National Geodetic Survey, Retrieval Date = JANUARY 1, 2003 DX4908 *********************************************************************** DX4908 DESIGNATION - OCOTILLO DX4908 PID - DX4908 DX4908 STATE/COUNTY- CA/SAN DIEGO DX4908 USGS QUAD - SHELL REEF (1976) DX4908 DX4908 *CURRENT SURVEY CONTROL DX4908 ___________________________________________________________________ DX4908* NAD 83(1992)- 33 07 52.24922(N) 116 06 32.52226(W) ADJUSTED DX4908* NAVD 88 - 140.3 (meters) 460. (feet) VERTCON DX4908 ___________________________________________________________________ DX4908 EPOCH DATE - 1991.35 DX4908 LAPLACE CORR- -5.19 (seconds) DEFLEC99 DX4908 GEOID HEIGHT- -33.58 (meters) GEOID99 DX4908 DX4908 HORZ ORDER - FIRST DX4908 DX4908.The horizontal coordinates were established by classical geodetic methods DX4908.and adjusted by the National Geodetic Survey in June 1996. DX4908.The horizontal coordinates are valid at the epoch date displayed above. DX4908.The epoch date for horizontal control is a decimal equivalence DX4908.of Year/Month/Day. DX4908 DX4908.The NAVD 88 height was computed by applying the VERTCON shift value to DX4908.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) DX4908 DX4908.The Laplace correction was computed from DEFLEC99 derived deflections. DX4908 DX4908.The geoid height was determined by GEOID99. DX4908 DX4908; North East Units Scale Converg. DX4908;SPC CA 6 - 606,975.691 2,013,153.675 MT 0.99996037 +0 04 38.9 DX4908;SPC CA 6 - 1,991,386.08 6,604,821.68 sFT 0.99996037 +0 04 38.9 DX4908;UTM 11 - 3,666,182.953 583,108.310 MT 0.99968516 +0 29 13.2 DX4908 DX4908: Primary Azimuth Mark Grid Az DX4908:SPC CA 6 - OCOTILLO AZ MK 021 31 44.3 DX4908:UTM 11 - OCOTILLO AZ MK 021 07 10.0 DX4908 DX4908|---------------------------------------------------------------------| DX4908| PID Reference Object Distance Geod. Az | DX4908| dddmmss.s | DX4908| CE9887 OCOTILLO AZ MK 0213520.1 | DX4908| DX0337 OCOTILLO AZ MK APPROX. 1.0 KM 0213623.2 | DX4908| CE9888 OCOTILLO RM 1 7.592 METERS 07606 | DX4908| CE9889 OCOTILLO RM 2 6.316 METERS 24911 | DX4908|---------------------------------------------------------------------| DX4908 DX4908 SUPERSEDED SURVEY CONTROL DX4908 DX4908 NAD 83(1986)- 33 07 52.25257(N) 116 06 32.51805(W) AD(1984.00) 1 DX4908 NAD 27 - 33 07 52.08800(N) 116 06 29.49400(W) AD( ) 1 DX4908 NGVD 29 - 139.6 (m) 458. (f) VERT ANG DX4908 DX4908.Superseded values are not recommended for survey control. DX4908.