GRANT-0361 NEP: Project Preparatory Facility for Energy - E3 Construction Expert Engineering Geologist for Constructability Review, Quantitative Risk Assessment (QRA) and Schedule Risk Assessment (SRA) of Dudhkoshi SHEP (E-047036-001)

1. Project objective

Objective and Purpose of the Assignment

Dudhkoshi Storage Hydroelectric Project (DKSHEP) is a proposed 670 MW storage hydropower project to be

developed on the Dudhkoshi River in eastern Nepal between the boundaries of Okhaldhunga and Khotang

Districts.

Nepal Electricity Authority (NEA) had employed ELC Electroconsult S.p.A. (Italy), in

association with NEWJEC Inc. (Japan), to carry out the “Updated Feasibility Study and Detailed Design of

Dudhkoshi Storage Hydroelectric Project” under grant assistance from Asian Development Bank (ADB).

The main 600 MW powerhouse will be an underground facility on the left bank of the Sunkoshi River and 70

MW Dam-Toe powerhouse, also underground, will generate energy from environmental flow release and is

proposed on the right bank of the Dudhkoshi River.

A 220-meter-high concrete-faced rock-fill dam (CFRD)

will create a 31.5-kilometer-long reservoir with a capacity of 1,581 Mm3.

The dam site is located

approximately 210 kilometers east of Kathmandu by road.

For the main 600 MW powerhouse, a natural head of 132 meters will be available from a 13.15-kilometerlong main water tunnel, supplemented by an additional 210-meter artificial head from the reservoir.

The

main Head Race Tunnel is planned to be constructed by using Tunnel Boring Machine (TBM).

The design

discharge for the main powerhouse is 224.4 m3/s.

The Dam-Toe Powerhouse is designed to operate with a

rated head of 182 meters and a design discharge of 40 m³/s.

The construction lots are categorized as follows: Lot 1 (Dam, Intake, and Spillway with Hydraulic Steel

Equipment) and Lot 2 (Main Tunnel and Power House with Hydraulic Steel Equipment) both follow the FIDIC

Conditions of Contract for Underground Works, (Emerald Book, 2019) contract model while Lot 3 (Electromechanical Works) will follow the FIDIC Conditions of Contract for Plant and Design Build (Yellow Book,

2017) model.

DKSHEP is being developed through a Special Purpose Vehicle (SPV) with financing structured through a

blended approach, which integrates an optimal mix of concessional and commercial loans from

international and domestic lenders and a direct equity component, with equity participation contributed

by the Government of Nepal (GoN), NEA, and its other entities and shareholders.

The Project is progressing towards readiness from technical, financial, environmental and social and

power markets perspectives with the aim of achieving financial close by October 2026.

The Project SPV –

Dudhkoshi Jalvidyut Company Ltd. (DKJVCL) – has been set up with a Board and a core executive team.

This

SPV needs to work closely with NEA, Ministry of Energy, Water Resources and Irrigation (MoEWRI),

Ministry of Finance (MoF), Asian Development Bank (ADB) and other stakeholders towards completing these

activities in time and with the quality required for development of projects of this scale.

DKSHEP is now looking at engaging a Construction Expert – Engineering Geologist (CE-EG) to conduct

constructability review, Quantitative Risk Assessment (QRA) and Schedule Risk Assessment (SRA) for the

Project to provide information on constructability, risks of various activities in construction

quantities and schedule and determine the level of contingencies to be incorporated in the cost and

schedule of the Project.

This input will be vital to the Chief Executive Officer (CEO) of DKJVCL and his

management team for finalizing the project valuation, financing, and construction management issues at

DKSHEP.

Scope of Work

CE-EG will work together with a Construction Expert – Construction Management and Contracts (CE-CMC) and

Risk Analyst (CE-RA).

CE-EG shall be responsible to conduct required studies, including field visit,

review project engineering documents, discussions with Project team, Consultant and other experts, to

determine constructability of the Project, determine potential variation in estimate of quantities and

construction schedule from an engineering geological perspective including TBM related risks.

To ensure

a unified assessment of site conditions, the CE-EG shall conduct the site visit concurrently and in

close coordination with the CE-CMC and CE-RA;

however, the specific duration of each expert’s field

presence may be adjusted according to their individual technical responsibilities.

CE-EG will provide

relevant inputs to the CE-CMC in finalizing the report on Constructability of the Project and shall

provide inputs to the CE-RA on quantity and schedule variations for probabilistic assessments.

These

inputs shall be provided in a workshop that will be led by the CE-RA and shall be conducted at the

Project Office together with CE-CMC, Project Team and Consultants.

CE-EG will also review the proposed

construction methodologies and suggest proposals to construction methodologies and techniques to justify

construction period of 7 years.

