National Geodetic Survey, Retrieval Date = OCTOBER 30, 1999 EW7620 *********************************************************************** EW7620 DESIGNATION - COBBLESTONE EW7620 PID - EW7620 EW7620 STATE/COUNTY- CA/VENTURA EW7620 USGS QUAD - COBBLESTONE MTN (1979) EW7620 EW7620 *CURRENT SURVEY CONTROL EW7620 ___________________________________________________________________ EW7620* NAD 83(1992)- 34 36 32.33668(N) 118 52 04.27087(W) ADJUSTED EW7620* NAVD 88 - 2053.8 (meters) 6738. (feet) VERTCON EW7620 ___________________________________________________________________ EW7620 EPOCH DATE - 1991.35 EW7620 LAPLACE CORR- -2.77 (seconds) DEFLEC99 EW7620 GEOID HEIGHT- -32.39 (meters) GEOID99 EW7620 EW7620 HORZ ORDER - FIRST EW7620 EW7620.The horizontal coordinates were established by classical geodetic methods EW7620.and adjusted by the National Geodetic Survey in June 1996. EW7620.The horizontal coordinates are valid at the epoch date displayed above. EW7620.The epoch date for horizontal control is a decimal equivalence EW7620.of Year/Month/Day. EW7620 EW7620.The NAVD 88 height was computed by applying the VERTCON shift value to EW7620.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) EW7620 EW7620.The Laplace correction was computed from DEFLEC99 derived deflections. EW7620 EW7620.The geoid height was determined by GEOID99. EW7620 EW7620; North East Units Scale Converg. EW7620;SPC CA 5 - 2,045,130.50 6,300,535.97 sFT 0.99992519 -0 29 40.9 EW7620;SPC CA 5 - 623,357.022 1,920,407.203 MT 0.99992519 -0 29 40.9 EW7620;UTM 11 - 3,831,267.980 328,737.632 MT 0.99996153 -1 03 40.1 EW7620 EW7620: Primary Azimuth Mark Grid Az EW7620:SPC CA 5 - COBBLESTONE AZ MK 125 47 44.1 EW7620:UTM 11 - COBBLESTONE AZ MK 126 21 43.3 EW7620 EW7620|---------------------------------------------------------------------| EW7620| PID Reference Object Distance Geod. Az | EW7620| dddmmss.s | EW7620| COBBLESTONE AZ MK 1251803.2 | EW7620| COBBLESTONE RM 1 4.883 METERS 13813 | EW7620| EW7621 TOPATOPA LOOKOUT APPROX.13.5 KM 2345504.2 | EW7620| COBBLESTONE RM 2 4.802 METERS 35321 | EW7620|---------------------------------------------------------------------| EW7620 EW7620 SUPERSEDED SURVEY CONTROL EW7620 EW7620 NAD 83(1986)- 34 36 32.33759(N) 118 52 04.26670(W) AD(1984.00) 1 EW7620 NAD 27 - 34 36 32.38440(N) 118 52 00.92260(W) AD( ) 1 EW7620 NGVD 29 - 2052.9 (m) 6735. (f) VERT ANG EW7620 EW7620.Superseded values are not recommended for survey control. EW7620.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. EW7620.See file dsdata.txt to determine how the superseded data were derived. EW7620 EW7620 HISTORY - Date Condition Recov. By EW7620 HISTORY - 1941 MONUMENTED CGS EW7620 HISTORY - 1959 MONUMENTED CGS EW7620 HISTORY - 1967 MONUMENTED CGS EW7620 HISTORY - 1976 MONUMENTED USGS EW7620 HISTORY - 1978 GOOD CA-111 EW7620 EW7620 STATION DESCRIPTION EW7620 EW7620'DESCRIBED BY COAST AND GEODETIC SURVEY 1941 (JCS) EW7620'STATION IS IN THE LOS PADRES NATIONAL FOREST, ON THE TOP OF EW7620'COBBLESTONE MOUNTAIN, WHICH LIES ABOUT 14 MILES AIR LINE NNW EW7620'OF PIRU. IT IS ON THE WESTERN AND HIGHEST ONE OF THE ROUND EW7620'KNOBS ON THE SUMMIT OF THE PEAK. EW7620' EW7620'THE STATION MARK IS A STANDARD DISK SET IN ROCK ON THE HIGHEST