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. DX4908.See file dsdata.txt to determine how the superseded data were derived. DX4908 DX4908_U.S. NATIONAL GRID SPATIAL ADDRESS: 11SNS8310866183(NAD 83) DX4908_MARKER: Z = SEE DESCRIPTION DX4908_SETTING: 0 = UNSPECIFIED SETTING DX4908 DX4908 HISTORY - Date Condition Report By DX4908 HISTORY - 1939 MONUMENTED CGS DX4908 HISTORY - 1941 SEE DESCRIPTION CGS DX4908 HISTORY - 1955 SEE DESCRIPTION CGS DX4908 HISTORY - 1969 SEE DESCRIPTION CGS DX4908 HISTORY - 1974 SEE DESCRIPTION NGS DX4908 HISTORY - 1976 SEE DESCRIPTION NGS DX4908 DX4908 STATION DESCRIPTION DX4908 DX4908'DESCRIBED BY COAST AND GEODETIC SURVEY 1939 (FGJ) DX4908'STATION IS ABOUT 30 MILES WNW OF WESTMORLAND AND ABOUT 1.8 DX4908'MILES SE OF OCOTILLO ON THE HIGHEST POINT OF THE LOW SAND HILLS. DX4908' DX4908'STATION AND REFERENCE MARKS ARE STANDARD BRONZE DISKS CEMENTED DX4908'IN THE TOPS OF 4-INCH SOIL PIPES. THERE IS NO UNDERGROUND DX4908'MARK. DX4908' DX4908'AZIMUTH MARK IS CEMENTED IN THE TOP OF A 4-INCH SOIL PIPE, DX4908'AND IS 100 FEET S OF U.S. HIGHWAY 78 AT A POINT 1.4 MILES W DX4908'OF THE SAN DIEGO COUNTY LINE, AND 1.65 MILES E OF OCOTILLO. DX4908' DX4908'TO REACH STATION FROM OCOTILLO, GO S ON THE ROAD AT THE W DX4908'SIDE OF THE SERVICE STATION FOR 0.8 MILE, TURN LEFT, E, GO DX4908'0.55 MILE. THENCE SSE ON A DIM TRACK ROAD UP THE SANDY WASH DX4908'1.0 MILE TO THE END OF TRUCK TRAVEL AT THE S SIDE OF THE PEAK. DX4908'PACK UP THE HILL TO THE LEFT, ABOUT 100 YARDS TO THE HIGHEST DX4908'POINT AND STATION. DX4908 DX4908 STATION RECOVERY (1941) DX4908 DX4908'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1941 (JCS) DX4908'STATION WAS FOUND IN GOOD CONDITION. IT IS ON HIGHEST POINT DX4908'OF THE NEAREST AND HIGHEST SANDHILL TO THE SE OF OCOTILLO DX4908'IN A GROUP OF LOW SANDHILLS. DX4908' DX4908'STATION MARK IS A STANDARD BRONZE DISK STAMPED OCOTILLO DX4908'1939 SET IN CEMENT IN TOP OF A 4-INCH CAST-IRON PIPE, THE DX4908'TOP OF WHICH IS 5 INCHES ABOVE THE SURFACE OF THE GROUND. DX4908' DX4908'REFERENCE MARK NO. 1 IS ON THE RIDGE OF THE HILL. IT IS A DX4908'STANDARD DISK CEMENTED INTO THE TOP OF A 4-INCH CAST-IRON DX4908'PIPE, THE TOP OF WHICH IS 3 INCHES ABOVE THE SURFACE OF THE DX4908'GROUND. IT IS STAMPED OCOTILLO NO. 1, 1939. DX4908' DX4908'REFERENCE MARK NO. 2 IS ON THE RIDGE OF THE HILL. IT IS A DX4908'STANDARD DISK CEMENTED INTO THE TOP OF A 4-INCH CAST-IRON PIPE, DX4908'THE TOP OF WHICH IS 4 INCHES ABOVE THE SURFACE OF THE GROUND. DX4908'IT IS STAMPED OCOTILLO NO. 2, 1939. DX4908' DX4908'THE AZIMUTH MARK IS A STANDARD DISK CEMENTED INTO THE TOP OF DX4908'A 4-INCH CAST-IRON PIPE, THE TOP OF WHICH IS 6 INCHES ABOVE DX4908'THE SURFACE OF THE GROUND. IT IS LOCATED ABOUT 100 FEET S OF DX4908'STATE HIGHWAY 78 AT A POINT 1.4 MILES W OF SAN DIEGO COUNTY DX4908'LINE, AND 1.5 MILES E OF OCOTILLO. IT IS STAMPED OCOTILLO DX4908'1939. DX4908' DX4908'TO REACH FROM OCOTILLO ON STATE HIGHWAY 78, GO S ON THE ROAD DX4908'AT THE W SIDE OF THE SERVICE STATION AND SMALL GROUP OF DX4908'BUILDINGS FOR 0.8 MILE, TURN LEFT, E, AND GO 0.6 MILE. THENCE DX4908'GO IN A GENERAL SOUTH SOUTHEASTERLY