Place

Northern Province - Zambia


Client

LPC Lufubu Power Company Ltd.


Year

2013 - in progress

Description for Lufubu Hydropower Cascade (Zambia)

The Lufubu hydropower cascade includes three plants (Lufubu 1, 2 and 3) which exploit an overall hydraulic head of approximately 315 m developing an installed power of 163 MW, in the first stage, which might be increased in a second stage up to 326 MW.

Lufubu Cascade was created through the synergy of a visionary Zambian entrepreneur and the engineering imagination of SP. The first Independent Power Producer in Zambia asked SP to study the entire Lufubu River in order to identify potentially promising sites for hydropower exploitation.

The entrepreneur chose this area, the least developed in the entire country, given his close sentimental ties to his ancestral birthplace. This adventure led us to the identification of three sites, the design of the plants and the environmental and social impact study of the plants and respective transmission lines.

Lufubu 1 hpp includes a bituminous face rockfill dam (BFRD), 60 m high, which will create a reservoir with a total storage of 720 Mm3. The spillway structure is located on a saddle on the left side of the dam and will be controlled by three radial gates which will discharge Q = 5’170 m3/s (PMF).

The waterway is formed by a headrace canal, 4.4 km long, and a penstock about 2.6 km long which conveys the flows to the turbines.

A surface power house will host a francis turbine with an installed capacity of 66 MW. A second turbine might be installed in a second stage.

Lufubu 2 hpp includes a concrete gravity dam, 21 m high, which creates a reservoir with a total capacity of 85 Mm3. The spillway structure is located in the central part of the dam, controlled by three radial gates, and will discharge a Q = 2’250 m3/s corresponding to a flood with a return period of 10’000 years.

The waterway is similar to that of Lufubu 1, having however an open canal 6.2 km long and a 670 m long penstock which conveys the flows to the turbines.

The installed power will be 44 MW and might be increased in a second stage.

Lufubu 3 is the last plant of the Lufubu cascade. A bituminous face rockfill dam (BFRD), 40 m high, will create a reservoir with a total storage of 400 Mm3. A concrete structure in the dam body will be the spillway, controlled by radial gates and discharging up to 5’170 m3/s (PMF).

Similarly to Lufubu 1 and 2, the waterway will consists of an open canal 7.8 km long and a 2.1 km long penstock.

The Powerhouse will host a Francis turbine with an installed power of 53 MW, that might be increased in the second phase.

Main Features

LUFUBU 1 ( IP = 132 MW )

  • Reservoir ( V_tot = 720 Mm³ )
  • RCC Dam ( H = 60 m, L = 3'650 m )
  • Headrace Canal ( L = 4.4 km )
  • Penstock ( L = 2.6 km, D = 4.2 m )
  • Power house ( Open air type, No. 2 Francis Turbines IP = 2x66 MW )


LUFUBU 2 ( IP = 88 MW )

  • Reservoir ( V_tot = 86 Mm³ )
  • RCC Dam ( H = 22 m, L = 670 m )
  • Headrace canal ( L = 6.2 km )
  • Penstock ( L = 0.67 km, D = 4.2 m )
  • Power house ( Open air type, No. 2 Francis Turbines IP = 2x44 MW )


LUFUBU 3 ( IP = 106 MW )

  • Reservoir ( V_tot = 400 Mm³ )
  • RCC/Rockfill Dam ( H = 40 m, L = 1300 m )
  • Headrace Canal ( L = 7.8 km )
  • Penstock ( L = 2.1 km, D = 4.5 m )
  • Power house ( Open air type, No. 2 Francis Turbines IP = 2x53 MW )
 

Engineering Services

  • Feasibility study
  • Detailed design
  • Environmental and Social Impact Assessment
  • Technical Advisor for IPP
  • Tender documents and assistance to the Client for construction bid
  • Supervision of construction

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Dam Engineering Hydropower engineering