Iran has overruled critics and started filling a new dam in the parched south of the country that will drown an ancient archeological site and could threaten the tomb of Cyrus the Great.
Thousands of activists have rallied and petitioned the government not to flood the dam, which is only 7km from Pasargadae -- the first capital of the Persian Empire.
During a visit to the area earlier this month, Iranian President Mahmoud Ahmadinejad ordered the inauguration of the Sivand dam. Once operational, the dam will supply water for irrigation as well as provide hydroelectric power.
But it will also drown parts of the Tange Bolaghi area, a mountain pass with ancient settlements dating back to 5,000 BC.
And protestors are worried that increased humidity from the lake could damage the limestone tomb at Pasargadae of King Cyrus the Great, who founded the Achaemenid empire in the sixth century BC.
Cyrus remains a revered figure for Iranians as the conqueror of the ancient Mesopotamian city of Babylon and author of the Cyrus Cylinder, a declaration in cuneiform seen by some as the world's first assertion of human rights.
His tomb is an imposing construction rising 10m amid the ruins of the ancient capital with a base of six monumental stone steps leading up to his mausoleum.
Nobel peace laureate Shirin Ebadi and fellow human rights lawyer Mohammad Ali Dadkhah have lodged a complaint on behalf of 3,000 Iranians against Cultural Heritage Organization (CHO) head Esfandyar Rahim Mashai and Iranian Energy Minister Parviz Fattah.
"We demand that the flooding be immediately halted but despite the sensitivity of the issue the court has not taken a decision yet," Dadkhah said.
"We have expert studies and documents that prove the dam will drastically change the ecology of the region and damage the tomb when flooded," he said.
"We have to choose wisely between flooding a dam which is useful for a limited period and cultural heritage that links the past, present and future of this land," Dadkhah said.
The lawyer won two lawsuits last year to prevent damage to sites in the historic city of Isfahan, which raised concern that the authorities were not paying enough attention to Iran's ancient heritage.
These involved the construction of a tall building in Naqsh-e Jahan Square, which was reduced by several floors, and a subway route under historic Chahar Bagh Street.
The conservative government has rejected any criticism that it is less than attentive to Iran's pre-Islamic past in Isfahan, Pasargadae or eleswhere. It insists that flooding the dam will stop the moment there is any proof of a risk to Pasargadae, and points to the importance of its completion for the local community.
The lake produced by the dam will be 11km long and will hold 92 million cubic meters of water, increasing the amount of fertile land in the region by 9,000 hectares.
The authorities are also hoping the water from the dam will help local communities stem a salination process that has put 28,000 hectares of farmland in jeopardy.
Pasargadae lies 50km from the former Achaemenid capital Perseopolis, Iran's best known ancient site.
It will take up to a year to fully flood the dam, and the CHO says it could be halted if experts proved humidity posed a threat to the nearby sites.
"We have invited foreign specialists to join our own people currently working at the site and we hope to have enough data within a few months to decide whether flooding should stop," CHO research chief Taha Hashemi said.
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