Drop 4
Drop 4 is a 20 MW hydroelectric power plant in Imperial County, California, operated by Imperial Irrigation District. EIA-860M lists 2 generating units here. Its units entered service between 1941 and 1950.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Nameplate capacity
- 19.6 MW
- 20 MW net summer
- Generating units
- 2
- In service
- 1941–1950
- EIA plant ID
- 387
Where it is
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- County
- Imperial County, California
- Coordinates
- 32.7053, -115.2191
- Balancing authority
- IID
- Sector
- Electric Utility
Units, technology and status
- Operator of record
- Imperial Irrigation District
- Primary energy source
- Hydro
- Technologies
- Conventional Hydroelectric
- Status
- Operating
Drop 4: FAQ
- Where is Drop 4?
- In Imperial County, California (CA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
- How big is Drop 4?
- 20 MW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.
- Who owns Drop 4?
- EIA-860M names Imperial Irrigation District as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
- Is this the same as Drop 4 LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Imperial Irrigation District here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Drop 4 LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Drop 4 still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.