National Geodetic Survey, Retrieval Date = FEBRUARY 8, 2004 DX4280 *********************************************************************** DX4280 DESIGNATION - SAN JUAN DX4280 PID - DX4280 DX4280 STATE/COUNTY- CA/ORANGE DX4280 USGS QUAD - PRADO DAM (1981) DX4280 DX4280 *CURRENT SURVEY CONTROL DX4280 ___________________________________________________________________ DX4280* NAD 83(1992)- 33 54 49.52093(N) 117 44 17.20455(W) ADJUSTED DX4280* NAVD 88 - 544. (meters) 1785. (feet) SCALED DX4280 ___________________________________________________________________ DX4280 EPOCH DATE - 1991.35 DX4280 X - -2,466,329.754 (meters) COMP DX4280 Y - -4,690,083.059 (meters) COMP DX4280 Z - 3,538,795.933 (meters) COMP DX4280 LAPLACE CORR- 4.67 (seconds) DEFLEC99 DX4280 ELLIP HEIGHT- 509.46 (meters) (06/24/96) GPS OBS DX4280 GEOID HEIGHT- -34.21 (meters) GEOID03 DX4280 DX4280 HORZ ORDER - FIRST DX4280 ELLP ORDER - FOURTH CLASS I DX4280 DX4280.The horizontal coordinates were established by GPS observations DX4280.and adjusted by the National Geodetic Survey in June 1996. DX4280.The horizontal coordinates are valid at the epoch date displayed above. DX4280.The epoch date for horizontal control is a decimal equivalence DX4280.of Year/Month/Day. DX4280 DX4280.The orthometric height was scaled from a topographic map. DX4280 DX4280.The X, Y, and Z were computed from the position and the ellipsoidal ht. DX4280 DX4280.The Laplace correction was computed from DEFLEC99 derived deflections. DX4280 DX4280.The ellipsoidal height was determined by GPS observations DX4280.and is referenced to NAD 83. DX4280 DX4280.The geoid height was determined by GEOID03. DX4280 DX4280; North East Units Scale Converg. DX4280;SPC CA 6 - 694,744.428 1,862,386.227 MT 1.00000523 -0 49 03.9 DX4280;SPC CA 6 - 2,279,340.68 6,110,178.81 sFT 1.00000523 -0 49 03.9 DX4280;SPC CA 5 - 545,928.227 2,024,219.508 MT 1.00002806 +0 08 57.4 DX4280;SPC CA 5 - 1,791,099.52 6,641,126.84 sFT 1.00002806 +0 08 57.4 DX4280;UTM 11 - 3,752,838.687 431,767.394 MT 0.99965739 -0 24 42.6 DX4280 DX4280: Primary Azimuth Mark Grid Az DX4280:SPC CA 6 - SAN JUAN AZ MK 284 33 05.8 DX4280:SPC CA 5 - SAN JUAN AZ MK 283 35 04.5 DX4280:UTM 11 - SAN JUAN AZ MK 284 08 44.5 DX4280 DX4280|---------------------------------------------------------------------| DX4280| PID Reference Object Distance Geod. Az | DX4280| dddmmss.s | DX4280| DX4277 CHINO CALIF INST FOR MEN STACK APPROX. 9.7 KM 0323034.0 | DX4280| DX4284 CHINO CALIF INST FOR MEN TANK APPROX.10.9 KM 0333550.7 | DX4280| DX4279 CALIF INSTITUTE FOR WOMEN TANK APPROX.10.2 KM 0682059.9 | DX4280| CC4920 VOR ONTARIO ONT 0783014.7 | DX4280| DX4269 SIERRA PK MOTOROLA MAST APPROX.10.5 KM 1320149.6 | DX4280| CC3731 SAN JUAN AZ MK 2 1691054.7 | DX4280| CC3734 SAN JUAN RM 3 12.884 METERS 19146 | DX4280| CC3736 SAN JUAN RM 5 11.890 METERS 20931 | DX4280| CC3733 SAN JUAN RM 1.882 METERS 26355 | DX4280| CC3732 SAN JUAN AZ MK 2834401.9 | DX4280| DX4639 GILMAN LOOKOUT TOWER APPROX. 3.7 KM 2873559.5 | DX4280| CC3735 SAN JUAN RM 4 11.937 METERS 29616 | DX4280| EW7222 MT WILSON TV STA KRCA TOWER APPROX.45.9 KM 3185705.6 | DX4280| EW7223 MT WILSON CARNEGIE N OBS TWR APPROX.45.4 KM 3192650.7 | DX4280| CC3737 SAN JUAN RM 6 11.958 METERS 32726 | DX4280|---------------------------------------------------------------------| DX4280 DX4280 SUPERSEDED SURVEY CONTROL DX4280 DX4280 NAD 83(1992)- 33 54 49.52205(N) 117 44 17.20379(W) AD(1991.35) 1 DX4280 ELLIP H (09/20/94) 509.44 (m) GP(1991.35) 4 2 DX4280 NAD 83(1986)- 33 54 49.52138(N) 117 44 17.20438(W) AD(1984.00) 1 DX4280 NAD 27 - 33 54 49.46710(N) 117 44 14.00430(W) AD( ) 1 DX4280 NGVD 29 (07/19/86) 543.0 (m) 1781. (f) LEVELING 3 DX4280 DX4280.Superseded values are not recommended for survey control. DX4280.