EW7620'PEAK OF COBBLESTONE MOUNTAIN. A LARGE BOULDER ABOUT 6 FEET EW7620'W OF THE STATION IS ABOUT 3 FEET HIGHER THAN THE MARK. THE EW7620'RIDGE IS COVERED WITH SCRUB OAK INTERSPERSED WITH PINE. THE EW7620'MARK IS STAMPED COBBLESTONE 1941. EW7620' EW7620'REFERENCE MARK NO. 1 IS A STANDARD DISK SET IN ROCK. IT IS EW7620'ABOUT 1 FOOT LOWER THAN THE STATION. IT IS STAMPED COBBLESTONE EW7620'NO. 1 1941. EW7620' EW7620'REFERENCE MARK NO. 2 IS A STANDARD DISK SET IN ROCK. IT IS EW7620'ABOUT 3 FEET LOWER THAN THE STATION. IT IS STAMPED COBBLESTONE EW7620'NO. 2 1941. EW7620' EW7620'THE AZIMUTH MARK IS A STANDARD DISK SET IN ROCK ON THE S SIDE EW7620'OF THE RIDGE, ON THE S SHOULDER OF THE SECOND RISE E OF THE EW7620'STATION. IT IS STAMPED COBBLESTONE 1941. EW7620' EW7620'TO REACH FROM PIRU, TAKE THE OILED ROAD UP PIRU CREEK FOR 8.0 EW7620'MILES TO A WHITE GATE AT THE END OF THE OILED PAVEMENT. THIS EW7620'IS THE BEST PLACE TO LEAVE THE TRUCK EXCEPT IN A VERY DRY SEASON, EW7620'SINCE THERE ARE SEVERAL FORDS ABOVE THIS POINT AND NONE BELOW IT. EW7620'IN A DRY SEASON TRUCKS CAN BE DRIVEN 4.5 MILES FURTHER UP, TO EW7620'AGUA BLANCA CAMP, NEAR THE MOUTH OF AGUA BLANCA CREEK. FROM EW7620'THE END OF TRUCK TRAVEL, FOLLOW THE DIRT ROAD TO AGUA BLANCA EW7620'CAMP, THEN GO UP AGUA BLANCA CREEK BY TRAIL, PASSING THE EW7620'FOLLOWING CAMP GROUNDS, LOG CABIN, HOLLISTER, TIN CAN, ANT, EW7620'SADDLE SKIRT, CAMPO BARRACHO, AND COBBLESTONE. COBBLESTONE EW7620'CAMP GROUND IS THE LIMIT OF HORSE TRAVEL. FROM HERE GO ON FOOT EW7620'AROUND THE E SIDE OF THE MOUNTAIN TO A SADDLE, THEN BRANCH OFF EW7620'FROM THE TRAIL UP THE RIDGE TO THE WESTWARD, FOLLOWING THE EW7620'RIDGE TO THE HIGHEST POINT AND THE STATION. 12 TO 16 HOURS EW7620'BY HORSE, 1 HOUR AFOOT. EW7620' EW7620'ALL OBJECTS VISIBLE FROM THE GROUND. EW7620 EW7620 STATION RECOVERY (1959) EW7620 EW7620'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1959 (OSR) EW7620'THE STATION WAS RECOVERED AND ALL MARKS WERE FOUND IN GOOD EW7620'CONDITION. THE STATION WAS REACHED BY HELICOPTER. EW7620 EW7620 STATION RECOVERY (1967) EW7620 EW7620'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1967 (CAA) EW7620'STATION MARK, REFERENCE MARKS 1 AND 2 AND THE AZIMUTH MARK WERE EW7620'RECOVERED AS DESCRIBED AND FOUND IN GOOD CONDITION. NO EW7620'NOTICEABLE MOVEMENT WAS NOTED IN THE VICINITY OF THE STATION. EW7620' EW7620'STATION WAS REACHED BY HELICOPTER FROM THE OAK FLAT GUARD EW7620'STATION, WHICH IS ABOUT 17 MILES SOUTH OF GORMAN ON STATE HIGHWAY EW7620'99 (INTERSTATE 5). EW7620' EW7620'NO MEASUREMENT BETWEEN REFERENCE MARKS DUE TO BOULDERS AND TREES. EW7620' EW7620'AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--14 MILES EW7620'NORTH-NORTHWEST OF PIRU. EW7620 EW7620 STATION RECOVERY (1976) EW7620 EW7620'RECOVERY NOTE BY US GEOLOGICAL SURVEY 1976 (GI) EW7620'20 MI HARD DRIVE FROM GORMAN TO STEWART MOUNTAIN ON USFS EW7620'RDS. S. AND SW. TO END OF RD. 3-HOUR, 5 MI HIKE ALONG RIDGES EW7620'SE. TO TOP OF COBBLESTONE MTN AND STATION. EW7620 EW7620 STATION RECOVERY (1978) EW7620 EW7620'RECOVERY NOTE BY VENTURA COUNTY CALIFORNIA 1978 (RRW) EW7620'THE STATION MARK AND REFERENCE MARKS 1 AND 2 WERE RECOVERED IN GOOD EW7620'CONDITION AS DESCRIBED. THE STATION WAS REACHED BY HELICOPTER.