National Geodetic Survey, Retrieval Date = JANUARY 9, 2003 JT2703 *********************************************************************** JT2703 DESIGNATION - MOUNT HELENA JT2703 PID - JT2703 JT2703 STATE/COUNTY- CA/SONOMA JT2703 USGS QUAD - MOUNT ST HELENA (1997) JT2703 JT2703 *CURRENT SURVEY CONTROL JT2703 ___________________________________________________________________ JT2703* NAD 83(1992)- 38 40 09.62709(N) 122 38 00.55510(W) ADJUSTED JT2703* NAVD 88 - 1323.3 (meters) 4342. (feet) VERTCON JT2703 ___________________________________________________________________ JT2703 EPOCH DATE - 1991.35 JT2703 LAPLACE CORR- 6.07 (seconds) DEFLEC99 JT2703 GEOID HEIGHT- -30.22 (meters) GEOID99 JT2703 JT2703 HORZ ORDER - FIRST JT2703 JT2703.The horizontal coordinates were established by classical geodetic methods JT2703.and adjusted by the National Geodetic Survey in March 1994. JT2703.The horizontal coordinates are valid at the epoch date displayed above. JT2703.The epoch date for horizontal control is a decimal equivalence JT2703.of Year/Month/Day. JT2703 JT2703.The NAVD 88 height was computed by applying the VERTCON shift value to JT2703.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) JT2703 JT2703.The Laplace correction was computed from DEFLEC99 derived deflections. JT2703 JT2703.The geoid height was determined by GEOID99. JT2703 JT2703; North East Units Scale Converg. JT2703;SPC CA 2 - 611,494.665 1,944,872.465 MT 0.99994079 -0 23 57.8 JT2703;SPC CA 2 - 2,006,212.08 6,380,802.41 sFT 0.99994079 -0 23 57.8 JT2703;UTM 10 - 4,280,147.744 531,884.191 MT 0.99961252 +0 13 44.4 JT2703 JT2703: Primary Azimuth Mark Grid Az JT2703:SPC CA 2 - MOUNT HELENA AZ MK 065 32 47.4 JT2703:UTM 10 - MOUNT HELENA AZ MK 064 55 05.2 JT2703 JT2703|---------------------------------------------------------------------| JT2703| PID Reference Object Distance Geod. Az | JT2703| dddmmss.s | JT2703| DB4588 WOODS 0091820.9 | JT2703| DB4844 MOUNT HELENA AZ MK 0650849.6 | JT2703| JT2701 MOUNT HELENA LOOKOUT TWR 1949 14.680 METERS 15105 | JT2703| JT2702 MOUNT HELENA ECC 4.219 METERS 23251 | JT2703| DB4846 MOUNT HELENA RM 2 10.311 METERS 24536 | JT2703| DB4845 MOUNT HELENA RM 1 2.498 METERS 34420 | JT2703|---------------------------------------------------------------------| JT2703 JT2703 SUPERSEDED SURVEY CONTROL JT2703 JT2703 NAD 83(1986)- 38 40 09.62422(N) 122 38 00.54648(W) AD(1984.00) 1 JT2703 NAD 27 - 38 40 09.97100(N) 122 37 56.60400(W) AD( ) 1 JT2703 NGVD 29 - 1322.4 (m) 4339. (f) VERT ANG JT2703 JT2703.Superseded values are not recommended for survey control. JT2703.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. JT2703.See file dsdata.txt to determine how the superseded data were derived. JT2703 JT2703_U.S. NATIONAL GRID SPATIAL ADDRESS: 10SEH3188480148(NAD 83) JT2703 JT2703 HISTORY - Date Condition Report By JT2703 HISTORY - 1876 MONUMENTED CGS JT2703 HISTORY - 1930 SEE DESCRIPTION CGS JT2703 HISTORY - 1937 SEE DESCRIPTION CGS JT2703 HISTORY - 1938 SEE DESCRIPTION CGS JT2703 HISTORY - 1948 SEE DESCRIPTION CGS JT2703 HISTORY - 1949 SEE DESCRIPTION CGS JT2703 HISTORY - 1960 SEE DESCRIPTION CGS JT2703 HISTORY - 1974 SEE DESCRIPTION NGS JT2703 JT2703 STATION DESCRIPTION JT2703 JT2703'DESCRIBED BY COAST AND GEODETIC SURVEY 1930 JT2703'ABOUT 7 MILES NORTH OF CALISTOGA, 4 MILES NORTHWEST OF SUMMIT