Sirma Run-Of-River Hydro Project

Integrity

Additionality is relatively strong because the validation/verification documentation indicates an investment test and confirmation by the VVB. Baseline setting is project-specific (per the monitoring record) and relies on a grid emission factor with a stated data year (2018), but the 2025 monitoring report lists several corrective actions (including assessing regulatory surplus and clarifying methodology applicability), which weakens confidence in baseline validity and quantification rigor. Leakage is treated as negligible with a 0% deduction in the 2025 monitoring report, but earlier monitoring documentation indicates leakage was not addressed, which is an integrity-relevant inconsistency. As an avoidance renewable energy project, reversal risk is low and no reversals are reported, but no buffer pool contribution is stated in the extracted record.

Transparency

The extracted record includes key MRV elements such as the monitoring period (2019-06-07 to 2023-12-31), the methodology (AMS-I.D v18.0), the VVB name (Re Carbon Ltd.), and matching claimed and verified ERs in the latest record (25,064). However, transparency is reduced by internal inconsistencies across monitoring reports on whether leakage was addressed and on safeguards/grievance disclosures, making it harder for third parties to track stable MRV assumptions over time. The presence of multiple corrective actions in the 2025 monitoring report also signals that important explanatory content (e.g., net ER equation, applicability conditions) needed improvement to be fully transparent.

Claim Safety

The project is explicitly not CORSIA-eligible, which reduces the risk of high-impact aviation claims and some double-claiming concerns. The largest claim-safety issue is the contradiction in verified ERs between validation reports (25,064 in the 2025-05-29 validation report versus 58,070 in the 2021-09-23 validation report), which creates uncertainty about what volume is supportable for marketing claims. Leakage is asserted as negligible with a 0% deduction in the 2025 monitoring report, but earlier documentation indicates leakage was not addressed; this inconsistency increases perceived over-crediting risk even if leakage is likely small for grid-connected hydro. CCP status is not stated in the extracted record, leaving an eligibility/quality-label gap for buyers who rely on CCP-type signals.

Documentation

Documentation coverage is relatively strong: the evidence set includes a PDD, monitoring report(s), validation report(s), and issuance records, with 25 documents used and high extraction confidence. Nonetheless, the 2025 monitoring report includes a substantial list of corrective actions (e.g., adding net ER equations, clarifying methodology applicability, and assessing regulatory surplus), indicating that key sections were incomplete or unclear at the time of review. Several material narrative elements also vary across document vintages (safeguards, grievance mechanism, FPIC, crediting period), which is a documentation quality concern even when documents are available.

Overall

Overall quality is moderate: additionality is VVB-confirmed and the latest record shows consistent claimed and verified ERs, but repeated cross-document inconsistencies reduce confidence. For the leakage contradiction, the 2025-05-21 monitoring report’s statement that leakage is negligible is privileged over the 2021-07-29 monitoring report’s ‘not addressed’ because it is more recent and appears to reflect an updated assessment; the inconsistency still warrants a score penalty. For safeguards/grievance and FPIC contradictions, the 2025-05-21 monitoring report is privileged as the latest, but the fact that earlier monitoring reports alternately claim these were absent/present suggests unstable disclosure and increases reputational risk. For the ER contradiction (25,064 vs 58,070) between validation reports, the 2025-05-29 value is privileged as the most recent, but the discrepancy is significant and materially increases over-crediting/claims risk until reconciled. For the crediting period contradiction, the 2019-2029 period in the 2025 monitoring report is privileged as the current crediting period, while the older 2009-2019 period likely reflects an earlier phase; the lack of a clear transition narrative reduces reliability.