; (2) incentives to the District for the establishment of a water leasing program from willing lessors for agricultural producers and irrigators in the District to temporarily lease pre-1907 water rights (instead of permanent severance from irrigable lands) for the purpose of providing benefits to species listed under the Endangered Species Act of 1973 ( 16 U.S.C. 1531 et seq.) and other river ecosystem benefits; and (3) cost-share assistance to the District to implement infrastructure or operational changes that will allow for effective management of a leasing program, while maintaining adequate water deliveries to other agricultural producers and irrigators. 4. Water conservation (a) In general The Secretary, in cooperation with the District and in consultation with the Pueblos, may provide funding and technical assistance for the installation of metering and measurement devices and the construction of check structures on irrigation diversions, canals, laterals, ditches, and drains— (1) to ensure the conservation and efficient use of water within the District by— (A) reducing actual consumptive use; or (B) not increasing the use of water; and (2) to improve the measurement and allocation of water acquired through the water acquisition program established under section 3. (b) Rio Grande, San Acacia and Isleta reaches (1) In general The Secretary shall provide for development of a comprehensive plan for the San Acacia and Isleta reaches to plan, design, construct and prioritize projects that balance river maintenance, water availability, use, and delivery, and ecosystem benefits, including— (A) planning, permitting, and construction of a pumping station at Bosque del Apache National Wildlife Refuge for the purpose of more efficiently using water to provide— (i) a stable supply for the refuge; and (ii) an efficient and reliable supply of water to the Rio Grande for the benefit of the endangered silvery minnow and Southwestern willow flycatcher