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. DX4280.See file dsdata.txt to determine how the superseded data were derived. DX4280 DX4280_U.S. NATIONAL GRID SPATIAL ADDRESS: 11SMT3176752839(NAD 83) DX4280_MARKER: B = BOLT DX4280_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT DX4280_STAMPING: SAN JUAN 1896 DX4280_MARK LOGO: CGS DX4280_MAGNETIC: N = NO MAGNETIC MATERIAL DX4280_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO DX4280+STABILITY: SURFACE MOTION DX4280_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR DX4280+SATELLITE: SATELLITE OBSERVATIONS - June 01, 1992 DX4280 DX4280 HISTORY - Date Condition Report By DX4280 HISTORY - 1886 MONUMENTED CGS DX4280 HISTORY - 1933 SEE DESCRIPTION CGS DX4280 HISTORY - 1939 SEE DESCRIPTION CGS DX4280 HISTORY - 1951 SEE DESCRIPTION CGS DX4280 HISTORY - 1953 SEE DESCRIPTION CGS DX4280 HISTORY - 1956 SEE DESCRIPTION CGS DX4280 HISTORY - 1958 SEE DESCRIPTION CGS DX4280 HISTORY - 1962 SEE DESCRIPTION CGS DX4280 HISTORY - 1963 SEE DESCRIPTION CGS DX4280 HISTORY - 1965 SEE DESCRIPTION CGS DX4280 HISTORY - 1970 SEE DESCRIPTION CA-059 DX4280 HISTORY - 1972 SEE DESCRIPTION NGS DX4280 HISTORY - 1973 SEE DESCRIPTION NGS DX4280 HISTORY - 1976 GOOD CADT DX4280 HISTORY - 1976 GOOD NGS DX4280 HISTORY - 19880315 GOOD PSOMAS DX4280 HISTORY - 19920601 GOOD CA-059 DX4280 DX4280 STATION DESCRIPTION DX4280 DX4280'DESCRIBED BY COAST AND GEODETIC SURVEY 1933 DX4280'ABOUT 5 MILES E OF OLINDA, 5 MILES NE OF YORBA LINDA, AND ON DX4280'SUMMIT OF HIGHEST AND SHARPEST PEAK OF SAN JUAN HILLS. TO REACH DX4280'FROM OLIVE, GO NE 3 MILES ON SANTA ANA CANYON ROAD TOWARD DX4280'CORONA. TURN LEFT ONTO FULLERTON ROAD AND GO 1.2 MILES. TURN DX4280'RIGHT AND GO 1.3 MILES. TURN RIGHT ONTO OHIO STREET AND GO 0.4 DX4280'MILE. TAKE RIGHT FORK WHERE MAIN ROAD BEARS LEFT AND TURN RIGHT DX4280'AGAIN AT INTERSECTION. CONTINUE STRAIGHT AHEAD AT END OF DX4280'PAVEMENT AND TAKE RIGHT FORK AT POINT 0.5 MILE BEYOND LAST DX4280'TURN. CONTINUE 0.4 MILE AND BEAR RIGHT JUST AFTER PASSING POWER DX4280'LINE. TURN LEFT INTO SMALL CANYON AND FOLLOW MAIN-TRAVELED DX4280'ROAD 1.0 MILE, PASSING SMALL FARMHOUSE AND CONTINUE 0.6 MILE DX4280'TO ANOTHER HOUSE. TAKE ROAD TO RIGHT WHICH RUNS E ALONG DX4280'FENCE LINE AND FOLLOW 2.4 MILES TO STATION SITE. STATION DX4280'PIER CAN BE SEEN ON HIGHEST HILL FOR SOME DISTANCE BEFORE DX4280'REACHING IT. IN 1886 UNDERGROUND MARK WAS CROSS IN COPPER DX4280'BOLT LEADED INTO DRILL HOLE 2-1/2 FEET BELOW SURFACE. SURFACE DX4280'MARK WAS PROBABLY LARGE STONE. IN 1896 HEXAGONAL CONCRETE PIER, DX4280'26 INCHES ACROSS AND PROJECTING 3.1 FEET ABOVE SURFACE, WAS DX4280'ERECTED, AND COPPER BOLT WITH CROSS WAS PLACED IN TOP. THREE DX4280'REFERENCE STONES, WITH DRILL HOLES FILLED WITH LEAD, WERE DX4280'PLACED TO N, S, AND E, EACH 6 FEET FROM STATION. CAIRN OF DX4280'STONES MARKING BOUNDARY BETWEEN ORANGE AND SAN BERNARDINO DX4280'COUNTIES WAS N. 33-1/2 DEG W. (MAGNETIC), DISTANT 16 FEET FROM DX4280'STATION. IN 1899 REFERENCE STONES WERE RESET, THE ONE TO E DX4280'BEING PLACED 6.12 FEET FROM STATION. IN 1929 REFERENCE STONES DX4280'WERE SEARCHED FOR BUT NOT RECOVERED, IN 1933 CENTER OF TOP DX4280'DIAGONALS OF TRANSMISSION TOWER WAS 0.5 MILE FROM STATION IN DX4280'AZIMUTH 206 DEG 04 MIN 18 SEC. AND METROPOLITAN WATER DISTRICT DX4280'SURVEY SIGNAL WAS 0.5 MILE FROM STATION IN AZIMUTH 309 DEG 15 DX4280'MIN 50 SEC. DX4280 DX4280 STATION RECOVERY (1939) DX4280 DX4280'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1939 (ANS) DX4280'STATION IS ON HIGHEST AND SHARPEST PEAK OF SAN JUAN HILLS, 5-1/2 DX4280'MILES E OF OLINDA, 10 MILES NW OF CORONA AND 5 MILES NE OF YORBA DX4280'LINDA. DX4280' DX4280'STATION MARK IS BRONZE RIVET WITH CROSS IN CENTER SET IN TOP OF DX4280'HEXAGON CONCRETE PIER 3 FEET HIGH. SAN JUAN 1886 IS WRITTEN DX4280'ON SIDE OF PIER IN CONCRETE. DX4280' DX4280'REFERENCE MARKS NOT RECOVERED. DX4280' DX4280'ELEVATION OF STATION 2300 FEET ABOVE SEA LEVEL. BAROMETER DX4280'NO.212. DX4280' DX4280'TO REACH FROM ATWOOD GO E ON HIGHWAY 14 FOR 1.6 MILES AND TURN DX4280'LEFT OFF HIGHWAY, (SIGN, YORBA LINDA 3 MILES), GO 0.7 MILE AND DX4280'KEEP STRAIGHT AHEAD ON RIGHT FORK, GO 0.7 MILE AND KEEP STRAIGHT DX4280'AHEAD, GO 0.1 MILE AND TURN RIGHT ON OHIO STREET, GO 0.5 DX4280'MILE AND TURN RIGHT, E, GO 0.2 MILE AND KEEP RIGHT FORK STRAIGHT DX4280'AHEAD, PAVEMENT ENDS, GO 0.25 MILES AND KEEP STRAIGHT AHEAD ON DX4280'RIGHT FORK ALONG TELEPHONE LINE, GO 0.4 MILE AND CROSS BENEATH DX4280'POWER LINE, GO 0.1 MILE AND KEEP STRAIGHT AHEAD ON