Re-advert- Invitation For bid Borehole Drilling in Ceel Xume Village – Odweine District, Somaliland

Re-advert- Invitation For bid Borehole Drilling in Ceel Xume Village – Oodweyne

Re-advert- Invitation For bid Borehole Drilling in Ceel Xume Village in Odweine District, Somaliland

ADO Background

ADO is the leading NGO in Somalia/Somaliland, established in 1993, and implements crop, livestock, fodder, and fish production projects supporting the poor households impacted by climate change-associated shocks. Furthermore, ADO has provided resilient livelihood opportunities, climate change adaptation, and mitigation for rural communities through SMART agriculture programming and dryland farming and empowered women while creating a women-owned small business that generated huge incomes through self-help groups. Further, the ADO implements emergency and recovery programs to build the resilience of rural communities through conditional and unconditional cash and input support.

The ADO specializes in food security, WASH, environmental conservation, resilience, emergency, rural education, agriculture extension, and research programs; and has reached 1.2 million people across Somalia over the past seven years. ADO has its Head Office in Hargeisa. Besides, regional branch offices in Burao, Borama, and Erigavo. Furthermore, the ADO is in the Somali Ethiopia Region, South-central and Southern Somalia. Moreover, ADO is an active member of the main local umbrella groups: NAGAAD, SOLPAF, Somali NGO Consortium, and SONSEF.

1.1 Project Background

Somaliland/Somalia has experienced three straight seasons of below-average rainfall. It is on the verge of experiencing a fourth underperforming harvest season in the forthcoming April-to-June 2022 Gu rainy season. Over 4.5 million people are affected by the drought, an upward increase from 3.2 million in December 2021. The devastating impact of the drought, combined with insecurity and recurring climatic and other shocks, including riverine and flash floods, desert locusts, and the COVID-19 pandemic, has exacerbated the already precarious situation in Somalia (UN OCHA Somalia drought situation report, no January 3 2022. The Humanitarian Needs Overview (HNO) and Humanitarian Response Plan (HRP) 2022 estimates that 7.7 million people will be in severe need of humanitarian assistance in 2022, an increase of 30% from the previous year.

According to the WASH Cluster, 2.6 million people in Somalia are facing water shortages due to severe drought conditions in Somalia. Water scarcity and drought conditions have contributed to increased water prices leading to displacements, diarrhea-related morbidity, and malnutrition in many parts of Somalia. The current worst affected regions include Gedo, Bay, Bakol, Lower Jubba, Galgadud, Mudug and parts of Bari, Nugaal, Sool, Sanaag, Togdheer, and Hiraan regions.

Given the above humanitarian crisis, Agricultural Development Organization (ADO) will respond through a WASH-based intervention in Odwayne District, Togdheer Region. ADO aims to reach 3,840 households (28,040 individuals) through this intervention.

The goal is to increase the resilience of chronically vulnerable Somali people, households, communities, and systems to climatic shocks and other related risks in targeted pastoral, agro-pastoral livelihood zones by 2023. The SHF-funded emergency project supports communities in identifying water points to rehabilitate, construct, and upgrade to improve their resilience within the framework of a district-level strategy. However, ADO is looking for qualified, expert drilling companies to dig a new borehole in Ceel – Xume Village in Odweine District, Somaliland.

OBJECTIVES:

This assignment aims to drill, construct and develop a new borehole in Ceel-xume, ensuring a minimum required safe yield and water quality parameters. The main objective is to develop reliable production boreholes digging 350 m –400m.

MOBILIZATION

Mobilization shall consist of all, necessary manpower, drilling rig and tools, and construction materials to different sites. Demobilization shall consist of clean-up work and operations including, but not limited to those necessary to the removal of personnel, equipment, and incidentals from the project site.
The contractor shall also mobilize all the necessary materials such as water for drilling, drilling chemicals fuels etc, which are required during the progress of the works.
DRILLING

The contractor shall clear the site during rigging up and excavation of mud pit and measurements shall be the net-in-site volume obtained from the difference between the lines and levels of the ground surface agreed with the Employer before excavation is commenced.
Where drawings do not indicate profiles, then these shall be held to be equal to the net plan area with the sides taken as vertical.
The contractor shall only adopt mud system since collapse and circulation loss is expected in the area.
The contractor shall use different drilling fluid Bentonite, drilling foam etc., with appropriate drilling technique.
Units of measurements for drilling shall be in meters and measurements are taken based on geological samples taken after drilling.
The rates of drilling shall be based on geological formations.
Geological logging shall be performed after the end of each drilling and drawings should be submitted accordingly.
Drilling up to the estimated depth shall not necessarily proceed and drilling can be ceased based on the hydrogeological and geological condition when approved by Employer Hydrogeologist (Engineer).
The upper unconsolidated shall be drilled 17-inch drill bit.
The remaining diameter of the wells shall not be less than 12 ¼ inch.
The drilling equipment and methods used should be capable of drilling through both overburden and bedrock.
If the boreholes are drilled with rotary equipment and the following drilling fluid may be used,

Drilling mud containing Bentonite or other clay minerals.
Drilling mud composed of water and a thickening agent containing no solid particles. Examples are the starch-based mud, revert, and polymer-based mud such as quick thick.

