Ahmedabad Municipal Corporation Tender for Drainage Line Upgradation in Mansuri Chawl

The scope of work includes:

• Upgrading existing drainage pipelines to improve water flow capacity.
• Laying new sewer and stormwater drainage lines as per approved drawings.
• Construction of manholes, catch basins, and inlet structures for effective water collection.
• Ensuring proper alignment and slope for efficient drainage.
• Testing and commissioning of all installed pipelines and structures.

The process involves:

1. Site inspection and survey.
2. Preparation of detailed work plan.
3. Procurement of materials as per specifications.
4. Execution of excavation, laying, and jointing of pipelines.
5. Installation of ancillary structures.
6. Quality checks and testing.
7. Final commissioning and handover.

All work must comply with local regulations, safety standards, and environmental guidelines.

The technical parameters include:

• Pipe materials compliant with IS standards (IS 4984 for HDPE, IS 4985 for PVC)
• Pipe diameter range: 150mm to 300mm
• Slope gradient: Minimum 1% for effective drainage
• Manholes: Made of reinforced concrete or precast concrete, size 600mm x 600mm
• Installation procedures: Trenched laying with proper bedding and backfilling
• Testing: Hydrostatic and pneumatic tests to ensure leak-proof connections

Sequential process:

1. Site survey and marking.
2. Excavation as per approved drawings.
3. Laying pipes with bedding.
4. Jointing and fixing structures.
5. Covering and compaction.
6. Final testing and commissioning.

The estimated project cost is INR 12,00,000. The budget breakdown is as follows:

Payment terms include:

• 20% advance upon contract signing.
• 50% during mid-project milestone.
• 30% upon successful completion and handover.
  All payments are subject to approval of work progress and quality compliance.