MAIN DX4280'TRAVELED ROAD, GO 1.1 MILE AND PASS RANCH HOUSE, GO 0.6 MILE DX4280'AND TURN RIGHT ALONG FENCE LINE AT GATE ENTRANCE TO SECOND DX4280'RANCH HOUSE, TO 2.6 MILES AND KEEP RIGHT FORK, MAIN TRAVELED DX4280'ROAD, GO 0.2 MILE AND TURN RIGHT OFF GRADED ROAD, GO 0.2 DX4280'MILE UP HILL TO STATION ON HIGHEST POINT. DX4280 DX4280 STATION RECOVERY (1951) DX4280 DX4280'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1951 (RBF) DX4280'FOUND BRONZE RIVET WITH CENTER PUNCH MARK NOT CHISELED CROSS, DX4280'IN TOP OF HEXAGONAL CONCRETE PIER, 26 FEET ACROSS AND 3 FEET DX4280'HIGH. THIS STATION IS ON THE HIGHEST AND SHARPEST PEAK OF THE DX4280'SAN JUAN HILLS. CONCRETE PIER HAS U.S.C. AND G SURVEY (NOTE DX4280'THAT AND IS ILLEGIBLE AND SUR IS SMEARED OVER WITH FRESH CEMENT) DX4280'ON THE S SIDE, AND ON THE N SIDE IS INSCRIBED SAN JUAN 1896. DX4280'ALSO 3 CEMENT PIERS, INSIDE OF A 6-INCH STEEL PIPE FOR TRANSIT DX4280'TRIPOD LEGS WERE FOUND. ALSO FOUND WHAT APPEARS TO BE THE CHISELED DX4280'REMAINS OF A STANDARD BRONZE BM DISK ON TOP OF THE HEXAGONAL DX4280'CEMENT PIER. ALL THAT IS LEFT OF THE DISK IS A 1X1-INCH DX4280'TRIANGLE WITH THE CROSS MARK. DX4280' DX4280'WHAT APPEARS TO BE A REFERENCE STONE WAS FOUND ON THE SE SIDE DX4280'OF THE HEXAGONAL PIER. LEAD AND COPPER PIN WERE FOUND IN STONE. DX4280'MEASUREMENT TO CENTER OF PIER AND COPPER RIVET WAS 6.17 FEET DX4280'AND TO THE REMAINS OF THE BRONZE BM DISK 6.62 FEET. ALSO REMAINS DX4280'OF A CAIRN OF STONES MARKING BOUNDARY BETWEEN ORANGE AND SAN DX4280'BERNARDINO COUNTIES WERE FOUND AT N 33.5 DEG W (MAG) AND 16 FEET DX4280'DISTANT. DX4280' DX4280'TOP DIAGONALS OF TRANSMISSION TOWER IS 0.5 MILE AND AN AZIMUTH DX4280'OF 206 DEG 04 MIN 18 SEC FROM STATION APPEARS TO BE IN GOOD ORDER, DX4280'BUT NO CHECK ON AZIMUTH WAS FOUND AND THE DESCRIPTION OF THE DX4280'EXACT SPOT ON DIAGONALS APPEARS TO BE VAGUE. DX4280' DX4280'METROPOLITAN WATER DISTRICT SURVEY SIGNAL WAS SEARCHED FOR BUT DX4280'APPEARS TO BE MISSING. DX4280' DX4280'DESCRIPTION STATES THAT ELEVATION OF STATION IS 2300 FEET ABOVE DX4280'SEA LEVEL WHICH APPEARS TO BE IN ERROR. ALSO PAINTED ON THE N DX4280'SIDE OF THE CONCRETE HEXAGONAL PIER APPEARS TO BE FIGURES DX4280'1781.80 BUT THE NUMBER ARE HARDLY LEGIBLE. DX4280 DX4280 STATION RECOVERY (1953) DX4280 DX4280'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1953 (RAG) DX4280'THE STATION MARK AND ONE STONE REFERENCE POST WERE RECOVERED IN DX4280'GOOD CONDITION. THE OTHER TWO STONE REFERENCE POSTS AND THE CAIRN DX4280'OF STONES MARKING BOUNDARY BETWEEN COUNTIES WERE SEARCHED FOR BUT DX4280'NOT RECOVERED. TWO NEW REFERENCE MARKS WERE SET. NEW MARKS ARE DX4280'STANDARD BRONZE DISKS BRAZED IN TOP OF 2-INCH SOIL PIPES. DX4280' DX4280'THE 1939 DESCRIPTION AND ROUTE TO THE STATION IS ADEQUATE. A DX4280'BLADED ROAD RECENTLY BUILT BY THE SOUTHERN COUNTIES GAS COMPANY DX4280'OF CALIFORNIA WAS FOUND TO BE A BETTER ROUTE. THE ALTERNATE DX4280'ROUTE IS AS FOLLOWS--TO REACH FROM THE INTERSECTION OF YORBA DX4280'LINDA BLVD. AND LAKE VIEW DRIVE IN YORBA LINDA, GO NORTH ON DX4280'LAKE VIEW DRIVE 0.7 MILE TO ORIENTE DRIVE. TURN RIGHT ON DX4280'ORIENTE DRIVE, GO 0.6 MILE TO OHIO STREET. TURN LEFT ON OHIO DX4280'STREET, GO 0.35 MILE TO FORKS. KEEP RIGHT FORK, PASS DX4280'THROUGH GATE AND FOLLOW BLADED ROAD ALONG THE RIDGES, DX4280'EASTERLY, FOR 4.1 MILES TO FORKS. KEEP LEFT FORK, GO 0.9 MILE DX4280'THENCE BEAR RIGHT UP GRADE 0.1 MILE TO SUMMIT AND THE DX4280'STATION. DX4280' DX4280'REFERENCE MARK 3 IS 12.857 METERS (42.18 FEET) FROM STATION IN DX4280'AZIMUTH 11 DEG 49 MIN 06 SEC. THE MARK PROJECTS 6 INCHES DX4280'AND THE DISK IS STAMPED SAN JUAN NO 3 1886. DX4280' DX4280'THE STONE REFERENCE POST IS 1.885 METERS (6.18 FEET) FROM STATION DX4280'IN AZIMUTH 84 DEG 07 MIN 11 SEC. THE MARK PROJECTS 2 INCHES AND DX4280'THE MARK IS A SAND ROCK WITH A DRILL HOLE FILLED WITH LEAD. DX4280' DX4280'REFERENCE MARK 4 IS 11.898 METERS (39.02 FEET) FROM STATION IN DX4280'AZIMUTH 116 DEG 19 MIN 09 SEC. THE MARK PROJECTS 10 INCHES DX4280'AND THE DISK IS STAMPED SAN JUAN NO 4 1886. DX4280' DX4280'NOTE--A 6 FT. STAND WAS USED. DX4280 DX4280 STATION RECOVERY (1956) DX4280 