DIRECTION ON A DIM TRUCK DX4908'ROAD UP THE SAND WASH FOR 0.6 MILE TO THE END OF TRUCK TRAVEL DX4908'ON THE S SIDE OF THE PEAK. PACK UP THE HILL TO THE LEFT ABOUT DX4908'100 YARDS TO THE HIGHEST POINT OF THE SAND HILL AND STATION. DX4908 DX4908 STATION RECOVERY (1955) DX4908 DX4908'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1955 (LSB) DX4908'THE STATION AND ALL MARKS WERE RECOVERED IN GOOD CONDITION AND DX4908'AS DESCRIBED. A FOUR WHEEL DRIVE VEHICLE WAS DRIVEN TO THE DX4908'STATION. DX4908 DX4908 STATION RECOVERY (1969) DX4908 DX4908'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1969 (BKM) DX4908'THE STATION MARK, REFERENCE MARKS 1 AND 2 AND THE AZIMUTH MARK DX4908'WERE RECOVERED IN GOOD CONDITION. DUE TO ROAD CHANGES IN DX4908'THE VICINITY, A NEW AND COMPLETE DESCRIPTION FOLLOWS. DX4908' DX4908'THE STATION IS LOCATED ABOUT 2 MILES SOUTHEAST OF OCOTILLO DX4908'WELLS, 0.5 MILE SOUTH OF STATE HIGHWAY 78, ON THE SUMMIT OF DX4908'A LOW, EAST-WEST, SANDHILL RIDGE WHICH IS THE HIGHEST IN THE DX4908'VICINITY. DX4908' DX4908'TO REACH THE STATION FROM THE JUNCTION OF A PAVED ROAD SOUTH DX4908'AND STATE HIGHWAY 78, IN OCOTILLO WELLS, GO SOUTH ON THE DX4908'PAVED ROAD FOR 0.8 MILE TO A SIDE ROAD LEFT. TURN LEFT AND DX4908'GO EASTERLY ON A SAND ROAD FOR 0.5 MILE TO A FIVE-WAY INTERSECTION DX4908'OF SAND ROADS. TAKE THE RIGHT FORK OF TWO AND GO EASTERLY DX4908'ON A SAND ROAD FOR 0.35 MILE TO A FORK. TAKE THE LEFT FORK DX4908'AND GO 0.2 MILE TO A FORK. TAKE THE LEFT FORK, SAND ROAD, DX4908'UPHILL AND GO 0.55 MILE TO THE TOP OF A SADDLE. BEAR SHARP DX4908'LEFT, UP STEEP HILL 0.1 MILE TO THE STATION ON HIGHEST PART DX4908'OF RIDGE. DX4908' DX4908'STATION MARK IS A STANDARD DISK STAMPED OCOTILLO 1939, SET DX4908'IN THE TOP OF A CONCRETE FILLED, 4-INCH CAST IRON PIPE WHICH DX4908'PROJECTS 10 INCHES. IT IS 5.5 FEET NORTH OF A METAL WITNESS DX4908'POST. DX4908' DX4908'REFERENCE MARK NO. 1, A STANDARD DISK STAMPED OCOTILLO NO DX4908'1 1939, IS SET IN THE TOP OF A CONCRETE FILLED, 4-INCH CAST DX4908'IRON PIPE WHICH PROJECTS 5 INCHES. IT IS ON THE EAST SLOPE DX4908'OF THE RIDGE. DX4908' DX4908'REFERENCE MARK NO. 2, A STANDARD DISK STAMPED OCOTILLO NO 2 DX4908'1939, IS SET IN THE TOP OF A CONCRETE FILLED, 4-INCH CAST DX4908'IRON PIPE WHICH PROJECTS 5 INCHES. IT IS 21.0 FEET WEST OF THE DX4908'METAL WITNESS POST. DX4908' DX4908'AZIMUTH MARK IS A STANDARD DISK STAMPED OCOTILLO 1939, SET DX4908'IN THE TOP OF A CONCRETE FILLED, 4-INCH CAST IRON PIPE WHICH DX4908'PROJECTS 1 FOOT. IT IS 100 FEET SOUTH OF THE CENTERLINE OF DX4908'STATE HIGHWAY 78, 58.5 FEET SOUTH OF A STONE HISTORICAL MARKER, DX4908'3.3 FEET EAST OF A METAL WITNESS POST AND 3.0 FEET WEST-NORTHWEST DX4908'OF A METAL SURVEY MONUMENT MARKER. DX4908' DX4908'TO REACH THE AZIMUTH MARK FROM THE JUNCTION