California Senate Bill SB1259 Amended / Bill

 BILL NUMBER: SB 1259AMENDED BILL TEXT AMENDED IN SENATE MAY 5, 2014 AMENDED IN SENATE APRIL 3, 2014 INTRODUCED BY Senator Pavley  (   Principal coauthor:   Senator   Cannella   )   (   Coauthor:   Senator   Wolk   )  FEBRUARY 21, 2014 An act to amend Sections 6120 and 10004.6 of the Water Code, relating to water. LEGISLATIVE COUNSEL'S DIGEST SB 1259, as amended, Pavley. Dams:  siltation   sedimentation  studies. Existing law requires the Department of Water Resources to make or cause to be made investigations and gather or cause to be gathered data as needed for a proper review and study of the various features of the design and construction of dams, reservoirs, and appurtenances. This bill would require the department, in collaboration with specified entities, to make or cause to be made investigations and to gather or cause to be gathered data for a proper review and study of the loss of storage capacity behind dams resulting from  siltation   sedimentation  . The bill would require results of the  siltation   sedimentation  study to be reflected in the quinquennial update of the California Water Plan and be provided to the appropriate policy committees of the Senate and the Assembly. The bill would require that an initial study be completed by January 1, 2017, and that a  siltation   sedimentation  study include an evaluation of cost-effective strategies for sediment removal, relative to the costs of alternative methods of flood protection and water supply. Existing law requires the Department of Water Resources to update the California Water Plan, which is a plan for the conservation, development, and use of the water resources of the state, every 5 years. Existing law requires the department, as part of the update, to conduct a study to determine the amount of water needed to meet the state's future needs. The department is required, one year prior to issuing each update to the California Water Plan, to release a draft of assumptions and estimates upon which the study will be based. Existing law prescribes a list of subjects for which the department is required to release those assumptions and estimates. This bill would add estimated loss of storage capacity behind dams resulting from  siltation   sedimentation  to that list. Vote: majority. Appropriation: no. Fiscal committee: yes. State-mandated local program: no. THE PEOPLE OF THE STATE OF CALIFORNIA DO ENACT AS FOLLOWS: SECTION 1. Section 6120 of the Water Code is amended to read: 6120. (a) For the purpose of enabling it to make decisions as compatible with economy and public safety as possible, the department shall make or cause to be made investigations and shall gather or cause to be gathered data as may be needed for a proper review and study of the various features of the design and construction of dams, reservoirs, and appurtenances. (b) (1) The department shall further make or cause to be made investigations and shall gather or cause to be gathered data as may be needed for a proper review and study of the loss of storage capacity behind dams resulting from  siltation   sedimentation  . The results of the  siltation   sedimentation  study shall be reflected in the quinquennial update of the California Water Plan developed pursuant to Chapter 1 (commencing with Section 10004) of Part 1.5 of Division 6 and shall be provided to the appropriate policy committees of the Senate and Assembly. (2) An initial  siltation   sedimentation  study shall be completed by January 1, 2017. (3) A  siltation   sedimentation  study may be based upon all of the following: (A) A compilation of published and unpublished sedimentation data from dam operators and other sources. (B) Original reservoir surveys at reservoirs lacking sedimentation data. (C) An evaluation and characterization of sediment for mercury and sediment grain size. (D) Modeling, including techniques such as geographic information system-based reservoir sedimentation modeling. (4) A  siltation   sedimentation  study shall include an evaluation of cost-effective strategies for sediment removal, relative to the costs of alternative methods of flood protection and water supply, including the costs of constructing new dams and reservoirs. (5) In designing and conducting a  siltation   sedimentation study, the department shall collaborate with the United States Bureau of Reclamation, the United States Army Corps of Engineers, the United States Geological Survey, and the Delta Independent Science Board. SEC. 2. Section 10004.6 of the Water Code is amended to read: 10004.6. (a) As part of updating The California Water Plan every five years pursuant to subdivision (b) of Section 10004, the department shall conduct a study to determine the amount of water needed to meet the state's future needs and to recommend programs, policies, and facilities to meet those needs. (b) The department shall consult with the advisory committee established pursuant to subdivision (b) of Section 10004 in carrying out this section. (c) One year before issuing each update to The California Water Plan, the department shall release a preliminary draft of the assumptions and other estimates upon which the study will be based, to interested persons and entities throughout the state for their review and comments. The department shall provide these persons and entities an opportunity to present written or oral comments on the preliminary draft. The department shall consider these documents when adopting the final assumptions and estimates for the study. For the purpose of carrying out this subdivision, the department shall release, at a minimum, assumptions and other estimates relating to all of the following: (1) Basin hydrology, including annual rainfall, estimated unimpaired streamflow, depletions, and consumptive uses. (2) Groundwater supplies, including estimates of sustainable yield, supplies necessary to recover overdraft basins, and supplies lost due to pollution and other groundwater contaminants. (3) Current and projected land use patterns, including the mix of residential, commercial, industrial, agricultural, and undeveloped lands. (4) Environmental water needs, including regulatory instream flow requirements, nonregulated instream uses, and water needs by wetlands, preserves, refuges, and other managed and unmanaged natural resource lands. (5) Current and projected population. (6) Current and projected water use for all of the following: (A) Interior uses in a single-family dwelling. (B) Exterior uses in a single-family dwelling. (C) All uses in a multifamily dwelling. (D) Commercial uses. (E) Industrial uses. (F) Parks and open spaces. (G) Agricultural water diversion and use. (7) Evapotranspiration rates for major crop types, including estimates of evaporative losses by irrigation practice and the extent to which evaporation reduces transpiration. (8) Current and projected adoption of urban and agricultural conservation practices. (9) Current and projected supplies of water provided by water recycling and reuse. (10) Estimated loss of storage capacity behind dams resulting from  siltation   sedimentation  , as found by the study conducted pursuant to subdivision (b) of Section 6120. (d) The department shall include a discussion of the potential for alternative water pricing policies to change current and projected water uses identified pursuant to paragraph (6) of subdivision (c). (e) This section does not require the department to update, or prohibit the department from updating, any data necessary to update The California Water Plan pursuant to subdivision (b) of Section 10004.