Rulemaking: Water Storage Investment Program Quantification Regulations

The California Water Commission has proposed regulations for the quantification and management of the public benefits of water storage projects in accordance with the requirements of Proposition 1. The proposed regulations were published in the California Notice Register on January 29, 2016, commencing a public process for adoption. Information about the process, drafts of the proposed regulations and related documents, and public comments on the proposed regulations can be found below.

Final Rulemaking Package Filed with the Office of Administrative Law:
The Final Rulemaking Package was filed with the Office of Administrative Law (OAL) on January 23, 2017. OAL has 30 working days to review the rulemaking package.
Documents Adopted by the Commission on December 14, 2016:
The Commission adopted the proposed regulations at its December 14, 2016 meeting.
Documents Released November 7, 2016:
The Commission is releasing a discussion draft of revised proposed regulations for the Water Storage Investment Program to facilitate discussion at the Commission's November 10, 2016 meeting. Additional revisions may be included in the upcoming formal comment period required pursuant to the Administrative Procedure Act, as directed by the Commission.
Additional Related Documents, November 2, 2016:
Recently Commission staff completed a quality assurance review of the Water Storage Investment Program (WSIP) Climate Change and Sea Level Rise Statewide datasets and the CalSim-II and DSM2 model products.  During the quality assurance review, staff discovered that one of the data processing steps resulted in an erroneous shift of some streamflows from February into March of each year.

As a result, staff recommended some corrections and revisions to the products published on September 9, 2016 (model runs dated 9-3-16). These corrections and revisions are limited to the climate change modifications to the hydrologic inputs to CalSim-II.  Streamflows for the following rivers were affected: Sacramento, Feather, American, Mokelumne, Calaveras, Stanislaus, Tuolumne, Merced, Chowchilla, Fresno, and San Joaquin. 

Updated CalSim-II and DSM2 model products can be found below, as well as sent to applicants on a DVD.  If the regulations governing WSIP are adopted by the California Water Commission, and an applicant uses the model products, these versions of the models will be required.  Staff intends to include these new model products in the upcoming formal comment period required pursuant to the Administrative Procedure Act.  The Commission is releasing these new versions in advance of the formal comment period to assist and encourage potential applicants to begin running the models as early as possible.

Without-Project 2030 Future Conditions:
  • CalSim-II model and output - Updated November 2, 2016
Without-Project 2070 Future Conditions:
  • CalSim-II model and output - Updated November 2, 2016
1995 Historical Temperature-detrended Conditions (Reference):
Additional Related Documents, September 9, 2016:
​Without-Project 2030 Future Conditions:
  • CalSim-II model and output - Updated version posted November 2, 2016, see above
Without-Project 2070 Future Conditions:
  • CalSim-II model and output - Updated version posted November 2, 2016, see above
1995 Historical Temperature-detrended Conditions (Reference):
Revised Regulations and Related Documents, September 2, 2016:
Proposed revisions to the regulations and related documents were released for public comment from September 2, 2016 to October 3, 2016. Public comments were also accepted on related documents that were released September 9. 2016. The Commission also held a public meeting on September 16, 2016 in Sacramento where written and oral comments were accepted.
Additional information can be found in the Notice of Public Availability of Modified Text and additional documents below.
Documents Released January 29, 2016:
The proposed regulations were published in the California Notice Register on January 29, 2016, commencing a 45-day public comment period that ended on March 14, 2016. The Commission also accepted comments during a public hearing that was held on March 16, 2016.