DX4280'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1956 (RLE) DX4280'THE STATION MARK AND THE TWO PIPE REFERENCE MARKS WERE FOUND IN DX4280'GOOD CONDITION. THE REFERENCE POST MENTIONED IN THE 1953 DX4280'DESCRIPTION WAS SEARCHED FOR BUT NOT RECOVERED. A NEW AZIMUTH DX4280'MARK WAS SET BY THIS PARTY. FOLLOWING IS A NEW AND COMPLETE DX4280'DESCRIPTION. DX4280' DX4280'THE STATION IS LOCATED ABOUT 5 MILES EAST OF OLINDA, 5 MILES DX4280'NORTHEAST OF YORBA LINDA AND ON THE SUMMIT OF THE HIGHEST AND DX4280'SHARPEST PEAK OF THE SAN JUAN HILLS. THE STATION IS MARKED WITH DX4280'A 3/4-INCH COPPER BOLT, PUNCH MARK IN THE CENTER, FLUSH IN THE DX4280'TOP OF A HEXAGONAL CONCRETE PIER, 26 INCHES IN DIAMETER AND DX4280'PROJECTS 36 INCHES ABOVE THE GROUND. DX4280' DX4280'REFERENCE MARK NO. 3 IS A STANDARD DISK BRAZED TO THE TOP OF DX4280'A 2 INCH SOIL PIPE, IT IS STAMPED SAN JUAN NO 3 1886, AND PROJECTS DX4280'12 INCHES. DX4280' DX4280'REFERENCE MARK NO. 4 IS A STANDARD DISK BRAZED TO THE TOP OF A DX4280'2 INCH SOIL PIPE, IT IS STAMPED SAN JUAN NO 4 1886 AND PROJECTS DX4280'10 INCHES. DX4280' DX4280'AZIMUTH MARK IS A STANDARD DISK SET IN A DRILL HOLE IN AN DX4280'IRREGULAR SHAPED BOULDER, 14 FEET SOUTH OF A STEEL GATE AND 1 DX4280'FOOT WEST OF A FENCE, IT IS STAMPED SAN JUAN 1886 1956. DX4280' DX4280'REACHED FROM THE POST OFFICE IN YORBA LINDA BY GOING NORTH FOR DX4280'0.05 MILE TO A CROSS STREET, TURN RIGHT AND GO EAST FOR 0.15 DX4280'MILE TO A T JUNCTION, TURN LEFT AND GO 0.15 MILE TO ORIENTE DX4280'STREET, TURN RIGHT AND GO 0.45 MILE TO OHIO STREET, TURN LEFT AND DX4280'GO 0.25 MILE TO A GATE ON THE RIGHT, GO THROUGH GATE AND FOLLOW DX4280'BLADED ROAD FOR 1.05 MILE TO A T JUNCTION, TURN RIGHT AND GO 3.3 DX4280'MILES TO THE AZIMUTH ON THE RIGHT AS DESCRIBED, CONTINUE DX4280'THROUGH GATE FOLLOWING BLADED ROAD FOR 0.7 MILES TO A POINT DX4280'WHERE THE ROAD TURNS LEFT AROUND THE HIGHEST HILL, CONTINUE DX4280'STRAIGHT AHEAD, LEAVING ROAD AND GO 0.1 MILE TO THE HIGHEST DX4280'POINT AND STATION. DX4280 DX4280 STATION RECOVERY (1958) DX4280 DX4280'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1958 (WRH) DX4280'THE STATION WAS RECOVERED AS DESCRIBED AND ALL MARKS WERE FOUND DX4280'IN GOOD CONDITION. A NEW AZIMUTH MARK WAS ESTABLISHED. A DX4280'COMPLETE DESCRIPTION FOLLOWS. DX4280' DX4280'THE STATION IS LOCATED AIRLINE, ABOUT 10 MILES WEST-NORTHWEST OF DX4280'CORONA, ABOUT 5 MILES NORTHEAST OF YORBA LINDA, ABOUT 2-1/2 DX4280'MILES NORTH OF SANTA ANA CANYON AND ABOUT 2-1/3 MILES DX4280'EAST-SOUTHEAST OF GILMAN LOOKOUT TOWER, ON THE HIGHEST POINT OF SAN DX4280'JUAN HILLS. DX4280' DX4280'THE STATION IS A BRONZE RIVET WITH A HOLE IN THE CENTER, SET IN DX4280'TOP OF A HEXAGONAL MONUMENT WHICH IS ABOUT 24 INCHES IN DIAMETER DX4280'AND PROJECTS ABOUT 40 INCHES ABOVE THE GROUND. DX4280' DX4280'A REFERENCE MARK WHICH THE NUMBER IS UNKNOWN IS A COPPER PLUG SET DX4280'IN A DRILL HOLE IN A SMALL STONE WHICH PROJECTS ABOUT 2 INCHES DX4280'ABOVE THE GROUND AND IS ABOUT 3 FEET LOWER THAN THE STATION. DX4280' DX4280'REFERENCE MARK NUMBER THREE IS A STANDARD DISK STAMPED SAN JUAN DX4280'NO 3 1886 BRAZED TO THE TOP OF A 2-INCH IRON PIPE WHICH PROJECTS DX4280'ABOUT 14 INCHES ABOVE THE GROUND AND IS ABOUT 4 FEET LOWER THAN DX4280'THE STATION. DX4280' DX4280'REFERENCE MARK NUMBER FOUR IS A STANDARD DISK STAMPED SAN JUAN DX4280'NO 4 1886 BRAZED TO THE TOP OF A 2-INCH IRON PIPE WHICH PROJECTS DX4280'ABOUT 10 INCHES ABOVE THE GROUND AND IS ABOUT 3 FEET DX4280'LOWER THAN THE STATION. DX4280' DX4280'THE AZIMUTH MARK IS A STANDARD DISK STAMPED SAN JUAN 1886 SET DX4280'IN TOP OF A 10-INCH SQUARE CONCRETE MONUMENT WHICH PROJECTS ABOUT DX4280'4 INCHES ABOVE THE GROUND. IT IS ON TOP OF A RIDGE, 10 FEET DX4280'SOUTH OF THE CENTER LINE OF THE ROAD WHICH LEADS TO THE STATION. DX4280' DX4280'TO REACH THE STATION FROM THE JUNCTION OF U.S. HIGHWAY 91 AND DX4280'STATE HIGHWAY 71, WHICH IS ABOUT 3 MILES WEST OF CORONA, GO WEST DX4280'ON U.S. HIGHWAY 91 FOR 10.3 MILES TO A PAVED ROAD ON THE RIGHT AND DX4280'A SIGN ATWOOD. TURN RIGHT OFF THE HIGHWAY AND GO NORTH FOR 0.75 DX4280'MILE. CROSS THE RAILROAD TRACKS, TURN RIGHT