Consultancy to conduct technical supervision of the rehabilitation of 3 existing boreholes, including the development of BOQ’s

Habitat for Humanity Kenya is seeking to hire a Consultant/Consulting firm with the capacity to execute the following task:

Conduct technical supervision of the rehabilitation of 3 existing boreholes, including the development of BOQ’s.

LOCATION: Solio Settlement Scheme (Bahati- village 3, Mukandamia-Village 6 and Baraka village 7)

1. Background and Rationale

Habitat for Humanity Kenya (HFHK) was established in 1982 as a not-for-profit, non-governmental organization with the goal of enabling low-income families access decent and affordable shelter. It is an affiliate of Habitat for Humanity International (HFHI) and is governed by the National Affiliation Agreement of 2019. The organization’s approach has evolved from direct provision of homes to families with access to land, to providing support and capacity building to community level structures as a catalyst for transformation. In the last 40 years, HFHK has supported more than 345,000 families across 9 counties in Kenya through housing micro-finance and direct construction.

Currently, HFHK is operational in Laikipia, Homabay, Kisumu, Tana River, Machakos and Makueni counties under a Strategic Plan (2020-2025) which outlined four programmatic areas, namely: Financing for Owner-led Construction (FOC); Settlement-Based Practice (SBP); Secure Land Tenure (SLT); Disaster Risk Reduction & Response (DR3).

HFH Kenya is implementing a 39-month project to Improve the resilience to climate change for rural people in Solio settlement scheme, Laikipia county. the 3-year and three months project aims to rehabilitate non-functioning boreholes in 4 villages, construction of 3 new boreholes and four 1,000m3 water pans to support farming activities, identification and provision of access to financial services and capacity building of community members on financial skills to ensure good management of income from agriculture and other activities and to promote climate change adaptation technologies at the community level and finally the promotion of WASH best practices in the community. We have already conducted preliminary studies that outlines the rehabilitation needs, specifications and recommendations through a Water Resource Mapping Survey and Test Pumping Exercise in the targeted villages.

1. Purpose and Objectives

The main objectives of this project are:

1. To provide technical guidance in the recruitment of a contractor for rehabilitation of 3 boreholes

2. To conduct technical supervision of the rehabilitation of 3 existing boreholes, including the development of BOQ’s.

   Project Location

The assignment will be implemented in 3 villages within Solio settlement: Village 3 (Bahati), 6 (Mukandamia) and 7 (Baraka).

1. Scope of work- Borehole rehabilitation supervision

• Assist in tendering by developing Bills of Quantities (BOQs) for rehabilitation of 3 existing boreholes in the 4 villages that will be used in seeking quotations from prequalified contractors during bidding process, as well as developing the contract document and specifications.
• Supervise the rehabilitation works and ensure the boreholes rehabilitated and completed according to stipulated technical specifications (Hydrogeological Survey Report to be provided later) and to sound professional standard, including the geological borehole logging and documentation of pumping test according to standard formats.
  • Supervise and document daily the rehabilitation works carried out and test pumping of the existing boreholes and hand-in a daily rehabilitation progress report to HFHK.
  • Supervise the rehabilitation of the 3 existing boreholes.
  • Ensure that the borehole rehabilitation contractor does water sampling, geological logging, and water quality analysis (chemical and bacteriological).
  • Adapt the general well-design according to the specific conditions, basing it on the geological log and on the results obtained from the pumping test.
  • Supervise installation of screens, casings, gravel pack, impermeable seals, well-heads etc. Ensuring that the recommended design and materials are followed and propose and carry out quality control measures upon well-completion, e.g., borehole camera inspection.
  • Prepare a detailed borehole rehabilitation completion report, with all necessary recommendations e.g., pump capacity, optimum depth of installation, periodic water quality analysis according to the standard format.
  • All these documents shall be summarized in a report, which will also include a quality control review of the rehabilitation report from the contractor.
  • Compile a comprehensive final report (2 hard copies plus softcopy including all the raw data) and submit to HFHK.
• Obtain all certificates and acquired documentation from the contractor and submit to HFHK at the end of the project.
• Issue completion certificate for the release of retention moneys and the project defects liability period.

The basic rehabilitation process should consist of the following principal stages in this order:

• Collection of archives and information (from water authorities, drilling companies, aid organizations, etc.) on the borehole design
• Inspection by closed-circuit television (CCTV)
• Breaking-up of clogging deposits and incrustations
• Removal of silt and debris by surging and airlift clearance pumping
• Borehole disinfection
• Step-draw down test

Note: All CCTV runs should be logged in detail and videotapes of the inspection retained for future reference.

The consultant must demonstrate an in-depth understanding and experience with the following borehole rehabilitation methods and actions.

• Water jetting
• Air-burst technology
• Acidization
• Hydro-fracturing
• Relining
• Borehole sterilization
• Step draw down testing
• General mechanical repair of boreholes

5.Deliverables and Timelines -Borehole rehabilitation supervision

The consultant is expected to start working on the assignment for a duration of at least 3 months subject to changes due to extreme weather conditions. Before heading out to honor the assignment, the consultant is required to submit an inception report and defend the delivery plan through presenting to HFH Kenya management team as shall be scheduled by HFH Kenya during contracting of the assignment. The consultant will be expected to work closely with the HFH Kenya management, HFHK Laikipia region field officers, Laikipia County government, Water Resources Authority, Project Steering Committee, and the national government administration officials in carrying out the assignment. The deliverables of this assignment are as follows.

• Inception report describing in detail how the consultant plans to execute the key deliverables.
• Develop and submit accurate and reliable Bills of Quantities for the existing boreholes.
• Supervision of the rehabilitation works of the existing boreholes.
• Technical Borehole rehabilitation supervision report.
• Application to secure relevant government permits-Water Resources Authority (WRA) for the four water sources.

In fulfilling their obligations under this TOR, the consultant(s) will also be required to deliver to HFH Kenya all study (borehole rehabilitation supervision) materials including and limited to:

• Soft copies of all data sets both quantitative and qualitative.
• Soft copy of topography or google map for the survey area clearly indicating the borehole points and the villages.
• Any other non-consumable documents/items that will be used during the planned consultancy.

6. Qualification and Experience

The potential Consultant should have the following qualifications.

• A master’s or postgraduate degree in Hydro-geology/Geology/Geophysics or Environmental Sciences or engineering or water engineering.
• Must be licensed as a qualified water professional preferably as a hydro-geologist.
• Must be registered by the Geological Registration Board and preferably an active member of the Geological Society of Kenya (GSK).
• A consultancy firm with proof of previous experience in executing similar projects especially in Laikipia -Solio settlement scheme will be an added advantage.
• Knowledge of integrated water management and its relations to adequate and affordable housing and the challenges inherent in the country and/or professional experience working in the sector.
• At least 10 years proven experience in conducting and interpreting hydrological/geophysical surveys using diverse techniques.
• Proven experience in drilling supervision and borehole documentation.
• A reliable and effective analyst with extensive experience in conducting analyses and a proven record of delivering professional results.
• Excellent computer skills and desirable skills in Arc GIS and groundwater modelling software’s.
• Excellent presentation and report writing skills.