(DSPE) - Geotechnical Specialist Reference No
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NDËRMARRJ A H IDROEKONOMIKE “IBËR - LEPENC” SH.A. HYDRO - ECONO MIC E NTERPRISE “IBËR - LEPENC” J.S.C. VODOPRIVREDNO PREDUZEĆE “IBËR - LEPENC” D.D REQUEST FOR EXPRESSION OF INTEREST (CONSULTANCY SERVICES – INDIVIDUAL CONSULTANT) COUNTRY: REPUBLIC OF KOSOVO NAME OF PROJECT: Water Security and Canal Protection Project (WSCPP) Credit No. CR5902-XK Project No. P133829 Assignment Title: Dam Safety Panel of Experts (DSPE) - Geotechnical Specialist Reference No. WSCP-CS-IC-6 The Government of the Republic of Kosovo has received financing from the World Bank toward the cost of the Water Security and Canal Protection Project (WSCPP), and intends to apply part of the proceeds of such financing for consulting services for which this Request for Expressions of Interest (REoI) is issued. The WSCPP (being implemented under Credit Agreement CR5902-XK between Republic of Kosovo and the World Bank - IDA) has the objective of restoring the Ibër Canal to its original capacity and to improve water resource management for various canal users in Central Kosovo. This will ensure that more reliable and better quality water benefits approximately 500,000 people residing in the central Kosovo canal basin, and becomes a supporting factor for economic and social development. The Iber Lepenci Company (ILC) – a parastatal under the Government of Kosovo – is the Implementing Agency for the WSCPP. The Gazivoda Dam and Mihaliq Dike-Reservoir are 2 critical infrastructure elements of the WSCPP. The Gazivoda Dam, is a rock-filled embankment dam on the Ibër River in the District of Mitrovica, Kosovo. It was completed in 1979 and forms Gazivoda Lake, the largest reservoir in Kosovo. Gazivoda Lake covers 11.9 km2 (4.6 sq mi) of which 2.7 km2 (1.0 sq mi) are in Serbia. At 101 m (331 ft) in height, it is also the tallest dam in Kosovo. Discharge water from the turbines (hydropower plant) and biological minimum from river Ibër is collected by the smaller Pridvorica reservoir and dam, height 10 m located below Gazivoda. Dam with four controlled gates. Mihaliq dike – reservoir, the construction of a 600 m long and 25 m high earth dike across a wide creek above the Ibër Canal creating a compensation reservoir of about 3.7 million m3, a pumping station to lift water from the Ibër Canal to the reservoir, and a pipeline of 2 km to supply the Pristina municipal regional water company presently under construction during periods of high turbidity of the canal water. As part of the implementation of the WSCPP, a Dam Safety Panel of Experts (DSPE) is proposed to be instituted. The overall objective of the DSPE is to provide independent review and recommendations to ILC for ensuring that safety issues of the Dam subprojects to be financed by the World Bank are adequately addressed in terms of design, construction, operation and maintenance as required by the Dam Safety Safeguard Policy (OP4.37) of the World Bank. More specifically, the OP 4.37 requires that any dam that can influence the performance of the project or affect safety and performance downstream of the project area must be identified, its safety must be assessed, and necessary dam safety measures, remedial works and actions are identified and implemented. The DSPE will be established at the detailed design phase for remedial measures in Gazivoda/Pridvorica and detailed design for Mihaliq; and will be maintained throughout the project implementation phase and even during the initial period of the operations phase. The DSPE is expected to consist of 4 panel members, including: (i) Dam Specialist (Dam Engineering Design and Construction) (who will act as Chairperson of the DSPE) (ii) Hydrology and Hydraulics Specialist, (iii) Geotechnical Specialist, and (iv) Hydro Electrical and Mechanical Specialist. In addition to the 4 experts, other experts, can be mobilized for specialized review needs, if required. The main scope and input of the DSPE will be advisory in nature and in no way detracts from or substitutes for the expertise, resources, or responsibilities of the dam owners or the agencies and staff responsible for design and operation of the dams or the project consultants. In both the preparation and the implementation phases, the DSPE and its panel members purview is strictly limited to safety matters, and does not extend to financial or economic issues, selection of alternative designs, construction phasing, or any other features of the facilities except where safety is involved. The Client will organize periodic working missions of the DSPE (or its individual panel members) at the dam site depending on requirements in each phase of project implementation. The Client will provide DSPE with documents, information and data required for safety review