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Based on the City of Llano’s Water Conservation and Drought Contingency Plan, effective immediately we are moving to Stage 3 of mandatory water restrictions as defined in the Plan. If you have any questions or need more information about the watering restrictions for Stage 3, please visit the City of Llano’s website or contact the office at 325-248-4158 ext. 101.
Discharge information for the Llano River at Junction and the Llano River at Mason can be utilized to predict in March that the City of Llano is very likely to reach at least Stage 3 in this Drought Plan. Based on an analysis of historical monthly flow data for the Junction and Mason gauges, the following guidelines can be used to predict Stage 3 drought conditions: If 1) the average February monthly flow for Junction is 75 cfs or less; or 2) the average of the monthly flows from August to February at Junction is 85 cfs or less; or 3) the average February monthly flow for Mason is 130 cfs or less, than it can be predicted that the 7-day moving average daily discharge of the Llano River at Llano will be 21 cfs or less during the coming summer.
The utilization of these guidelines since 1940 would have correctly predicted 17 of 19 low-flow (21 cfs or less) events for the Llano River at Llano, with no false predictions. The low-flow conditions of 1985 would not have been predicted due to high flows in December. It is not determined why the low-flow conditions of 1967 would not have been predicted.
If it becomes apparent from this predictive scenario, or from other observations, that Severe Water Shortage Conditions are likely to occur, the following is recommended:
LCRA or USGS be requested to calibrate the Llano River at Llano and Llano River at Mason, Texas stream flow gauge to ensure its accuracy.
The Emergency Water Shortage Plan (to be prepared) be evaluated to ensure that all planning options are available as needed.
Requirements for Initiation:
Customers shall be required to comply with the requirements and restrictions on certain non-essential water uses for Stage 3 of this Ordinance when:
If Stage 2 has not been initiated, the Stage 3 requirements for initiation shall initiate Stage 2 restrictions for 7 days prior to initiating Stage 3. If the Stage 3 pumpage goal can be met within those 7 days, Stage 2 restrictions remain in effect until both requirements for initiation of this section are met.
2. The Goal for Stage 2 cannot be met under Stage 2 Restriction.
Requirements for Termination:
Stage 3 of the Ordinance may be rescinded when the average daily discharge of the Llano River at Llano exceeds 75 cfs for seven (7) consecutive days or 150 cfs for five (5) consecutive days. The Mayor or City Manager may rescind Stage 3 of this Ordinance at any time. Upon termination of Stage 3, Stage 2 becomes operative. Important Note: Care should be exercised not to move from Stage 3 to Stage 1, just because the discharge of the River exceeds 150 cfs for 5 days. Discharge data should be evaluated to ensure that discharge levels are stabilizing or increasing before Stage 2 is repealed. When base flows are low, the River can quickly return to Stage 3 levels, even after a significant rainfall event that produces large discharge volumes.
Goal: Limit the daily pumpage at the water treatment plant to 0.8 million gallons per day.
Water Use Restrictions: All requirements of Stage 2 shall remain in effect during Stage 3 except:
Even Addresses Thursday and/or SundayOdd Addresses Wednesday and/or Saturday
Commercial, Recreational, Multi-Family Tuesday and/or Friday
Hose-end Sprinklers or Sprinkler Systems
Addresses Ending in Allowed Day
0,2 or 4 Sunday
1 or 3 Saturday
Commercial, Multi-family even address Tuesday
Commercial, Multi-Family odd address Friday
The watering of greens on an as need basis is limited to between the hours of 6:00 AM and 10:00 AM and between 8:00 PM and 12:00 Midnight by sprinkler system; and hand-held hose between the hours of 10:00 AM and 8:00 PM.