National Geodetic Survey, Retrieval Date = APRIL 23, 2000 DA1537 *********************************************************************** DA1537 DESIGNATION - AJO 2 DA1537 PID - DA1537 DA1537 STATE/COUNTY- AZ/PIMA DA1537 USGS QUAD - AJO SOUTH DA1537 DA1537 *CURRENT SURVEY CONTROL DA1537 ___________________________________________________________________ DA1537* NAD 83(1992)- 32 19 25.07670(N) 112 50 34.22602(W) ADJUSTED DA1537* NAVD 88 - 918.1 (meters) 3012. (feet) VERTCON DA1537 ___________________________________________________________________ DA1537 LAPLACE CORR- 0.28 (seconds) DEFLEC99 DA1537 GEOID HEIGHT- -31.62 (meters) GEOID99 DA1537 DA1537 HORZ ORDER - SECOND DA1537 DA1537.The horizontal coordinates were established by classical geodetic methods DA1537.and adjusted by the National Geodetic Survey in August 1993. DA1537 DA1537.The NAVD 88 height was computed by applying the VERTCON shift value to DA1537.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) DA1537 DA1537.The Laplace correction was computed from DEFLEC99 derived deflections. DA1537 DA1537.The geoid height was determined by GEOID99. DA1537 DA1537; North East Units Scale Converg. DA1537;SPC AZ C - 147,127.793 126,158.802 MT 0.99999374 -0 29 42.9 DA1537;UTM 12 - 3,577,800.756 326,535.140 MT 0.99997107 -0 59 08.2 DA1537 DA1537: Primary Azimuth Mark Grid Az DA1537:SPC AZ C - DARBY 034 52 35.3 DA1537:UTM 12 - DARBY 035 22 00.6 DA1537 DA1537|---------------------------------------------------------------------| DA1537| PID Reference Object Distance Geod. Az | DA1537| dddmmss.s | DA1537| DA1536 AJO RM 1 9.141 METERS 01534 | DA1537| DA1534 DARBY APPROX. 3.9 KM 0342252.4 | DA1537| DA1535 AJO RM 2 11.986 METERS 10410 | DA1537| DA1268 CARDIGAN APPROX. 7.8 KM 3053901.4 | DA1537| DA1528 AJO AFB BEACON APPROX.14.2 KM 3545838.1 | DA1537|---------------------------------------------------------------------| DA1537 DA1537 SUPERSEDED SURVEY CONTROL DA1537 DA1537 NAD 83(1986)- 32 19 25.06495(N) 112 50 34.22995(W) AD( ) 2 DA1537 NAD 27 - 32 19 24.84570(N) 112 50 31.68482(W) AD( ) 2 DA1537 NGVD 29 - 917.4 (m) 3010. (f) VERT ANG DA1537 DA1537.Superseded values are not recommended for survey control. DA1537.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. DA1537.See file dsdata.txt to determine how the superseded data were derived. DA1537 DA1537_MARKER: DS = TRIANGULATION STATION DISK DA1537_SETTING: 66 = SET IN ROCK OUTCROP DA1537_STABILITY: A = MOST RELIABLE AND EXPECTED TO HOLD DA1537+STABILITY: POSITION/ELEVATION WELL DA1537 DA1537 HISTORY - Date Condition Recov. By DA1537 HISTORY - 1962 MONUMENTED USGS DA1537 HISTORY - 1975 GOOD USGS DA1537 HISTORY - 1977 GOOD NGS DA1537 HISTORY - 1979 GOOD AZDT DA1537 DA1537 STATION DESCRIPTION DA1537 DA1537'DESCRIBED BY US GEOLOGICAL SURVEY 1962 DA1537'LOCATED ABOUT 3 MI SE. OF AJO. ON SUMMIT OF BLACK MOUNTAIN. DA1537' DA1537'REACHED BY HELICOPTER. DA1537' DA1537'STATION MARK--STANDARD TABLET STAMPED---AJO 2 1962---, IN ROCK DA1537'OUTCROP IN APPROXIMATE LOCATION OF ORIGINAL STATION. DA1537' DA1537'RM 1--NGS RM DISK STAMPED---AJO 1920 NO 1 1935---, IN ROCK. DA1537' DA1537'RM 2--NGS RM DISK STAMPED---AJO 1920 NO 2 1935---, IN ROCK. DA1537 DA1537 STATION RECOVERY (1975) DA1537 DA1537'RECOVERY NOTE BY