Kenya Power Plants [Commisioned | Operational]

Sondu Miriu Hydro Electric Power Project



Client Konoike-Taisei JV
Supervising Engineer - Nippon Koei
Completion date - October 2007
Project Value - KES 2.2 Billion (US$ 33 Million)

Construction of a 60MW (2 x 30MW) Power Station that involved a run-of-river scheme transferring the water of the Sondu River to Kano Plains through a headrace tunnel, penstock and power station to harness a water head of some 200 metres. Open cut excavation and concrete works for the 3.00m diameter steel penstock line (approximately 1,000m) that leads the water into the power station Construction of reinforced concrete power house building
Construction of switchyard and 11 kV distribution line. Excavation and concrete lining of outlet channel (approximately 4,000m), long with inspection road and drainage structures, that directs water back to the river Construction of the Intake for the hydropower project including remaining river diversion works

Earth works - 460,000m3
Cement stabilized gravel - 40,000m3
Concrete works - 60,000m3
Reinforcement - 2,100 tons
Formwork - 98,000m2
Fencing - 12,500m

Pictures





Infor: hyoung.com

Olkaria II Geothermal Project



Client : Kenya Electricity Generating Company Ltd.
Supervising Engineer: Sinclar Knight Merz (SKM), New Zealand
Completion date: July 2003
Project Value: H Young portion US$ 59. Million

Home >> Markets >> Power Generation >> Olkaria II Geothermal Project
Olkaria II Geothermal Project
Client Kenya Electricity Generating Company Ltd.
Supervising Engineer Sinclar Knight Merz (SKM), New Zealand
Completion date July 2003
Project Value H Young portion US$ 59. Million


Construction of a 64mw (2 X 32) Geothermal Power Station.
The project was undertaken in two contracts.

i) OG101 – Building & Civil works
This was a joint venture between Mitsubishi Heavy Industries, Mitsubishi Corporation and H Young & Co (EA) Ltd for the civil and building works which included among other things, construction of a three storey high power house building, sitting on 1,200 no. piles, 24,000m2 of auxiliary buildings, Staff housing estate and a 560m2 hospital.

Excavation & earthworks works - 170,000m3
Concrete works - 35,000m3
Internal roads - 12 km

ii) OG102 – Electro-Mechanical Installation works
This contract was undertaken simultaneously with the civil and building works. H Young worked as a subcontractor to Mitsubishi Heavy Industries and Mitsubishi Corporation Joint venture who were the main contractor and supplier of the generating turbines.

H Young was responsible to over 80% of the actual site work under this contract.
H Young scope of work included:

• Mechanical installation of the 2 (32MW each) turbines
• Installation of cooling towers
• High pressure steam and other piping works including pipe insulation and cladding
• Electrical installation and building services including HT works, installation of transformers and instrumentation

Pictures

Olkaria III Geothermal Power Project



Client :Ormat Power
Engineer : ORPOWER4 INC. USA
Completion date: 2000
Project Value: US$ 2.85 Million

Construction of a 3 x 4 MW Geothermal Power Station for a private power producer ORMAT Power. H Young undertook the building and civil works including:

Earthworks - 50,000m3
Concrete works - 11,000m3


Mechanical installation of 3 x 4 generating turbines, transformers, cooling towers.
H Young also undertook the installation of more than 6 Kms of high pressure steam and other piping works including the insulation and cladding.
The project took only five and a half months from a green site to power production.

Pictures

Kipevu I Diesel Power Project



Client : Mitsubishi Heavy Industries & Mitsubishi Corporation Joint Venture
Engineer : Mott Ewbank Preece, UK
Completion date: 1999
Project Value : US$ 21.72 Million

Construction of a 60MW (6 x 10MW) diesel power station in Mombasa.
Civil & Building works including 3 storied power station building, heavy duty foundations for the turbines generators and an office building.
Civil works undertaken included:

• Earthworks - 158,000m3
• Concrete works - 15,600m3
• Heavy duty concrete block paving for the access road - 24,000m2
• Other works: Supply and installation of structural steel works including
• Heavy duty Over Head Carnage.
• HDO Tanks (2 X 9,000m3)
• 8 No. tanks with total capacity of 24,000m3 of various media including fire water, raw water, potable water, oil and lubrication oils.
• Sewerage and drainage works also undertaken.

