Don Pedro Project Relicensing Modesto Irrigation District | Turlock Irrigation District FERC Project No. 2299

Water Temperature Modeling Procedural Background July 16, 2009 FERC Order –IFIM and Water Temperature Modeling Study Plan October 14, 2009 – Districts Final Study Plan to FERC Includes Agency Comments on Draft Plan and resolution May 2, 2010 FERC Order – Study Plan Implementation Staff conclusions regarding Agency Comments July 21, 2010 FERC Order – Revised Implementation Schedule November 9, 2010 Progress Report March 12, 2011 Final Report Deadline September 3, 2009 – Districts Draft Study Plan to Agencies October 5, 2009 – Agency Comments to Districts regarding methodology and process November 5, 2009 – Agency Comments of Final Study Plan December 18, 2009 – Districts Response to Agency Comments 2 Don Pedro Project Relicensing, FERC Project No. 2299 April 20, 2011

Water Temperature Modeling Water Temperature Modeling Study Progress Milestones Validate Existing Water Temperature Model Completed August 10, 2010 Initial Scenario Development and Evaluation Completed September 9, 2010 Model Simulations and Analysis Completed October 25, 2010 Progress Report Completed November 9, 2010 Agency Review Draft Report Preparation Completed December 10, 2010 Agency Review Comment Period Completed January 10, 2011 Final Report to Commission Completed March 12, 2011 Instream Flow and Effective Habitat Evaluations* September – December 2011 3 Don Pedro Project Relicensing, FERC Project No. 2299 April 20, 2011

Water Temperature Modeling Study Questions from July 16, 2009 FERC Order: Flows needed to meet MWAT of 68°F (20°C) from La Grange Dam (RM 53) to Roberts Ferry Bridge (RM 39.5) in summer Relationship between flow and water temperature at various time periods in the lower Tuolumne River Agency Study Questions – Flows needed to meet: MWAT of 64.4°F (18°C) from La Grange Dam (RM 52) to Roberts Ferry Bridge (RM 39.5) in summer MWAT of 18ºC (64.4ºF) from La Grange Dam (RM 52) to the San Joaquin River (RM 0) from October 15 to December 1st MWAT of 13ºC (55.4ºF) from La Grange Dam (RM 52) to Roberts Ferry Bridge (RM 39.5) from October 15, to February 15 MWAT of 15ºC (59.0ºF) from La Grange Dam (RM 52) to San Joaquin River (RM 0) from March 20 to May 15 September 3, 2009 – Districts Draft Study Plan to Agencies October 5, 2009 – Agency Comments to Districts regarding methodology and process November 5, 2009 – Agency Comments of Final Study Plan December 18, 2009 – Districts Response to Agency Comments 4 Don Pedro Project Relicensing, FERC Project No. 2299 April 20, 2011