National Geodetic Survey, Retrieval Date = JANUARY 20, 2002 DX4993 *********************************************************************** DX4993 DESIGNATION - VOLCAN DX4993 PID - DX4993 DX4993 STATE/COUNTY- CA/SAN DIEGO DX4993 USGS QUAD - JULIAN (1988) DX4993 DX4993 *CURRENT SURVEY CONTROL DX4993 ___________________________________________________________________ DX4993* NAD 83(1992)- 33 06 06.72626(N) 116 34 43.95159(W) ADJUSTED DX4993* NAVD 88 - 1632.7 (meters) 5357. (feet) VERTCON DX4993 ___________________________________________________________________ DX4993 EPOCH DATE - 1991.35 DX4993 LAPLACE CORR- -4.60 (seconds) DEFLEC99 DX4993 GEOID HEIGHT- -31.64 (meters) GEOID99 DX4993 DX4993 HORZ ORDER - FIRST DX4993 DX4993.The horizontal coordinates were established by classical geodetic methods DX4993.and adjusted by the National Geodetic Survey in June 1996. DX4993.The horizontal coordinates are valid at the epoch date displayed above. DX4993.The epoch date for horizontal control is a decimal equivalence DX4993.of Year/Month/Day. DX4993 DX4993.The NAVD 88 height was computed by applying the VERTCON shift value to DX4993.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) DX4993 DX4993.The Laplace correction was computed from DEFLEC99 derived deflections. DX4993 DX4993.The geoid height was determined by GEOID99. DX4993 DX4993; North East Units Scale Converg. DX4993;SPC CA 6 - 603,764.454 1,969,302.108 MT 0.99996230 -0 10 50.6 DX4993;SPC CA 6 - 1,980,850.55 6,460,952.00 sFT 0.99996230 -0 10 50.6 DX4993;UTM 11 - 3,662,659.044 539,294.576 MT 0.99961904 +0 13 48.0 DX4993 DX4993: Primary Azimuth Mark Grid Az DX4993:SPC CA 6 - VOLCAN AZ MK 345 35 17.1 DX4993:UTM 11 - VOLCAN AZ MK 345 10 38.5 DX4993 DX4993|---------------------------------------------------------------------| DX4993| PID Reference Object Distance Geod. Az | DX4993| dddmmss.s | DX4993| VOLCAN RM 1 9.227 METERS 18236 | DX4993| VOLCAN RM 2 3.225 METERS 22030 | DX4993| DX4994 AIRWAY BEACON 3 A 13.265 METERS 30812 | DX4993| VOLCAN AZ MK 3452426.5 | DX4993|---------------------------------------------------------------------| DX4993 DX4993 SUPERSEDED SURVEY CONTROL DX4993 DX4993 NAD 83(1986)- 33 06 06.72571(N) 116 34 43.95081(W) AD(1984.00) 1 DX4993 NAD 27 - 33 06 06.56970(N) 116 34 40.88357(W) AD( ) 1 DX4993 NGVD 29 - 1631.9 (m) 5354. (f) VERT ANG DX4993 DX4993.Superseded values are not recommended for survey control. DX4993.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. DX4993.See file dsdata.txt to determine how the superseded data were derived. DX4993 DX4993_MARKER: DS = TRIANGULATION STATION DISK DX4993_SETTING: 66 = SET IN ROCK OUTCROP DX4993 DX4993 HISTORY - Date Condition Report By DX4993 HISTORY - 1939 MONUMENTED CGS DX4993 HISTORY - 1939 GOOD CGS DX4993 HISTORY - 1955 GOOD CGS DX4993 HISTORY - 1959 GOOD CGS DX4993 HISTORY - 1973 GOOD NGS DX4993 DX4993 STATION DESCRIPTION DX4993 DX4993'DESCRIBED BY COAST