February 18, 2014


                                  TANZANIA ELECTRIC SUPPLY COMPANY LIMITED



Expression of Interest

Tanzania Electric Supply Company Limited (TANESCO) intends to carry out a study to establish the extent of siltation/sedimentation in both Mtera reservoir and Lower Kihansi pond.  Lower Kihansi hydro power Plant was commissioned in late 1999 on the Kihansi River Falls, a tributary of the Kilombero River. The hydro plant, located in the Eastern arc mountain forests of Udzungwa, utilises a head of 850m with an installed capacity of 180 MW. It has a pond with a surface area of 0.26 km2 and a live capacity of 1 Mm3.

Mtera hydropower plant has an installed capacity of 80 MW and a reservoir with a surface area of 605km2 and a live storage capacity of 3200 Mm3. The reservoir was constructed during phase II of the Great Ruaha Power Project between 1977 and 1981, the purpose being to supply the 200MW Kidatu Hydro power plant with sufficient volume of water during dry season and also to give an over year storage capacity to cover for extremely dry years or series of dry years.

Objective of the assignment

This consultancy service is aimed at ensuring continuous flow of water through rivers feeding Kihansi and Mtera reservoirs for sustainable power generation from both plants that contributes 260MW to the national grid and regulates Kidatu Hydropower plant on the downstream. The objective of this consultancy is to carry out a study to establish the extent of siltation/sedimentation in both Mtera reservoir and Kihansi pond.

The proposed investigations should therefore include:

i)                    Establishment of sediment loads (in and out of the Mtera/Kihansi pond) through field
ii)                  Estimating the Mtera reservoir and Kihansi pond sedimentation rate, and;
iii)                Estimating the remaining economic life of the reservoir and pond

Scope of Service

The scope of the consulting services in respect of the project is:

·         Compilation and review of existing data/information such as design reservoir bed topography or elevation-capacity/area curves or as part of the desk search activities. Other information shall include general information on the dam, reservoir, and drainage basin; information on all past surveys at the reservoir; a graph showing the reservoir stage fluctuation or stage duration curve; profiles of all reservoir and original bed profile and plots of selected prior surveys, and; any data on sediment inflow and outflow which may be available for estimating trap efficiency, sediment load (in and out of the reservoir/pond),
·         Fieldwork to survey reservoir using modern techniques for precise measurements, using relevant survey equipment,
·         Collecting reservoir bed core samples for bulky density, Particle Size Distribution (PSD) and organic matter content determination,
·         Carry out laboratory analysis of collected data to determine sediment deposition bulk density, organic matter content and suspended sediment concentration

The Tanzania Electric Supply Company Limited (TANESCO) now invites eligible qualified consultants to express their interest in participating and submitting the Expression of Interest (EoI)   as elaborated in the scope of the services above. 

Eligible Interested Consultants must provide information indicating that they are qualified to participate in providing the services (brochures, description of similar assignments in the past three (3) years, description of experience in similar conditions, availability of appropriate skills amongst staff with their CV’s and certificates of registration with relevant professional boards). Consultants may associate to enhance their qualifications.

The Consulting firm will be selected in accordance with procedures set out in Public Procurement Act 2011, Regulations 2013 for Employment and Selection of Consultants Guidelines G.N. 446.

Firms are therefore encouraged to team up to enhance their skill to meet this requirement.

Eligible Interested Consultants may obtain further information at the address below from 09.00 – 12.30 hours and 14.00 – 16.30 hours local time (Monday to Friday) exclusive of public holidays:

Secretary, Tender Board, TANESCO Head Office-Umeme Park Building, Ubungo-Morogoro Road, Third Floor, Room No. 305A, P.O. Box   9024, Dar Es Salaam, Tanzania. Tel: 255 (22) 2451145/2452172; Fax: 255 (22) 2451145/2452172; Email: sec.tenderboard@tanesco.co.tz 

All bids must be addressed to the Secretary, TANESCO Tender Board, TANESCO Head Office-Umeme Park Building, Ubungo-Morogoro Road, Ground Floor, Room G.15, P.O. Box 9024, Dar Es Salaam, Tanzania not later than  14th March, 2014 at 14:30hrs (local time). The envelope shall be clearly marked “TENDER  NO. PA/001/14/HQ/C/02 FOR EXPRESSION OF INTEREST FOR PROVISION OF  CONSULTANCY SERVICES FOR SEDIMENT MAPPING AT MTERA AND KIHANSI RESERVOIRS)”.

No proposals are required to be submitted at this stage. On the basis of obtained information from eligible interested consultants, TANESCO will prepare a shortlist of Consultants who will be invited through a Letter of Invitation including detailed Terms of Reference (TOR) to submit Request for Proposals (RFP).

Place, Date and Time of Opening
The Documents for Expression of Interest submitted to the above address shall be opened in public at TANESCO Twiga Board Room immediately after 14.30 hours local time on 14th March, 2014.

Late submission of the documents, portion of documents, electronic documents, and documents not received, documents not opened at the opening ceremony shall not be accepted for evaluation irrespective of the circumstances.


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