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Item 4G Item 4G Ordinance No. 662-C; Revise the City of Southlake’s Drought Contingency Plan Water Conservation and Drought Contingency Planning Potential Problems High demands pumping capacity reaches it limits. water customers demand > pumping capability probability of emptying EST tanks pressure drop in the city’s water system. State regulations, Pressure drop < 20 pounds psi Mandatory Issuance of “Boil Water Notice”. need to build “Local Triggers” into Drought Contingency Plan Water Conservation and Drought Contingency Planning 1997 - State adopted regulations water systems > 3,300 connection adopt Water Conservation and Drought Contingency Plans (DCP) Wholesale purchase from Ft. Worth Contract terms - require wholesale customers Drought Contingency Plan At minimum, restrictive as the City of Ft. Worth’s DCP Water Conservation and Drought Contingency Planning Southlake’s Drought Contingency Plan adopted in August, 1996 Revised in January, 2006 (Ord. 622-B) mirrors the Ft. Worth plan “triggers” or conditions which warrant the various stages of conservation measures to take effect all refer to Ft. Worth’s treatment capacity and the Tarrant Regional Water Districts reservoir capacity Water Conservation and Drought Contingency Planning Current DC Plan does not address specific local water system limitations limit our ability to meet peak demands Causes: Heavy demand Peak demand – Early a.m. Drought conditions Drought Contingency Planning The two limiting factors in our water systems are the pumping capacity and the elevated storage tank capacity Drought Contingency Planning This chart of elevated storage tank levels shows the diurnal water demand for a 4 day period in August 2006 Water Conservation and Drought Contingency Planning Must maintain sufficient levels of water in the elevated storage tanks fire protection and domestic use, Therefore, Necessary to limit outdoor irrigation when local water demand causes tower levels to reach critical levels Current and Proposed Stages Stage 1 – Dry Conditions Stage 2 – Water Watch Stage 3 – Water Warning Stage 4 – Emergency Water Management Water Conservation and Drought Contingency Planning Stage 1 – Dry Conditions Normal conservation measures on a voluntary basis Voluntary lawn and golf course fairway irrigation recommended once every 5 days with no watering allowed between 10 a.m. and 6 p.m. Water Conservation and Drought Contingency Planning Stage 2 – Water Watch Trigger: Water level in 3 elevated storage tanks falls below 18’ for three consecutive days with the Pearson pump station operating at 100% capacity Mandatory - Landscape irrigation restricted to once every 5 days Mandatory - No hosing off of pavement, buildings or windows Mandatory - Vehicle washing restricted to commercial facilities only Use of water from Fire Hydrants restricted to fire fighting and uses necessary to maintain public health, safety and welfare Water Conservation and Drought Contingency Planning Stage 3 – Water Warning Trigger: With the Stage 2 restrictions in place for at least 2 weeks, the water level in 3 elevated storage tanks fall below 18’ for three consecutive days with the Pearson pump station operating at 100% capacity All Stage 2 restrictions plus the following restrictions apply: Mandatory - No operation of ornamental fountains Mandatory - No draining, filling, refilling or adding water to pools or jacuzzi type pools Mandatory - No foundation watering except by hand held hose and only then on the 5 day watering cycle Mandatory - Any action allowing water to run onto pavement or otherwise wasting water Water Conservation and Drought Contingency Planning Stage 4 – Emergency Water Use Management Triggers: With the Stage 3 restrictions in place for at least 2 weeks water level in 3 elevated storage tanks fall below 12’ for three consecutive days with the Pearson pump station operating at 100% capacity and/or malfunction or breakdown of a water system component (pump, storage tank, or supply line) which severely limits the City’s ability to provide water and/or At the discretion of the Director of Public Works Water Conservation and Drought Contingency Planning Stage 4 – Emergency Water Use Management All Stage 2 and 3 restrictions plus the following restrictions apply: NO IRRIGATION No installation of new landscaping Water Conservation and Drought Contingency Planning SUMMARY Required by State Required by Fort Worth Addition of Local Triggers High Demand caused Equipment Malfunction No Action = Potential Increase of Water outage Changes Hypothetical- Proposed Ordinance In effect last Summer Stage 2 Trigger – July 14, 2006 Remained in effect until 9/30/06 Proposed Ordinance Language If conditions warrant, stand-down from Stages 2, 3 or 4 is available to DPW Water Conservation and Drought Contingency Planning Questions? Contact Bob Price (817) 748-8097