AND GEODETIC SURVEY 1939 (ACT) DX4993'STATION VOLCAN LIES ON SOUTHEASTERN END OF VOLCAN MOUNTAIN DX4993'RIDGE. POINT IS RATHER FLAT, GRASS-COVERED OPENING WITH DX4993'A SLIGHT GROWTH OF SCRUB-OAK NEAR HIGHEST POINT AND LIES DX4993'3 MILES NE OF JULIAN. POINT SELECTED IS 0.6 MILE SSE OF DX4993'CHIMNEY AND REMAINS OF OLD OBSERVATORY SITE. DX4993' DX4993'STATION MARK IS A STANDARD DISK WEDGED IN A DRILL HOLE IN DX4993'OUTCROPPING BEDROCK AS DESCRIBED. REFERENCE MARKS DX4993'ARE STANDARD BRONZE DISK IN OUTCROPPING BEDROCK AS DESCRIBED. DX4993' DX4993'REFERENCE MARKS ARE STANDARD BRONZE DISKS SET IN BEDROCK DX4993'AND STAMPED VOLCAN (1939). REFERENCE MARK NO. 1 IS ABOUT 2 DX4993'FEET LOWER THAN STATION MARK AND REFERENCE MARK NO. 2 IS DX4993'ABOUT 1 FOOT HIGHER. DX4993' DX4993'STATION MARK IS A STANDARD BRONZE DISK SET IN BEDROCK WHICH DX4993'PROJECTS ABOUT 1 FOOT STAMPED VOLCAN (1939). DX4993' DX4993'REACHED FROM JULIAN POST OFFICE BY GOING N ON MAIN STREET DX4993'ON PAVED ROAD, KEEPING RIGHT FORKS, FOR 2 MILES TO SIGN JULIAN DX4993'2 MILES. TURN RIGHT, GO ABOUT 200 YARDS, TURN LEFT AND GO DX4993'ABOUT 0.3 MILE ON GRAVEL ROAD. THENCE TURN RIGHT, TO FARMHOUSE, DX4993'THROUGH BARNYARD (3 GATES) AND FOLLOW MAIN-TRAVELED ROAD DX4993'TO TOP OF RIDGE AND REMAINS OF OLD OBSERVATORY SITE. THENCE DX4993'TURN RIGHT AND CONTINUE 0.6 MILE SSE ON TRUCK TRACKS TO DX4993'STATION. DRIVE IN DRY WEATHER OTHERWISE A PACK FROM DX4993'FARMHOUSE. DX4993 DX4993 STATION RECOVERY (1939) DX4993 DX4993'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1939 (FGJ) DX4993'ABOUT 2 MILES, AIRLINE, NORTH-NORTHEAST OF JULIAN ON THE DX4993'MOST SOUTHEASTERN PART OF VOLCAN MOUNTAIN, ABOUT 0.6 MILE DX4993'SOUTHEAST OF A CHIMNEY, THE REMAINS OF AN OLD OBSERVATORY DX4993'SITE. DX4993' DX4993'STATION IS REACHED FROM JULIAN POST OFFICE BY GOING EAST DX4993'ON COUNTY OILED ROAD FOR 2.2 MILES TO T AND SIGNS JULIAN 2, DX4993'DESCANSO 25. TURN RIGHT ON DIRT ROAD FOR 0.1 MILE, TURN LEFT DX4993'ON DIRT ROAD FOR 0.3 MILE TO WOODEN GATE ON RIGHT. PASS DX4993'THROUGH GATE AND FOLLOW TRUCK TRAIL LEADING UP MOUNTAIN TO DX4993'TOP AND STATION 2.8 MILES. DX4993' DX4993'STATION IS MARKED BY A STANDARD DISK-SET IN ROCK, AND DX4993'IS STAMPED VOLCAN 1939. DX4993' DX4993'REFERENCE MARKS ARE STANDARD DISKS SET IN ROCK, DX4993'AND STAMPED VOLCAN NO. 1, 1939 AND VOLCAN NO. 2, 1939. DX4993' DX4993'STATION JULIAN WILL SERVE AS AN AZIMUTH TO STATION VOLCAN. DX4993 DX4993 STATION RECOVERY (1955) DX4993 DX4993'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1955 (LSB) DX4993'THE STATION MARK AND REFERENCE MARKS 1 AND 2 WERE RECOVERED DX4993'AS DESCRIBED AND IN GOOD CONDITION. THE DIRECTION CHECKED THE DX4993'1939 DATA TO REFERENCE MARK 1. A LONGER DISTANCE OF 0.009 M. WAS DX4993'NOTED IN THE MEASUREMENT TO REFERENCE MARK 1 IN COMPARISON DX4993'WITH THE 1939 DATA. THE 1955 COMPUTED SLOPE DISTANCE TO DX4993'HORIZONTAL IS BELIEVED TO BE