Ground surveys, using total-station equipment with datalogger, will be based on recoverable range points established for the 1982 survey. X and Y coordinates are in latitude-longitude or distances and angles from transit points. Elevations are based on a sea-level datum. Survey data will be used to produce a topographic map showing contour intervals of 10 feet. The stage-capacity curve will provide city managers with the amount of water in the reservoir on a daily basis.
Capacity is related to stage which can be obtained by staff readings at any time.
The size of deposited bottom sediments will be measured by sieve analysis at the California District sediment laboratory in Salinas. Data were collected in November 1998. A comparison of cross sections from a 1982 survey and the 1998 survey was analyzed to determine loss of capacity in the upper reach of the reservoir. The maximum capacity of the reservoir was about 8,990 acre-feet at the spillway elevation. Loss of capacity from 1982 to 1998 was about 55 acre-feet.