Pacific municipalities . arded inevery way, not spasmodically, as issometimes the case, but systematicallyand Water sanitation problems in Califor-nia, particularly in the more arid regions,differ materially from the problems inother sections of the United States. The supplies consist mainly of reser-voired waters, replenished by a fewmonths winter flow of streams and re-maining stagnant for the balance of theyear, and it sometimes happens thatthere is no fresh in flow to amount toanything for several years. At thesame time, the temperatures of thewaters are high, giving ideal c
Pacific municipalities . arded inevery way, not spasmodically, as issometimes the case, but systematicallyand Water sanitation problems in Califor-nia, particularly in the more arid regions,differ materially from the problems inother sections of the United States. The supplies consist mainly of reser-voired waters, replenished by a fewmonths winter flow of streams and re-maining stagnant for the balance of theyear, and it sometimes happens thatthere is no fresh in flow to amount toanything for several years. At thesame time, the temperatures of thewaters are high, giving ideal conditionsfor the growth of foul weeds and pollut-ing organisms of many kinds. SAN DIEGOS WATER SUPPLY The water supply of San Diego is atypical illustration of Southern Califor-nia conditions. It also affords an ex-cellent illustration of systematicsanitarywork. The water supply has its source in alabyrinth of granite mountains 60 milesdistant, having an elevation of from three rO OH> > en> oo > Hpi ?< 2. 100 PACIFIC MUNICIPALITIES to four thousand feet, offering a splen-did and almost uninhabited watershed. The Morena Dam, the most distantand lying at the highest altitude ofmore than 3600 feet, is being built toimpound water at the 150 foot contourand is designed for an added height of514 feet. It is now finished to theheight of about 100 feet. The 150 footcontour will give a capacity of 15,000,-000,000 gallons and the added heightwill give a capacity of 17,500,000,000 gals. Barrett Dam, the foundations of whichhave been put in, has been designed tohave a height of 175 feet and will im-pound 15,000,000,000 gallons of a short distance above the BarrettDam at the junction of the Pine andCottonwood Creeks, a cement-lined con-duit extends for miles Dulzura,where the water is emptied into DulzuraCreek and then into Jamul Creek andthence to Lower Otay Reservoir, 12 milesfrom the end of the conduit. This conduit, like the Morena Dam,ranks among the gre
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