Pico da Urze, high on Paul da Serra, is by far the largest dam reservoir in Madeira, storing just over one million cubic metres of water. Madeira does not have the huge valley reservoirs found on mainland Portugal; instead, its principal water stores are compact, high-altitude and closely linked to the island’s levadas, farming and electricity network. In this updated guide: discover the largest dams and reservoirs in Madeira ranked by published capacity, understand what the water is used for, and learn which areas can be appreciated from public roads or nearby walks without entering operational infrastructure.
Pico da Urze: Madeira’s largest reservoir by a wide margin
The Barragem do Pico da Urze is Madeira’s standout modern reservoir. It lies on the Paul da Serra plateau, in the municipality of Calheta, at around 1,350 metres above sea level. Its total published capacity is 1,014,148 cubic metres, with 862,806 cubic metres described as useful storage capacity in the current legal framework for the Calheta hydroelectric scheme.
This is not simply a lake created for scenery. Pico da Urze is the upper store in the reversible Calheta III hydroelectric system: water can be used to generate electricity downhill and pumped back uphill when there is surplus renewable energy available. In practical terms, it helps Madeira make better use of wind and solar generation while also providing strategic water storage for public supply, irrigation and energy production.
The reservoir is fed by the Ribeira do Alecrim and the Levada Velha do Paul. Its dam crest is approximately 620 metres long, although visitors should not expect a promenade, café or formal visitor centre. This is working infrastructure in an exposed upland landscape, where cloud, wind and sudden rain are common.
The principal reservoirs ranked by published capacity
There is no simple visitor-facing league table covering every private agricultural tank and small levada storage basin on Madeira. The ranking below compares the principal named, engineered water stores for which published capacity figures are available. It also includes operational chambers that are important within the Calheta hydroelectric network, even though they are not all dams in the conventional sense.
| Rank | Reservoir or dam | Location | Published total capacity | Main role | Visitor reality |
|---|---|---|---|---|---|
| 1 | Barragem do Pico da Urze | Paul da Serra, Calheta | 1,014,148 m³ | Hydropower, pumped storage, public supply and irrigation | Seen in the Paul da Serra uplands; operational area |
| 2 | Barragem da Portela | Santo António da Serra, Machico | About 87,800 m³ | Improving the irrigation network in Machico | Not a developed tourist attraction |
| 3 | Coruchéu restitution reservoir | Calheta hydroelectric system | 68,540 m³ | Lower-level water return and energy-system operation | Infrastructure rather than a sightseeing stop |
| 4 | Lombo do Salão loading chamber | Calheta | 20,000 m³ | Hydroelectric water management | Do not enter service areas |
| 5 | Paul da Serra accumulation chamber | Paul da Serra, Calheta | 13,700 m³ | Water storage within the Calheta system | Best understood as part of the wider levada landscape |
The second-largest purpose-built reservoir in this comparison is the Barragem da Portela, in the parish of Santo António da Serra, Machico. It stores around 87,800 cubic metres and was constructed to improve the municipality’s irrigation network. It should not be confused with the better-known Portela Viewpoint between Machico and Porto da Cruz, which is valued for its wide coastal panorama rather than for views of the dam.
Why reservoirs matter on an island of levadas
Madeira’s water management system is shaped by steep terrain and striking contrasts in rainfall. The wetter north and high plateaux collect water that can be channelled towards agricultural land and population centres elsewhere on the island. Levadas are the historic and still essential part of that story: they capture, transfer and distribute water across slopes that would otherwise be difficult to irrigate.
The Calheta hydroelectric scheme brings together old and newer elements: levadas and tunnels carry water, chambers regulate it, and power stations convert its downhill movement into electricity. The 2026 legal framework recognises both electricity producer EEM and water utility ARM as principal users, covering hydroelectric production, public water supply and irrigation.
This helps explain why a reservoir level can change noticeably and why these are not recreational lakes. Water is being managed for essential services, ecological flows and energy balancing. At Pico da Urze, the operating rules also require a minimum reserve for daily reversible hydroelectric operation, alongside monitoring of inflows, water levels and downstream ecological flows.
For a broader introduction to this remarkable network, see our guide to how many levadas Madeira has, their total length and how they work.
Where you can see dam landscapes safely
The most practical place to understand Madeira’s largest reservoir landscape is Paul da Serra. Drive the ER110 only when conditions are good: this high plateau can be foggy, windy and very different from the weather in Funchal or Calheta. The reservoir itself is not promoted as a conventional attraction, but the open plateau, moorland and water-management structures add another layer to a scenic cross-island drive.
Combine the area with Rabaçal rather than treating the dam as a stand-alone day out. The official PR 6 and PR 6.1 routes begin from the ER110 and descend towards the 25 Fontes and Risco areas; these routes reveal the natural water sources that feed Madeira’s levada culture, although they do not provide authorised access to the Pico da Urze dam works. Always check the official trail-status notices before setting out, as route conditions and circulation arrangements can change.
The Portela dam is more relevant to travellers exploring the eastern uplands around Santo António da Serra and Machico. However, it is an irrigation project, not a lakefront destination. The nearby Portela Viewpoint is a far better choice for wide views towards the north and east coasts. For driving guidance in these changeable mountain conditions, read Driving Madeira’s Mountain Roads: Steep Routes, Fog, Parking and Safe Alternatives.
Access limits: admire the system, not the fenced infrastructure
Madeira’s dams, reservoirs, loading chambers, pumping stations and water channels are vital operational assets. They may have restricted gates, service traffic, steep embankments, deep water, slippery concrete and changing water levels. A public road passing nearby does not mean that the dam crest, reservoir edge or technical buildings are open to visitors.
At Pico da Urze especially, respect all signs, barriers and staff instructions. Do not climb fences, walk along channels or attempt to reach the water’s edge through private or service tracks. There are no published visitor tours or regular public opening hours for these installations, so plan your day around public roads, official viewpoints and marked trails instead.
- Use Paul da Serra for the landscape: Treat Pico da Urze as part of a wider plateau drive, not as a conventional reservoir visit.
- Check trail status on the day: Official PR routes can close or operate with one-way arrangements after poor weather or maintenance.
- Do not rely on sat-nav alone: It may direct you onto forestry or service roads that are unsuitable, restricted or difficult to turn around on.
- Expect fast weather changes: Carry a waterproof layer and allow extra time when crossing the ER110 plateau.
- Keep clear of levada infrastructure: Channels, intakes and chambers are working water assets, not safe shortcuts or swimming places.
- Choose viewpoints for photographs: For dramatic mountain panoramas, Madeira’s high viewpoints are generally more rewarding than dam access roads.
Frequently asked questions
What is the largest dam in Madeira?
Pico da Urze on Paul da Serra is Madeira’s largest dam reservoir by published storage capacity, holding just over one million cubic metres of water.
Can you visit Pico da Urze reservoir?
You can appreciate the surrounding Paul da Serra landscape from public roads and authorised routes, but the dam and its associated technical infrastructure are operational facilities rather than a formal visitor attraction.
Are Madeira’s reservoirs used for drinking water?
Yes. The Calheta system is managed for several public purposes, including hydroelectric generation, irrigation and public water supply, depending on the infrastructure and operational needs.
Can you swim or kayak in Madeira’s dam reservoirs?
Do not assume that water recreation is allowed. These reservoirs are working infrastructure with safety restrictions, variable levels and no established tourist facilities for swimming or boating.
Facts and capacities verified in September 2026. For more practical context, explore our guides to Madeira’s highest viewpoints, Madeira’s official PR hiking trails and the wider Hiking & Levadas category.