The CE-EG shall share technical expertise and knowledge through meetings, consultations and field

visits.

The CE-EG shall document the results of each of its visits including the overall conclusions and

recommendations.

The expert shall maintain the confidentiality of all confidential information which

shall not be disclosed to any third parties without the written consent of DKSHEP

The essential details of the Project for this assignment;

reports and other details will be provided to

the selected consultant

Detailed Tasks and/or Expected Output

The detailed tasks and responsibilities for the CE-EG shall include, but will not be limited to the

following works:

1.

Review of Project reports regarding geology, geotechnical investigations, consultant’s design

documents and drawings, Geotechnical Baseline Report, Geotechnical Data Report;

2.

Site visit to assess ground conditions for the proposed studies on constructability, QRA and SRA

3.

Assess if rock class estimates are adequate, assign deviation possibilities along the tunnel

alignment and at underground powerhouse location.

4.

Assess the geological risks specifically for TBM Tunneling along the HRT alignment, including the

adequacy of the GBR, as governed by the FIDIC Emerald Book, and assigning deviation possibilities for

rock class and support considering TBM operation.

5.

Determine the adequacy of rock support design and assign deviation along tunnel alignment and at

underground powerhouse location.

6.

Determine the adequacy of subsurface investigations at the dam and spillway location.

Assign

deviation possibilities along the surface and subsurface excavations, abutments, drainage galleries, etc.

7.

Assess construction methodology for dam area excavations;

8.

Determine the adequacy for construction of 220-m high CFRD, availability of construction materials,

construction planning and sequencing;

9.

Assess Constructability of the Dam, headrace and tailrace tunnels, underground powerhouse complex and

construction technique/methodology;

10.

Provide training to the Project team on the industry-standard software utilized for QRA and SRA, as

well as the interpretation of its outputs, if required by DKSHEP.

11.

Participate in the Constructability and QRA & SRA Workshop.

Provide inputs to the QRA and SRA of

important project structures – dam, spillway, headrace tunnel, underground powerhouse complex, tailrace

tunnel.

12.

Conduct assessment of schedule of dam construction and of tunnels using industry-standard software.

13.

Provide reports on engineering geological aspects of the works conducted for this assignment.

This

will be compiled by the CE-CMC for the final Constructability Report and by the CE-RA for the QRA and

SRA reports.

With particular reference to pandemic disease outbreaks, any need for international and/or national

travel shall be assessed by DKSHEP and the Consultant using DKSHEP's advice at the time of travel.

Subject to DKSHEP's approval, the Consultant may use remote video technology meetings to replace face to

face meetings as considered necessary.

Minimum Qualification Requirements

The CE-EG shall have the following minimum Qualification and Experience:

1.

Master’s degree or equivalent in Engineering Geology;

2.

At least 20 years General Experience in Hydropower Project (Project Identification, Project

Development, Construction Management, Operation and Maintenance)

3.

Experience in Construction of at least one hydropower projects with underground structures with

installed capacity of 300 MW or above

4.

Experience in Constructability Review, QRA & SRA of at least one hydropower projects with installed

capacity of 300 MW or above.

5.

At least 10 Years International Experience (other than Home Country) in Development and Construction

of Hydroelectric Projects

6.

Experience in Construction of at least one hydropower projects with installed capacity of 100 MW or

above in Himalayan Geology (Nepal, Pakistan, Bhutan, India, Myanmar, Afghanistan).

Minimum General Experience 20

Years

Minimum Specific Experience (relevant to assignment) 0.17

Years

Regional/Country Experience Required

Desired

Not Required

Deliverables

Details Name Type Estimated Submission Date

Inception Report after the Site Visit and Constructability and QRA & SRA Workshop.

Report

Constructability Review Report including highlighting areas of concern from a constructability persp Report

QRA and SRA reports with cost and schedule estimates for base case, best case and worst-casescenario Report

Recommend proper construction methodology.

Report

Recommendations for alternate construction methodologies for safe and timely construction of project Report

Recommendations for key parameters for monitoring of works during construction Report

Recommendations for industry-standard software to be used during construction.

Report

Schedule and Places of Assignment (chronological and inclusive of travel)

Schedule Type Continuous

Intermittent

Max.

Working Days/Week Home Office 5

Field 5

City and Country Working Days Estimated Start Date Estimated End Date Other Details (use if place selected is Others)

Kathmandu, Nepal Search and Select: Place

10 16-Nov-2026 27-Nov-2026 Travel to Project Site on project related matter is required.

Home Office, Other Search and Select: Place

44 28-Nov-2026 28-Jan-2027

Kathmandu, Nepal Search and Select: Place

12 29-Jan-2027 15-Feb-2027 Travel to Project Site on project related matter is required.

Total

66

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All rights reserved.

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