date=6 August 2011|archive-url=https://web.archive.org/web/20110806114705/http://www.verbund.com/cc/en/about-us/our-power-plants|url-status=dead}}
See also
{{stack|{{Portal|Austria|Water|Renewable energy}}}}
References
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Category:Dams completed in 1986
Category:Energy infrastructure completed in 1986
Category:Hydroelectric power stations in Austria
Category:Pumped-storage hydroelectric power stations in Austria
Category:Lakes of Tyrol (federal state)
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