H1 2026 Evaluation
Papua New Guinea Reservoir Transparency
F3Opaque — Ranked #128 out of 167 countries
weight 30%
weight 20%
weight 15%
weight 13%
weight 10%
weight 8%
weight 5%
Primary source evaluated
PNG Power Limited — pngpower.com.pg (operator of Yonki/Ramu 1 and Sirinumu)
https://pngpower.com.pgDimension breakdown
Data Availability
20% of total score
Coverage is 0 (no national reservoirs >10 hm³ with public data). Quality dimensions for the COVERED subset are therefore 0 by definition. Original notes preserved below: No current reservoir storage volume is publicly accessible online. PNG Power Limited's website (pngpower.com.pg) is effectively empty — it renders only a footer crediting its developer, with no data, reports, or links. The National Energy Authority (nea.gov.pg) similarly returns no retrievable content. News outlets (Inside PNG, The National) reported a critical low-water event at Yonki Dam in November 2025, describing generation at '35% of total capacity', but cited no numerical storage measurement and referenced no public data source. No government dashboard, bulletin, or downloadable dataset for reservoir levels was found through exhaustive search.
Technical Accessibility
15% of total score
Coverage is 0 (no national reservoirs >10 hm³ with public data). Quality dimensions for the COVERED subset are therefore 0 by definition. Original notes preserved below: No REST API, structured data endpoint, open file format (CSV, JSON, XML), or machine-readable feed of any kind has been identified for PNG reservoir data. The PNG Environment Data Portal (png-data.sprep.org, operated by CEPA/SPREP) returned HTTP 403 during evaluation and, based on available descriptions, contains environmental and WaSH datasets with no reservoir storage dimension. No registration-gated data portal was found either. The technical accessibility barrier is absolute: there is no mechanism by which a researcher can programmatically retrieve current or historical reservoir storage data.
Coverage
30% of total score
Methodology v1.3.0 (capacity-weighted). Papua New Guinea's qualifying reservoirs total approximately 335 hm³ (Yonki Dam on the Ramu River, 335 hm³; Sirinumu on the Laloki is ~26 hm³ borderline). Neither has any publicly accessible storage monitoring data: PNG Power's corporate website renders essentially blank, the National Energy Authority site is inaccessible, and crisis statements during El Niño droughts cite generation percentages rather than storage values. Covered capacity is 0 hm³. Coverage = round(100 × 0 / 335) = 0.
Historical Depth
13% of total score
Coverage is 0 (no national reservoirs >10 hm³ with public data). Quality dimensions for the COVERED subset are therefore 0 by definition. Original notes preserved below: No machine-readable historical reservoir storage time series is publicly accessible. The only historical hydrological records found are: (1) a JICA baseline survey PDF covering pre-2002 river gauging data; (2) World Bank and Tandfonline appraisal documents from the 1980s describing design-phase hydrology for the Yonki project. River gauging data for PNG rivers up to 31 December 1964 is available on the PNG Environment Data Portal as a legacy dataset, but this covers streamflow, not reservoir storage volume, and predates the dam's construction (completed 1991). No post-commissioning time series in any format exists in the public domain.
Update Frequency
10% of total score
Coverage is 0 (no national reservoirs >10 hm³ with public data). Quality dimensions for the COVERED subset are therefore 0 by definition. Original notes preserved below: No regular publication schedule exists. The only public signals of reservoir status are ad-hoc press statements issued by PNG Power during crisis events (e.g., load-shedding announcements during El Niño droughts in 2014–15 and again in late 2025). These are reactive communications, not scheduled data releases. Normal operating conditions generate no public updates whatsoever. There is no daily, weekly, monthly, or annual reservoir bulletin from any government or regulatory body in PNG.
Methodological Transparency
8% of total score
Coverage is 0 (no national reservoirs >10 hm³ with public data). Quality dimensions for the COVERED subset are therefore 0 by definition. Original notes preserved below: No public documentation of measurement methodology has been found for any PNG reservoir. PNG Power does not publish sensor specifications, gauge calibration records, or data quality standards. The National Energy Authority's website was inaccessible. The PNG NRI has published policy research noting that 'several barriers restrict the availability of quality data for making informed decisions' in Papua New Guinea, confirming that methodological transparency is a systemic gap rather than an isolated omission. Historical World Bank and JICA project documents describe design-stage hydrology methods, but these are one-off appraisals, not operational monitoring protocols.
Language and Usability
5% of total score
English is one of Papua New Guinea's three official languages (alongside Tok Pisin and Hiri Motu) and is the language of government, law, and formal business. All identified PNG government and operator websites (PNG Power, NEA, NRI, CEPA) are in English. News articles about reservoir conditions are published in English. The language barrier for an international English-speaking researcher is therefore minimal. The score is held below the maximum because the websites and portals that do exist in English contain no reservoir data — English accessibility confers no practical transparency benefit in this case.
Evaluator notes
Papua New Guinea scores in the lowest tier (F) on the RTI 2026 index. The country possesses meaningful hydropower storage infrastructure — Yonki Dam (335 Mm³) on the Ramu River and Sirinumu Dam near Port Moresby are the two principal reservoirs, both operated by PNG Power Limited — but no public data infrastructure exists to monitor or disclose reservoir conditions. PNG Power's corporate website renders essentially blank in 2026; the National Energy Authority's site is similarly inaccessible. Crisis communications issued during severe El Niño droughts (2014–15, late 2025) confirm that internal monitoring exists at the operational level, as PNG Power references generation percentages during load-shedding events, but this data never reaches a public-facing platform. The PNG Environment Data Portal (png-data.sprep.org), launched in 2019 and supported by SPREP and CEPA, is the country's most credible open data infrastructure, but its water datasets cover quality and sanitation rather than reservoir storage volumes. Legacy hydrological records (river gauging up to 1964, World Bank and JICA project appraisals from the 1980s–2000s) exist as PDF documents but predate the operational era of both major reservoirs and are not machine-readable time series. The PNG National Research Institute has explicitly documented data availability as a systemic policy challenge. The only dimension on which PNG scores above the floor is language usability: English is an official language and all identified official communications are in English, meaning that if data were published, it would be internationally accessible. Improvement pathways exist through ADB's ongoing Port Moresby Power Grid Development Project (which includes environmental and social monitoring obligations) and potential integration of reservoir reporting into the national SDG data portal framework, but neither delivers public reservoir storage data as of the 2026 evaluation date.
Evaluated by Jaime Delgado · 2026-09-15 · Methodology v1.3.0