National Geodetic Survey, Retrieval Date = JANUARY 20, 2002 DC1901 *********************************************************************** DC1901 DESIGNATION - JACUMBA DC1901 PID - DC1901 DC1901 STATE/COUNTY- CA/SAN DIEGO DC1901 USGS QUAD - JACUMBA (1975) DC1901 DC1901 *CURRENT SURVEY CONTROL DC1901 ___________________________________________________________________ DC1901* NAD 83(1992)- 32 41 52.06069(N) 116 09 52.02882(W) ADJUSTED DC1901* NAVD 88 - 1376.4 (meters) 4516. (feet) VERTCON DC1901 ___________________________________________________________________ DC1901 EPOCH DATE - 1991.35 DC1901 LAPLACE CORR- -4.61 (seconds) DEFLEC99 DC1901 GEOID HEIGHT- -32.75 (meters) GEOID99 DC1901 DC1901 HORZ ORDER - FIRST DC1901 DC1901.The horizontal coordinates were established by classical geodetic methods DC1901.and adjusted by the National Geodetic Survey in June 1996. DC1901.The horizontal coordinates are valid at the epoch date displayed above. DC1901.The epoch date for horizontal control is a decimal equivalence DC1901.of Year/Month/Day. DC1901 DC1901.The NAVD 88 height was computed by applying the VERTCON shift value to DC1901.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) DC1901 DC1901.The Laplace correction was computed from DEFLEC99 derived deflections. DC1901 DC1901.The geoid height was determined by GEOID99. DC1901 DC1901; North East Units Scale Converg. DC1901;SPC CA 6 - 558,907.152 2,008,021.959 MT 1.00001534 +0 02 49.2 DC1901;SPC CA 6 - 1,833,681.21 6,587,985.38 sFT 1.00001534 +0 02 49.2 DC1901;UTM 11 - 3,618,093.749 578,319.541 MT 0.99967563 +0 27 05.0 DC1901 DC1901: Primary Azimuth Mark Grid Az DC1901:SPC CA 6 - JACUMBA RM 3 029 44 41.0 DC1901:UTM 11 - JACUMBA RM 3 029 20 25.2 DC1901 DC1901|---------------------------------------------------------------------| DC1901| PID Reference Object Distance Geod. Az | DC1901| dddmmss.s | DC1901| JACUMBA RM 4 9.953 METERS 00419 | DC1901| JACUMBA RM 3 0294730.2 | DC1901| DC1902 JACUMBA USGS 1935 3.460 METERS 15540 | DC1901| JACUMBA RM 1 8.468 METERS 28153 | DC1901|---------------------------------------------------------------------| DC1901 DC1901 SUPERSEDED SURVEY CONTROL DC1901 DC1901 NAD 83(1986)- 32 41 52.06331(N) 116 09 52.02892(W) AD(1984.00) 1 DC1901 NAD 27 - 32 41 51.84800(N) 116 09 48.95700(W) AD( ) 1 DC1901 NGVD 29 - 1375.6 (m) 4513. (f) VERT ANG DC1901 DC1901.Superseded values are not recommended for survey control. DC1901.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. DC1901.See file dsdata.txt to determine how the superseded data were derived. DC1901 DC1901_MARKER: DS = TRIANGULATION STATION DISK DC1901_SETTING: 66 = SET IN ROCK OUTCROP DC1901 DC1901 HISTORY - Date Condition Report By DC1901 HISTORY - 1935 MONUMENTED CGS DC1901 HISTORY - 1941 GOOD CGS DC1901 HISTORY - 1954 GOOD CGS DC1901 DC1901 STATION DESCRIPTION DC1901 DC1901'DESCRIBED BY COAST AND GEODETIC SURVEY 1935 (CP) DC1901'STATION IS ON A HIGH ROCKY PEAK, THE HIGHEST POINT OF THE JACUMBA DC1901'MOUNTAINS AND IS 7 MILES (AIR LINE) A LITTLE E OF N FROM DC1901'JACUMBA. DC1901' DC1901'STATION AND REFERENCE MARKS NOS. 1 AND 3, ARE STANDARD DC1901'BRONZE DISKS WEDGED IN DRILL HOLES IN OUTCROPPING BEDROCK. DC1901' DC1901'THE U.S.G.S. MARK