Damodar Valley Corporation (DVC) has invited bids for demarcating the boundary of land owned by it near Barhi, Hazaribagh district, Jharkhand, and conducting a topographical survey and geotechnical investigation to establish a ground-mounted solar power project.

With 6,687.2 MW from thermal and hydropower and 13.9 MW from solar, DVC plans to expand with 5,500 MW in renewables and 3,720 MW in supercritical and ultracritical thermal generation.

The company plans to have around 1,000 acres of land marked and surveyed to develop a solar project to add to its renewables portfolio.

The last date to submit the bids is May 27, 2024. Bids will be opened the next day.

The project involves several key activities. Firstly, locals will be engaged in land boundary demarcation, and village maps will be arranged or purchased.

A field survey/verification will be conducted, followed by the precast RCC demarcation pillar supply. The land boundary will then be identified and demarcated using these pillars.

The topographical survey phase will commence with establishing a permanent benchmark at the site. This will be followed by a comprehensive topographical survey using advanced devices like DGPS.

Trees will be identified and numbered, and objects and structures will be marked with locational geo-coordinates. Additionally, existing water bodies, nalas, and the routes of electrical lines passing through the land will be marked.

The survey data will be used to prepare a contour map, and a detailed report will be submitted.

The geotechnical investigation will involve field tests and laboratory analysis. Appropriate borehole locations will be identified, each tagged with locational geo-coordinates. Boreholes will be drilled up to six meters depth or until refusal, and soil samples will be collected.

These samples will be sent to an accredited laboratory for testing according to relevant standards. A comprehensive report summarizing the findings will be submitted.

The contractor can carry out these activities across multiple land parcels simultaneously, ensuring efficient progress and timely project completion.

Boreholes will be drilled up to a maximum depth of 6 meters or until the strata are refused, whichever occurs first, as specified. The estimated lengths of boreholes are as follows:

• In Soil: Approximately 160 meters
• In Rock: Approximately 80 meters

The project is expected to be completed within four months.

The contractor is responsible for arranging or purchasing Mouza maps at their own cost and means, whenever necessary, for a detailed topographical survey, as instructed by the site-in-charge.

The contractor is responsible for organizing all resources, including personnel, materials, instruments, surveyors, necessary records, and field data, at the work site.

The contractor must provide advance notice before demobilizing from the work site so that the site-in-charge can conduct a final inspection.

Recently, DVC invited bids for the design, engineering, supply, construction, erection, testing, commissioning, and five-year operation and maintenance of an 8 MW grid-tied ground-mounted solar power project at the DVC plant at Konar village in Hazaribagh District, Jharkhand.

In February last year, DVC invited bids from engineering, procurement, and construction contractors to commission an 8 MW ground-mounted solar project in Dhanbad, Jharkhand.

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