The project highlight was the construction of a 50 metre chimney for flew gases using the slip form technique.

Pictures

MASINGA POWER STATION











A BRIEF DESCRIPTION OF THE PLANT

Written by: Eng. Francis X. Makhanu - Chief Engineer, Masinga Power Station

Introduction

Masinga power station was conceived in 1960’s immediately after the commissioning of Kindaruma power station in 1968. By the time Kamburu power station was being commissioned in 1974, Tana River Development Authority TRDA, under finance provided by the United Kingdom Ministry of Overseas Development commissioned Watermeyer Legge Piesold & Uhlmann (WLPU) consultants to investigate a long term Tana basin development strategy within the content of alternative plans for public water supply, irrigation and hydropower. [[email protected] Proc. Instn Civ.Engrs, Part 1, 76 Nov 999 – 1025].

Full feasibility studies were started in mid 1975 and they confirmed the viability of an upper reservoir for the Seven Forks cascade hydropower complex with a potential of about eleven power plants namely Masinga, Kamburu, Gitaru, Kindaruma, Kiambere, Karura, Mutonga, Low grand Falls, Usheni, Adamsons Falls, and Kora. The first five were developed between 1968 and 1988 while the remaining six are awaiting implementation.

The actual site of the Masinga plant was selected at about 150km from Nairobi via Nairobi – Thika – Kangonde –Embu highway and about 70km from Embu town.

The cost of the plant was about USD172 million (KShs 1.24 billion) and the project took seven years from feasibility studies to construction. The ground breaking for the construction work was done on 2nd March 1978 and commissioning of the plant on 2nd December 1981.

Technical Data

1. Date of commissioning – 2/12/1981
2. Installed capacity – 2 units x 20MW each
3. Manufacturer of Turbines – Escher Wyss (Germany)
4. Manufacturer of Generators – ABB (Asea Brown Boveri)
5. Estimated cost of development – KShs.1.5 billion (USD 172 million)
6. Transmission of power is at 132KV to Kamburu substation and Mt. Kenya
7. Reservoir capacity (F.S.L) – 1560 million cubic metres
8. Surface area of reservoir – 120 sq. km at F.S.L
9. Dam wall height – 60m
10.Dam wall length – 2.2km
11.Length of reservoir – about 45km to Tana bridge
12.Flow rates of the machines – 45.9 cubic metres per second
13.Catchment area –7354 sq.km
14.Maximum generation – 350Gwh/yr
15.Type of machines – Kaplan turbines
16.Design head – 49m
17.Speed – 300RPM

Local Activities Around the Station

Masinga Power plant co-operates with TARDA through bthe Masinga Dam Resort in hosting water sports at the Masinga reservoir (Canoeing & Kayak) every year since year 2006

Provision of free water to the local community at Ngetani market, dispensary and Kathiani Primary school.

Allowing schools and other institutions to visit the plant for educational reasons.

Co-operating with Masinga Dam Resort in encouraging local tourism since the hotel has accommodation facilities.

Liaising with the Seven Forks Environmental Officer in planting trees in the surrounding every year. Seedlings are also offered to neighbours and schools e.g. Kathiani primary school – 1200 seedlings on 20/11/07.

Operating a nursery school for the families of staff and neighbours.

Operating a shop, a butchery, a small social hall and a mini – bar for staff and local community.

Regularly maintaining the 12Km tarmac access road from Kaewa to Masinga power plant.

Bright local pupils and students in the neighborhood have access to company scholarships for secondary and university education.

