Andorra Reservoir Transparency

FEDA operates the Engolasters Lake reservoir (reservoir built 1932-34, ~0.9 Mm³) as the primary head for the Escaldes hydroelectric plant (~17 MW). The FEDA website publishes daily hydroelectric production figures (energia-i-meteo/energia section), from which reservoir operational state can be partially inferred. However, direct reservoir water-level or storage-volume data is not published. The published metric is energy output (kWh or MWh), not storage percentage or level in metres. FEDA Cultura provides detailed descriptive and historical content about the reservoir and hydroelectric network but no operational data feeds.

The FEDA website is modern and well-maintained, consistent with an EU-adjacent governance standard. The energia-i-meteo section appears to present data in HTML tables or charts. However, no API endpoint, no CSV/JSON download, and no structured data feed has been identified. FEDA Cultura is a rich educational/cultural platform but does not expose operational reservoir data in machine-readable format. A demand-response and remote reservoir technology initiative has been reported (Alto.ad, December 2024), suggesting internal telemetry capability exists.

Methodology v1.3.0 (capacity-weighted). Andorra's hydroelectric storage is dominated by Engolasters Lake (~12 hm³ at 1,616 m elevation, FEDA, head pond for the 17 MW Escaldes plant), with small ancillary pondages (Creussans, Juclar) below the threshold. Total national reservoir capacity above the 10 hm³ threshold is approximately 12 hm³. FEDA publishes daily hydroelectric generation figures (energia-i-meteo section) from which reservoir operational state can be partially inferred, but reservoir level/volume is not directly published. Covered capacity (Engolasters via generation proxy) is approximately 6 hm³. Coverage = round(100 × 6 / 12) = 50.

FEDA's energia section likely presents recent production data (days to months), but a multi-year downloadable historical series of reservoir levels or production has not been identified. FEDA Cultura offers historical narrative going back to the 1930s construction of Engolasters Dam, but this is qualitative history, not a quantitative time series. The remote reservoir monitoring initiative (2024) suggests improved internal data collection going forward.

FEDA publishes daily hydroelectric production data on its energia-i-meteo page, indicating a consistent daily publication cadence for generation figures. This is meaningful operational transparency relative to the country's peers in this cohort. However, the published metric is energy output, not reservoir storage — the frequency of publication does not compensate for the absence of the relevant data type.

FEDA's institutional documentation (annual reports, regulatory submissions) describes the hydroelectric system architecture in technical terms. The FEDA Cultura hydroelectric-way resource explains the physical system in accessible detail, including how lake levels connect to generation. However, no specific measurement protocol for Engolasters lake level monitoring, no sensor specification, and no uncertainty documentation has been found in public sources. EU-adjacent governance norms imply higher methodological standards internally than are publicly disclosed.

FEDA's website is available in Catalan (primary), with significant content also in French and Spanish. English is not prominently available. The FEDA Cultura site offers some English content on the hydroelectric way. International users fluent in any Romance language can navigate the site comfortably, but the absence of an English interface reduces accessibility for the broader international audience. Andorra's trilingual governance (Catalan/French/Spanish) is well served.