Publish Date: Mar 06, 2019

Closing Date: Mar 27, 2019

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Islamic Republic of Afghanistan

Irrigation Restoration and Development Project (IRDP)

Loan No./Credit No./Grant No.: IDA-H6810

Assignment Title: Geophysical Investigation for Darunta Dam     Date:25-Feb-2019

Reference No. (as per Procurement Plan): MEW/PCU/REOI/C-961

The Islamic Republic of Afghanistan/MINISTRY OF ENERGY AND WATER has received financing from the World Bank toward the cost of the Irrigation Restoration and Development Project (IRDP), and intends to apply part of the proceeds for consulting services for Geophysical Investigation for Darunta Dam.

1. Statement of Requirement 

Darunta Dam is constructed on Kabul River approximately 15 Km north of the city of Jalalabad. Approximate coordinates of the dam axis are 34° 29' 06 " N and 70° 21' 49" E.  Height of the dam is about 22 m.

The dam crest is approximately 8 meters wide and is concrete paved and is used a functional road link across the river. Upstream face of the dam pitched with stone and cement and downstream face is stone pitched a stone pitched wall, topped by a wide concrete capping. The Dam has a number of gated spillways. The dam has two spillways one each on both sides of the Embankment dam. A schematic diagram of the dam showing two spillways, top road and mid level bench on the downstream face is attached for reference.

Currently some seepage is apprehended in the dam body as some water is entering into the dam along the contact between the concrete wall of spillway and the embankment dam as highlighted on the sketch with arrow mark. The survey is aimed to detect the seepage path and its effect on the rock fill material beneath and possible piping or cracking.

2. Scope of Work and Technical Specifications

Primary objective of the work is to conduct geophysical surveys to identify:

  • Identify the embankment materials.
  • Identify internal erosion/ leakage in the dam.
  • Identify any Cracks in the dam body.
  • Identify various layers of dam.
  • Identify the foundation condition and depth to bed rock and type of bed rock.
  • Show 3D Model of Darunta Dam.
  • Interpret the results in a format that will facilitate design of the grouting measures which should stop the leakage.

The geophysical surveys should include resistivity imaging/ resistivity surveys, suitable for a rockfill dam with clay screen.

Possible methods to be applied for the investigations include:

  • Ground penetrating radar;
  • 3D electrical resistivity imaging;
  • Streaming potential;

Seismic (NDT)

It is Client’s requirement that the testing method used is of a non-destructive nature (NDT), given the state of the embankment.

However, the bidder can choose a method or combination of methods, in which case it will be limited maximum to three methods, to achieve the above objective.

Two lines A-A’ and B-B’ are anticipated on road above dam and mid level bench respectively as shown in the enclosed sketch.

Finally, the investigations will be done in two phases:

  • Immediately, showing the profile and seepage at present; and
  • After the grouting works, showing the impact of the seepage treatment.

3. Consultant’s Requirement

The bidder will submit detail of method or methods (limited to maximum three methods) that it proposes to be use in achieving the above objective. The agency will also submit limitations it foresees in application of the methods. However, selected methods should be able to provide information as mentioned the scope of work.

4. The Bidder

The selected bidder should have an adequate knowledge of geophysical methods and past experience in undertaking geophysical surveys and works of above. Information in this regard will be provided by the bidder. The bidder will provide statement with similar work experience and CVs of the key technical staff.

5. Reports’ Submittal

The bidder will submit two reports: an interim report after one month from the beginning of the works, showing the state of the dam and seepage at present as well as a final report at end of the assignment. The latter will be done after the grouting works.

It is estimated that the grouting works will take four months, so the time period between the two geophysical investigations will be maximum six months.

The reports amongst other things should incorporate the following:

  1. Layout of profile or profiles of each method and on each of the profiles (which are maximum 100m in length);
  2. Summary of results in respect of above findings, describing:
  1. Leak path/s detection;
  2. Internal erosion, if any;
  3. Identification of zones of water accumulation, if any;
  4. Cavities/sinkholes, if any;
  5. Degradation, if detected;
  6. Conclusion and recommendations, resulting from the interpretation of the geophysical investigations.

6. Estimated Cost of the scope of Work:

The bidder is requested to break the costs into:

  • Mobilization/demobilization;
  • Travel and Investigations;
  • Reports’ production;
  • Findings presentation of one day workshop (inception and final).

7. Time Schedules

The time duration for field work, report preparation and submission of report shall be 30 days for each of the two phases (inception and after grouting), separated by the grouting works, which will take maximum six months.

The implementation period will be approximately 120 days from contract signing.

The detailed Terms of Reference (TOR) for the assignment can be obtained at the address given below.

The Irrigation Restoration and Development Project (IRDP) now invites eligible consulting firms(“Consultants”) to indicate their interest in providing the Services. Interested Consultants should provide information demonstrating that they have the required qualifications and relevant experience to perform the Services. The short-listing criteria are:

  1. general qualifications of the Consultant (10 points),
  2. description of similar assignments, experience in similar conditions (60 points); and
  3. availability of appropriate skills among staff (30 points).

The attention of interested Consultants is drawn to paragraph 1.9 of the World Bank’s Guidelines: Selection and Employment of Consultants under IBRD Loans and IDA Credits & Grants by World Bank Borrowers dated January 2011 (“Consultant Guidelines”), setting forth the World Bank’s policy on conflict of interest.

Consultants may associate with other firms to enhance their qualifications but should indicate clearly whether the association is in the form of a joint venture and/or a sub-consultancy. In the case of a joint venture, all the partners in the joint venture shall be jointly and severally liable for the entire contract, if selected.

A Consultant will be selected in accordance with the [CQS] method set out in the Procurement Regulations.

Further information can be obtained at the address below during office hours 08.00 to 16.30 hours from Monday to Thursday and 08.30 to 14.00 on Friday.

Expressions of interest must be delivered in a written form to the address below (in person, or by mail, or by fax, or by e-mail) by 27 March,2019.

Eng. Ghulam Mohammad Arifi

Acting Director of Project Coordination Unit PCU

Ministry of Energy and Water

Email address:-

Phone: 0799346011

Copy to

Phone: 0700686110