The jurisdiction of the park and recreation board over the White Rock Lake property and the Bachman's Dam property shall be subject to the primary right of Dallas Water Utilities to utilize it for waterworks purposes and the park and recreation board shall in no way interfere with the exercise of the right in the event that it becomes expedient and necessary to again devote those properties for the use of waterworks purposes. Any building on the respective sites owned and operated by Dallas Water Utilities shall continue to be at the disposal of Dallas Water Utilities at all times. (Ord. Nos. 8018; 32407)