National Geodetic Survey, Retrieval Date = MAY 20, 1994 DC1471 *********************************************************************** DC1471 DESIGNATION - COWLES DC1471 PID - DC1471 DC1471 STATE/COUNTY- CA/SAN DIEGO DC1471 USGS QUAD - LA MESA (1984) DC1471 DC1471 HORZ DATUM - NAD 83 DC1471 VERT DATUM - NGVD 29 DC1471 DC1471 POSITION - 32 48 46.13546(N) 117 01 54.73056(W) ADJUSTED DC1471 83 minus 27 - +00.17946 +03.10456 ADJUSTED DC1471 DC1471 DC1471 HEIGHT - 485.0 (meters) 1591. (feet) VERT ANGLE DC1471 88 minus 29 - +0.6 VERTCON DC1471 *********************************************************************** DC1471 DC1471 EPOCH DATE - 1984.00 DC1471 LAPLACE CORR- 7.46 DEFLEC93 DC1471 GEOID HEIGHT- -33.73 GEOID93 DC1471 DC1471 DC1471 HORZ ORDER - FIRST DC1471 DC1471 DC1471.The horizontal position was established by classical geodetic methods DC1471.and adjusted by the National Geodetic Survey in July 1986. DC1471.The horizontal coordinates are valid at the epoch date displayed above. DC1471 DC1471.The orthometric height was determined by vertical angle observations. DC1471 DC1471.The epoch date is a decimal equivalence of Year/Month/Day. DC1471 DC1471.The Laplace correction was computed from DEFLEC93 derived deflections. DC1471 DC1471.The geoid height was determined by GEOID93. DC1471 DC1471; North East Scale Converg. DC1471;SPC CA 6 - 1,876,421.04 6,321,440.47 0.99999523 -0 25 46.7 sFT DC1471;SPC CA 6 - 571,934.278 1,926,778.908 0.99999523 -0 25 46.7 MT DC1471;UTM 11 - 3,630,536.403 497,016.604 0.99960011 -0 01 02.2 MT DC1471 DC1471: Primary Azimuth Mark Grid Az DC1471:SPC CA 6 - SAN DIEGO PAC RAD KMA 829 MAST 228 45 02.7 DC1471:UTM 11 - SAN DIEGO PAC RAD KMA 829 MAST 228 20 18.2 DC1471 DC1471|---------------------------------------------------------------------| DC1471| Pid Reference Object Distance Geod. AZ | DC1471| dddmmss.s | DC1471| COWLES RM 5.658 METERS 03522 | DC1471| COWLES RM 1 4.195 METERS 05659 | DC1471| COWLES RM 2 5.233 METERS 11538 | DC1471| DC2100 MOUNT HELIX CROSS APPROX. 6.8 KM 1380958.5 | DC1471| DC1458 SAN DIEGO PAC RAD KMA 829 MAST APPROX. 3.6 KM 2281916.0 | DC1471| DC1486 SAN DIEGO LINDA VISTA MUN TANK APPROX.13.5 KM 2572918.0 | DC1471|---------------------------------------------------------------------| DC1471 DC1471 HISTORY - Year Condition Recov. By DC1471 HISTORY - 1939 STATION MONUMENTED COAST AND GEODETIC SURVEY DC1471 HISTORY - 1957 POOR US ARMY MAP SERVICE (NOW DMA) DC1471 HISTORY - 1960 POOR COAST AND GEODETIC SURVEY DC1471 HISTORY - 1963 POOR COAST AND GEODETIC SURVEY DC1471 HISTORY - 1987 GOOD LOCAL SURVEYOR DC1471 DC1471 STATION DESCRIPTION DC1471 DC1471'DESCRIBED BY COAST AND GEODETIC SURVEY 1939 (ACT) DC1471'STATION IS 4 MILES NW OF EL CAJON, 3 MILES N OF LA MESA, ON DC1471'HIGHEST PEAK IN VICINITY, EASILY IDENTIFIED BY A LARGE WHITE DC1471'S OF STATE COLLEGE ON SW SLOPE. DC1471' DC1471'STATION MARK IS A STANDARD BRONZE DISK WEDGED IN A DRILL HOLE DC1471'IN A BOULDER AS DESCRIBED IN NOTE 4. REFERENCE MARKS ARE DC1471'STANDARD BRONZE DISKS SET IN A BOULDER AS DESCRIBED IN NOTE DC1471'12C. DC1471' DC1471'STATION