National Geodetic Survey, Retrieval Date = APRIL 25, 2000 DA1510 *********************************************************************** DA1510 DESIGNATION - SIERRA DEL AJO DA1510 PID - DA1510 DA1510 STATE/COUNTY- AZ/PIMA DA1510 USGS QUAD - MOUNT AJO DA1510 DA1510 *CURRENT SURVEY CONTROL DA1510 ___________________________________________________________________ DA1510* NAD 83(1992)- 32 01 36.37739(N) 112 41 25.83409(W) ADJUSTED DA1510* NAVD 88 - 1466.3 (meters) 4811. (feet) VERTCON DA1510 ___________________________________________________________________ DA1510 LAPLACE CORR- 2.83 (seconds) DEFLEC99 DA1510 GEOID HEIGHT- -31.56 (meters) GEOID99 DA1510 DA1510 HORZ ORDER - FIRST DA1510 DA1510.The horizontal coordinates were established by classical geodetic methods DA1510.and adjusted by the National Geodetic Survey in August 1993. DA1510 DA1510.The NAVD 88 height was computed by applying the VERTCON shift value to DA1510.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) DA1510 DA1510.The Laplace correction was computed from DEFLEC99 derived deflections. DA1510 DA1510.The geoid height was determined by GEOID99. DA1510 DA1510; North East Units Scale Converg. DA1510;SPC AZ C - 114,097.120 140,264.747 MT 0.99996587 -0 24 37.4 DA1510;UTM 12 - 3,544,652.291 340,358.546 MT 0.99991430 -0 53 48.1 DA1510 DA1510: Primary Azimuth Mark Grid Az DA1510:SPC AZ C - SIERRA DEL AJO AZ MK 134 51 55.1 DA1510:UTM 12 - SIERRA DEL AJO AZ MK 135 21 05.8 DA1510 DA1510|---------------------------------------------------------------------| DA1510| PID Reference Object Distance Geod. Az | DA1510| dddmmss.s | DA1510| SIERRA DEL AJO RM 37.380 METERS 01125 | DA1510| SIERRA DEL AJO RM 1 34.924 METERS 01132 | DA1510| DA1507 KERWO WHITE CHAPEL CROSS APPROX.13.0 KM 0713628.7 | DA1510| SIERRA DEL AJO RM 2 6.492 METERS 12435 | DA1510| SIERRA DEL AJO AZ MK 1342717.7 | DA1510|---------------------------------------------------------------------| DA1510 DA1510 SUPERSEDED SURVEY CONTROL DA1510 DA1510 NAD 83(1986)- 32 01 36.36660(N) 112 41 25.83544(W) AD( ) 1 DA1510 NAD 27 - 32 01 36.11600(N) 112 41 23.31200(W) AD( ) 1 DA1510 NGVD 29 - 1465.5 (m) 4808. (f) VERT ANG DA1510 DA1510.Superseded values are not recommended for survey control. DA1510.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. DA1510.See file dsdata.txt to determine how the superseded data were derived. DA1510 DA1510 HISTORY - Date Condition Recov. By DA1510 HISTORY - 1920 MONUMENTED CGS DA1510 HISTORY - 1936 GOOD CGS DA1510 HISTORY - 1962 GOOD USGS DA1510 DA1510 STATION DESCRIPTION DA1510 DA1510'DESCRIBED BY COAST AND GEODETIC SURVEY 1936 DA1510'ON THE HIGHEST PART OF THE SIERRA DEL AJOS. TO REACH FROM AJO, DA1510'FOLLOW THE AJO-SELLS ROAD EAST FOR 15.5 MILES TO A CROSS DA1510'ROAD WITH A SIGN READING POSO REDONDO. TURN RIGHT HERE AND DA1510'FOLLOW THIS ROAD SOUTH TO THE TOWN OF KERWO. FROM THERE GO DA1510'SOUTHWEST TO A CORRAL ON A SMALL HILL APPROXIMATELY 0.3 DA1510'MILE FROM A CHURCH. AT THE CORRAL TAKE THE ROAD ON THE SOUTH DA1510'AND FOLLOW FOR 1.7 MILES. TURN LEFT ON THE OLD DIM ROAD AND DA1510'FOLLOW IT TO THE FOOT OF THE HILL HEADING DIRECTLY FOR THE DA1510'WIDE-MOUTHED CANYON NEAR THE SOUTH END OF THE MOUNTAIN. THIS DA1510'ROAD IS ROUGH AND WINDING. ABOUT THE CENTER OF THE DA1510'WIDE MOUTH AND NEAR THE LONG SLOPING RIDGE ON THE LEFT DA1510'(SOUTH) LEAVE TRUCK AND FOLLOW THIS RIDGE UP TO A HIGH DA1510'ROCK LEDGE ON THE TOP OF THE RIDGE. TURN RIGHT AND FOLLOW DA1510'THE FOOT OF CLIFF, THEN CLIMB HIGHER TO THE SUMMIT OF DA1510'RIDGE, FOLLOW THE RIDGE AROUND SOUTHWEST TO THE HIGHEST DA1510'POINT WHERE THE STATION WILL BE FOUND ON THE TOP OF A HUGE ROCK DA1510'JUST SOUTH AND ABOUT 50 YARDS FROM A POINT WHICH IS ABOUT DA1510'20 FEET HIGHER THAN THE STATION. MARKED BY A STANDARD DA1510'BRONZE DISK. DISK IS ERRONEOUSLY DA1510'STAMPED SIERRA DE AJO. REFERENCE MARK NO. 1, A STANDARD DA1510'BRONZE REFERENCE DISK, IS 34.924 METERS (114.58 DA1510'FEET) FROM STATION N 11 DEG 32 MIN E. REFERENCE MARK DA1510'NO. 2, A STANDARD BRONZE REFERENCE DISK, IS DA1510'6.492 METERS (21.30 FEET) FROM STATION S 55 DEG DA1510'25 MIN E. THE AZIMUTH MARK IS ON THE RIDGE THAT EXTENDS SOUTHEAST DA1510'AND SOUTH FROM THE CREST ON WHICH THE STATION IS LOCATED DA1510'AND IS 15 FEET NORTHWEST OF A GENERAL LAND OFFICE PIPE STAMPED DA1510'P.I.R. 10M. 1929. THE AZIMUTH MARK WAS STAMPED SIERRA DEL AJO DA1510'1920-1936. IT IS ONE FOURTH MILE FROM STATION DA1510'S 45 DEG 33 MIN E. DA1510 DA1510 STATION RECOVERY (1962) DA1510 DA1510'RECOVERY NOTE BY US GEOLOGICAL SURVEY 1962 DA1510'RECOVERED AS DESCRIBED BY NGS. ALL MARKS IN GOOD CONDITION. DA1510'STATION IS ON HIGHEST POINT OF SOUTH END OF MOUNTAIN AT ABOUT DA1510'SAME ELEVATION AS HIGHEST POINT.