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.-.r-,. : /=--.~ ~ . iC' 1/'-.. . . ) .In 1979 the District installed an infiltration gallery beneath the Little Thomp- son River at its property at the southwest corner of the intersection of the River and Cree Court, which would become its main water treatment site. The water received from the infIltration gallery was treated and delivered to the distribution system which eventually required three separate pressure zones to serve the community as development progressed throughout the area which varied some 600 feet in 'elevation.In addition to 'the supply from the River, . certain wells remained on line, also. . In 1993,' the District constructed anew treatment facilitY at the Cree Court 'site which provided filtration, pH. control, and disinfection. The filtration was ac-', j complishedwith pressurized' miXed media filters Using liquid alum as the c0- agulating . agent In anticipation of stricter turbidity removal regulations, the District replaced these filters in 2000 with an advanced inicro-filtration system which did not require alum, and produced a higher degree of turbidity remo- val, and is the. system in place today. ' . . C) CONDITION OF 'FACILITmS ***************************** 1) ,Primary sup-ply from the Littl~ Thompson River The'infiltration gallery which lies beneath tl;J.e Little Thompson River has. been subjected to some shock loading this past year as a reSult of the River being loaded with ash from the fires in the Big Elk area , which is appro~tely 7 miles up stream from Pinewood Springs. Though the fIres. occurred in the summer of 2002, the resultant ash laid dormant on the ground for many months after since there was also a major drought in the area and there was no precipitation .to create a normal surface run-off. The thaw follOwing an un- usually heavY bH7.7.ard early in 2003, however, resulted in a m~jor surface run-off-throughout the basin through which the River flows, resulting in a significant surge of ash being carried into the River.This ash eventually made it downstream to the District's infiltration gallery, causing its severe plugging, and contamination of.the micro-filtration membranes used in the treatment process, and the eventual shutting down of the water treatment plant to allow the surge of ash to subside. TestS have recently been done of .the infIltration gallery to determine the ex- tent of what damage may have occure~ if any, and possible remedial action. With periodic air backwashes of the gallery the plant Operator has managed to . continue treating water to meet the system needs. The existing micro-filtration equipment is a Memcor Mode16M10-C manu- factured by the U.S. Filter Company, with the folloWing production rates: 5