US GEOLOGICAL SURVEY 1975 DA1537'THE STATION MARK, REFERENCE MARK 1 AND 2 WERE RECOVERED AND FOUND IN DA1537'GOOD CONDITION. THE STATION MARK IS A USGS BENCH MARK DISK STAMPED DA1537'AJO NO. 2 1962 AND IS CEMENTED IN BED ROCK. REFERENCE MARK 1 AND 2 DA1537'ARE USC AND GS DISKS STAMPED RM 1 AND 2 1920 1935 RESPECTIVELY AND DA1537'CEMENTED IN BED ROCK, RM 1 IS ABOUT 8 FEET LOWER THAN STATION AND DA1537'RM 3 ABOUT 3 FEET LOWER. DA1537' DA1537'TO REACH THE STATION FROM CENTER OF AJO, GO SOUTHEAST ON STATE ROUTE DA1537'85-86 FOR ABOUT 2.55 MILES TO DARBY WELL RD. TURN RIGHT (SOUTH) ON DA1537'DARBY WELL RD. FOR 1.9 MILES TO END OF PAVEMENT AND A ROAD FORK, DA1537'TAKE LEFT FORK FOR 0.2 MILES TO CORRALS ON THE LEFT, CONTINUE ON DA1537'MAIN TRAVELED ROAD FOR 0.5 MILES TO A DIM TRACK ROAD THAT LEADS DA1537'EAST THEN SOUTHEAST. TURN LEFT AND CONTINUE FOR 0.6 MILES TO BASE DA1537'OF FOOT HILLS AND END OF TRACK ROAD. AT THIS POINT YOU ARE LOOKING DA1537'INTO CLIFFS AND A LOW RIDGE LEADING WEST. PACK TOWARD THE CLIFFS DA1537'AND A SMALL SADDLE BETWEEN THE RIDGE AND BASE OF MOUNTAIN. FROM DA1537'THE SADDLE, PACK OVER THE CLIFFS ON THE RIDGE AND CONTINUE IN THE DA1537'MAIN CANYON TO YOUR LEFT TO THE SADDLE JUST SOUTH OF THE STATION DA1537'APPROX. 1 HR. 15 MINUTE PACK. DA1537' DA1537'AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--3.5 MILES DA1537'SOUTHEAST OF AJO. DA1537' DA1537'HEIGHT OF LIGHT ABOVE STATION MARK 5 FEET. DA1537 DA1537 STATION RECOVERY (1977) DA1537 DA1537'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1977 DA1537'THE STATION MARK, REFERENCE MARK 2 AND 1 WERE RECOVERED AND FOUND IN DA1537'GOOD CONDITION. DISTANCE TO RM 2 CHECKED WITHIN 8 MM AND RM 1 DA1537'CHECKED WITHIN 5 MM. THE METER DISTANCE TO RM 1 IN THE 1975 DA1537'DESCRIPTION IS IN ERROR BY 0.316 METERS. THE ANGLE BETWEEN REFERENCE DA1537'MARKS CHECKS THE 1975 MEASUREMENT BY 4 SECONDS. DA1537' DA1537'THE 1975 DESCRIPTION IS ADEQUATE. DA1537' DA1537'AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--3.5 MILES DA1537'SOUTHEAST OF AJO. DA1537' DA1537'HEIGHT OF LIGHT ABOVE STATION MARK 5 FEET. DA1537 DA1537 STATION RECOVERY (1979) DA1537 DA1537'RECOVERY NOTE BY ARIZONA DEPARTMENT OF TRANSPORTATION 1979 DA1537'THE STATION, REFERENCE MARKS 1 AND 2 WERE RECOVERED AS DESCRIBED AND DA1537'FOUND IN GOOD CONDITION. THE AZIMUTH MARK WAS NOT FOUND. DA1537' DA1537'TO REACH THE STATION FROM HWY. 85-86 FROM THE PLAZA IN THE CENTER OF DA1537'AJO, TRAVEL SOUTHEAST 2.55 MILES TO DARBY WELL ROAD, TURN RIGHT (SOUTH DA1537'ON DARBY WELL ROAD) 1.9 MILES TO END OF PAVEMENT AND A FORK, TAKE LEFT DA1537'FORK 0.2 MILES TO CORRALS ON LEFT, CONTINUE ON MAIN TRAVELED ROAD 0.1 DA1537'MILE TO TRAIL LEFT WHICH IS DARBY WELL, CONTINUE ON MAIN TRAVELED ROAD DA1537'0.5 MILE TO DIM TRACK ROAD THAT LEADS EAST AND THEN SOUTHEAST, TURN DA1537'LEFT CONTINUE 0.6 MILE TO BASE OF FOOTHILLS AND END OF TRUCK TRAVEL, DA1537'LOOKING INTO CLIFFS AND A LOW RIDGE LEADING WEST, PACK TOWARD THE DA1537'CLIFFS AND A SMALL SADDLE BETWEEN THE RIDGE AND BASE OF MOUNTAIN FROM DA1537'THE SADDLE PACK UP OVER THE CLIFFS ON THE LEDGES AND CONTINUE IN THE DA1537'MAIN CANYON. TO YOUR LEFT, TO THE SADDLE JUST SOUTH OF THE STATION. DA1537'APPROXIMATELY ONE HOUR AND 15 MINUTE PACK.