THE MORE ACCURATE. A SHORTER DX4993'DISTANCE OF 0.008 M. WAS NOTED IN THE MEASUREMENT TO REFERENCE DX4993'MARK 2. A DIFFERENCE WAS NOTED IN THE DIRECTION IN COMPARISON DX4993'WITH THE 1939 DATA. THE 1955 MEASUREMENT WAS CHECKED IN THE DX4993'FIELD. AN AZIMUTH MARK WAS ESTABLISHED. THE PREVIOUS DX4993'DESCRIPTION OF THE ROUTE TO THE STATION IS OBSOLETE. THERE DX4993'HAS BEEN A CIVIL AERONAUTICS AIRWAY BEACON ERECTED NEAR DX4993'THE STATION. A COMPLETE DESCRIPTION FOLLOWS-- DX4993' DX4993'THE STATION IS LOCATED ABOUT 2 MI. (AIRLINE) N-NE OF JULIAN, DX4993'ON THE SE END OF THE VOLCAN MOUNTAIN RIDGE, AT ITS HIGHEST DX4993'PART. THE STATION IS INSIDE THE ENCLOSURE OF THE VOLCAN DX4993'MOUNTAIN CIVIL AERONAUTICS AIRWAY BEACON, E OF THE BEACON, DX4993'AND ON TOP OF A ROCK OUTCROP. DX4993' DX4993'TO REACH FROM THE POST OFFICE IN JULIAN, GO W-NW AND N ON DX4993'THE COUNTY ROAD (A BLACK-TOP ROAD) FOR 2.1 MI. TO A FOUR-WAY DX4993'INTERSECTION. TURN RIGHT (E) AND GO 0.1 MI. TO A SIDE ROAD DX4993'ON THE LEFT. TURN LEFT (N) AND GO 0.3 MI. TO A LOCKED GATE DX4993'ON THE RIGHT (E) SIDE OF THE ROAD. TURN RIGHT (E) PASSING DX4993'THROUGH THE GATE AND FOLLOW THE WINDING DIRT ROAD PASSING DX4993'THROUGH THREE WIRE GATES IN A GENERAL E DIRECTION FOR 2.0 MI. DX4993'TO A ROAD FORK. DX4993' DX4993'TO REACH THE AZIMUTH MARK, TAKE THE LEFT FORK E THEN N FOR DX4993'0.15 MI. TO A SMALL KNOLL WITH SEVERAL LARGE BOULDERS ON THE DX4993'W SLOPE AND THE AZIMUTH MARK ON THE RIGHT (E) SIDE OF THE DX4993'TRACK ROAD. MARKED BY A WITNESS POST. DX4993' DX4993'TO REACH THE STATION FROM THE ROAD FORK, TAKE THE RIGHT FORK DX4993'AND GO SE FOR 0.6 MI. TO THE TOP OF THE SE END OF THE RIDGE DX4993'AND THE STATION AT THE BEACON MENTIONED ABOVE. A TWO-WHEEL DX4993'DRIVE VEHICLE CAN DRIVE TO THE STATION IN DRY WEATHER. DX4993' DX4993'THE AZIMUTH MARK IS A STANDARD DISK, STAMPED VOLCAN 1939 AND DX4993'SET IN A DRILL HOLE WITH CONCRETE IN THE TOP OF A BOULDER DX4993'PROJECTING 18 IN. IT IS IN THE MOST W ONE OF SEVERAL LARGE DX4993'BOULDERS, 3 FT. W OF A WHITE WITNESS POST, AND 50 FT. E OF DX4993'THE CENTERLINE OF THE N-S TRACK ROAD. IT IS APPROXIMATELY DX4993'0.4 MI. N-NW OF THE STATION. DX4993 DX4993 STATION RECOVERY (1959) DX4993 DX4993'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1959 (LFV) DX4993'STATION AND REFERENCE MARKS RECOVERED IN GOOD CONDITION. DX4993'AZIMUTH MARK NOT SEARCHED FOR. DISTANCES TO REFERENCE MARKS DX4993'CHECKED AND FOUND CORRECT. DESCRIPTION BY LSB IN 1955 RECOVERY DX4993'NOTE ADEQUATE AND CORRECT. DX4993 DX4993 STATION RECOVERY (1973) DX4993 DX4993'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1973 (ATD) DX4993'THE STATION WAS OCCUPIED BY LIGHTKEEPER AND FOUND IN GOOD DX4993'CONDITION EXACTLY AS DESCRIBED. DX4993' DX4993'TO REACH ADEQUATE TO LOCATE STATION. DX4993' DX4993'AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN DX4993'THE STATION IS 2 MILES NORTH-NORTHEAST OF JULIAN.