Sun Koshi No.3
- Page status
- Working page
- Updated
- 2026-05-13
Summary
Sun Koshi No.3 is a 536 MW Koshi basin storage candidate with large reservoir volume and a 2031-2035 planning-window placement in the current IPSDP milestone layer.
Sun Koshi No.3 is a 536 MW JICA promising-storage candidate in the Koshi basin. It is pinned in Layer: Storage Shortlist because it combines large reservoir scale with meaningful dry-season output in Nepal's eastern-central hydro corridor.
Specifications
| Parameter | Value |
|---|---|
| Capacity | 536 MW |
| Status | Survey / study |
| Category | jica promising storage |
| Basin | Koshi (Koshi Basin) |
| Annual energy | 1883.6 GWh |
| Dry-season energy | 335.9 GWh |
| Dry share | 17.8% |
| Total storage | 1220.0 MCM |
| Effective storage | 555.0 MCM |
Storage
| Parameter | Value |
|---|---|
| Total storage | 1220.0 MCM |
| Effective storage | 555.0 MCM |
Output
| Parameter | Value |
|---|---|
| Annual design energy | 1883.6 GWh |
| Dry-season energy | 335.9 GWh |
| Dry-season share | 17.8 % |
| Type | Storage |
Sources
Why It Matters
Sun Koshi No.3 has 1,220 MCM total storage, 555 MCM effective storage, and 335.9 GWh of dry-season energy in the storage-shortlist table. Its dry share, 17.8%, is lower than Nalsyau Gad, Dudhkoshi, or Kokhajor-1, so the case for the project rests more on total reservoir block and basin position than on dry-share efficiency.
This makes it a useful comparator for Dudhkoshi Storage Hydroelectric Project. Both are Koshi-basin storage candidates, but they occupy different strategic roles: Dudhkoshi is the stronger quantified dry-season block, while Sun Koshi No.3 is a large east-central storage option with different location and transmission implications.
Status And Timing
Sun Koshi No.3 is a planning candidate, not an active construction project in the current wiki evidence set. The IPSDP milestone ladder groups Sunkoshi 3 STO in the 2031-2035 window.
Watch for updated feasibility, developer structure, environmental approvals, financing, and how the project is treated in relation to downstream river regulation and cross-border hydrology concerns.
Map Interpretation
The current map marker is a river anchor. Use it for basin and strategic comparison, not for final dam-axis or reservoir-boundary analysis.
Limitations & Controversies
The page treats Sun Koshi No.3 as a planning candidate and does not confirm updated feasibility design, developer structure, financing, environmental approvals, dam-axis coordinates, or reservoir-boundary impacts.
Registry note
- JICA/NEA storage master plan volume 2