Slide 1

Pilot Project Alternatives FRANKS TRACT San Joaquin River False River Old R i v e r Sacramento River Operable Gates in Three Mile Slough Alt #1 Operable Gates in Old River Operable Gates in Holland Cut Operable Gates in False River Operable Gates in Sand Mound Slough San Joaquin River Operable Gates in False River Alt #2 Alt #3 Alt #2 Alt #4 Three Mile Sl. Slide 2 FRANKS TRACT San Joaquin River False River Old R i v e r Sacramento River Alt #1 San Joaquin River Operable Gates in False River Three Mile Sl. Operation Scenarios Closed 20% Open Open/Close West False River Alternative Slide 3 Base False River Restriction 20% Open False River Gate Open/Close Operation False River Gate Closed Year 2002 - Tidally Averaged EC SWP Slide 4 Year 2002 - Tidally Averaged EC CVP Base False River Gate Three Mile Slough Gate Slide 5 Year 2002 - Tidally Averaged EC CCWD at Old River Base False River Gate Three Mile Slough Gate Slide 6 Year 2002 - Tidally Averaged EC CCWD at Rock Slough Base False River Gate Three Mile Slough Gate Slide 7 Year 2002 - Tidally Averaged EC CCWD at Victoria Canal Base False River Gate Three Mile Slough Gate Slide 8 Year 2002 14-Day Average EC Sacrament River @ Emmaton Base False River Gate Three Mile Slough Gate Slide 9 West False River, Tidally Average EC, Sept 1, 2002 Base Open/Close Gate Closed 20% Open Slide 10 Year 2001 - Tidally Averaged EC SWP Base False River Gate Three Mile Slough Gate Slide 11 Year 2001 - Tidally Averaged EC CVP Base False River Gate Three Mile Slough Gate Slide 12 Year 2001 - Tidally Averaged EC CCWD at Old River Base False River Gate Three Mile Slough Gate Slide 13 Year 2001 - Tidally Averaged EC CCWD at Victoria Canal Base False River Gate Three Mile Slough Gate Slide 14 Year 2001 - Tidally Averaged EC CCWD at Rock Slough Base False River Gate Three Mile Slough Gate Slide 15 Year 2001 - Tidally Averaged EC SWP Base False River Gate Three Mile Slough Gate The TMS Gate diversions were able to further reduce EC at the Clifton Court intake in December 2001, a time when SWP export flows were increased. Slide 16 Year 2001 14-Day Average EC Sacrament River @ Emmaton Base False River Gate Three Mile Slough Gate Slide 17 Year 1994 - Tidally Averaged EC SWP Base False River Gate Three Mile Slough Gate Slide 18 Year 1994 - Tidally Averaged EC CVP Base False River Gate Three Mile Slough Gate Slide 19 Year 1994 - Tidally Averaged EC CCWD at Old River Base False River Gate Three Mile Slough Gate Slide 20 Year 1994 - Tidally Averaged EC CCWD at Victoria Canal Base False River Gate Three Mile Slough Gate Slide 21 Year 1994 14-Day Average EC Sacrament River @ Emmaton Base False River Gate Three Mile Slough Gate Slide 22 Three Mile Slough Gate and West False River Gate 1992 Simulations West False River gate operation begins May 1, 1992 - About the time when EC for the SJR near Jersey Point begins to rise above Franks Tract EC FRG operation ends Dec 7, 1992 when central Delta begins to be flushed with fresher water from the Mokelume system. (Dont want the gate to impede the flushing of the central Delta) TMS gate was not operated. There was not the opportunity to balance the Emmaton and Jersey Point flows (net flow for the SJR at Jersey Point most always greater than the net flow for the Sacrameto R. at Emmaton). Slide 23 Three Mile Slough Gate and West False River Gate 1992 Simulations The West False River gate raises EC at Emmaton a slight amount. Historically the DCC was closed a few times in late May and early June 1992 to meet Emmaton standards. The DCC may require some additional closure with the FRG operation to maintain the Emmaton EC. Slide 24 Year 1992 - Tidally Averaged EC SWP Base False River Gate Slide 25 Year 1992 - Tidally Averaged EC CVP Base False River Gate Slide 26 Year 1992 - Tidally Averaged EC CCWD at Old River Base False River Gate Slide 27 Year 1992 - Tidally Averaged EC CCWD at Victoria Canal Base False River Gate Slide 28 Year 1992 - Tidally Averaged EC CCWD at Rock Slough Base False River Gate Slide 29 Year 1992 14-Day Average EC Sacrament River @ Emmaton Base False River Gate Slide 30 Year 1991 - Tidally Averaged EC SWP Base Three Mile Slough Gate 1000 cfs diversion False River Gate 20 % Open Slide 31 FRANKS TRACT San Joaquin River False River Old R i v e r Sacramento River Operable Gates in False River Operable Gates in Sand Mound Slough San Joaquin River Alt #2 Three Mile Sl. Operation Scenarios 1.Closed 2.False River Gate Open on Ebb Tide East Levee + 2 Gates Alternative Slide 32 2002 Tidally Averaged EC SWP Base East Levee Open on Ebb