KenGen has built six water kiosks for the neighbours between Masinga and Kaewa to access water from the National Water Corporation with the help of the Seven Forks Corporate Social responsibility (CSR) committee. The Masinga team provided logistical support in the projects.

Projects in Progress

i) The raising of the Masinga dam wall by 1.5m is in the second phase of study after phase one was completed and approved. This will increase in the storage capacity for the 7-Forks cascade by about 12% and energy in the cascade by about 90 Gigawatt hours per year. [Norplan report of June, 2007]. Expected completion time is 2008 and the estimated cost is USD 12 million.

ii) The plant is very reliable and has generated 4,347,976,000 Kwh at 30/11/2007 with an average availability of 96% over the last 26 years.

http://www.kengen.co.ke/PowerPlant.aspx?PowerPlantId=17

KINDARUMA POWER STATION



Prepared by Eng Elijah Kibathi – chief engineer Kindaruma power station

INTRODUCTION

Kindaruma power station was the 1st major power station in independent Kenya. It was commissioned in 1968. It has two installed vertical Kaplan turbines and a space has been developed for a third unit. Power from Kindaruma is transmitted directly to Nairobi or to Kamburu via a 132KV substation.
Kindaruma is a surface power station and so visitors have the luxury of observing flow of water out of the tailrace. The spillway has three vertical gates and the dam is equipped with an emergency spillway in case of excessively high floods.

The station is situated 170 km north east of Nairobi.

TECHNICAL DATA

1. Installed capacity - 2 x 20MW
2. Turbine manufacturer - BOVING (now GE Hydro)
3. Generator manufacturer - Associated Electric Industries
4. Commissioning date -1968
5. Rated machine flow - 65 cubic metres per second
6. Rated net head - 32m
7. Machine speed - 214.3 rpm
8. Dam type - Rock and earth fill
9. Dam height - 24 metres
10. Dam crest length - 549 metres
11. Reservoir area - 2.4 sq km
12. Reservoir length -5 km
13. Gross storage - 16 million cubic metres (has reduced to 11 million cubic metres due to siltation)


PROJECTS IN PROGRESS

(a)Replacement of the governors for both units

-The two governors have already been manufactured and Factory acceptance test were carried out between 3rd and 14th December 2007. The works to install the new governors is scheduled for mid 2008.

(b)Third unit and rehabilitation of units 1 & 2

- M/S Scott Wilson have been engaged as the consultant for these works. They are presently gathering the necessary information and preparing the tender documents.

LOCAL ACTIVITIES AROUND THE STATION

(a) Provision of free treated water to the local communities at both Kenyatta camp and the station
(b) Regularly maintaining the 14 km tarmac road from the main road junction to the power station.
(c) Erection of shades outside the station and Kenyatta camp to serve staff and local community when they are waiting for transport.
(d) Allowing schools, learning institutions and organized groups to visit the station.







Kindaruma Power Station






















© Johnny Hinzen.

KAMBURU POWER STATION









A BRIEF DESCRIPTION OF THE PLANT
Written by: Reuben M. Wekesa – Assistant Station Engineer, Kamburu Power Station

Introduction

Kamburu power station was the 2nd major power station in independent Kenya after Kindaruma power station. It was commissioned in 1974. It has three installed vertical Francis turbines. The spillway has three radial gates and one flap gate.

Full feasibility studies were started in mid 1960’s and they confirmed the viability of an upper reservoir for the Seven Forks cascade hydropower complex with a potential of about eleven power plants namely Masinga, Kamburu, Gitaru, Kindaruma, Kiambere, Karura, Mutonga, Low grand Falls, Usheni, Adamsons Falls, and Kora. The first five were developed between 1968 and 1988 while the remaining six are awaiting implementation.

The actual site of the Kamburu plant was selected at about 160km from Nairobi via Nairobi – Thika – Kangonde –Embu highway and about 50km from Embu town.

