Information from Find a Grave: The Clark County Poor Farm Cemetery is located on Washington State Experimental Facility property. The County maintains the cemetery grounds. It was also known as Marble Mount Cemetery. The property is posted "keep out". Anyone interested in viewing the cemetery should first get permission from the office at the experimental facility or Clark County. Because the graves were of the county's poor, their markers were only metal placards, which have long since been lost, damaged, or stolen by vandals.