AND GO EAST FOR 2.7 DX4280'MILES TO A GATE ON THE LEFT. TURN LEFT, PASS THROUGH THE GATE DX4280'AND GO NORTHERLY ON A GRADED ROAD FOR 0.9 MILE. TAKE THE RIGHT DX4280'FORK AND GO NORTHERLY FOR 0.4 MILE. TURN LEFT AT THE T-ROAD DX4280'AND GO WEST FOR 0.15 MILE. TURN SHARP RIGHT AT THE REVERSE DX4280'Y-FORK AND GO DOWNHILL, THEN LEFT NORTHWESTERLY UPHILL FOR 0.4 DX4280'MILE. TURN SHARP RIGHT AT AN OIL WELL, PASS TO THE LEFT OF DX4280'TWO STEEL TANKS AND GO UPHILL ON A TRACK ROAD, EASTERLY FOR DX4280'1.4 MILES TO THE SECOND ONE OF TWO GATES. PASS THROUGH AND DX4280'GO NORTH AND EAST FOR 0.2 MILE TO THE AZIMUTH MARK ON THE DX4280'RIGHT, SOUTH SIDE. CONTINUE EAST THEN GO NORTHERLY FOR 0.85 DX4280'MILE. TURN LEFT AT THE T-ROAD AND GO WEST FOR 0.2 MILE. TURN DX4280'SHARP LEFT AT THE REVERSE Y-FORK AND GO NORTHEAST UP THE STEEP DX4280'HILL FOR 0.05 MILE TO THE HIGHEST POINT AND THE STATION. DX4280 DX4280 STATION RECOVERY (1962) DX4280 DX4280'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1962 (CAA) DX4280'STATION WAS RECOVERED AND STATION MARK AND AZIMUTH MARK WERE FOUND DX4280'TO BE IN GOOD CONDITION. REFERENCE MARKS 3 AND 4 WERE FOUND DX4280'DESTROYED AND REFERENCE MARKS 5 AND 6 WERE ESTABLISHED. A SLIGHT DX4280'DIFFERENCE WAS FOUND IN THE DIRECTION TO THE AZIMUTH MARK. A DX4280'COMPLETE NEW DESCRIPTION FOLLOWS-- DX4280' DX4280'STATION IS ABOUT 5-1/2 MILES EAST OF OLINDA, ABOUT 5 MILES DX4280'NORTHEAST OF YORBA LINDA, ABOUT 2-1/2 MILES NORTH OF THE RIVERSIDE DX4280'FREEWAY AND ON THE HIGHEST AND SHARPEST PEAK OF SAN JUAN HILLS. DX4280' DX4280'TO REACH FROM INTERSECTION OF S. BREA BLVD. AND IMPERIAL DX4280'HIGHWAY IN BREA, GO EASTERLY ON IMPERIAL HIGHWAY FOR 2.9 MILES DX4280'TO CROSSROAD (VALENCIS AVENUE), TURN LEFT ON VALENCIA AVENUE DX4280'AND GO NORTHERLY FOR 0.7 MILE PASSING UNION OIL CO. RESEARCH DX4280'PLANT ON RIGHT TO CROSSROAD, CONTINUE STRAIGHT AHEAD ON VALENCIA DX4280'AVENUE FOR 0.2 MILES TO FORK, KEEP RIGHT ON CARBON CANYON ROAD DX4280'FOR 1.25 MILES TO (LA BREA POLICE POSSE HORSE CORRALS) ON LEFT, DX4280'CONTINUE 0.05 MILE TO A NARROW ROAD RIGHT OF HIGHWAY AT SIGN DX4280'(DANGEROUS FIRE AREA), KEEP RIGHT OFF HIGHWAY AND FOLLOW DX4280'NARROW ROAD FOR 0.3 MILE TO LOCKED GATE, PASS THROUGH GATE AND DX4280'KEEP RIGHT FORK AND GO 0.3 MILE TO CORRALS ON LEFT AT DX4280'CATTLE GUARD, CONTINUE ON MAIN ROAD UP DRAW FOR 0.6 MILE TO DX4280'FORK, KEEP RIGHT AND GO 0.5 MILE UP DRAW TO FORK, KEEP RIGHT DX4280'AND GO UP HILL ON SWITCH BACK ROAD AND FOLLOW MAIN ROAD ON DX4280'RIDGE FOR 0.9 MILE TO A SIDE ROAD RIGHT AND SIGN ON LEFT DX4280'(YORBA LINDA 2 MILES), CONTINUE STRAIGHT AHEAD EASTERLY DX4280'ON MAIN ROAD FOR 0.7 MILE TO LOCKED GATE, PASS THROUGH GATE DX4280'AND CONTINUE EASTERLY FOR 0.15 MILE TO SIDE ROAD RIGHT, DX4280'CONTINUE STRAIGHT AHEAD EASTERLY FOR 0.7 MILE TO GATE, PASS DX4280'THROUGH GATE AND CONTINUE EASTERLY 0.15 MILE TO SIDE ROAD DX4280'LEFT, CONTINUE EASTERLY 0.2 MILE TO GATE, PASS THROUGH DX4280'GATE AND GO EASTERLY AND THEN NORTHERLY 0.2 MILE TO GATE UNDER DX4280'POWER LINES, PASS THROUGH GATE AND GO EASTERLY 0.05 MILE TO SIDE DX4280'ROAD RIGHT, CONTINUE STRAIGHT AHEAD EASTERLY ON RIDGE FOR DX4280'0.35 MILE TO GATE, CONTINUE EASTERLY ON RIDGE FOR 0.35 MILE TO DX4280'FORK, KEEP LEFT AND GO 0.25 MILE TO SIDE ROAD LEFT AND GATE, PASS DX4280'THROUGH GATE AND CONTINUE EASTERLY 0.6 MILE TO SIDE ROAD LEFT, DX4280'CONTINUE STRAIGHT AHEAD FOR ABOUT 200 FEET TO FORK, KEEP RIGHT UP DX4280'HILL ON TRACK ROAD FOR 0.1 MILE TO TOP OF HILL AND STATION. DX4280' DX4280'STATION MARK IS A HEXAGON SHAPED CONCRETE POST WHICH MEASURE 2 DX4280'FEET ACROSS AND PROJECTS ABOUT 3 FEET. THE STAMPING ON THE DX4280'NORTH SIDE OF THE MARK IS SAN JUAN 1896. THE STATION IS ON THE DX4280'CENTER OF THE TOP OF PEAK, 38 FEET NORTHEAST OF THE WITNESS POST DX4280'AND 37.4 FEET SOUTHEAST OF A WITNESS POST. DX4280' DX4280'REFERENCE MARK 5, A STANDARD REFERENCE DISK STAMPED SAN JUAN DX4280'NO 5 1886, IS SET IN THE TOP OF A CONCRETE CYLINDER WHICH DX4280'PROJECTS ABOUT 2 INCHES ABOVE THE GROUND. THE MARK IS ABOUT 5 DX4280'FEET LOWER IN ELEVATION THAN THE STATION MARK AND 3.6 FEET DX4280'SOUTHEAST OF