The cost of the plant was about USD 47 million (KShs. 344 million) and the project took seven years from feasibility studies to construction. The ground breaking for the construction work was done on 29th June 1971 and commissioning of the plant on 5th July 1974.

Technical Data

1. Date of commissioning – 5/7/1974
2. Installed capacity – 3 units x 31.4MW each
3. Manufacturer of Turbines – Litostroj (Yugoslavia)
4. Manufacturer of Generators – Rade Koncar (Yugoslavia)
5. Estimated cost of development – KShs.344 million (USD 47 million)
6. Transmission of power is at 132KV to Kindaruma, Gitaru and Masinga substation and Mt. Kenya. 132KV line from the substation to 220KV Substation then to Dandora
7. Reservoir capacity (F.S.L) – 123 million cubic metres
8. Surface area of reservoir – 60 sq. km at F.S.L [1,500 h.a]
9. Dam wall height – 56m
10. Dam wall length – 0.9km
11. Length of reservoir – 45.0 cubic metres per second
12. Catchment area – 7354 sq.km
13. Maximum generation – 467Gwh/yr
14. Type of machines – Francis turbines
15. Design head – 71m
16. Speed – 273RPM

Local Activities Around the Station

• Provision of free water to the surrounding communities. There is a tap at the main gate where the local access clean treated water.

• Allowing schools and other institutions to visit the plant for educational reasons.

• Liaising with the Seven Forks Environmental Officer in planting trees in the surrounding every year. Seedlings are also offered to neighbors and schools e.g. Machang’a primary and secondary schools.

• Operating a shop, a butchery, a small social hall and a mini – bar for staff and local community.

• Regularly maintaining the 15Km tarmac access road from Machang’a to Kyaani.

• Bright local pupils and students in the neighborhood have access to company scholarships for secondary and university education.

Projects in Progress

The spillway remedial works is substantially complete by Heavy Engineering Company. The three gates No. 1, 2 and 3 are back to normal operations. Access footpath was resurfaced and installation of joints sealants completed. Out standing work is installation of stop logs and lifting beam guide shoes. The shoes have been fabricated and delivered on site for final installation. The estimated cost is Kshs. 30 million.

The plant is very reliable and has generated 12,464,648,314 Kwh at 30/11/2007 with an average availability of 96% over the last 33 years.

http://www.kengen.co.ke/PowerPlant.aspx?PowerPlantId=17

This thread is old bt i enjoyed reading it. Nice work

why is this thread in the safari lounge? probably get more posts if it were moved.:smug:

èđđeůx;79642672 said:

why is this thread in the safari lounge? probably get more posts if it were moved.:smug:

Click to expand...

Bet it needs to go to Infrastructures section. Lots of other projects belong here.

Dhuks said:

This thread is old bt i enjoyed reading it. Nice work

Click to expand...

Your Welcome.

How did i miss this thread?Great work KN.

How did the nuclear energy production go?I have not heard anything lately!

Just another promise?:lol:

Sorry for the thread mixup guys, I dunno what happened! But with help and two tries, it's where it originally was supposed to be. Keep the thread going! :cheers:

Xusein said:

Sorry for the thread mixup guys, I dunno what happened! But with help and two tries, it's where it originally was supposed to be. Keep the thread going! :cheers:

Click to expand...

thanx xusein.

kisumundogo you seem to be informed on these power stations, is it possible to send us renders on kiambere power station. fact that generation is done below ground really mesmerised me about it. Any photos?

Does anyone have any information on the said mega dam to be built in Tharaka Nithi county?

Xusein said:

Sorry for the thread mixup guys, I dunno what happened! But with help and two tries, it's where it originally was supposed to be. Keep the thread going! :cheers:

Click to expand...

yeah thanks for the fix!

mwenzetu said:

Does anyone have any information on the said mega dam to be built in Tharaka Nithi county?

Click to expand...

i didnt know there was a mega dam planned there.i know there is a small dam serving the community.

the little information i have about diz project is that its supposed to be carried out by chiness guys n it shld be starting soon