In 1985, the Indonesian government announced plans for a new reservoir in Central Java that would generate 22.5 megawatts of hydroelectric power and supply water to 70 hectares of rice fields in the surrounding lowlands. The price tag was staggering: USD 156 million from the World Bank, USD 25.2 million from the Japan Export-Import Bank, and additional funds from the national budget. The dam would sit at the confluence of the Serang River and the Uter River, on the border of three regencies -- Grobogan, Sragen, and Boyolali -- in the green, hilly interior of Central Java. Construction ran from 1985 to 1989. On paper, the numbers made sense. In the villages along those rivers, they did not.

Resistance to the dam was immediate and sustained. Villagers who faced displacement rejected the compensation offered as inadequate, and those who accepted resettlement found conditions far worse than what they had left behind. The resettlement land, they said, could not be farmed, had no clean water, and was nearly impossible to reach. Over 1,500 families refused to move. Student groups, including the Kedung Ombo Construction Victims Solidarity Group, drew media attention to the villagers' complaints and built public support. International NGOs brought the case before the World Bank itself, securing an aide-memoire that pressured the government to address the grievances. The government, bound by construction deadlines tied to the Japanese loan, pushed back -- curtailing NGO activity, restricting media access, and pressuring residents to accept terms and leave. As a partial concession, authorities permitted families to continue farming greenbelt areas and tidal lands around the reservoir's edges, a measure that eased some suffering without addressing the underlying injustice.

The villagers who remained took their case to court. In 1993, the Indonesian Supreme Court awarded 9 billion rupiah -- approximately USD 3.9 million -- to thirty-four households for the destruction of their land, buildings, and crops. It was a landmark ruling, one of the few times ordinary Javanese farmers had successfully challenged a New Order development project in court. The victory lasted one year. After the government protested, the Supreme Court reversed itself in 1994 and revoked its own decision. The families who had held out for nearly a decade, who had survived flooding and intimidation and displacement, were left with nothing. The reservoir, meanwhile, continued to fill. President Soeharto inaugurated it on May 18, 1991, while the legal battle was still unfolding.

Today, the Kedung Ombo reservoir covers approximately 6,576 hectares -- 2,830 hectares of water surface and 3,746 hectares of surrounding land. Its normal volume holds 723 million cubic meters of water, fed by the Serang River and several tributaries including the Braholo, Nglanji, Tapen, and Sambas rivers. Three weirs along the Kali Serang distribute water to agricultural land in Grobogan, Demak, Kudus, Pati, and Jepara regencies, irrigating more than 60,000 hectares of rice paddies. The reservoir also generates hydroelectric power, supports a fishery, provides flood control for downstream communities, and has become a modest tourist destination. From the air, it appears as a broad, irregular lake filling the contours of the valleys it drowned, its edges fringed with green where farmers work the tidal margins -- some of them descendants of the families who once owned the land beneath the waterline.

Kedung Ombo became one of the defining cases in Indonesian development politics, a story that crystallized the tensions between centralized modernization and local rights during the Soeharto era. International development organizations cited it for years as an example of what can go wrong when dam construction prioritizes engineering timelines over human consequences. The villagers' resistance -- their refusal to leave, their willingness to live in trees and on rafts rather than accept terms they considered unjust -- became a reference point for rural advocacy movements across Indonesia. The Supreme Court's reversal, meanwhile, demonstrated the limits of legal recourse under authoritarian governance. The water in the reservoir is still doing what it was designed to do: irrigating fields, generating power, controlling floods. Beneath its surface, the foundations of 37 villages remain.