Hydro installation on rio Costa Brusada

New installation in the municipality of Borca di Cadore
Owner/client Dolomiti Derivazioni s.r.l.
Type of service Preliminary Design for Application for Grant; Environmental Impact Assessment
Location Borca di Cadore
Period 2011
Cost € 3.511.000

The design, which together with the environmental prefeasibility study is attached to the application for water diversion for hydroelectric use, defines a run-of-river installation for using the resources of the Rio Costa Brusada.

The 'drop' intake structure, located at 1319.61 m above sea level (approx. 1.40 km upstream of the confluence with the Rio Orsolina, of which the Rio Costa Brusada is a right feeder), consists of a fixed weir featuring a diversion channel fed by a sub-horizontal intake grid. The channel, which develops on the left bank, conveys water to the sand trap from where it gets into the load tank. This is where the steel pressure pipe (DN500) originates, which develops underground over a length of approx. 2160 m, on the left bank as far as the bridge 'della Madonna' and, on the right bank (first of the Rio Costa Brusada and then, after the confluence, of the Rio Orsolina), downstream of the same.

The water so diverted shall be used in the turbine power plant (equipped with a horizontal axis Pelton turbine) located on the right bank of the Rio Orsolina, upstream of the bridge serving the link road between the municipalities of Borca di Cadore and Vodo di Cadore. An open return pipe with direct water delivery into the Rio Orsolina shall also be laid here. Architectural design of the power plant by Architect Vincenzo Valentini.

All the works making up the installation are located in the municipality of Borca di Cadore.

Flow rate

Natural flow rate (average value): 0.182 mc/s; Available flow rate (average value): 0.132 mc/s; Available flow rate (maximum value): 0.340 mc/s.

Plant capacity

Nominal capacity (average value): 0.48 MW; Efficient capacity (maximum value): 0.99 MW; Annual production (average value): 3.51 GWh/year.

Other features

Minimum Vital Flow: 42 l/s (stable during year); Average hydraulic head: 369.21 m.