Meeting Date:

April 18, 2005





David A. Berger,




General Manager

Line Item No.:




Prepared By:


Joe Oliver

Cost Estimate:


General Counsel Approval:


Committee Recommendation:


CEQA Compliance:



SUMMARY:  As a condition of approval for creation of the Monterra Ranch Mutual Water Company (MRMWC) water distribution system, a comprehensive water monitoring program report is required to be submitted each year, subject to review and approval by the District Board.  The location of the MRMWC Service Area is shown in Exhibit 4-A.  Accordingly, the MRMWC Annual Water Monitoring Program Report for Water Year (WY) 2004 has been received and reviewed by District staff.  The WY 2004 report has been distributed under separate cover to the Board, and is available for review at the District office.


RECOMMENDATION:  Staff recommends that the MRMWC Annual Water Monitoring Program Report for WY 2004 be accepted as fulfilling the requirements of the MRMWC WDS permit conditions.  The report will be accepted with adoption of the Consent Calendar.


BACKGROUND:  The Water Distribution System (WDS) permit to create the MRMWC was originally approved by the District Board on February 26, 1990, and conditions have been amended on several occasions since that time at the request of the system owners. The current MRMWC WDS permit approval is for a system capacity (production limit) of 203.1 acre-feet per year (AF/yr), and an expansion capacity limit (number of authorized connections) of 286 connections.  The water supply for the subdivision is from individual wells on the Monterra Ranch property, which are drilled and completed in the fractured shales of the Monterey Formation.  Well water production is for non-potable and potable uses.  Because the raw water produced from the eight active supply wells does not meet all State Title 22 drinking water standards, the water is treated for removal of excess dissolved solids at an onsite reverse-osmosis (RO) water treatment plant, prior to delivery to the potable water distribution system.


A summary of water production, delivery and connection data from 1996 through 2004 was provided in the WY 2004 report and is included as Exhibit 4-B.  As shown, well water production for the most recent reporting period, WY 2004, totaled 146.44 acre-feet (AF), which is 72% of the MRMWC WDS permit system capacity.  RO plant production in WY 2004 was 40.97 AF, and RO plant brine concentrate production was 7.38 AF, or 15.3% of RO plant production.  WY 2004 total metered consumption (i.e., potable water metered delivery) was 37.85 AF, and consumption loss (i.e., unaccounted water loss) was 7.6%.  The difference between well production and RO production (RO plant plus brine concentrate production) is 98.09 AF; this represents water produced for non-potable uses including landscape irrigation and construction purposes during WY 2004.  Active water connections for WY 2004 totaled 73, of which seven were temporary construction connections.  This is 26% of the MRMWC WDS permit expansion capacity limit.  Additional information regarding operations and analysis of the MRMWC water monitoring data is provided in the WY 2004 annual report.


During review of last year’s (WY 2003) monitoring report, the District requested that several modifications be included in future annual reports to facilitate representation of the data in a format that is easier to follow and summarize.  Accordingly, the WY 2004 report includes these requested modifications.  Exhibit 4-C includes report Figures 2 and 3 as examples of such modifications, showing the WY 2004 monthly distribution of potable and non-potable uses (Figure 2) and historical summary of annual well production, RO plant production and non-potable use (Figure 3).


On February 24, 2005, the District Board approved the application to create the Cañada Woods Water Company Water Distribution System, combining the existing Cañada Woods and MRMWC systems.  Accordingly, future annual monitoring reports will incorporate data from these combined systems.


IMPACTS TO STAFF/RESOURCES: District staff time for review of the MRMWC annual report is partially defrayed by an annual $1,000 environmental review fee as included as a condition of the MRMWC WDS permit.  This payment has been received for the WY 2004 reporting period.



4-A      Map showing Monterra Ranch Mutual Water Company (MRMWC) Service Area

4-B      Table 1, Summary of Production, Delivery and Connection Data for Monterra Ranch Mutual Water Company, Annual Water Monitoring Program:  1996-2004

4-C      Figure 2, Water Year 2004 Potable and Non-Potable Uses, and Figure 3, Summary of Annual Well Production, RO Plant Production and Non-Potable Use