Laserfiche WebLink
mark up Drought Contingency Plan- La Porte June 2011 Updatedoc (2) ` : • _ <br /> f Formatted: Highlight <br /> In addition, each entity has the ability to supply its entire water supply through groundwater <br /> production from wells. After 1990, the Harris- Galveston Coastal Subsidence District decreed <br /> that no more than ten per cent (10 %) of each entity's yearly water production can be produced <br /> from groundwater. Although additional pumping capacity is planned for peak purposes, <br /> groundwater production will be utilized for peaking purposes whenever possible. <br /> Temporary reductions or disruptions in surface water supply can be offset by increased <br /> groundwater withdrawals. Careful monitoring and management of groundwater withdrawal <br /> is necessary to avoid exceeding the yearly ten per cent (10 %) limit above. <br /> Long -term reductions or disruptions in surface water supply would require special permission <br /> from the Subsidence District to exceed allowable groundwater withdrawal. It is anticipated <br /> that conservation measures would be required by the District to allow increased groundwater <br /> withdrawal. <br /> C. TRIGGER CONDITIONS <br /> Production amounts are based on a seven (7) day average daily demand, and include the <br /> permitted withdrawal of groundwater. <br /> 1. Mild Conditions: <br /> a. Surface water demand approaching 6,933,000 gallons /day (80% of the pumping <br /> capacity owned by the Authority at the Southeast Water Purification Plant plus <br /> allowed groundwater withdrawal). <br /> Or, <br /> b. Production at the Southeast Water Purification Plant reduced to a point such that <br /> the aggregate surface water demand of the Authority is 80% of the reduced <br /> pumping capacity. <br /> 2. Moderate Conditions <br /> a. Surface water demand approaching 7,799,000 gallons /day (90% of the pumping <br /> capacity owned by the Authority at the Southeast Water Purification Plant plus <br /> allowed groundwater withdrawal). <br /> Or, <br /> b. Production at the Southeast Water Purification Plant reduced to a point that the <br /> aggregate demand of the Authority is 90% of the reduced pumping capacity. <br /> 3. Severe Conditions <br /> a. Surface water demand approaching 8,666,000 gallons /day (100% of the pumping <br /> capacity owned by the Authority at the Southeast Water Purification Plant plus <br /> allowed groundwater withdrawal). <br /> Or, <br /> Page 2 of 5 <br />