in coordination with consultants and contractors. Scope of Services The primary tasks of the Geotechnical Specialist will include, but not be limited, to the following overall scope: (i) Review the geological and geotechnical aspects of design reports of the Gazivoda and Pridvorica Dam rehabilitation works and the new dam construction works, (ii) Review the geological and geotechnical investigation reports, such as drilled core assessment, permeability tests, in-situ and laboratory tests, etc.; and assess the need for additional investigation and tests, if required. (iii) Assess the nature and scope of the “fault” /weak shear zones at the dam foundation and plunge pool as well as sub-horizontal joints / seams in the banks and abutments. (iv) Review the geotechnical aspects of the plunge pool reshaping and required treatment works, such as concrete slab anchoring, grouting, drainage, as well as their design criteria, drawings and construction plans. (v) Review the seismological aspects of the dam site and areas as required. (vi) To review stability analysis and resulting factors of safety for normal, unusual and extreme loading conditions for embankment and concrete dams, spillways structures and outlet works including determination of seismic loading criteria; (vii) Perform the dam site inspection, along with the results of site investigation, survey and test results, and check their adequacy. (viii) Review the geotechnical aspect of the Construction Supervision and Quality Assurance Plan, and assess the result of instrumentation data related to geotechnical aspects of the foundation during construction works and recommend additional monitoring, survey and design modifications if any. (ix) Recommend follow up actions related to geotechnical aspects of the work (if any) to ensure the safety of the dam’s rehabilitation works, considering potential risks and required safety level. (x) Review the technical specification and drawings of the bidding document and provide technical support for the geotechnical aspects of bidding process, including pre-qualification, bid evaluation, contract negotiations; (xi) Review the adequacy of the instrumentation plan, such as piezometers, seepage measuring devices, settlement survey, slope inclinometers, and extensometers, including their numbers, locations, monitoring frequency, etc. (xii) Undertake periodic construction supervision to review the process of construction works to ensure that geotechnical related works are undertaken in overall conformity with the approved design documents, construction plan/schedule, etc. (xiii) Carry out field inspection for the purpose of geological assessment during foundation excavation and treatment works such as grouting and anchoring; (xiv) Review any major change in site design occurring due to the changes of geological conditions at the site. (xv) Coordinate with the DSPE chair and other panelists for fulfilling the assignments in the field and his/her home offices under the guidance of the client; and (xvi) Attend meetings with other consultants (Designer, Supervisory Engineer, etc.) and the Financiers (WB) under the guidance of the client. Implementation Methodology and Contract Duration: (i) The work schedule and milestones will be agreed with the ILC in coordination with other relevant agencies after appointment. Members of the DSPE are expected to conduct a mission including sites visit in general twice during detailed design and construction preparation phase for an estimated duration of 10 days per mission. (ii) The DSPE will be maintained on an on-call basis throughout dam project preparation and implementation period to provide technical review and guidance to ensure the dam and reservoir are sustainably rehabilitated, operated and maintained. (iii) The services of the DSPE are envisaged to start in April 2018 for an initial period of 20 working days. (iv) Duration of involvement will be up to end of project which is currently planned for 42 calendar months. (v) At the request of the ILC, the DSPE panel members may provide technical support from their home offices and through video/audio conferences. Qualification Requirements: The Geotechnical Specialist should meet the following minimum requirements: An advanced degree in Geology, Geotechnical Engineering or other relevant majors, Minimum 25 years of experience in relevant professional works, Having worked as a geotechnical expert in designing and construction of large dams including concrete dams. Intensive experience in preparing geotechnical aspects of construction plan and schedule for large-scale or complex dam projects. Intensive experience of geotechnical related works for dam safety planning, instrumentation and monitoring. Terms of Reference (ToR) for the required services is available with ILC The ILC now invites