LOS ANGELES (CBS) — Several “Occupy Los Angeles” demonstrators are being forced to pack up and move.

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The roughly 700 protesters and 400 tents are starting to take a toll on the lawn of City Hall.

The city’s Department of Recreation and Parks says crews haven’t been able to properly maintain nearly two acres of grass and tile walkways.

“This has been a very peaceful demonstration that’s putting stress on the grass. We’re worried now about the stress on the trees,” Jon Kirk Mukri of the Department of Recreation and Parks told CBS2.

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It could cost upward of $400,000 to replace the lawn.

Activists have also agreed to move to support the local farmer’s market, which has a permit to operate in the same area.

Officials have already spent $45,000 worth of overtime for general services.

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Eight LAPD officers have been monitoring the protest around the clock.