YOSE Rehabilitate the Sewer System at the Mather Ranger Station and Housing Area to Prevent Failures

The proposed project will replace both sewer systems at the Hetch Hetchy Entrance Station, combining their flow into a single system. The new system will collect wastewater from both Building 2000 and the tent cabin area and convey it by gravity to new septic and dosing tanks, from which the liquid effluent will be pumped to a new leach field located in a clearing a few hundred feet east of the tent cabins. Proposed upgrades include an estimated 100 LF of 4” HDPE collection lines, 500 LF of 6” H