Janis Eckard 15417 De La Cruz Drive Rancho Murieta, Ca, 95683 August 21, 2024 Rancho Murieta CSD General Manager and Board Members 15160 Jackson Road Rancho Murieta, Ca, 95683  Dear Ms. Mimi Morris and Board Members,  This letter is in response toi the Public Records Act Request submitted at the. July 17, 2024 Board meeting. That request was the result of water study questions going unanswered for sixteen months. Althoughloffered to wave the Public Records Act Request (if my questions were answered) it came as no surprise to me - that the requested documents were delayed Although CSD's response may be within "the letter oft the law," the information provided is not ink keeping with "the spirit oft the law."! From my perspective, CSD's refusal to answer simple A Board member did provide some of the requested information, resulting ini the attached One important question remains unanswered: "When does the study assume drought conservation measures begin and how long does the study assume those measures will be in As study chart, found on the CSD website, appears to state that drought conservation measures begin when the lake capacity levels drops to 95%, which is almost every month of everyyear, including years of heavy rainfall. It should also be pointed out that the study drought conservation rate is 30%. This number is in addition toi the state mandated 20% water usage reduction level by the year 2020, which Rancho Murieta has not met. In my opinion, any Board member who votes to approval additional development, before knowing the study drought conservation details, will be guilty of malfeasance.  and once received provided little additional information. study questions is "stonewalling," at it's finest.  breakdown. place?"  Sincerely, Janis Eckard        CSD STUDY SUPPLY AND DEMAND NUMBERS  3708 Acre Feet - Lake Calero's and Lake Chesbro's capacity, w/flashboards ("1) -737 Acre Feet lost to reservoir evaporation - average years ("2) -287 Acre Feet lost to reservoir seepage average years ("3) 237.02 Acre Feet Dead Storage - unusable portion of lakes ("4) 2447.02 ACRE FEET NET AVAILABLE SUPPLY or 2,089.28 ACRE FEET without flashboards  1716 Acre Feet - CURRENT DEMAND less water lost to leaks and breaks("5) ("6)  281.6 Acre Feet - APPROVED DEVELOPMENT 1997.6 Acre Feet = TOTAL DEMAND  REASON WHY THESE NUMBER MAY NOT BE ACCURATE.  1. This number includes the flashboard capacity of the reservoirs. Relying on the flashboard capacity of the reservoirs is not an acceptable practice, per The Department of Public Health and Ken Giberson (the water engineer who completed CSD's 1980-1990 studies). Although Rancho Murieta has been able to fill this capacity in "most" years. Planning development reliant on water that may or may not be available is not a safe practice. The total capacity without flashboards is 3,350.28 AF or 357.72 Acre Feet less than the 2. This is an "average years" figure and does not represent drought conditions. 3. This is an "average years' figure and does not represent drought conditions. 4. All prior studies state that the dead storage portion of Lake Chesbro and Lake Calero is 5. The study assumes a 12% current and future system loss rate. The 1990 CSD study used a1 10% rate, described as low, due to thet fact that the system was relatively new and less prone to leakage. The average life expectance of a pipei is 50 years. Rancho Murieta'si infrastructure is old and in need of repair/replacement. Is a 12% loss rate 6. The current demand number is likely understated for thei following reasons: a) The Department of Public Health discovered that CSD's 2010 study understated the existing demand figure by 8%. The 2010 number was 1710. AF (almost identical to the current 1716 figure). Significant development has occurred since. 2010. b) There are homes missing from the study. c) The CSD does not use the industry standard method of calculating  study number.  Dry years result in additional evaporation losses. Dry years result in additional seepage losses. 350 Acre Feet, 68.4. Acre Feet more than the current study.  realistic?  existing and future water usage.  THESE NUMBERS REPRESENT ANNUAL SUPPLY AND DEMAND1 TOTALS. RANCHO MURIETA WAS UNABLE TO FILL IT'S LAKES DUE TO REDUCED COSUMNES RIVER FLOWS, DURING THE 1976-1977 WATER YEAR. RANCHO MURIETA CANNOT PUMP FROM THE RIVER, DURING SUMMER MONTHS. IF RANCHO MURIETA EXPERIENCES ANOTHER 1976-1977 DROUGHT EVENT, IT WOULD BE NECESSARY FOR' THE COMMUNITY TO SURVIVE. Al MINIMUM OF 17 MONTHS WITHOUT RIVER WATER. UNLIKE MOST COMMUNITIES, RANCHO MURIETA DOES NOT HAVE. A BACKUP WATER  SUPPLY.        ADDITIONAL SUPPLYWITHLAKE CLEMENTIA. AS A. PERMITTED STORAGE  ACRE FEET  RESERVOIR  Clementia Gross Storage evaporation rates  850 (168) (65) 617 2,449 617 3,066  Clementia Evaporation using current 19.8% Seepage using current 7.7% seepage rates Net Clementia Storage on June 1 (100% full) Calero & Chesbro Net Storage (from chart 1) Clementia Net Storage. (from above)  Total Net Storage With 3 Permitted Reservoirs Total Present Annual Water Demand + All Annual Entitied Demand for which there are county approved final maps (chart #1 above) Excess Storage In Calero, Chesbro and Clementia on June 1. Pumping may not begin  1,997.6 1,068.4  until November 1  Average months of supply on June 1 of a water year without conservation in place with Lake Clementia available for potable use Aggressive, 50% conservation will double water storage. & double the average months of  5.3 10.6  supply  Neither at two or three reservoir supply provide an' "emergency" or additional contingency source of supply Clementia dead storage is unknown andi is not shown. Clementia has not been evaluated" with bathymetric and Clementia's actual storage is unknown. Clementia is permitted for 850 acre feet of storage buti is included in ap per annum storage limits contained in Permit 16762. Per annum storage is limited to at total of 2,650 acre feet that  Emergency storage is not showni int these charts  may be stored in Clementia, Calero and Hole 10 South.    STORAGE IN PERMITTED CALERO AND CHESBRO RESERVOIRS Gross Storage Combined Calero + Chesbro including stop logs, using bathymetric results ofr reservoir capacity Evaporation Calero + Chesbro Seepage Dead Storage Calero + Chesbro Net Storage Combined Calero + Chesbro (assumes 100% full on June 1 of a water year after subtracting annual losses for evaporation, seepage and dead storage  ACRE FEET 3,708 (737) (287) (233) 2,449  Calero + Chesbro  Actual Water Demand on 12/31/2022 (includes water billed and systems losses and un-billed Entitled Development Beyond 12/31/2022  1,716  water  +F Retreats +F Riverview + Residences +M Murieta Gardens approved final maps  24 92 165 0.6 1997.6  Total Present Water Demand + All Future Entitled Demand fori which there are county  Average Demand Per Month  166.4 451.4  Excess Storage In Calero and Chesbro at the end of diversion on June 1 (assumes 100% full) This is NOT emergency storagel  Average months of supply on June 1 of a water year without conservation inj place Aggressive, 50% conservation will double double the average months of supply  2.7 5.4