Amaravati: Serious questions are being raised over the quality of construction works at the Polavaram project in Andhra Pradesh, with a report attributed to a foreign expert team reportedly pointing out several concerns related to the main dam and diaphragm wall.
According to the report, which was reportedly submitted to the Polavaram Project Authority (PPA) and the Central Water Commission (CWC) on August 28, the expert team raised questions about construction practices, material quality, inspection procedures and the availability of technical records.
The reported observations have triggered fresh concerns over the quality, safety and long-term stability of the Polavaram project, one of Andhra Pradesh’s most important irrigation projects.
Concerns Over Polavaram Main Dam Construction Quality
The reported inspection has raised questions about the materials being used in the Polavaram main dam works.
According to the details cited in the report, concerns were raised over the use of large boulders instead of properly graded stones required for construction.
For a major national project involving huge public expenditure, strict adherence to prescribed construction and quality standards is essential. If the reported observations are confirmed, questions could arise over who was responsible for monitoring the quality of the construction works.
Polavaram Diaphragm Wall Quality Under Scrutiny
The Polavaram diaphragm wall has emerged as another major area of concern.
The report is said to have pointed to several issues, including:
- Questions over whether the diaphragm wall achieved the required 1.5-metre thickness
- Concerns regarding the depth to which panels were constructed
- Dry conditions in the clay soil on both sides of the diaphragm wall
- Water bubbles reportedly observed in some panels
- Concerns that such conditions could potentially contribute to seepage in the future
These observations, if officially confirmed, could require a detailed technical assessment of the Polavaram diaphragm wall’s safety and long-term performance.
Questions Over Construction Equipment and Work Methods
Another issue reportedly mentioned during the expert inspection relates to the equipment used for construction.
The report allegedly states that tractor tillers were used because the required scarification equipment was not available.
This has raised questions over whether prescribed construction equipment and methods were followed during the execution of the Polavaram project.
Given the scale and importance of the project, authorities may need to clarify why the required machinery was reportedly unavailable and whether alternative methods were technically approved.
Missing Records Raise Leakage Prevention Concerns
The reported inspection also raised questions over the availability of complete technical records required to assess the leakage prevention capability of the Polavaram project.
Construction records, test results, inspection reports and quality certificates are critical for evaluating the performance of a major dam project.
If complete records are not available, it could become difficult to independently verify whether construction works were carried out according to the required technical standards.
Diaphragm Wall Repairs and Quality Certificates
Questions have also reportedly been raised over repairs carried out in certain sections of the diaphragm wall.
While repairs were reportedly undertaken, concerns have been expressed over the availability of quality certification for the repair works.
Authorities may therefore need to clarify:
- When and where were the repairs carried out?
- Who supervised the repair works?
- What technical standards were followed?
- Were the repaired sections tested?
- Were quality certificates issued after the repairs?
Clear answers to these questions would help address concerns over the structural performance of the diaphragm wall.
Questions Over Foreign Expert Team Inspection
Another issue mentioned in the reported observations concerns the composition of the expert team.
The team reportedly had four members, but only one member is said to have attended the inspection, while the remaining three did not participate.
However, the complete facts and an official explanation regarding this matter are yet to emerge.
Authorities may need to explain why the other members were absent, how the inspection was conducted and how the final observations were prepared.
Polavaram Project Needs Greater Transparency
The Polavaram project is not merely an infrastructure project. It is closely linked to Andhra Pradesh’s irrigation, drinking water supply, agriculture and long-term economic development.
Therefore, concerns regarding construction quality and structural safety cannot be ignored.
If the observations attributed to the foreign expert report are accurate, the government and project authorities should provide a detailed technical explanation.
The key questions include whether construction defects were identified, when they were detected, what corrective measures were taken and what the current safety status of the project is.
Polavaram Quality Concerns: What Authorities Need to Clarify
The reported observations raise several important questions about the Polavaram project construction quality. These should be addressed through technical data, inspection reports and official documentation rather than political statements.
The government and concerned authorities need to clarify the findings attributed to the expert team and explain what steps have been taken to address any identified deficiencies.
For a project of Polavaram’s scale and importance, construction quality, structural safety and transparency must remain the top priorities.
If the reported concerns are confirmed, a comprehensive technical review could help establish the actual condition of the main dam and diaphragm wall and provide clarity on the project’s long-term safety.
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