(A) The city adopts by reference the current North Texas Municipal Water District (“NTMWD”) Model Water Resource and Emergency Management Plan (the “Plan”), attached to Ord. 230509A as Addendum A, as if recited verbatim herein, and as may be amended from time to time by the NTMWD. The city also adopts by reference the current 2019 City of Rockwall Water Resource and Emergency Management Plan (the “Rockwall Plan”), attached to Ord. 230509A, as if recited verbatim herein. The city commits to implement the requirements and procedures set forth in the Plan and the Rockwall Plan (collectively the “Plans”) and any city modifications to such Plans. To the extent of any conflict between the Plans, the plan with the more restrictive water use shall control. Copies of the Plans shall be maintained by the City Secretary.
(B) In accordance with the Plans, the City Manager or his or her designee shall have the authority to designate, implement and terminate the stages of the Plans. The City Manager shall have the additional authority to declare and initiate Water Resource and Emergency Management Plan Stages and Measures as follows:
(1) Stage initiations.
(a) Stage 1 initiation. City water usage exceeds 75% of the daily water supply limit for two days in a seven-day period.
(b) Stage 2 initiation. City water usage exceeds 90% of the daily water supply limit for two days in a seven-day period.
(c) Stage 3 initiation. City water usage exceeds 95% of the daily water supply limit for two days in a seven-day period, or any set of conditions where it appears that the city water demand will exceed the ability of city water system or water supply.
(2) Water restrictions.
(a) During all Plan stages the restrictions listed in the Plans for “wholesale customers” shall apply to all city customers (retail and wholesale, residential and business).
(b) During Plan Stage 3 water restrictions the City Manager has authority to limit all customers to a maximum daily water usage regardless of historical water usage. Customers exceeding this maximum daily water usage limit shall be in violation of the Plans. If a customer has more than one water meter serving a lot or tract of land the combined usage of all water meters for the lot or tract shall be used to determine the customer’s usage limit.
(c) During Plan Stage 3 water restrictions, the City Manager has authority to initiate load sheading of non-critical water demand (such as irrigation meters) to prevent loss of pressure in the city water system below the mandatory 20 pounds per square inch (psi).
(d) During Plan Stage 3 water restrictions the City Manager has authority to prohibit water use for construction purposes and may declare a moratorium on all grass or landscape planting until Stage 3 is terminated.
(e) During Plan Stage 3 water restrictions, the City Manager has the authority to double the water rates for all usage rate tiers for usages over 50.000 gallons a month.