WITNESS POST. DX4280' DX4280'REFERENCE MARK 6, A STANDARD REFERENCE DISK STAMPED SAN JUAN NO 6 DX4280'1886, IS SET IN THE TOP OF A CONCRETE CYLINDER WHICH IS SET FLUSH DX4280'WITH THE SURFACE OF THE GROUND. THE MARK IS ABOUT 3 FEET LOWER DX4280'IN ELEVATION THAN THE STATION AND 2.9 FEET NORTH-NORTHEAST OF THE DX4280'WITNESS POST. DX4280' DX4280'AZIMUTH MARK, A STANDARD AZIMUTH DISK STAMPED SAN JUAN 1886, DX4280'IS SET IN THE TOP OF A 8 INCH SQUARE CONCRETE POST. THE MARK DX4280'IS 9 FEET SOUTH OF THE CENTER OF TRACK ROAD. DX4280' DX4280'HEIGHT OF LIGHT ABOVE STATION MARK 1 METERS. DX4280 DX4280 STATION RECOVERY (1963) DX4280 DX4280'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1963 (LGB) DX4280'THE STATION MARK, REFERENCE MARKS 5, 6 AND THE AZIMUTH MARK DX4280'WERE RECOVERED IN GOOD CONDITION WITH NO INDICATED DISPLACEMENT DX4280'OF THE MARKS NOTED AT THIS TIME. A NEW DESCRIPTION WITH DX4280'ADDITIONS AND CORRECTIONS IS AS FOLLOWS. DX4280' DX4280'THE STATION IS LOCATED AIRLINE, ABOUT 5 MILES EAST OF OLINDA, DX4280'5 MILES NORTHEAST OF YORBA LINDA AND ON THE HIGHEST POINT DX4280'OF THE SAN JUAN HILLS. THE PROPERTY IS OWNED BY THE RANCHO DX4280'SANTA ANA. DX4280' DX4280'TO REACH THE STATION FROM THE JUNCTION OF U.S. HIGHWAY 91 DX4280'AND STATE HIGHWAY 71 WHICH IS 3 MILES WEST OF CORONA, GO DX4280'WEST ON U.S. HIGHWAY 91 FOR 9.0 MILES TO THE CANYON CAFE ON DX4280'THE LEFT. CONTINUE WEST ON THE HIGHWAY FOR 1.3 MILES TO DX4280'A PAVED SIDE ROAD RIGHT AND SIGN ON THE RIGHT YORBA LINDA DX4280'4. TURN RIGHT AND GO NORTH ON THE PAVED ROAD FOR 0.7 MILE DX4280'TO A CROSSROAD JUST AFTER CROSSING RAILROAD TRACK. TURN DX4280'RIGHT AND GO EAST ON A PAVED ROAD FOR 2.8 MILES TO A PAVED DX4280'SIDE ROAD LEFT AND A SIGN ON THE LEFT METROPOLITAN WATER DX4280'DISTRICT OF SOUTHERN CALIFORNIA. TURN LEFT AND GO NORTH ON DX4280'A OILED ROAD FOR 1.35 MILES TO A T-ROAD JUNCTION AT THE TOP DX4280'OF A GRADE. TURN LEFT AND GO WEST ON A BLADED ROAD FOR DX4280'0.3 MILE TO A SIDE ROAD RIGHT. TURN SHARP RIGHT AND GO DX4280'DOWN HILL ON A BLADED ROAD, THENCE NORTH UPHILL FOR DX4280'0.45 MILE TO A BLADED AREA AND TWO OIL STORAGE TANKS ON DX4280'THE RIGHT. TURN RIGHT, PASSING TO THE LEFT OF THE DX4280'STORAGE TANKS AND GO EAST, UPHILL, ON A TRACK ROAD FOR 0.7 DX4280'MILE TO A LOCKED GATE. (KEY CAN BE OBTAINED FROM THE RANCHO DX4280'SANTA ANA HEADQUARTERS.) PASS THROUGH THE GATE AND CONTINUE DX4280'EAST AND NORTH ON THE TRACK ROAD FOR 0.8 MILE TO A DX4280'GATE. PASS THROUGH THE GATE AND CONTINUE NORTH ON THE DX4280'TRACK ROAD FOR 0.15 MILE TO THE AZIMUTH MARK ON THE DX4280'RIGHT. CONTINUE NORTH ON THE TRACK ROAD FOR 0.75 MILE DX4280'TO A FORK. TAKE RIGHT FORK AND CONTINUE NORTH ON A TRACK DX4280'ROAD FOR 0.15 MILE TO A DIM TRACK ROAD LEFT. TURN LEFT AND DX4280'GO WEST, UPHILL, FOR 0.15 MILE TO THE HIGHEST POINT AND DX4280'THE STATION. DX4280' DX4280'THE STATION MARK IS A 1/2 INCH COPPER BOLT WITH A HOLE PUNCHED DX4280'IN THE TOP. IT IS CEMENTED IN THE TOP OF A HEXAGON SHAPED DX4280'CONCRETE PIER WHICH IS 2.1 FEET IN DIAMETER AND 3.15 FEET DX4280'HIGH. IT IS ON THE HIGHEST POINT OF THE HILL. SAN JUAN DX4280'1896 AND A TRIANGLE ARE WRITTEN IN CEMENT ON THE NORTH SIDE DX4280'OF THE PIER. DX4280' DX4280'REFERENCE MARK 5 IS A STANDARD DISK, STAMPED SAN JUAN NO 5 DX4280'1886, SET IN THE TOP OF A ROUND CONCRETE MONUMENT 12 INCHES DX4280'IN DIAMETER AND PROJECTS ABOUT 2 INCHES ABOVE THE SURFACE DX4280'OF THE GROUND. IT IS 4.7 FEET SOUTHEAST OF A METAL WITNESS DX4280'POST AND ABOUT 4 FEET LOWER IN ELEVATION THAN THE STATION. DX4280' DX4280'REFERENCE MARK 6 IS A STANDARD DISK, STAMPED SAN JUAN NO 6 DX4280'1886, SET IN THE TOP OF A ROUND CONCRETE MONUMENT 12 INCHES DX4280'IN DIAMETER AND IS FLUSH WITH THE SURFACE OF THE GROUND. DX4280'IT IS 3 FEET NORTHEAST OF A METAL WITNESS POST AND IS ABOUT DX4280'5 FEET LOWER IN ELEVATION THAN THE STATION. DX4280' DX4280'THE AZIMUTH MARK IS A STANDARD DISK, STAMPED SAN JUAN 1886, DX4280'SET IN THE TOP OF A 10-INCH SQUARE CONCRETE MONUMENT WHICH DX4280'PROJECTS ABOUT 3 INCHES ABOVE THE SURFACE OF THE GROUND. DX4280'IT IS 9 FEET SOUTH OF THE CENTER OF A TRACK ROAD. DX4280 DX4280 STATION