East Levee Closed Slide 33 BaseClosed Open on Ebb East Levee + 2 Gates, Tidally Average EC, Sept 1, 2002 Slide 34 FRANKS TRACT San Joaquin River False River Old R i v e r Sacramento River Operable Gates in Old River Operable Gates in Holland Cut San Joaquin River Alt #3 Three Mile Sl. Operation Scenario 1.Closed 2.Open Gates on Holland Cut during Ebb Tides COX: Holland Cut + Old River Gate Alternative Slide 35 2002 Tidally Averaged EC SWP Base Cox Alternative Open on Ebb Cox Alternative Closed Slide 36 BaseClosed Open on Ebb COX, Tidally Average EC, Sept 1, 2002 Slide 37 Three Miles Slough Alternative FRANKS TRACT San Joaquin River False River Old R i v e r Sacramento River Operable Gates in Three Mile Slough San Joaquin River Three Mile Sl. Operation: Close during Portion of Ebb Tide Slide 38 Three Mile Slough Gate Variable Diversion for 2002 (daily average diversion in cfs from Sacramento to San-Joaquin) June1500 July3000 August3000 September 1-202500 September 21-30 500 October 1-15 500 October 16-311000 November 1-10 1000 November 11-30 2000 December 1-15 2000 December 16-31 0 Slide 39 Three Mile Slough Gate Closure CLOSED OPEN CLOSED OPEN CLOSED OPEN 4 - 6 hrs Slide 40 Base False River Gate Three Mile Slough Gate One Gate Open DCC Operation One Gate Open 2002 Tidally Averaged EC SWP Period of Operation Both Gates Open Slide 41 Year 2002 - Tidally Averaged EC CVP Base False River Gate Three Mile Slough Gate Slide 42 Year 2002 - Tidally Averaged EC CCWD at Old River Base False River Gate Three Mile Slough Gate Slide 43 Year 2002 - Tidally Averaged EC CCWD at Rock Slough Base False River Gate Three Mile Slough Gate Slide 44 Year 2002 - Tidally Averaged EC CCWD at Victoria Canal Base False River Gate Three Mile Slough Gate Slide 45 Year 2002 14-Day Average EC Sacrament River @ Emmaton Base False River Gate Three Mile Slough Gate Slide 46 Three Mile Slough Gate Tidally Average EC Sept 1, 2002 Base Three Mile Slough Gate Slide 47 Three Mile Slough Gate Variable Diversion for 2001 (daily average diversion from Sacramento to San-Joaquin) Slide 48 Year 2001 - Tidally Averaged EC SWP Base False River Gate Three Mile Slough Gate Slide 49 Year 2001 - Tidally Averaged EC CVP Base False River Gate Three Mile Slough Gate Slide 50 Year 2001 - Tidally Averaged EC CCWD at Old River Base False River Gate Three Mile Slough Gate Slide 51 Year 2001 - Tidally Averaged EC CCWD at Victoria Canal Base False River Gate Three Mile Slough Gate Slide 52 Year 2001 - Tidally Averaged EC CCWD at Rock Slough Base False River Gate Three Mile Slough Gate Slide 53 Year 2001 - Tidally Averaged EC SWP Base False River Gate Three Mile Slough Gate The TMS Gate diversions were able to further reduce EC at the Clifton Court intake in December 2001, a time when SWP export flows were increased. Slide 54 Year 2001 14-Day Average EC Sacrament River @ Emmaton Base False River Gate Three Mile Slough Gate Slide 55 Three Mile Slough Gate Variable Diversion for 1994 (daily average diversion from Sacramento to San-Joaquin) Slide 56 Year 1994 - Tidally Averaged EC SWP Base False River Gate Three Mile Slough Gate Slide 57 Year 1994 - Tidally Averaged EC CVP Base False River Gate Three Mile Slough Gate Slide 58 Year 1994 - Tidally Averaged EC CCWD at Old River Base False River Gate Three Mile Slough Gate Slide 59 Year 1994 - Tidally Averaged EC CCWD at Victoria Canal Base False River Gate Three Mile Slough Gate Slide 60 Year 1994 14-Day Average EC Sacrament River @ Emmaton Base False River Gate Three Mile Slough Gate Slide 61 Year 1991 (Critical)-Tidally Averaged EC, SWP Base Three Mile Slough Gate 1000 cfs diversion False River Gate 20 % Open Slide 62 Operate Three Mile Slough Gate in Lieu of Delta Cross Channel Gates Slide 63 DCC Closed Three Mile Slough Gate Diversion for 2002 (daily average diversion from Sacramento to San-Joaquin) Slide 64 Year 2002 - Tidally Averaged EC SWP Base DCC Closed TMS Gate and DCC Closed Slide 65 Year 2002 - Tidally Averaged EC CVP Base DCC Closed TMS Gate and DCC Closed Slide 66 Year 2002 - Tidally Averaged EC Old River at Bacon Island Base DCC Closed TMS Gate and DCC Closed Slide 67 Year 2002 - Tidally Averaged EC CCWD at Old River Base DCC Closed TMS Gate and DCC Closed Slide 68 Year 2002 - Tidally Averaged EC CCWD at Victoria Canal Base DCC Closed TMS Gate and DCC Closed Slide 69 Year 2002 - Tidally Averaged EC CCWD at Rock Slough Base DCC Closed TMS Gate and DCC Closed Slide 70 Preliminary Result Water Quality Benefits during drought Slide 71 Three Mile Gate During Drought Period Base-OCAP 3 Mile Gate Operated