Juquiá hydroelectric complex
The Juquiá complex, in the south of São Paulo State, brings together seven hydroelectric plants belonging to an energy producer: six dams in cascade on the Juquiá-Guaçu river, França, Fumaça, Barra, Porto Raso, Alecrim and Serraria, and Salto do Iporanga on the Assungui river, with crests of 140 to 265 m and heights of 15 to 45 m. The contract signed in July 2026 covers the detailed survey of the faces and crests of all seven structures, then a follow-up survey. From 17 to 21 August we flew over the seven dams and surveyed Salto do Iporanga in detail; from 5 to 8 October, the faces of Serraria, until the opening of the spillway gates interrupted the mission. The rest is scheduled for the 2027 dry season.
Key facts
| Structures | Six dams on the Juquiá-Guaçu river (França, Fumaça, Barra, Porto Raso, Alecrim, Serraria) and Salto do Iporanga on the Assungui river |
|---|---|
| Dimensions | Crests from 140 to 265 m, heights from 15 to 45 m |
| Capacity | From 24 MW (Serraria) to 72 MW (Alecrim) per plant |
| Contract | Signed in July 2026: detailed survey of the upstream and downstream faces and crests, anomaly mapping, 3D models, web tool, then a follow-up survey |
| Missions | 17–21 August 2026: seven dams in general views, Salto do Iporanga in detail; 5–8 October 2026: Serraria |
| Method | GNSS base on the crest benchmarks set during the operator’s 2021 surveys, close automatic flights and manual complements |
| Missions listed | 3 |
On the map
3 missions at this location
Second mission at the Juquiá complex: faces of Serraria
From 5 to 8 October 2026: upstream face of Serraria on the 6th in the rain, with nine flight plans, downstream face on the 7th with seventeen flight plans; on the 8th the automatic spillway gates were open and the downstream face under water, so the upstream face was flown again and the mission stopped. The rest of the campaign is postponed to the 2027 dry season; the three Salto do Iporanga orthophotos have been produced.
Read the articleFirst mission on the seven dams of the Juquiá complex
From 17 to 21 August 2026: general aerial views of the seven plants, França, Fumaça, Barra and Porto Raso on the 17th, Salto do Iporanga on the 18th, Serraria on the 19th, Alecrim on the 20th, and detailed acquisition of Salto do Iporanga, upstream face on the 19th and downstream face on the 21st, GNSS base on the operator’s crest benchmarks; reconnaissance report delivered on 1 September.
- 7 dams visited
Two-year contract for the seven dams of the Juquiá complex
Technical proposal validated in April, contract signed in July 2026: detailed survey of the faces and crests of seven dams with crests of 140 to 265 m, six on the Juquiá-Guaçu river and Salto do Iporanga on the Assungui river, anomaly mapping, 3D models and web tool, then a follow-up survey.
Read the article
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97310 Kourou
French Guiana
Route des Trois-Îlets
97229 Les Trois-Îlets
Martinique
20030-041 Rio de Janeiro – RJ
Brazil