Texas Water Code - WATER § 11.145. When Construction Must Begin

(a) If a permit is for appropriation by direct diversion, construction of the proposed facilities shall begin within the time fixed by the commission, which shall not exceed two years after the date the permit is issued.  The appropriator shall work diligently and continuously to the completion of the construction.  The commission may, by entering an order of record, extend the time for beginning construction.  The commission may establish fees, not to exceed $1,000, for extending the time to begin construction of the proposed facilities.

(b) If the permit contemplates construction of a storage reservoir, construction shall begin within the time fixed by the commission, not to exceed two years after the date the permit is issued.  The commission, by entering an order of record, may extend the time for beginning construction.  The commission may fix fees, not to exceed $1,000, for extending the time to begin construction of reservoirs.