PARRY WATERWORKS SYSTEM Raw water was taken into the system from a dug well located within the salt water pump station at the northwesterly corner of the site, adjacent to the power and distillation plant. The water from this well was brackish and was considered as salt water for distribution and use. The well was lined with precast concrete pipe four feet, six inches in diameter. Salt water pump suctions extended to a point below the draw down level of the liquid surface of the water. The salt water pump station was essentially a duplication of the Eniwetok installation, being equipped with three 300 gpm electric motor driven horizontal centrifugal pumps and one standby 300 gpm gasoline engine driven pump. Operation was automatically controlled by liquid leveis of the salt water elevated storage. The salt water distribution system consisted of a looped network of 6 inch and 4 inch pipe line covering the area upon which improvements were located. Salt water elevated storage consisted of one 1,000 barrel bolted steel tank mounted on a 50 foot wooden tower, a duplication of the in- stallation on Eniwetok Island. Original design of the distillation plant on Parry Island provided three 600 gph distillation units with space for a future unit. Increased population later required the utilization of this space by the installation of a fourth unit and the provision of additional space to accommodate eighteen portable units temporarily connected to the system. The distilled water was chlorinated before storage in surface tanks. Two 500 barrel bolted steel tanks were originally designed for surface storage of distilled water. Partly as the result of require- ments imposed relatively late in the program in connection with the photographic laboratory and the CMR Building on Parry Island, a 187,000 gallon concrete storage reservoir was later constructed to permit ac- cumulation of surplus distillation capacity for subsequent use during peak periods coincident with test operations. The fresh water pumping station was housed in the power generation and distillation building. Pumping equipment consisted of two 100 gpm electric motor driven horizontal centrifugal pumps and one standby gas engine driven pump of similar size and capacity. Pumps were controlled by liquid levels of the elevated storage tanks. The fresh water distribution system consisted essentially of 6 inch, 4 inch, and 3 inch transite pipe, and in general paralleled the salt water distribution system, Elevated fresh water storage was provided in a 500 barrel bolted steel tank mounted on the common platform of the 50 foot wooden tower, which also supported the salt water ele- vated storage tank, 5-191