INSTALL CASINGS

Surface steel casing of minimum 14 inch might be needed for the upper unconsolidated sediments.
Deep boreholes beyond 300 m depth steel preproduction casing and screens of 8″ in diameter shall be used
The rates of casing (blind or screen) shall include installing up to desired depth.
Installations of casings and screens shall be up to required depth as per standards and the geological logs to meet the function of the aquifer and the type of pumps to be used.
Minimum wall thickness for all well casing shall be 6 mm.
Well screen shall be continuous slot wire wound screens as manufactured by Johnson screens or equivalent. For different sizes, the slot size should be specified by the Engineer after sieve analysis of the aquifer samples.

GRAVEL

Gravel for drilled wells shall be river gravel, round and having sufficient strength and proper sizes to meet the designed screen for proper filtration (the gravel should be siliceous in composition). Gravel should also be washed with water to remove weathered particles before packing.
Gravel shall be supplied and packed up to the required depth and shall be measured in meter cube.
Gravel size is selected based on the geological strata of the drilled well.

WELL CLEANING AND DEVELOPMENT

The well shall be cleaned and developed so as to arrange the positions of gavels for a good filter media so that clean water can be drawn while developing.
The time interval for cleaning and developing shall be of minimum twelve (12hrs) and the unit of measurement is in hours (hrs).
The well shall be grouted with mass concrete up to a maximum depth of 2m and a well head shall be constructed facilitating a good drainage that protect vertical seepage around the well

8.1 METHOD AND EQUIPMENT FOR PUMPING TESTS

The contractor shall provide the following equipment

Submersible pump designed to pump water at the desired depth.
Diesel generator to run the pump.
Suitable devices to measure the discharge.
Water level measurement device capable of measuring the desired depth.
EC meter for electrical conductivity measurements during pumping tests.

8.1 Data collection

Step draw-down test:

Test pumping will comprise an extended step draw-down test of 3 hours duration for each step and minimum of five (5) steps is required.

Continuous Draw-down (Constant rate Test) The duration of the test shall be 72 hours.

3) Recovery test

After 72 hours of continuous test, the pump should be turned off and measurement of water level recovery should be immediately be undertaken

4) Field analysis

During the pumping tests, pH, EC (electrical conductivity) and the temperature of the water should be measured.

5) Chemical analysis

Two samples of 5 liters each shall be collected at the end of the pumping test for further chemical analysis of the water to determine the water’s portability and should be compared with WHO guidelines. The tests that should be performed are bacteriological and physio-chemical analysis. The parameters to be analyzed should include: PH, Alkalinity, Hardness, Electrical Conductivity, and major and minor Cations & Anions (Na+1, K+1, Ca+2, Mg+2, Fe+3, HCO3,

CO3-2, Cl-1, F-1, NO3, NO2 and so on)

WELL HEAD CONSTRUCTION

The contractor shall construct a well-built well head in order to protect the well against pollution. The well head should be constructed with concrete mix of 1:2:2 ratios.

REPORTING

A final report shall be produced for well including but not limited to the following information:

Location and reference number of the well
Make and type of drilling rig and details of tools used
Names of Foremen and Drillers
The detailed log of drilling activities
Well screen and casing arrangements
Details of gravel pack sections, Bentonite seals and inert fillings  Details of development operations carried out.
Detailed diary of test pumping operations.
Result of pumping test analysis
A complete record to all water level readings time and discharge.  Details of the pump and its installation depth.
Complete chemical analysis of ground water

BIDDING PROPOSALS AND EVALUATIONS CRITERIA

The bidder should have established credibility in working in the water sector and must have a good tracking record of Borehole drilling as a water source for drinking water.
The contractor must ensure the quality of work and hire qualified staff to achieve results. Qualifications of key experts are identified under these Terms of Reference.
Experience in Borehole drilling and Operation and Maintenance of deep wells, pump stations, pipes, and all related electrical and mechanical components.
Construction and management of water project projects, including management of teams, procurement, documentation, supplies, information flow, inventory, safety and quality assurance.
Experience in working with the UN system, other humanitarian agencies or governments in similar BH drilling and water project operations and ability to meet the standards of international organizations and donors.\

Bidders Must Have

Advert Note

ADO is hereby inviting all eligible bidders to apply for dig a new borehole in Ceel – Xume Village in Odweine District, Togdheer Region- Somaliland.

Valid trade license from the Ministry. The contractor will not be eligible for the technical proposal review stage if the valid trade license is not submitted.
Valid classification from the Ministry of Water Resources Development with the first or second grade of Borehole Drilling.
Operating for the last 5 years in the borehole drilling, developing and maintenance and made at last two or more successfully drilling for the last 2 years.

How to apply

Detailed specification and drawings are included tender document, all eligible bidders are requested to visit ADO Hargeisa office to collect the complete tender package, if you are interested in submitting a bid, please collect the tender documents form, or requested by email abdirahman@adosom.org

Tender closing date is November 20, 2022 at 1:30pm. The ADO will not accept documents sent through emails.

All completed tender should be summited in sealed envelope to be bring Hargeisa office. The envelope should indicate the tittle of tender notice, but have no other details related to the bid.

For further clarification and Queries should be directed to abdirahman@adosom.org or call 0634849727 for direction

Late bids should be rejected and no liability will be accepted for loss, late delivery or non-delivery.

Agricultural Development Organization (ADO)

Hargeisa office, Somaliland

Near young Muslim Academy or Sha’ab court area

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