RECOVERY (1965) DX4280 DX4280'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1965 (MLG) DX4280'THE STATION, REFERENCE MARKS 5 AND 6 AND THE AZIMUTH MARK DX4280'WERE RECOVERED AS DESCRIBED BY IGB-63 IN GOOD CONDITION. DX4280 DX4280 STATION RECOVERY (1970) DX4280 DX4280'RECOVERY NOTE BY ORANGE COUNTY CALIFORNIA 1970 DX4280'THE STATION AND REFERENCE MARKS WERE RECOVERED AS DESCRIBED. DX4280'THE DESCRIPTION TO REACH THE STATION IS ADEQUATE. DX4280 DX4280 STATION RECOVERY (1972) DX4280 DX4280'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1972 (RH) DX4280'STATION, AZIMUTH MARKS AND REFERENCE MARKS WERE RECOVERED DX4280'IN GOOD CONDITION. A NEW TO REACH DESCRIPTION FOLLOWS. DX4280' DX4280'TO REACH THE STATION FROM THE INTERSECTION OF CALIFORNIA DX4280'HIGHWAY 71 AND CALIFORNIA HIGHWAY 142 (MERRILL AVENUE) GO DX4280'SOUTH ON CALIFORNIA HIGHWAY 71, 1.1 MILES, TURN RIGHT ON LOS DX4280'SERRANOS ROAD FOR ABOUT 200 FT, THEN LEFT ON POMONA RINKON DX4280'ROAD FOR 0.8 MILE TO DIRT ROAD ON RIGHT AT SOUTH EDGE OF DX4280'BRICK PLANT. TURN RIGHT AND FOLLOW DIRT ROAD 0.4 MILE TO DX4280'LOCKED GATE (YALE LOCK, EDISON KEY). CONTINUE ON PAVED DX4280'ROAD 2.3 MILES TO CATTLE GUARD, CONTINUE 2.4 MILES TO ANOTHER DX4280'CATTLE GUARD AND RANCH ENTRANCE. GO THROUGH GATE AHEAD DX4280'AND LEFT, GOING UPHILL ON DIRT ROAD 1.4 MILES TO FORKS. DX4280'TAKE LEFT FORK UPHILL 0.6 MILE TO LOCKED GATE (YALE LOCK, DX4280'EDISON KEY). CONTINUE ON DIRT ROAD 0.3 MILE TO 3 FORKS. DX4280'TAKE MIDDLE FORK 0.15 MILE UPHILL ALONG RIDGE TO TOP OF HILL DX4280'AND STATION. DX4280' DX4280'HEIGHT OF LIGHT ABOVE STATION MARK 4 FEET. DX4280' DX4280'AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--4-1/2 MILES DX4280'NE OF YORBA LINDA DX4280 DX4280 STATION RECOVERY (1973) DX4280 DX4280'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1973 (JLC) DX4280'THE STATION MARK, REFERENCE MARKS 5 AND 6, AND THE AZIMUTH DX4280'MARK WERE RECOVERED IN GOOD CONDITION. ALL DISTANCES AND DX4280'DIRECTIONS COMPARED FAVORABLY WITH PREVIOUS OBSERVATIONS DX4280'WITH THE EXCEPTION OF THE DISTANCE TO REFERENCE MARK 6 WHICH DX4280'WAS FOUND TO BE 0.08 FOOT AND 0.025 METER SHORTER. DUE TO DX4280'CHANGES IN THE AREA, A COMPLETE NEW DESCRIPTION FOLLOWS. DX4280' DX4280'THE STATION IS LOCATED IN NE 1/4 SEC 17, T 3 S, R 8 W, ABOUT DX4280'3 MILES NORTH OF STATE HIGHWAY 91 (RIVERSIDE FREEWAY), 5 MILES DX4280'EAST OF OLINDA, AND 6 MILES NORTHEAST OF YORBA LINDA. IT DX4280'IS ON THE HIGHEST POINT OF THE SAN JUAN HILLS. THERE IS DX4280'NO INFORMATION AS TO WHO OWNS THE PROPERTY AT THIS TIME, DX4280'BUT WAS REPORTED TO BE OWNED BY THE RANCHO SANTA ANA IN 1963. DX4280' DX4280'TO REACH THE STATION FROM THE INTERSECTION OF STATE HIGHWAY DX4280'91 (RIVERSIDE FREEWAY) AND STATE HIGHWAY 90 (IMPERIAL HIGHWAY), DX4280'GO NORTH ON STATE HIGHWAY 90 FOR 0.5 MILE TO A CROSSROAD. DX4280'TURN RIGHT AND GO EAST ON ORANGETHROPE AVENUE FOR 2.75 DX4280'MILES TO A SIDE ROAD ON THE LEFT AND A SMALL SIGN METROPOLITAN DX4280'WATER DISTRICT OF SOUTHERN CALIFORNIA. TURN LEFT AND GO DX4280'NORTH ON THE PAVED ROAD FOR 1.3 MILES TO A T-INTERSECTION DX4280'AT THE TOP OF THE HILL. TURN LEFT AND GO WEST ON THE DX4280'TRACK ROAD FOR 0.25 MILE TO A SIDE ROAD ON THE RIGHT. DX4280'TURN SHARP RIGHT AND GO DOWNHILL AND THEN NORTH UPHILL DX4280'FOR 0.55 MILE TO TWO STORAGE TANKS ON THE RIGHT. TURN DX4280'RIGHT PASSING TO THE LEFT OF THE STORAGE TANKS AND GO DX4280'EAST ON THE TRACK ROAD FOR 0.7 MILE TO A GATE. PASS DX4280'THROUGH THE GATE AND CONTINUE EAST AND NORTH ON THE TRACK DX4280'ROAD FOR 0.8 MILE TO A GATE. PASS THROUGH THE GATE AND DX4280'CONTINUE NORTH ON THE TRACK ROAD FOR 0.15 MILE TO THE DX4280'AZIMUTH MARK ON THE RIGHT. CONTINUE NORTH ON THE TRACK DX4280'ROAD FOR 0.75 MILE TO A FORK. TAKE THE RIGHT FORK AND DX4280'GO NORTH 0.15 MILE TO A DIM TRACK ROAD ON THE LEFT. DX4280'TURN LEFT AND GO WEST UPHILL FOR 0.15 MILE TO THE DX4280'HIGHEST POINT OF THE HILL AND THE STATION. DX4280' DX4280'THE STATION MARK IS A 1/2 INCH COPPER BOLT WITH A HOLE PUNCHED DX4280'IN THE TOP. THE BOLT IS CEMENTED IN THE TOP OF A HEXAGON DX4280'SHAPED PIER WHICH IS 2 FEET IN DIAMETER AND PROJECTS 