Protesters against the Camp Humphreys expansion have once again violently clashed against the riot police after government hired construction workers moved in to close the irrigation canals that direct water towards the rice paddies. The Donga Ilbo has particularly good coverage of the chaos:
On the day of the confrontation, the area around the Camp Humphreys relocation site resembled a virtual battleground. Four hundred local farmers adamantly refused to leave and cried out that the land belongs to them. The Defense Ministry, too, stood firm and said that illegal farming in those areas will further push back the date of the U.S. military base relocation.
Faced with such fierce resistance, the Defense Ministry decided to cut off three waterways going into the contested farmland in Shindae-ri, Hamjeong-ri and Dodu-ri. Without the water from Anseong Stream provided by the three canals, farming is literally impossible in the 2.85 million-pyeong lands.
Here is a picture of the chaos from the Korea Times:

The protest is on the left and on the right are girls visiting a US military installation on the same day.
This is one of the popular claims of why the protesters are refusing to leave:
The holdout residents complainingly point out, ¿The compensation from the government is about 140,000 won per pyeong. But land price in neighboring areas, which do not belong to the relocation plan, is 200,000 to 300,000 won per pyeong. We don¿t want to leave the place where we have lived generation after generation.¿
The Defense Ministry, however, responds with, ¿The ministry has offered a variety of options, but it¿s the local residents who reject them. It is the `anti-American military presence¿ outsiders who cause a stir among the locals most of the time.¿
The 200,000 to 300,000 won per pyeong price the anti-US hate groups keep quoting is the price of the land after the relocation was announced. With more soldiers and investment dollars moving into the Camp Humphreys area; of course land value is going to rise. The government is offering them what the price of their land was worth before the relocation was announced. These hate groups are using the farmers to promote their anti-US agenda while the farmers are using the hate groups in order to advance their claims to more compensation money. It is right now a marriage of convenience between the farmers and the hate groups, but it could crumble if the Korean government offers more money to the farmers. However, if they do that than it could start a bad precedence for the Korean government because every time the government needs to move someone they will also react violently in order to gain more money.
The Joong Ang Ilbo has come out strongly against the protesters:
The real reason that such clashes occurred was the intervention of anti-American organizations that are trying to force out the U.S. forces that are stationed on the peninsula. These groups are turning a blind eye to our security situation. They don’t care that two huge armies are perched in a face-off on the inter-Korean border. Nor does it help to point out Korea’s tense geopolitical location – being stuck between China and Japan – which could erupt into an open conflict at any time. Like parrots, they repeat what the North preaches: Namely, that peace will come only after the withdrawal of U.S. forces or that the country’s reunification is being prevented by the United States.
Some of them changed their place of residence to Pyeongtaek after the area was chosen to house the relocated military installations, in order to more easily stir up trouble in the town. Villages are being plastered with anti-American slogans and pictures. They have brainwashed citizens with ridiculous arguments that the relocation of the military installations is part of a plan to foster a war, which will obliterate Pyeongtaek when it happens. As a result, many citizens, especially old people, are being turned against the relocation, defense ministry officials say.
The anti-US hate groups are experts at manipulating people just like their idols in North Korea are masters at manipulating South Korean politicians. You would think the government would be tired of these small scale riots all the time and just lock these people up and seal the place off once and for all to complete the project. The Camp Humphreys expansion is really turning into a true test to see what the South Korean governments commitment to the US-ROK alliance really is. If the Camp Humphreys expansion fails, it will signal the end of the US-ROK alliance.