flussplan e.U.
Corporate brand
UnclaimedAustrian civil engineering office specialising in hydropower, water management, flood protection and hydraulic modelling.
Last updated September 28, 2026
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Overview
flussplan e.U. (also presented as flussplan ZT GmbH) is an Austrian civil engineering office (Zivilingenieurbüro) founded in 2017 by DDipl.-Ing. Regina Mayer MA. Based in Tirol, the firm provides engineering services together with extensive technical and economic consulting, planning and delivering complete projects for clients. Its work is concentrated in the fields of Kulturtechnik (rural/cultural engineering) and Wasserwirtschaft (water management). The company's four declared specialisms are hydropower and energy management (from micro-hydropower plants to large installations, new builds and revitalisations, plus pipeline infrastructure); flood protection and water management (flood defence, torrent and river training, renaturation, water and wastewater infrastructure); modelling and simulation (flow and sediment behaviour, 3D planning and BIM, hydrological analyses); and consulting and management (permitting procedures, planning and construction management, client representation, site supervision and advisory work). flussplan operates as a compact, innovative firm that reinforces its project teams through a strong partner network, allowing it to bring in specialist expertise and project resources as required. Its managing director, Regina Mayer, is a state-authorised and sworn engineering consultant (Ingenieurkonsulentin) for both Kulturtechnik und Wasserwirtschaft and Mountain Risk Engineering (alpine natural hazards), with two decades of experience leading and supporting projects of up to EUR 150 million in volume. She is also active in the Chamber of Civil Engineers (Kammer der Ziviltechniker:innen) for Tirol and Vorarlberg, focusing on the award of engineering services, digitalisation and BIM, and sustainability. The firm is embedded in a long-established office community: the engineering office Sprenger has been a force in Austria's water and infrastructure sector since 1966 and is now in its second generation. flussplan's reference projects include hydropower plants at Schöngrabenbach (St. Anton am Arlberg), Ötztaler Ache (Tumpen-Habichen), Brixentaler Ache (Hopfgarten), Wiesberg, Sendersbach, Pass Strub, Koberboden and Mühlauer Bach; hazard zone planning for the Dorfbach in Biberwier; a continuity measure on the Trisanna; an organism migration aid (fish lift lock) and residual-water power plant at the Ruetz weir; and hydropower projects in Japan (Akagisawa HPP and Tangegawa HPP). It also prepares flood assessments and advisory work for planned developments in locations such as Kramsach, Münster, St. Johann in Tirol, Schwendt, Längenfeld, Eben am Achensee and Fügen. The company maintains a presence on LinkedIn and Instagram.
History
flussplan e.U. was founded in 2017 by DDipl.-Ing. Regina Mayer MA as a civil engineering office (Zivilingenieurbüro) for Kulturtechnik und Wasserwirtschaft. From the outset the firm combined engineering services with technical and economic consulting, planning and delivering complete projects for clients. The founder brought two decades of experience in leading and supporting projects of up to EUR 150 million in volume, and holds state authorisation as a sworn engineering consultant for both Kulturtechnik und Wasserwirtschaft and Mountain Risk Engineering (alpine natural hazards). She is also a functionary of the Chamber of Civil Engineers (Kammer der Ziviltechniker:innen) for Tirol and Vorarlberg, with a focus on the award of engineering services, digitalisation and BIM, and sustainability. The company is embedded in a long-standing office community. The engineering office Sprenger has been active in Austria's water and infrastructure sector since 1966 and is now in its second generation, providing a stable professional environment for flussplan's operations. Over its history flussplan has built a portfolio of reference projects in hydropower, flood protection and water management. Hydropower references include plants at Schöngrabenbach (St. Anton am Arlberg), Ötztaler Ache (Tumpen-Habichen), Brixentaler Ache (Hopfgarten), Wiesberg, Sendersbach, Pass Strub, Koberboden and Mühlauer Bach, as well as international projects in Japan (Akagisawa HPP and Tangegawa HPP). Water management and flood protection work includes hazard zone planning for the Dorfbach in Biberwier, a continuity measure on the Trisanna, and an organism migration aid (fish lift lock) with a residual-water power plant at the Ruetz weir. The firm also prepares flood assessments and advisory work for planned developments in Kramsach, Münster, St. Johann in Tirol, Schwendt, Längenfeld, Eben am Achensee and Fügen. flussplan describes itself as a compact, innovative company that reinforces its project teams through a strong partner network, ensuring the necessary specialist knowledge and ideal project resources are available at all times. It maintains a public presence on LinkedIn and Instagram and recruits engineering staff as it grows.
- 2017
flussplan e.U. founded by DDipl.-Ing. Regina Mayer MA as a civil engineering office for Kulturtechnik und Wasserwirtschaft.
- 1966
Office community partner Ingenieurbüro Sprenger begins operations in Austria's water and infrastructure sector (now in its second generation).
Products and positioning
Compact, innovative Austrian civil engineering office for water management and hydropower, leveraging a strong partner network to scale project teams.
Wasserkraft (Hydropower)
Micro-hydropower to large installations, new builds or revitalisation, and pipeline infrastructure.
Hochwasserschutz / Wasserwirtschaft (Flood protection / Water management)
Flood protection, torrent and river training, renaturation, water and wastewater infrastructure.
Modellierung / Simulation (Modelling / Simulation)
Flow and sediment behaviour, 3D planning and BIM, hydrological analyses.
Beratung / Management (Consulting / Management)
Permitting procedures, planning and construction management, client representation, site supervision, consulting.
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