Given the task definition and input, reply with output. In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

Passage: The Army presence at Oak Ridge increased in August 1943 when Nichols replaced Marshall as head of the Manhattan Engineer District. One of his first tasks was to move the district headquarters to Oak Ridge, although the name of the district did not change. In September 1943 the administration of community facilities was outsourced to Turner Construction Company through a subsidiary, the Roane-Anderson Company. The company was paid a fee of $25,000 per month on a cost-plus contract, about 1 percent of the $2.8 million monthly cost of running the town facilities. Roane-Anderson did not take over everything at once, and a phased takeover started with Laundry No. 1 on 17 October 1943; transportation and garbage collection soon followed. It assumed responsibility for water and sewage in November, and electricity in January 1944. The number of Roane-Anderson workers peaked at around 10,500 in February 1945, including concessionaires and subcontractors. Thereafter, numbers declined to 2,905 direct employees and 3,663 concessionaires and subcontractors when the Manhattan Project ended on 31 December 1946.By mid-1943, it had become clear that the initial estimates of the size of the town had been too low, and a second phase of construction was required. Plans now called for a town of 42,000 people. Work began in the fall of 1943, and continued into the late summer of 1944. Hospitals were expanded, as were the police and fire services, and the telephone system. Only 4,793 of a planned total of 6,000 family houses were built, mostly on the East Town area and the undeveloped stretch along State Route 61. They were supplemented by 55 new dormitories, 2,089 trailers, 391 hutments, a cantonment area of 84 hutments and 42 barracks. Some 2,823 of the family units were prefabricated off-site. The high school was expanded to cater for 1,000 students. Two additional primary schools were built, and existing ones were expanded so that they could accommodate 7,000 students.
What was supplemented by 55 new dormitories, 2,089 trailers, 391 hutments, a cantonment area of 84 hutments and 42 barracks? ?