MENTIONED ABOVE, DX4908'GO EAST ON HIGHWAY 78 FOR 1.7 MILES TO THE MARK ON THE RIGHT. DX4908' DX4908'NOTE--A FOUR-WHEEL DRIVE VEHICLE REQUIRED TO REACH THE STATION. DX4908' DX4908'AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--2 MILES DX4908'SE OF OCOTILLO WELLS DX4908 DX4908 STATION RECOVERY (1974) DX4908 DX4908'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1974 (CLN) DX4908'THE DESERT IN THE OCOTILLO WELLS AREA IS LACED WITH TRACK DX4908'ROADS OF VARIOUS OFF-ROAD VEHICLES. A TRACK ROAD CROSSES THE DX4908'STATION HILL SUMMIT AND THE STATION PIPE MARK WAS RECOVERED DX4908'LYING UPON THE SURFACE OF THE GROUND NEAR AN AREA OF OIL DX4908'SOAKED GROUND. THE AZIMUTH MARK PIPE WAS FOUND TO HAVE BEEN DX4908'BROKEN OFF AT GROUND LEVEL. REFERENCE MARKS 1 AND 2 WERE DX4908'RECOVERED IN GOOD CONDITION AND AS DESCRIBED IN 1939 THROUGH DX4908'1969. A C AND GS AZIMUTH MARK DISK WAS RESET IN THE ORIGINAL DX4908'PIPE IDENTICAL WITH ITS ORIGINAL POSITION. USING THE 1969 DX4908'DISTANCES AND DIRECTIONS TO THE REFERNECE MARKS, THE PIPE DX4908'STATION MARK WAS RE-ESTABLISHED, COMPLETE WITH DX4908'UNDERGROUND-STATION MARK, IN ITS ORIGINAL POSITION. ADDITIONAL DX4908'DISTANCE AND DIRECTION OBSERVATIONS VERIFIED THE DX4908'RE-ESTABLISHED POSITION. DX4908' DX4908'THE WIND SOCK AT THE OCOTILLO WELLS AIRPORT, OBSERVED UPON DX4908'IN 1939, WAS FOUND TO HAVE BEEN MOVED TO A NEW LOCATION. DX4908' DX4908'A COMPLETE DESCRIPTION FOLLOWS--THE STATION IS LOCATED ABOUT DX4908'1-1/2 MILES SOUTHEAST OF OCOTILLO WELLS, 3/4 MILE SOUTH OF DX4908'STATE HIGHWAY 78, ON THE SUMMIT OF A LOW EAST-WEST RIDGE DX4908'WHICH IS THE HIGHEST IN THE VICINITY. ANOTHER EAST-WEST DX4908'RIDGE LIES PARALLEL TO, AND ABOUT 0.3 MILE SOUTH OF, THE DX4908'STATION RIDGE. DX4908' DX4908'TO REACH THE STATION FROM THE T-JUNCTION OF STATE HIGHWAY DX4908'78 AND SPLIT MOUNTAIN ROAD IN OCOTILLO WELLS, DRIVE SOUTH ON DX4908'THE ROAD FOR 0.8 MILE TO A SAND ROAD ON THE LEFT. TURN LEFT DX4908'AND DRIVE EAST ALONG THE SOUTH SIDE OF A GROVE OF TREES AND DX4908'AN EAST-WEST POWERLINE FOR 0.5 MILE TO A FIVE-WAY ROAD DX4908'INTERSECTION. TAKE THE SOUTH ONE OF TWO EASTERLY BOUND SAND DX4908'ROADS AND CONTINUE EAST-SOUTHEAST UP THE BOTTOM OF A SHALLOW DX4908'VALLEY FOR 0.8 MILE TO A Y-FORK. TAKE THE LEFT FORK AND DX4908'CONTINUE EAST-NORTHEAST UP THE VALLEY BOTTOM FOR 0.05 MILE DX4908'TO A Y-FORK. TAKE THE LEFT FORK AND CONTINUE NORTHEASTERLY DX4908'UP THE SAND ROAD FOR 0.2 MILE TO THE SUMMIT OF A SADDLE IN DX4908'A RIDGE. CONTINUE NORTH FOR ABOUT 100 FEET, THENCE TURN DX4908'BACK SHARP LEFT ONTO THE CREST OF THE RIDGE AND DRIVE DX4908'SOUTHWESTERLY FOR 0.1 MILE TO THE HIGHEST POINT AND THE DX4908'STATION. DX4908' DX4908'THE SURFACE-STATION MARK IS A C AND GS TRIANGULATION DISK, DX4908'STAMPED OCOTILLO 1939 1974, SET IN THE