IS A BRONZE DISK SET IN ROCK OUTCROP. DC1901' DC1901'REFERENCE MARK NO. 3 (AZIMUTH MARK) WAS ESTABLISHED BUT DC1901'WAS NOT FOUND BY OBSERVING PARTY. IT IS 1/4 MILE N. DC1901' DC1901'REACHED FROM JACUMBA AS FOLLOWS--GO E ON U.S. HIGHWAY 80 DC1901'TO MILLERS SERVICE STATION (AT THE BOTTOM OF THE MOUNTAIN DC1901'GRADE) TURN LEFT AND GO 200 YARDS TO OLD OILED ROAD, TURN DC1901'RIGHT AND GO 50 YARDS PAST RAILROAD UNDERPASS, TURN SHARP DC1901'LEFT ON DESERT ROAD, GO 1.8 MILES TAKE RIGHT FORK (MAIN-TRAVELED DC1901'ROAD) GO 2.6 MILES AND CROSS RAILROAD TRACKS, GO 1.6 MILES DC1901'AND TURN LEFT ACROSS RAILROAD TRACKS, GO 1.3 MILES AND BEAR DC1901'LEFT, GO 0.5 MILE AND TAKE RIGHT FORK, CONTINUE 0.3 MILE TO DC1901'SHACK, PASS SHACK AND CONTINUE 0.1 MILE TO END OF TRUCK TRAVEL. DC1901'FROM THIS POINT THE STATION LIES SW ABOUT 3 MILES. THE DC1901'BEST ROUTE IS UP THE LEFT HAND WASH WHICH CIRCLES AROUND AND DC1901'HEADS DIRECTLY BELOW THE PEAK. KEEP TO THE MAIN WASH DC1901'AT ALL FORKS. A 3-HOUR PACK AND VERY DIFFICULT TO DESCEND AT DC1901'NIGHT. DC1901 DC1901 STATION RECOVERY (1941) DC1901 DC1901'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1941 (JCS) DC1901'STATION IS ON A HIGH, ROCKY PEAK, THE HIGHEST POINT OF THE DC1901'JACUMBA MOUNTAINS AND IS 7 MILES, AIR LINE, A LITTLE E OF DC1901'N FROM JACUMBA. DC1901' DC1901'STATION MARK IS A STANDARD DISK SET IN BEDROCK 3 FEET BELOW DC1901'THE HIGHEST POINT AND IS STAMPED JACUMBA 1935. DC1901' DC1901'REFERENCE MARK NO. 1 IS A STANDARD DISK IN BEDROCK, ABOUT DC1901'8 FEET LOWER THAN THE STATION 8.459 METERS (27.754 FEET) DC1901'WNW OF THE STATION. IT IS STAMPED JACUMBA NO. 1 1935. DC1901' DC1901'THE AZIMUTH MARK IS SET IN THE LARGEST OF A ROW OF GRANITE DC1901'BOULDERS ABOUT 1/4 MILE NNE OF THE STATION. IT IS A STANDARD DC1901'DISK STAMPED JACUMBA NO. 3 1935. DC1901' DC1901'THE U.S.G.S. MARK PREVIOUSLY GIVEN AS 3.460 METERS S COULD DC1901'NOT BE FOUND, ALTHOUGH A THOROUGH SEARCH WAS MADE FOR IT. DC1901' DC1901'TO REACH FROM JACUMBA GO E ON U.S. HIGHWAY 80 TO A POINT DC1901'NEAR BOTTOM OF MOUNTAIN GRADE 0.6 MILE W OF MILLERS SERVICE DC1901'STATION. TURN LEFT AT GUARD RAIL ONTO AN OLD OIL ROAD AND DC1901'FOLLOW THIS ONTO A TRACK ROAD 0.7 MILE. CROSS RAILROAD, DC1901'THENCE LEFT ALONG IT 0.7 MILE TO FORK. TAKE LEFT FORK, DC1901'MAIN-TRAVELED ROAD, AND GO 1.3 MILES. TAKE LEFT FORK 0.5 MILE DC1901'TO RAILROAD CROSSING. CONTINUE 0.2 MILE. TAKE LEFT FOR 0.4 DC1901'MILE, CROSS RAILROAD AND CONTINUE ON MAIN-TRAVELED ROAD DC1901'1.6 MILES. CROSS RAILROAD AND GO 0.2 MILE. TAKE LEFT FORK, DC1901'GO 1.6 MILES. THENCE RIGHT FORK 0.3 MILE TO A SHACK AND SOME DC1901'BEEHIVES. CONTINUE ON ROAD 0.1 MILE TO END OF TRUCK DC1901'TRAVEL IN CANYON. DC1901' DC1901'FROM END OF TRUCK TRAVEL PICK UP TRAIL LEADING SOUTHWESTERLY UP DC1901'MAIN DRAW AND FOLLOW IT TO TOP OF THE DRAW, (STATION IS VISIBLE DC1901'TO S). CONTINUE ON TRAIL (MARKED BY SMALL CAIRNS) WESTERLY TO DC1901'WHERE IT CROSSES GORGE AND LEADS SOUTHERLY ALONG SIDE OF MAIN DC1901'RIDGE TO ITS END AND AT AN OLD MINE. ASCEND RIDGE ABOVE DC1901'MINE AND CONTINUE SOUTERLY ALONG TOP OF RIDGE TO HIGHEST POINT DC1901'AND STATION, APPROXIMATELY A 2 1/2-HOUR BACK PACK AND A DC1901'DISTANCE OF 5 