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The Sondu/Miriu Hydropower Project (SMHPP) is located close to the shore of Lake Victoria, approximately 50Km. from the city of Kisumu and around 300 km. North West of Nairobi on the Nyakach Escarpment.
SMHPP when completed at end of 2007/early 2008 will have a maximum output of 60 megawatts from two units and an average annual energy production of 330GWh. A substantial proportion of the SMHPP has been funded by two loans from the Japan Bank for International Cooperation (JBIC).
Unlike other hydropower projects in Kenya, SMHPP does not have a major dam and associated reservoir but relies on the river flow with only a small storage capacity at the intake. Water is diverted to the power station through a 6.2km long tunnel that takes the water to the face of the Nyakach escarpment. A surface mounted penstock connects into the tunnel and takes the water down the escarpment, a fall of approximately 200m, to the surface power station below. The water is then returned to the original river approximately 13km downstream of the intake by a 4.7km long outlet channel. A new transmission line of about 50km long has been constructed under the SMHPP to connect the power station with the Kisumu Substation.
The construction works of the Lot I-1 Civil Works for the Intake and Tunnel were commenced in March 1999 and completed in August 2003. The outstanding contracts for the civil works for the steel penstock pipe line, power station and outlet channel, hydromechanical works, generating equipment and transmission line works commenced in October 2004 and will be completed at the end of 2007/early 2008.
The construction works for Lot I-1 Schools and Church under local funding were completed in February 2000.
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| (a) |
Catchment area |
3,345 km2 |
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Annual mean runoff |
41.0 m3/sec |
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| (b) |
Intake water level (FSL) |
EL. 1,402.5 m |
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Tailwater level |
EL. 1,205.6 m |
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Gross head |
196.9 m |
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Net head |
178.6 m |
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Maximum output |
60MW (30 MW x 2 units)
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Average energy production |
330.6 GWh per year |
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| Intake facility |
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| (a) |
Intake weir
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Gated concrete weir of gravity type |
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Weir sill
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EL. 1,392.0 m |
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Dimensions
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70m in width and 18m in height
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Intake weir gate |
Three 15m wide and 10.6 high fixed wheel.
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| (b) |
Sand flushing bay |
10m wide open channel type. |
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Sand flushing gate |
One 10m wide and 13.5m high fixed wheel.
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| (c) |
Inlet |
Horizontal side intake type having 26m in width |
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Inlet gate |
Four 5.0m wide and 7.6m high fixed wheel gates |
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Trashrack |
Four 5.0m wide and 9.0 high inclined trashracks.
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| (d) |
Settling basin |
Two 12.0m wide and 44m long open channels |
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Sand drain gate and valve |
One 1.5m wide and 1.5m high sand drain gate and
two 1.5m wide and 1.5m high sand drain valves.
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| (e) |
Intake |
Vertical type. |
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Gate |
One 5.0m wide and 7.6m long |
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Trashrack
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Two 5.0m wide and 9.0m high inclined trashracks.
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| Waterway |
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Headrace tunnel |
Circular reinforced concrete lined 4.2m diameter |
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Length |
6,194m |
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| (b) |
Surge tank
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Restricted orifice type, 14.0m diameter and 36.8m high |
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| (c) |
Penstock |
Surface steel pipe
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Length |
1,214m |
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| Power station |
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Powerhouse |
Surface reinforced concrete building 24.5m by 40.0m by 32.2m in height.
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| (b) |
Switchyard |
Outdoor type 59.0m by 122.5m |
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| (c) |
Tailrace |
Open channel 28.0m wide by 46.8m long
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Outlet channel
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4,715m long lined open channel trapezoidal shape
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| Generating equipment |
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Turbine
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Two 31,200kW vertical shaft Francis units |
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Generator |
Two 33,700kVA output capacity vertical units |
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Main transformer |
Two 33,700kVA capacity units of three-phase, outdoor, forced aircooled and 11 kV to 132kV voltage |
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Switchgear |
132kV outdoor, and 11.0kV indoor switchgear. |
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| Transmission line |
132kV single circuit 49km long to Kisumu Substation. |
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PERIOD OF DCI SERVICES:
2004 to 2008
DCI SCOPE:
General Construction Stage Services including:-
- General commercial and contractual support to the Project Manager and Project Team.
- Preparing particular Project Procedures, covering office and project management, contractual/commercial management and project administration. DCI Standard Procedures have been adopted as a basis for these Project Procedures.
General Management of Project Commercial and Financial Affairs with assistance of local staff, including:
- Providing monthly measurement of works in progress.
- Preparation and agreement of monthly payment valuations and issue of interim payment certificates.
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Preparation of coordinated works and overall project cost forecasts and cost reports and estimates.
- Identifying, issuing, measurement and pricing of Engineer's Instructions/ Variation Orders and agreement of same with the Contractor.
- Re-measuring the Works and preparation of the final account, including pricing and agreeing final account totals with Contractor.
Project Progress Monitoring and Support Services, including:
- Preparation of physical and financial progress reports for each Works Package.
- Preparation of physical and financial progress reports for the entire Project.
- Defining responsibilities, managing and coordinating records of work inputs from Contractor and respective engineers and identifying and analysing potential problem areas.
- Project team coordination, ensuring that the project team members understand responsibilities and take consistent and timely action.
Contract Control Services, (working very closely with the project manager and team) including :-
- Preparing and or reviewing all outgoing commercial, administrative and commercial correspondence.
- Reviewing all incoming contractual correspondence.
- Advising of contractual effect and significance.
- Suggesting suitable solutions and methods of action and response.
- Identifying and analysing potential problems, disputes and delays and trying to solve these before claims develop (see above input on Progress Monitoring).
- Reviewing contractual claims e.g. for delays, disruption or for extension of time and associated costs.
- Advising on status/legal basis of claims, recommending and then implementing appropriate measures.
- Preparing contractual and commercial reports.
- Supporting in negotiation and agreement.
- Assistance in arranging for arbitration or litigation services.
- Project coordination, ensuring that the project team members take consistent and timely action.
Project Completion activities including the management, control and coordination of:
- Punchlisting including defining and managing inputs of the Engineer, Contractor and Employer and regular monitoring and reporting.
- Coordination and control of as-built drawings, O & M Manuals, spare parts, tools, etc.
- Review of staff training arrangements.
- Review of final document arrangements.
- Preparation of final reports.
- Preparation of completion certificates, defects liability certificates, warranties, bonds and insurances.
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Preparation of final payment certificates, releases of retention etc.
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