Within the boundaries of the 17.2-ha property are located all the elements necessary to express the Outstanding Universal Value of Sewell Mining Town, including 38 percent of the housing and 80 percent of the industrial buildings that constituted the town at the time of its maximum development. These buildings form the central core of the town as it was configured by the mid 20th century. The property includes all the construction typologies historically located here except for the detached single-family houses of the American inhabitants, all of which have been destroyed. The pedestrian circulation system, public spaces and service infrastructure are intact and remain operational. The property does not suffer from adverse effects of development or neglect.
The property (which is surrounded by a 33-ha buffer zone) is within a mining exploitation area, so access is controlled; tour visits are limited, and undertaken only under the supervision of authorized operators. Because of this provision, the property does not suffer from looting and does not face undue tourism pressure.