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| Schlegeis Reservoir | |
|---|---|
| Name | Schlegeis Reservoir |
| Location | Zillertal Alps, Tyrol, Austria |
| Coordinates | 47°1′N 11°42′E |
| Type | storage reservoir |
| Inflow | Tuxbach |
| Outflow | Tuxbach |
| Catchment | Zillertal |
| Basin countries | Austria |
| Length | 2.2 km |
| Area | 0.2 km² |
| Max-depth | 79 m |
| Volume | 12e6 m³ |
| Dam type | arch-gravity |
| Dam height | 130 m |
| Status | operational |
Schlegeis Reservoir is a high-alpine storage reservoir in the Zillertal Alps of Tyrol, Austria. It lies within the municipal boundaries of Finkenberg, Tyrol and Mayrhofen, and forms part of a hydroelectric system that supplies electricity to regional grids and industrial consumers. The reservoir is notable for its mountainous setting near the Tux Alps, proximity to alpine passes, and its role in hydropower, tourism, and alpine ecology.
The reservoir is situated in the Zillertal valley of Tyrol, within the Zillertal Alps near the Tux Alps foothills, and is accessed from the road to the Tuxerjoch and the village of Ginzling. Surrounded by peaks such as the Olperer and the Giggelekopf, the basin drains a catchment that includes glaciers and high-mountain cirques characteristic of the Eastern Alps. The site sits above the valley floor and forms part of the broader alpine watershed linking to the Inn River catchment that ultimately flows to the Danube.
Proposals for hydroelectric development in the Zillertal date to the early 20th century with interest from companies similar to the historic Verbund AG and industrial actors tied to the electrification of Austrian railways and metallurgical works. Construction of the dam was undertaken in the mid-20th century as part of post-war infrastructure expansion influenced by planners connected to the Austrofrost-era energy initiatives and by regional authorities from Tyrol. Engineering teams collaborating with alpine specialists from institutions akin to the Technical University of Vienna and contractors experienced on projects such as the Kaprun Dam completed the structure, establishing the reservoir as a component of the Zillertal hydropower cascade serving consumers including municipal utilities and industrial users.
The barrier is an arch-gravity dam with a crest height that ranks it among the higher dams in Austria; its structure employs concrete materials and engineering techniques comparable to those used on alpine dams like Mittelbergferner-area projects. The impoundment creates a roughly 2.2-kilometre long lake with a storage capacity in the order of millions of cubic metres, regulated to provide seasonal storage for peaking turbines. The dam includes intake towers, drainage galleries, and spillway works designed to manage alpine runoff and extreme weather events similar in scale to floods documented in the European floods of the late 20th century. Operations adhere to national safety standards overseen by agencies analogous to the Austrian Federal Ministry for Climate Action, Environment, Energy, Mobility, Innovation and Technology.
Inflow to the reservoir derives primarily from the Tuxbach stream and high-elevation snowmelt and glacier runoff from the Zillertal Alps glacier systems, contributing to seasonal variation in storage. The facility is integrated into a cascade network that includes downstream power stations and reservoirs feeding turbine plants modelled on equipment supplied by historic suppliers like Voith and Andritz. Water is managed for peak-load generation, flood attenuation, and regulated release to maintain flows for downstream communities including Mayrhofen and Finkenberg, Tyrol. Operational planning coordinates with national grid operators such as Austrian Power Grid and follows hydrological monitoring approaches used across the Alps for snowpack and glacier melt forecasting.
The reservoir and surrounding alpine habitats support montane and subalpine communities typical of the Eastern Alps, including alpine meadows, larch stands, and scree slopes that provide habitat for species protected under European conservation frameworks like the Natura 2000 network and referenced by Austrian conservation agencies. Fauna in the area includes montane species such as Alpine ibex, chamois, and alpine bird species akin to the golden eagle and alpine chough, while aquatic habitats are influenced by cold oligotrophic conditions affecting trout populations comparable to brown trout in similar Tyrolean waters. Environmental management balances hydropower operations with conservation obligations under directives comparable to the Habitats Directive and regional biodiversity strategies championed by institutions such as the Austrian Nature Conservation authorities.
The reservoir is a focal point for alpine tourism in the Zillertal region, attracting hikers, cyclists, and photographers traveling from resorts like Mayrhofen and Hippach. Trails and via ferrata routes nearby connect to alpine huts affiliated with the Austrian Alpine Club, while seasonal activities include snowshoeing linked to winter sports destinations such as the Ski Juwel Alpbachtal Wildschönau network. The site’s dramatic dam face and mountain backdrop are popular for sightseeing tours organized by regional tourist boards like the Zillertal Tourism agencies, and the area features in promotional material alongside neighboring attractions including the Zillertal Arena.
Access is provided by a mountain road branching from the main valley roads serving Mayrhofen and Finkenberg, Tyrol, with parking and visitor facilities near the dam engineered to accommodate tourist traffic and maintenance vehicles. Infrastructure supports guided tours, viewing platforms, and safety measures comparable to those at other alpine dams such as Kaprun, and emergency response coordinates with local services including the Austrian Alpine Rescue organizations. Public transport connections reach the valley centers via rail links on routes associated with the Austrian Federal Railways network, from which local buses and shuttle services provide onward access to the reservoir road.
Category:Reservoirs in Austria