01 / Structural Reinforcement
02 / Continuous Operations
03 / Modernized Standards
Execution Challenge
The primary execution constraint involved stabilizing a live, high-capacity reservoir without lowering water levels or disrupting municipal water transmission.
Geotechnical complexities on the Deccan Trap basaltic foundation demanded non-destructive anchoring techniques.
Working on an aging, high-consequence masonry structure meant that induced vibrations from traditional civil interventions threatened the dam's structural stability.
Additionally, seasonal monsoonal cycles restricted the active downstream construction window to narrow, non-rainy periods.
Strategic Role
Mr Avarrsekar led a bid strategy that aligned the company's marine and mass-concrete methods with MCGM's technical requirements, and set up governance and risk oversight for delivery.
As the senior interface with municipal engineers, he sped up design validation and material clearances, protecting progress from the administrative and public scrutiny attached to a critical water asset.
Actions Taken
- Formulated an accelerated mass-concrete deployment schedule for downstream buttress installation.
- Used zero-vibration drilling to anchor foundations into basalt.
- Monitored structural deflection in real time throughout execution.
- Managed multi-tier logistics to move heavy aggregate through sanctuary zones.
- Certified bonding with the legacy masonry through non-destructive testing.
Outcome
The successful installation of massive downstream concrete buttresses restored the dam’s stability to modern seismic requirements, ensuring complete water security for Mumbai.
The engineering turnaround validated how aligning complex technical competencies with rigid public sector procurement criteria mitigates critical infrastructural vulnerabilities.
For contemporary contractors, this success case illustrates how translating specialized engineering risks into structured tender responses drives high-margin business growth and predictable project handovers.
Technical Data of Record
Scope of Work
Strengthening and raising of the masonry gravity dam through downstream reinforced concrete buttresses, rock anchoring and interface pressure grouting.
Key Specifications & Challenge
Mass concrete buttresses, Deccan Trap rock anchors, low-heat cement with fly ash and epoxy and polymer-modified grouting. Works under full reservoir load, no blasting near 19th-century masonry, and logistics within a wildlife sanctuary.
Major Deliverables
A seismically stabilized dam, a complete buttress network, validated foundation anchorage and structural health instrumentation logs.
Result
Stability restored to modern seismic requirements, with monitoring by piezometers and ultrasonic joint-meters and 100% material testing and core sampling.
Client
Municipal Corporation of Greater Mumbai (MCGM)
Location
Tansa River, Thane District, Maharashtra, India
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