MARK IS STANDARD STATION DISK SET IN A LARGE BOULDER DC1471'OUTCROP, STAMPED COWLES 1938. DC1471' DC1471'REFERENCE MARK NO. 1 IS A STANDARD REFERENCE DISK SET IN DC1471'BOULDER OUTCROP, ENE OF STATION, STAMPED COWLES DC1471'NO. 1 1938. DC1471' DC1471'REFERENCE MARK NO. 2 IS A STANDARD REFERENCE DISK SET IN DC1471'BOULDER OUTCROP, SE OF STATION, STAMPED COWLES DC1471'NO. 2 1938. DC1471' DC1471'AZIMUTH OBJECT IS MOUNT HELIX CROSS, ABOUT 3 MILES S OF STATION. DC1471' DC1471'TO REACH FROM THE 7000 BLOCK OF EL CAJON AVENUE IN EASTERN DC1471'SAN DIEGO, GO N ON PAVED ROAD AS PER SIGN LAKE MURRAY FOR DC1471'3.2 MILES AND TURN LEFT OFF PAVEMENT ONTO GRADED DIRT ROAD, DC1471'GO 0.6 MILE AND TAKE LEFT FORK, GO 0.4 MILE AND KEEP STRAIGHT DC1471'AHEAD (ROAD COMES IN FROM LEFT), GO 0.4 MILE AND TURN RIGHT DC1471'OFF MAIN-TRAVELED ROAD, GO 0.2 MILE UP STEEP GRADE TO END OF DC1471'TRUCK TRAVEL. FOLLOW TRAIL UP HILL PAST THE WHITE S TO DC1471'SUMMIT AND STATION. DC1471' DC1471 DC1471 STATION RECOVERY (1957) DC1471 DC1471'RECOVERY NOTE BY US ARMY MAP SERVICE (NOW DMA) 1957 DC1471'THE STATION AND REFERENCE MARK 1 RECOVERED AS DESCRIBED. DC1471' DC1471'NOTE--THE DISK HAS BEEN MARKED UP WITH A HAMMER. IT IS 112.0 DC1471'FT. N OF THE N TIP OF AN OUTCROPPING ROCK, AND 95.0 FT. E OF DC1471'THE CENTER OF THE OUTCROPPING ROCK. DC1471' DC1471 DC1471 STATION RECOVERY (1960) DC1471 DC1471'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1960 (OSR) DC1471'THE STATION MARK AND REFERENCE MARK NO. 2 WERE FOUND TO BE DC1471'BADLY BATTERED, AND THE STAMPING NO LONGER LEGIBLE. REFERENCE DC1471'MARK NO. 1 HAS BEEN DESTROYED. THIS STATION WAS NOT OCCUPIED DC1471'BY AN OBSERVING PARTY, BUT WAS USED FOR CHECK ANGLE PURPOSES. DC1471'THE FOLLOWING DESCRIPTION TO REACH THE STATION WAS USED-- DC1471' DC1471'FROM THE INTERSECTION OF THE ALVARADO FREEWAY (U.S. 80) AND DC1471'70TH. STREET (OR LAKE MURRAY BOULEVARD) NEAR THE EAST EDGE OF DC1471'SAN DIEGO, GO NORTHEASTERLY ON LAKE MURRAY BOULEVARD FOR DC1471'3.1 MILES TO A NEW HOUSING AREA ON THE LEFT (A RED AND WHITE DC1471'CHECKERED STANDPIPE IS VISIBLE ABOUT 1/2 MILE ON THE LEFT). DC1471'THEN LEFT, NORTHERLY, THROUGH HOUSING AREA FOR 0.45 MILE TO DC1471'A SADDLE AT THE TOP OF A RIDGE (ABOUT 0.1 MILE SOUTHWEST OF DC1471'THE CHECKERED STANDPIPE). THEN LEFT FORK, IMMEDIATELY BEYOND DC1471'SADDLE, FOLLOW BLADED ROAD NORTHWESTERLY FOR 0.35 MILE TO A DC1471'SIDE ROAD ON THE LEFT. A JEEP TRAIL LEADING TO THE STATION IS DC1471'VISIBLE ON THE MOUNTAIN SOUTHWEST OF THIS POINT. BEAR LEFT ON DC1471'SIDE ROAD, TOWARD STATION, FOR 0.35 MILE TO INTERSECTION WITH A DC1471'NORTH-SOUTH ROAD AT THE BASE OF THE MOUNTAIN. JOG RIGHT ABOUT DC1471'0.1 MILE, THEN LEFT ON JEEP TRAIL TO TOP OF MOUNTAIN AND DC1471'STATION. DISTANCE IS APPROXIMATELY 2 MILES. A JEEP CAN BE DC1471'DRIVEN TO THE STATION IN DRY WEATHER. PACKING TIME FROM THE DC1471'WHITE LETTER S ON THE SOUTHEAST SIDE OF THE MOUNTAIN IS DC1471'45 MINUTES. DC1471' DC1471 DC1471 STATION RECOVERY (1963) DC1471 DC1471'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1963 (CAA) DC1471'STATION WAS RECOVERED AND THE STATION MARK AND REFERENCE MARK DC1471'2 WERE FOUND IN PLACE BUT THE STAMPING ON BOTH MARKS HAS BEEN DC1471'OBLITERATED. A PUNCH MARK WAS PUT IN THE CENTER OF REFERENCE DC1471'MARK 2 AT THIS TIME. REFERENCE MARK 1 WAS NOT RECOVERED AND DC1471'IS BELIEVED DESTROYED. REFERENCE MARK 3 WAS SET BUT DESTROYED BY DC1471'VANDALS BEFORE STATION OCCUPATION. ONE POSITION TO CENTER OF DC1471'DRILL HOLE WAS OBSERVED AS NO DISK WAS AVAILABLE FOR DC1471'REPLACEMENT. THE DISTANCE TO REFERENCE MARK 2 CHECKED BUT A DC1471'SLIGHT DIFFERENCE WAS FOUND IN THE DIRECTION. DC1471' DC1471'A COMPLETE NEW DESCRIPTION FOLLOWS. DC1471' DC1471'STATION IS LOCATED ABOUT 4-1/2 MILES NORTHWEST OF EL CAJON, DC1471'3 MILES NORTH OF LA MESA, 1-1/2 MILES NORTHWEST OF LAKE PARK DC1471'AND ON THE HIGHEST PEAK IN THE VICINITY WHICH IS EASILY DC1471'IDENTIFIED BY A LARGE WHITE S ON THE SOUTHWEST SLOPE. DC1471' DC1471'TO REACH FROM THE JUNCTION OF U.S. HIGHWAY 80 (ALVARADO FREEWAY) DC1471'AND MURRAY LAKE ROAD IN THE NORTH SECTION OF SAN DIEGO, GO DC1471'NORTHERLY ON MURRAY LAKE ROAD FOR 1.9 MILES TO EL PASO STREET DC1471'AND TRAFFIC LIGHT, CONTINUE NORTHERLY FOR 0.75 MILE TO SAN CARLOS DC1471'DRIVE AND A UNION 76 SERVICE STATION ON THE LEFT, TURN LEFT DC1471'AND GO WESTERLY ON SAN CARLOS DRIVE FOR 0.3 MILE TO BOULDER DC1471'LAKE AVENUE, TURN RIGHT AND GO NORTH ON BOULDER LAKE AVENUE FOR DC1471'0.45 MILE TO HARWELL DRIVE, TURN RIGHT ON HARWELL DRIVE AND DC1471'GO 0.2 MILE TO CROSS STREET, TURN LEFT AND GO WEST FOR 0.1 DC1471'MILE TO THE END OF PAVEMENT, CONTINUE WEST ABOUT 100 FEET DC1471'THEN RIGHT ON DIRT ROAD FOR 0.15 MILE TO FORKS, KEEP LEFT DC1471'FORK AND GO NORTHERLY FOR 0.05 MILE TO A TRACK ROAD LEFT, DC1471'TURN LEFT AND FOLLOW BLADED ROAD WESTERLY UP STEEP HILL DC1471'FOR 0.7 MILE TO A BLADED SIDE ROAD RIGHT, TURN RIGHT AND DC1471'GO 0.5 MILE UP STEEP ROCKY BLADED ROAD TO TOP OF HILL AND DC1471'STATION. (FOUR WHEEL DRIVE.) DC1471' DC1471'STATION MARK, A STANDARD TRIANGULATION STATION DISK CEMENTED DC1471'IN A DRILL HOLE IN OUTCROPPING BEDROCK. THE STAMPING DC1471'IS OBLITERATED. THE MARK IS ON THE HIGHEST PART OF HILL AND DC1471'PROJECTS ABOUT 5 INCHES ABOVE THE SURROUNDING AREA. DC1471' DC1471'REFERENCE MARK DRILL HOLE, A 1/2 INCH DRILL HOLE ON THE DC1471'SOUTH SIDE OF A LARGE BOULDER WHICH IS CRACKED IN HALF. THE DC1471'BOULDER IS NORTHEAST OF THE STATION, PROJECTS ABOUT 15 INCHES DC1471'ON THE SOUTH SIDE AND ABOUT 3 FEET ON THE NORTH SIDE. DC1471' DC1471'REFERENCE MARK 2, A STANDARD REFERENCE DISK SET IN A DRILL DC1471'HOLE IN OUTCROPPING BEDROCK. THE STAMPING IS OBLITERATED. DC1471'THE MARK PROJECTS ABOUT 15 INCHES. DC1471' DC1471'SEVERAL VISIBLE OBJECTS MAY BE USED AS AN AZIMUTH. DC1471' DC1471'STATION MARK AND REFERENCE MARK 2 ARE AS DESCRIBED. DC1471' DC1471'OBSERVATIONS WERE TAKEN FROM A 4 FOOT STAND. DC1471' DC1471'HEIGHT OF LIGHT ABOVE STATION MARK 1 METERS. DC1471' DC1471 DC1471 STATION RECOVERY (1987) DC1471 DC1471'RECOVERY NOTE BY LOCAL SURVEYOR (INDIVIDUAL OR FIRM) 1987 (GAH) DC1471'RECOVERED IN GOOD CONDITION.