3 DX4280'FEET ABOVE THE SURFACE OF THE GROUND. IT HAS SAN JUAN DX4280'1896 CHISLED IN THE NORTH FACE OF THE PIER. DX4280' DX4280'REFERENCE MARK 5 IS A STANDARD DISK STAMPED SAN JUAN NO DX4280'5 1886, CEMENTED IN THE TOP OF A 12-INCH ROUND CONCRETE MONUMENT DX4280'WHICH IS FLUSH WITH THE SURFACE OF THE GROUND. NOTE 11B DX4280' DX4280'REFERENCE MARK 6 IS A STANDARD DISK STAMPED SAN JUAN NO 6 DX4280'1886, CEMENTED IN THE TOP OF A 12-INCH ROUND CONCRETE MONUMENT DX4280'WHICH IS FLUSH WITH THE SURFACE OF THE GROUND. NOTE 11B DX4280' DX4280'THE AZIMUTH MARK IS A STANDARD DISK STAMPED SAN JUAN 1886, DX4280'CEMENTED IN THE TOP OF A 10-INCH SQUARE CONCRETE MONUMENT DX4280'WHICH PROJECTS 3 INCHES ABOVE THE SURFACE OF THE GROUND. DX4280'IT IS 9 FEET SOUTH OF THE CENTER OF THE TRACK ROAD AND 2.2 DX4280'FEET NORTH OF A METAL WITNESS POST WITH A SIGN ATTACHED. DX4280'NOTE 16A DX4280' DX4280'HEIGHT OF LIGHT ABOVE STATION MARK 4.5 FEET. DX4280' DX4280'AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--5 MILES DX4280'EAST OF OLINDA DX4280 DX4280 STATION RECOVERY (1976) DX4280 DX4280'RECOVERY NOTE BY CALTRANS 1976 (ARA) DX4280'THE STATION MARK, AZIMUTH MARK AND REFERENCE MARKS NO 5 AND NO 6 WERE DX4280'RECOVERED IN GOOD CONDITION AS DESCRIBED BY J.L. COOK IN 1973. DX4280 DX4280 STATION RECOVERY (1976) DX4280 DX4280'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1976 (PDC) DX4280'STATION AND RMS 5 AND 6 WERE RECOVERED IN GOOD CONDITION AS DX4280'DESCRIBED. AZIMUTH MARK NOT SEARCHED FOR. DX4280' DX4280'AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN DX4280'4-1/2 MILES NE OF YORBA LINDA. DX4280 DX4280 STATION RECOVERY (1988) DX4280 DX4280'RECOVERY NOTE BY PSOMAS AND ASSOCIATES 1988 DX4280'THE STATION IS LOCATED IN THE EASTERN PORTION OF ORANGE COUNTY. DX4280'TO REACH THE STATION FROM THE INTERSECTION OF STATE HIGHWAY 91 AND DX4280'WIER CANYON ROAD IN THE CITY OF YORBA LINDA, GO NORTHERLY 1.3 MILES DX4280'ALONG WIER CANYON ROAD AND YORBA LINDA BOULEVARD TO STONEHAVEN ROAD DX4280'ON RIGHT, TURN RIGHT ONTO STONEHAVEN ROAD AND GO 0.6 MILE TO A DIRT DX4280'ROAD ON RIGHT, TURN RIGHT ONTO ROAD AND GO 200 FEET UP HILL ON ROAD DX4280'TO A GATE WITH A COUNTY, DAI, LOCK AND AN S.C. EDISON LOCK, CONTINUE DX4280'THROUGH GATE AND ALONG DIRT ROAD FOR 0.5 MILE EASTERLY AND NORTHERLY DX4280'TO A FORK IN THE ROAD AT AN OIL PUMP AND TWO STORAGE TANKS. TURN DX4280'RIGHT AND GO EAST 0.5 MILE TO A GATE WITH AN S.C. EDISON AND COUNTY, DX4280'DAI, LOCK. PASS THOUGH THE GATE AND CONTINUE ALONG ROAD FOR 0.7 MILE DX4280'TO A GATE WITH S.C. EDISON AND COUNTY, DAI, LOCKS, PASS THROUGH GATE DX4280'AND CONTINUE ALONG ROAD EASTERLY AND NORTHEASTERLY 1.1 MILES TO A DX4280'DIRT ROAD ON THE LEFT, TURN LEFT AND GO WEST UPHILL FOR 0.15 MILE TO DX4280'THE HIGHEST POINT AND STATION. DX4280'THE STATION MARK IS A 1/2 INCH COPPER BOLT WITH A PUNCH HOLE SET IN A DX4280'HEXAGONAL PIER 2 FEET IN DIAMETER AND PROJECTING 3 FEET ABOVE GROUND. DX4280'SAN JUAN 1896 IS CHISELED INTO THE NORTH FACE OF THE PIER. DX4280'REFERENCE MARK 5 IS A STANDARD DISK STAMPED --- SAN JUAN NO. 5 DX4280'1896---, SET IN A 12 INCH CYLINRDICAL CONCRETE MONUMENT FLUSH WITH DX4280'THE GROUND. RM 5 IS 38.98 FEET DISTANT FROM THE STATION. DX4280'REFERENCE MARK 6 IS A STANDARD DISK STAMPED ---SAN JUAN NO. 6 1886---, DX4280'SET IN A 12 INCH CYLINDRICAL CONCRETE MONUMENT FLUSH WITH THE GROUND DX4280'. THE STATION IS 39.27 FEET FROM RM 6. DX4280 DX4280 STATION RECOVERY (1992) DX4280 DX4280'RECOVERY NOTE BY ORANGE COUNTY CALIFORNIA 1992 DX4280'RECOVEREY NOTE AS DESCRIBED BY PSOMAS AND ASSOCIATES 1988 IS ADEQUATE. DX4280'SOME OF THE LOCKS HAVE BEEN CHANGED OR REMOVED. TO OBTAIN ACCESS DX4280'THROUGH GATES IN CHINO HILLS STATE PARK, CONTACT STATE OF CALIFORNIA, DX4280'DEPARTMENT OF PARK AND RECREATION, CHINO HILLS DISTRICT, CHIEF RANGER DX4280'BOB BIRKLAND AT (714) 349-1365 OR (714) 269-5204. DX4280'$ DX4280'TO OBTAIN INFORMATION REGARDING ACCESS TO A KEY FOR A DA1 LOCK, DX4280'CONTACT COUNTY OF ORANGE SURVEY DIVISION AT (714) 567-6324 OR (714) DX4280'567-7856. DX4280'$ DX4280'THIS STATION WAS OCCUPIED AS PART OF A CALIFORNIA HPGN DENSIFICATION DX4280'SURVEY.