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Pumped Storage Hydro

Cruachan Power Station (Hollow Mountain)

Argyll and Bute, Argyll and Bute, PA33 1AN

Cruachan is a 440 MW pumped storage hydro project in Scotland. The applicant or operator on record is Drax (formerly Scottish Power). It is recorded as operational since January 1966. The determining authority is Argyll and Bute.…

Operational Β· Since 1966
Official register: July 2026

Recorded status: Operational. Source record updated 2020-08-18.

Registered planning capacity; not measured generation.

DESNZ source publication Β· Search the full register Β· Definitions and coverage

440.000 MW
Registered Capacity
1966
Commissioned

πŸ“‹ Project Overview

Cruachan is a 440 MW pumped storage hydro project in Scotland. The applicant or operator on record is Drax (formerly Scottish Power). It is recorded as operational since January 1966. The determining authority is Argyll and Bute.

Site Schematic

UPPER RES. LOWER RES. PENSTOCK TAILRACE GEN. GRID ⇑ PUMP ⇓ GENERATE HEAD: ?m Β· POWER: 440.000 MW Β· ? turbines

Schematic diagram β€” not to scale. Illustrative layout based on project specifications.

πŸ”§ Technical Specifications

Capacity (MW)440.000 MW

πŸ”Œ Grid Connection & Infrastructure

🏒 Development & Ownership

DeveloperDrax (formerly Scottish Power)
Owner / operatorDrax (formerly Scottish Power)
Construction started1961
Commissioned / target1966
LocationArgyll and Bute, Argyll and Bute, PA33 1AN
RegionScotland
Coordinates56.4111524Β°N, 5.1134509Β°W

Additional published register fields

Registered technologyPumped Storage Hydroelectricity

πŸ“… Project Timeline

1961-01-01
1966-01-01