Mapragg

Mapragg pumped hydro overview.

Mapragg is the pumped-storage stage of the Sarganserland hydropower scheme in the Tamina valley, St. Gallen. It generates from water stored at Gigerwald and can pump water back uphill from the Mapragg balancing reservoir. The station is operated by Kraftwerke Sarganserland AG and is distinct from the downstream Sarelli station.In OperationSwitzerland

At a Glance

Turbine nameplate capacity

280 MW

Energy storage

Data coming soon

Operator

Data coming soon

Country

Switzerland

Location

46.948°, 9.481°

Website

Official project page

Ownership

3 records

Share	Role	Details	Period
Unknown	Indirect Parent	Axpo Power AG holds 98.5% of Kraftwerke Sarganserland AG, the company operating Mapragg.	Current / not dated
Unknown	Indirect Parent	The Canton of St. Gallen holds 1.5% of Kraftwerke Sarganserland AG.	Current / not dated
Unknown	Owner Operator	Kraftwerke Sarganserland AG owns and operates the Mapragg hydropower installation.	Current / not dated

Organisations

4 records

Organisations recorded as working on this asset or its project, and their role.

Organisation	Role	Details
Axpo Power AG	Operator	Not set
	Hydropower owner and operatorOwner Operator	Operates the Mapragg pumped-storage station and the associated reservoir system.
	Turbine corrosion-protection contractorOperations Maintenance	Documents corrosion-protection work for turbine renewal within the Sarganserland hydropower scheme.
	Reservoir sediment-removal contractorOperations Maintenance	Undertook sediment dredging at the Mapragg balancing reservoir during the 2026 works programme.

Supplier registration

Developer supplier portal

How suppliers get onto this project's radar: its standing register, supplier portal or contact route.

Potential suppliers can introduce their products and services through the group’s procurement contact form. The form provides a portfolio-wide route for initial supplier engagement.

Axpo portfolio-wide supplier introduction, rather than a dedicated register for Mapragg.

Supply chain pageContact page

SourceChecked 28 Oct 2026

Capacity history

Recorded project capacity figures. Future-dated changes are shown but are not used as current capacity.

Effective	Capacity type	Capacity	Source
Current	Technical capacity	159 MW	Sandstrahlwerk First — Mapragg pumping equipment rating, separate from generating power
Current	Turbine nameplate capacity	280 MW	Swiss Committee on Dams — Mapragg turbine rating

Wind [m/s]

Wave [m]