Borehole and Water Works Invitation to Bid

What a good one includes

• A detailed scope of work that specifies drilling depths, expected casing materials, yield testing durations, and pump installation standards.
• Precise site information and geological data, including GPS coordinates, access constraints, and any existing hydrogeological survey reports.
• Mandatory contractor licensing, environmental permit requirements, and adherence to local water resource management authorities.
• A structured Bill of Quantities (BoQ) that breaks down itemized costs for mobilization, drilling per meter, casing, gravel packing, and sanitary sealing.
• Explicit instructions on the submission format, deadline, required references, and criteria used for technical and financial evaluation.
• Specific requirements for water quality laboratory testing, physical yield tests, and the provision of certified chemical analyses.

Common mistakes to avoid

• Omitting geological or site access constraints can lead to contractors claiming massive unforeseen cost variations once they arrive on-site with drilling rigs.
• Failing to provide a standardized Bill of Quantities results in disorganized bids that are impossible to compare side-by-side objectively.
• Neglecting to specify water quality testing parameters leaves you vulnerable to a completed borehole that produces non-potable or unusable water.
• Forgetting to verify the drilling contractor's specific licenses and environmental liability insurance before bidding can halt your project due to regulatory violations.

Frequently asked questions