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| Schlegeisspeicher | |
|---|---|
| Name | Schlegeisspeicher |
| Location | Zillertal Alps, Tyrol, Austria |
| Coordinates | 47°N 11°E |
| Type | Reservoir, Dam |
| Inflow | Schlegeisbach |
| Outflow | Schlegeisbach |
| Basin countries | Austria |
| Length | 2.1 km |
| Area | 1.18 km² |
| Max-depth | 131 m |
| Volume | 108,000,000 m³ |
| Elevation | 1,796 m |
Schlegeisspeicher is a high-altitude reservoir and dam complex in the Zillertal Alps of Tyrol, Austria, serving as a major component of regional hydroelectric infrastructure and a destination for alpine tourism. It combines civil engineering, alpine ecology, and renewable energy production while interfacing with regional transport, recreation, and conservation networks. The site is notable for its proximity to glacial environments, mountain passes, and Tyrolean cultural landmarks.
Schlegeisspeicher lies in the Zillertal Alps within the state of Tyrol (state), near the municipality of Finkenberg and close to the Tux Alps and Austrian Central Alps. The reservoir occupies a glacially carved valley beneath peaks such as the Olperer, Rosaspitze, and Hoher Riffler, and sits upstream of the Inn (river) catchment that connects to broader Alpine river systems including the Danube River via tributaries. Nearby geographic features include the Ziller, Zillertal, Tuxer Joch, Gefrorene-Wand Spitze, and the Stubai Alps to the west, with proximity to crossings such as the Brenner Pass and valleys like the Zemmgrund. The area falls within alpine climatic zones influenced by orographic precipitation patterns documented across the Eastern Alps and interacts with glacial remnants from the Pitztal Glacier and Königspitze regions.
Planning for the reservoir took place in the context of interwar and postwar Austrian infrastructure development influenced by entities such as Verstaatlichte Eisenbahnen-era planners and later companies comparable to VERBUND AG and regional utilities tied to Tiroler Wasserkraft initiatives. Construction began during the mid-20th century, drawing on engineering precedents from projects like the Kaprun hydroelectric plant, the Mauvoisin Dam and the Grande Dixence, and involved contractors and design offices similar to Hochtief and continental firms experienced with Alpine masonry and concrete gravity dams. The project intersected with regional political frameworks including the State of Tyrol administration and national energy planning under postwar Austrian cabinets. Construction mobilized alpine logistics comparable to those used at Gotthard Base Tunnel works, integrating access roads, cableways akin to Eibsee cable car systems, and temporary worker settlements influenced by labor movements present in Austrian Trade Union history. The completed dam became operational in the late 1960s, contemporaneous with other European hydro projects such as Icelandic hydropower expansions and Swiss reservoir developments like Lac de la Gruyère.
The dam is a concrete-gravity structure with specifications analogous to major Alpine dams such as Mattmark, Kaprun and Mauvoisin, featuring a crest, spillway, and outlet works designed to manage alpine runoff and glacial meltwater. The reservoir extends approximately 2.1 km in length with a surface area near 1.18 km², maximum depth approaching 131 m, and a storage capacity around 108 million m³, comparable in scale to reservoirs like Lago di Lei and Lago di Cancano. Engineers incorporated seismic considerations similar to designs used in the Alpine Convention region and followed standards embraced by organizations like the International Commission on Large Dams and European regulatory frameworks such as directives of the European Union. The dam’s instrumentation and monitoring regimes mirror practices seen at Hoover Dam-class installations, with piezometers, inclinometers, and remote telemetry tied to regional control centers.
Schlegeisspeicher functions as part of a pumped-storage and conventional hydroelectric system feeding turbines and balancing load within the Tyrolean grid operated by entities analogous to VERBUND and regional utilities connected to the Austrian Power Grid. Water is routed to downstream powerhouses in cascades reminiscent of systems at Lünersee and Pragser Wildsee-linked schemes, contributing to peak-load management similar to Badger-scale storage concepts and integrated with national renewable strategies promoted alongside projects like Güssing biomass and Windpark Hoher initiatives. Operational coordination involves the transmission network linked to substations comparable to Kundl and interconnections with transnational corridors such as those used by Austro-German power exchanges and the ENTSO-E framework. The plant supports grid stability, frequency control, and ancillary services in line with EU energy policy and interacts with market mechanisms seen in exchanges like EEX.
Environmental management around the reservoir engages conservation principles from the Alpine Convention and regional agencies similar to the Tyrolean Nature Conservation Authority, addressing impacts on habitats, hydrology, and glacial retreat driven by climate change. Measures include flow regime adjustments, sediment management informed by studies at Rhône Glacier-affected basins, and biodiversity monitoring akin to programs in Nationalpark Hohe Tauern and Natura 2000 networks. Stakeholders include municipalities like Mayrhofen, tourism boards, and NGOs paralleling WWF Austria and Greenpeace in advocacy for riverine and alpine species protection, with adaptive management strategies responding to melting patterns observed at Pasterze Glacier and alpine permafrost research conducted by institutes such as the Austrian Academy of Sciences.
The site is a focal point for alpine tourism comparable to attractions at Zermatt, Kitzbühel, and Hallstatt, drawing hikers, mountaineers, and sightseers to trails leading toward summits like the Olperer and through valleys comparable to the Tux Valley. Recreational activities include trekking along routes linked to the Alpine Club (Austria) network, guided glacier tours similar to offerings near the Grossglockner High Alpine Road, and cableway access reminiscent of installations at Hintertux Glacier. Visitor services coordinate with regional tourism organizations such as the Tyrol Tourist Board and local municipalities like Finkenberg and Mayrhofen, while accommodation options range from alpine huts affiliated with the Austrian Alpine Club to hotels promoted in broader Tyrolean guides.
Access to the reservoir is via mountain roads branching from the Zillertal Straße and regional arteries connecting to the Inntal Autobahn (A12), with nearest rail services on lines serving stations like Mayrhofen and links to the ÖBB network and international routes toward Innsbruck Hauptbahnhof and crossings such as the Brenner Pass. Seasonal shuttle services, cable cars, and hiking trails provide last-mile access, paralleling transport arrangements used for sites like the Grossglockner High Alpine Road and managed in coordination with local transport authorities and operators comparable to PostBus Austria and regional cableway companies. Emergency and rescue coordination involves alpine organizations such as the Austrian Alpine Club rescue services and the Red Cross (Austria) in regional contingency planning.
Category:Reservoirs in Austria Category:Dams in Tyrol Category:Hydroelectric power stations in Austria