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Umiam Dam (part 2)

Although originally scheduled for completion in early 1963, the Barapani (or Umiam) Hydroelectric Project did not come online until June 1965. The dam was built by a combination of hand labor and imported American heavy machinery, such as bulldozers and backhoes. An American loan of $2.5 million covered the foreign exchange costs of the project, for the purchase of construction machinery as well as the turbines. The in-country costs of the project were $13.1 million, which were also covered by an American loan.1

The Barapani project was the second hydroelectric project undertaken after independence in Assam. The first was the Umtru Hydel Project, lower down in the Khasi Hills. The project, completed in 1957, was financed by Canadian capital from the Colombo plan. A run-of-river project, the dam relied on the flow of the Umtru River to turn its turbines for producing electricity.2 Umtru Dam was not capable of producing consistent levels of power throughout the year, because the flow of the Umtru River varied seasonally. Since snow never falls in the Khasi Hills, the area’s rivers rely entirely on rainfall. During the rainy season months, from around April to October, the rivers run high with heavy rainfall. But during the dry season, with no rain to feed them, the rivers sink and slow considerably.

The Barapani project offered a solution for the rivers’ unreliability. The project’s one concrete dam and two earthen dams plugged the bottom of the Umiam River’s gorge, creating a reservoir that could store water during the dry winter months. The power station was not located within the dam itself, but farther downhill, at an elevation 560 feet lower than the water intakes in the reservoir. A 1.5-mile conduit piped the water down to the power station. This arrangement provided greater head (pressure) for the turbines. After passing through the imported Japanese turbines of the first stage of the Umiam project, the water was diverted into the Sumer Stream, a tributary of the Umtru River. The Umiam reservoir thus provided a consistent water supply for both the Umiam and Umtru hydroelectric projects.3

The Umiam Hydroelectric Project was included in India’s Second Five-Year Plan, and it was overseen by the Assam state government. This project—like the scores of other projects included in Nehruvian India’s Plans—was imposed from the top by elites. Although the project was located in a rural area, most of the local population had little stake in it besides serving as laborers during construction. The primary customers of the project were not the rural inhabitants of the Meghalaya Plateau, but the mills and factories that were also a part of India’s top-down development plans. Most of the sources I have found on the dam mention only the use of electricity for industry. So far, I have found just one source that even mentions the prospect of rural electrification.4

Fifty years after its construction, the Umiam Dam still stands in its ravine high in the Khasi Hills. A series of additional stages to the project have added further generating stations downhill. Despite the increased generating capacity, the Umiam project has not been able to keep up with rising demand. At times of peak power demand, particularly in the summer months, the Meghalaya state electric utility must selectively cut power. These scheduled blackouts have become a fact of life in areas served by power from Umiam Dam. The project provided power to an under-served part of India, but it could not keep up with increased demand due to population and industrial growth.

Aerial view of Umiam Reservoir in January 2010.

Aerial view of Umiam Reservoir in January 2010.

  1. Agency for International Development, Program and Project Data Related to Propose Programs – FY 1965: Near East and South Asia (Washington, DC, 1964), 84; USAID Mission to India, The United States Contribution to Indian Development (New Delhi, 1966), 34. []
  2. “Canada and the Colombo Plan: The Umtru Project,” External Affairs 9 (1957), 241-43. []
  3. Umiam Hydel Project,” Assam Tribune, January 9, 1960; “Umiam Hydel Project,” Indian Railway Gazette 62, no. 9 (1964), 239. []
  4. The source that mentions rural electrification is “State Electricity Board and Its Work,” Assam Tribune, January 9, 1960. []

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1 Comment

  1. Thanks for the info. I’m from Shillong and appreciate your effort in enlightening us on one of our important projects which has failed to live up to its potential. With the scarcity of rainfall (compared to yesteryears), power-cuts/load-shedding are the norm in winter.

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