TOP OF A 4 INCHES IN DX4908'DIAMETER IRON PIPE THAT IS FILLED WITH CONCRETE, CEMENTED IN DX4908'THE GROUND AND PROJECTS 3 INCHES ABOVE THE GROUND SURFACE. DX4908'IT IS ON THE SOUTH EDGE OF THE CREST OF THE RIDGE AND 5.5 DX4908'FEET NORTH OF A METAL WITNESS POST WITH SIGN. THE DX4908'UNDERGROUND-STATION IS MARKED BY A NGS HORIZONTAL CONTROL DX4908'DISK, STAMPED OCOTILLO 1939 1974, SET IN THE TOP OF A MASS DX4908'OF CONCRETE 32 INCHES BELOW THE GROUND SURFACE. DX4908' DX4908'REFERENCE MARK 1, STAMPED OCOTILLO NO 1 1939, IS A C AND GS DX4908'REFERENCE MARK DISK SET IN THE TOP OF A 4 INCHES IN DIAMETER DX4908'IRON PIPE THAT IS FILLED WITH CONCRETE AND PROJECTS 4 INCHES DX4908'ABOVE THE GROUND SURFACE. IT IS ON THE CREST OF THE STATION DX4908'RIDGE AND ABOUT 1-1/2 FEET LOWER THAN THE STATION. DX4908' DX4908'REFERENCE MARK 2, STAMPED OCOTILLO NO 2 1939, IS A C AND GS DX4908'REFERENCE MARK DISK SET IN THE TOP OF A 4 INCHES IN DIAMETER DX4908'IRON PIPE THAT IS FILLED WITH CONCRETE AND PROJECTS 5 INCHES DX4908'ABOVE THE GROUND SURFACE. IT IS ON THE CREST OF THE RIDGE, DX4908'21 FEET WEST OF THE METAL WITNESS POST AND ABOUT 1-FOOT HIGHER DX4908'THAN THE STATION. DX4908' DX4908'THE AZIMUTH MARK IS A STANDARD C AND GS DISK, STAMPED OCOTILLO DX4908'1939 RESET 1974, SET IN THE TOP OF A 4 INCHES IN DIAMETER DX4908'IRON PIPE WHICH IS SURROUNDED BY A 10 INCHES IN DIAMETER DX4908'CONCRETE POST AND PROJECTS 2 INCHES ABOVE THE GROUND SURFACE. DX4908'IT IS 100.0 FEET SOUTH OF THE CENTER OF STATE HIGHWAY 78, DX4908'58.5 FEET SOUTH OF A STONE AND CONCRETE CALIFORNIA HISTORICAL DX4908'MONUMENT AND 1.0 FOOT WEST OF A METAL WITNESS POST WITH SIGN DX4908'ATTACHED. DX4908' DX4908'TO REACH THE AZIMUTH MARK FROM THE T-JUNCTION OF STATE HIGHWAY DX4908'78 AND SPLIT MOUNTAIN ROAD IN OCOTILLO WELLS, DRIVE EAST ON DX4908'THE HIGHWAY FOR 1.75 MILES TO A SUMMIT, AND A HISTORICAL DX4908'SIGN AND THE AZIMUTH MARK ON THE RIGHT. DX4908' DX4908'NOTE--ALL PROJECTING PIPE MARKS WERE PAINTED BRIGHT RED FOR DX4908'PROTECTION AGAINST DAMAGE BY OFF-ROAD VEHICLES. A FOUR-WHEEL DX4908'DRIVE VEHICLE IS REQUIRED TO REACH THE STATION. DX4908' DX4908'AZIMUTH TO AZIMUTH MARK DETERMINED FROM POST EARTHQUAKE DATA. DX4908' DX4908'AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--1-1/2 MILES DX4908'SOUTHEAST OF OCOTILLO WELLS DX4908 DX4908 STATION RECOVERY (1976) DX4908 DX4908'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1976 (RS) DX4908'THE STATION AND ALL MARKS WERE FOUND IN GOOD CONDITION AS DX4908'DESCRIBED. A FOUR-WHEEL DRIVE IS NEEDED TO REACH THE STATION. DX4908' DX4908'THE STATION WAS VISITED BY THE RECONNAISSANCE MAN ONLY AND DX4908'WAS NOT OCCUPIED. NO MEASUREMENTS WERE MADE. DX4908' DX4908'AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN DX4908'1.5 MILES SOUTHEAST OF OCOTILLO WELLS.