MILES. SHORTER ROUTES TO THE STATION CAN BE DC1901'FOUND, BUT THE ABOVE ROUTE IS BELIEVED TO BE THE LEAST DC1901'DIFFICULT. DC1901 DC1901 STATION RECOVERY (1954) DC1901 DC1901'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1954 (LSB) DC1901'THE STATION MARK AND REFERENCE MARKS 1 AND 3 WERE RECOVERED DC1901'AND WERE FOUND TO BE IN GOOD CONDITION. THE U.S. GEOLOGICAL SURVEY DC1901'MARK LISTED AS MISSING IN 1941 WAS AGAIN SEARCHED FOR BUT DC1901'NOT FOUND. REFERENCE MARK 4 WAS ESTABLISHED THIS DATE. DC1901' DC1901'THE DISTANCE AND DIRECTION TO REFERENCE MARKS 1 AND 3 CHECKED DC1901'THE 1941 DATA WITHIN PROVISIONAL LIMITS. THE ORIGINAL DC1901'DESCRIPTION IS ADEQUATE FOR RECOVERY BUT A NEW AND SHORTER DC1901'ROUTE TO THE STATION IS LISTED BELOW. DC1901' DC1901'THE STATION IS LOCATED ABOUT 11 MILES WEST-SOUTHWEST OF DC1901'COYOTE WELLS, AND ABOUT 7 MILES NORTH-NORTHEAST OF JACUMBA, DC1901'ON A HIGH ROCKY PEAK, THE HIGHEST POINT OF THE JACUMBA DC1901'MOUNTAINS. DC1901' DC1901'TO REACH THE STATION FROM THE POST OFFICE IN JACUMBA, GO DC1901'EAST ON U.S. HIGHWAY 80 FOR 3.8 MILES TO A DIRT ROAD LEFT. DC1901'(THIS POINT IS 2.0 MILES WEST OF THE OASIS CAFE AND A CHEVRON DC1901'SERVICE STATION). TURN LEFT AND GO NORTH AND NORTHWEST ON DC1901'THE MICA GEM MINING AND MILLING CORPORATION ROAD FOR 1.05 DC1901'MILES TO A FORK. TAKE THE LEFT FORK AND GO 0.1 MILE TO A DC1901'FORK NEAR A LARGE TIN BUILDING. TAKE THE RIGHT FORK, KEEPING DC1901'TO THE LEFT OF THE TIN BUILDING, AND GO UP HILL (NORTHEAST) DC1901'FOR 1.3 MILES TO A FORK. TAKE THE LEFT FORK (NORTHERLY) AND DC1901'GO 2.25 MILES TO A ROAD LEFT. CONTINUE STRAIGHT AHEAD DC1901'(NORTHERLY) FOR 1.2 MILES TO A ROAD LEFT. TURN LEFT (WEST) AND DC1901'GO 0.05 MILE TO A FORK. TAKE THE RIGHT FORK AND GO 0.15 DC1901'MILE TO THE END OF THE ROAD AT A CONCRETE SLAB ON THE LEFT. DC1901'CONTINUE NORTHWESTERLY AROUND THE BASE OF THE HILL, DC1901'THENCE NORTHERLY TOWARD THE STATION HILL FOR 0.7 MILE TO DC1901'THE END OF TRUCK TRAVEL. THIS LAST MILEAGE IS CROSS DC1901'COUNTRY AND A 4-WHEEL DRIVE VEHICLE IS REQUIRED. PACK DC1901'NORTH-NORTHEAST FOR APPROXIMATELY 1-1/2 HOURS TO THE HIGHEST DC1901'POINT AND THE STATION. DC1901' DC1901'THE STATION MARK, A STANDARD DISK STAMPED JACUMBA 1935, IS DC1901'CEMENTED IN A DRILL HOLE IN BEDROCK THAT IS FLUSH WITH THE DC1901'GROUND AND IS ABOUT 3 FEET LOWER THAN THE HIGHEST POINT OF DC1901'THE PEAK. DC1901' DC1901'REFERENCE MARK 1, A STANDARD DISK STAMPED JACUMBA NO 1 1935, DC1901'IS SET IN A DRILL HOLE IN AN OUTCROP THAT IS OFFSET FROM THE DC1901'MAIN PEAK AND IS ABOUT 10 FEET LOWER THAN THE STATION MARK. DC1901' DC1901'REFERENCE MARK 4, A STANDARD DISK STAMPED JACUMBA NO 4 1935, DC1901'IS SET IN A DRILL HOLE IN BEDROCK THAT IS ABOUT 8 FEET LOWER DC1901'THAN THE STATION MARK. THE MARK IS ABOUT 7 FEET WEST OF THE DC1901'EAST EDGE OF A VERTICAL DROP. DC1901' DC1901'REFERENCE MARK 3, A STANDARD DISK STAMPED JACUMBA NO 3 1935, DC1901'IS SET IN THE TOP OF THE LARGEST ONE OF SEVERAL MONSTROUS DC1901'GRANITE BOULDERS THAT PROJECT ABOUT 20 FEET ABOVE THE GROUND. DC1901'THE MARK IS LOCATED ON THE FIRST PROMINENT POINT NORTHEAST OF DC1901'THE STATION. DC1901' DC1901'OBSERVATIONS WERE MADE FROM A 1.5 METER TRIPOD.