The plan of improvement for flood control and other purposes on the Fresno County Stream Group identified as the Redbank-Fancher Creeks Flood Control Project, including the Redbank Creek Detention Basin, is hereby adopted and authorized substantially in accordance with the recommendations of the Chief of Engineers in House Document Numbered 98-147, at an estimated cost to the state of such sum as may be appropriated for state cooperation by the Legislature upon recommendation and advice of the department or Reclamation Board, except that no nonflood control application of water may occur within the Redbank Creek Detention Basin except for landscape irrigation or dust control. The preconstruction environmental assessment by the United States Army Corp of Engineers shall include the conduct of field permeability tests and consideration of the recommendations set forth in the “Evaluation Of Impacts On The THAN Site By The Proposed Redbank Creek Flood Detention Basin,” 1988, of the State Department of Health Services, Toxic Substances Control Division. Basin design criteria and operational procedures shall include, but not be limited to, the detailed post excavation soils mapping, installation and monitoring of observation wells, and creation of a contingency fund, as indicated by the environmental assessment and as required for compliance with the California Environmental Quality Act (Division 13 (commencing with Section 21000) of the Public Resources Code). If state bond act moneys are available for flood control purposes, the Legislature may appropriate those moneys for this project. This authorization shall not be deemed to confer preference on this project over the needs of other statewide programs in the appropriation of available funds. Funds shall be appropriated pursuant to this authorization only upon the act of Congress adopting and authorizing the project as substantially described in House Document Numbered 98-147. The Legislature affirms the topographical and hydrological characteristics of the Fresno County Stream Group for which provision for participation in reservoirs has been made in Section 12868 and determines that the Redbank-Fancher Creeks Flood Control Project is a project on the Fresno County Stream Group, as defined and excepted in Section 12826. The department or Reclamation Board may loan the local agency the funds necessary to pay the local portion of the costs of the lands, easements, and rights-of-way, less the credit provided by Section 12585.3. The rate of interest on the loan shall be the current rate for the Pooled Money Investment Account. The department or Reclamation Board may pay 50 percent of the nonfederal capital costs of the recreation and fish and wildlife enhancement features of the project.