The 10 million gallon reservoir was put into service in 1991. This is an underground reservoir consisting of only one cell. Finished water runs from the Little Cottonwood Water Treatment Plant through the Salt Lake Aqueduct into this reservoir. From there it continues through the Salt Lake Aqueduct to Terminal Reservoir. The 10 MG reservoir provides Salt Lake City with needed fire protection for the south end of their distribution system and increases storage capacity.