Qualla: Paulo Afonso Hydroelectric Complex

Paulo Afonso Hydroelectric Complex: Introduction

Fri, 04 Sep 2026 00:00:00 GMT

Photo credit Jpsantos1980, CC BY 4.0. For most of the year the waterfall is not there. Stand at the lip of the gorge at Paulo Afonso in a normal dry season and you are looking at bare rock and no water to speak of. Then, in a wet year, the operators open four controlled spillways set into the face of the falls, the São Francisco comes over the edge again, and for as long as the gates stay up the cataract is exactly what it always was. This is the deal the Brazilian Northeast made in the twentieth century: the most spectacular natural feature in the region, traded for the electricity that lit it.

Image: Jpsantos1980 | CC BY 4.0

Paulo Afonso Hydroelectric Complex: What Was Here

Fri, 04 Sep 2026 00:00:00 GMT

Photo credit MTur Destinos, Public domain. The Paulo Afonso Falls were not a single sheet of water but a staircase — a series of tiered cascades dropping around 80 metres in total, the longest single plunge close to 59 metres, funnelling into a gorge that narrows to an average of about 18 metres across. Before the dams, t...

Image: MTur Destinos | Public domain

Paulo Afonso Hydroelectric Complex: Fifteen Hundred Horsepower

Fri, 04 Sep 2026 00:00:00 GMT

Photo credit Axelmarques, CC BY-SA 3.0. The first person to take power out of the falls was not a state agency but a merchant from Ceará. Delmiro Augusto da Cruz Gouveia, born at Ipu on 5 June 1863, built the small Angiquinho plant at the foot of the cataract and brought it online in January 1913 — 1,500 horsepower, an...

Image: Axelmarques | CC BY-SA 3.0

Paulo Afonso Hydroelectric Complex: Digging Under the River

Fri, 04 Sep 2026 00:00:00 GMT

Photo credit Mkossick, CC BY-SA 3.0. Brazil's Ministry of Agriculture had recognised by the 1940s that harnessing the São Francisco was the lever for developing the semi-arid Northeast. Paulo Afonso I was authorised on 23 May 1944 with two generators, and the Companhia Hidro-Elétrica do São Francisco — CHESF — was c...

Image: Mkossick | CC BY-SA 3.0

Paulo Afonso Hydroelectric Complex: Thirty Years of Concrete

Fri, 04 Sep 2026 00:00:00 GMT

Photo credit Public domain. Nobody stopped. Paulo Afonso II came on line between 1961 and 1967, six generators in a longer cavern alongside the first, totalling 443 megawatts. Paulo Afonso III followed from 1967 to 1974, four Siemens machines of 198.55 megawatts each. In 1971 work shifted four kilometres up...

Image: Public domain

Paulo Afonso Hydroelectric Complex: The Ledger

Fri, 04 Sep 2026 00:00:00 GMT

Photo credit MTur Destinos, Public domain. The gains were real. Electricity from these caverns underwrote the industrialisation of the Northeast, and the town that grew around the works became the city of Paulo Afonso in 1958, home to about 113,000 people at the 2022 census. The costs were also real. Building the dams to...

Image: MTur Destinos | Public domain