Urban Water Management Plan 2015

• Leaks – To mitigate the effect of leaks cause by a large-scale earthquake, the City plans on increasing system disinfectant residuals, determining leak locations and performing temporary repairs, prioritizing and completing repairs based on system population affected by leaking pipe, and disinfection of repairs. • Lower Pressure or Service Interruption – To mitigate the effect of low pressure or service interruption caused by a large-scale earthquake, the City plans on doing the following: o Isolate areas with service interruptions to prevent contamination of still functioning parts of the system. o Notify customers that water is no longer available in the areas with service interruptions. o Issue boil water orders in areas with compromised water systems. o Notify customers of locations in the City where they can get clean and safe water o Install jumper systems as appropriate. o Increase disinfectant residuals as a precaution against potential contamination. • Loss of Water Production Capability – The City has fourteen water production wells so failures at some of the wells can be tolerated without completely losing production capacity. The City would implement emergency water use restriction per its adopted Water Shortage Contingency Plan to manage the available supply. The City has no potable water interties with other water purveyors. In the event of a complete loss of well production capacity the City would be reliant on water deliveries via truck or similar transport mechanism. 8.9 MINIMUM SUPPLY NEXT THREE YEARS Table 8-4 summarizes the estimated minimum supply available during the next three water years (2016, 2017, and 2018) and is based on the available supply during the first multiple dry hydrologic water year, as discussed in section 7.3.

Table 8-4 Minimum Supply Next Three Years

2016

2017

2018

(AF)

(AF)

(AF)

Available Water Supply

60,705

60,705

60,705

August 2016

8-12

City of Morgan Hill 2015 Urban Water Management Plan