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El Portal Well System Rehabilitation
Yosemite National Park » El Portal Well System Rehabilitation » Document List
There is a high risk of failure at any of these well system components. A single well failure will place excessive strain on the remaining wells to maintain system demand. Simultaneous well failure of multiple well systems will render the system unable to meet community water demands for domestic consumption and fire flow.
The purpose of this project is to provide the following corrective measures to the existing well system (wells 2, 3, 4, 5, 6, 7):
• Construction of 6' x 6' well pad and security enclosure for Wells #2, 3, 4, 5, 6, and 7. There will be 6" maximum of soil disturbance for subgrade compaction.
• Rehabilitation of Well House 4 and 5 (reroofing, interior renovation, exterior painting).
• Demolition of existing Tank #3 control building and installation of a new control building. New control building will be a 10.5' x 12' precast concrete unit and painted Wosky Brown. This work includes 6" of soil disturbance for subgrade compaction.
• Improve well system equipment including radio survey, SCADA, transmitter, RTU, and Tank 3 level sensor.
• Drill three test wells, in two locations in the El Portal Rancheria area to gauge availability of groundwater to supply an additional well (preliminary fact gathering for a potential future project). A 6' x 6' concrete well pad will be installed for each test well. Soil disturbance will be kept at a maximum depth of 6" for soil compaction.