WSP11068 - Laserfiche WebLink

Home Browse Search

'(.~ '~ s METROPOLITAN WATER DISTRICT cent in excess of the design capacity of 85 cubic feet per second, Gradual decrease of capacity was observed subsequently, until by midsummer of 1948 the loss amounted to about 8 per cent of the initial capacity. The cause was traced to organic growth on the interior pipe surfaces. and to remedy the condition a chlorination station was designed for installation at the outlet of the San Jacinto reservoir where the aqueduct flow is regulated, Chlorination by means of this permanent installation was begun in October 1948, and within several month.s most of the lost capacity had been restored. In order to check the accuracy of registration of the San Jacinto reservoir outlet venturi meter, flow tests were conducted utilizing the salt-velocity method, in which a salt solution is injected into the flow and the time of its arrival at a point downstream is determined by measurement of electrical conductivity of the water, The work was done in collaboration with Mr, Fred C, Scobey, senior irrigation engineer, U, S, Department of Ag,';culture, and an engi- neer of the U. S. Bureau of Reclamation, The meter was found to have an accuracy within the specified tolerance of plus or minus two per cent. Initially, all water diverted through the San Diego aqueduct was transported to the San Vicente reservoir of the City of San Diego. Subsequently. service was established to Fallbrook Public Utility District, a component of San Diego County Water Authority, and aqueduct water was delivered directly into distributing mains in the Fallbrook area, To prevent fish from leaving the reservoir in the outflow, an electrical fish screen assembly was designed for installation at the reservoir outlet, MiscellalleoH-s d-istdbuf--io1l- sljstem e;tt.e1/si01/S Plans were prepared and equipment procured for sen'ice connec- tions from the upper feeder to the Pasadena water system at the city's Hastings reservoir site near the easterl,' city limits, and at West Drive near the Arroyo Seco crossing; also for a service conuection from the Orange Count,\' feeder to the Corona del Mar reservoirs of the City of Newport Beach, now a part of Coastal Municipal Water District through annexation in Novembe,' 1948, The N e,vport Rp~(,'h connection ".."as under construction at the end of the fiscal year. The Pasadena tUl"Ilout at West Drive was partially constructed during the upper feede,' shutdown in March 1949. The Hastings reservoir connection will be installed concur- ,: I I J I