JT2703'OF GRADE WHERE STATE HIGHWAY CROSSES DIVIDE, AND ON HIGHEST JT2703'POINT OF MOUNT HELENA. IN 1876 STATION WAS MARKED BY FINE JT2703'DRILL HOLE AND CROSS CUT IN TOP OF 1/2-INCH COPPER BOLT CEMENTED JT2703'IN BEDROCK AND PROJECTING 1/4 INCH. DRILL HOLE IN BASALT ROCK, JT2703'SAID TO MARK BOUNDARY BETWEEN LAKE AND NAPA COUNTIES, WAS 7 JT2703'FEET 1-3/4 INCHES NORTHWEST OF STATION. PIER, 3 BRICKS SQUARE JT2703'BY 43 INCHES ABOVE GROUND, WITH DRILL HOLE IN CENTER BRICK JT2703'MARKING STATION WAS BUILT OVER BOLT. COLLIMATOR PIER, 61 JT2703'INCHES HIGH AND 2 BRICKS SQUARE, WAS 7 FEET 7-1/2 INCHES JT2703'NORTHWEST OF STATION. TRANSIT PIER, 3.25 FEET HIGH AND 2 JT2703'BRICKS BY 3 BRICKS, WAS 55 FEET 11 INCHES SOUTHEAST OF STATION. JT2703'LATITUDE PIER, 3.05 FEET HIGH AND 2 BY 2-1/2 BRICKS, WITH JT2703'3.5-FOOT SPACE BETWEEN SIDE OF PIER AND SIDE OF TRANSIT JT2703'PIER, WAS 58 FEET 2-1/2 INCHES FROM STATION IN AZIMUTH JT2703'330 DEG 09 MIN. VERTICAL-CIRCLE PIER, 3.65 FEET HIGH AND 2 BRICKS JT2703'SQUARE, WAS 55-1/2 FEET SOUTHEAST OF LATITUDE PIER AND JT2703'109 FEET 3-1/2 INCHES FROM STATION IN AZIMUTH 314 DEG 02 MIN. JT2703'IN 1891 BRICK PIERS WERE REBUILT. IN 1922 TWO STANDARD JT2703'REFERENCE DISKS WERE ESTABLISHED IN BEDROCK. NO. 1 IS 2.502 JT2703'METERS (8.21 FEET) (SLOPE) FROM STATION IN AZIMUTH 164 JT2703'DEG 15 MIN. NO. 2 IS 10.48 METERS (34.4 FEET) (SLOPE) JT2703'FROM STATION IN AZIMUTH 65 DEG 35 MIN. JT2703 JT2703 STATION RECOVERY (1937) JT2703 JT2703'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1937 (RRL) JT2703'PUBLICATIONS OF THE U.S. GEOLOGICAL SURVEY AND OTHER MAPS JT2703'IN CIRCULATION IN CALIFORNIA SHOW THE MOUNTAIN AS ST. HELENA. JT2703'THE SMALL CITY AT THE BASE OF THE MOUNTAIN IS ALSO ST. HELENA. JT2703' JT2703'IT IS RECOMMENDED THAT THE PUBLICATIONS OF THIS BUREAU SHOULD JT2703'BE CHANGED TO CONFORM TO THE ACCEPTED USAGE IN REGARD TO THIS JT2703'MOUNTAIN. JT2703 JT2703 STATION RECOVERY (1938) JT2703 JT2703'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1938 (ACT) JT2703'STATION MOUNT HELENA LIES ABOUT 7 MILES N OF CALISTOGA, AND ABOUT JT2703'4 MILES NE OF SUMMIT OF GRADE WHERE STATE HIGHWAY 29 CROSSES JT2703'DIVIDE, AND ON HIGHEST PART OF MOUNT HELENA, IN A HIGH ROCK JT2703'OUTCROP, 34.8 FEET NW OF NW CORNER OF LOOKOUT TOWER. JT2703' JT2703'STATION MARK IS A CROSS CUT IN TOP OF 1/2-INCH COPPER BOLT JT2703'CEMENTED IN BEDROCK AND PROJECTING 1/4 INCH. NOT STAMPED. JT2703' JT2703'REFERENCE MARK NO. 1 IS A STANDARD DISK SET IN BEDROCK FLUSH JT2703'WITH GROUND AND IS ABOUT ON THE SAME LEVEL AS STATION MARK. JT2703'NOT STAMPED. JT2703' JT2703'REFERENCE MARK NO. 2 IS A STANDARD DISK, SET IN BEDROCK WHICH JT2703'PROJECTS ABOUT 2 INCHES AND IS ABOUT 6 FEET LOWER THAN STATION JT2703'MARK. NOT STAMPED. JT2703' JT2703'AZIMUTH MARK SET IN A ROCK LEDGE 1/2 MILE ENE OF STATION AND JT2703'IS ABOUT 100 YARDS, N OF ROAD TO STATION. IT IS A STANDARD JT2703'BRONZE DISK SET IN OUTCROPPING LEDGE ROCK. WAS ESTABLISHED IN JT2703'1938 BUT NOT STAMPED. JT2703' JT2703'TO REACH FROM RAILROAD DEPOT IN CALISTOGA, GO W AND N ON STATE JT2703'HIGHWAY 29 FOR 8.3 MILES TO TOP OF GRADE. CONTINUE 0.3 MILE JT2703'TO DIRT ROAD TO LEFT, TURN LEFT AND GO 0.05 MILE TO LOCKED JT2703'WIRE GATE, PASS THROUGH GATE AND FOLLOW ONLY ROAD 6.0 MILES JT2703'TO LOOKOUT ON HIGHEST PART OF MOUNT HELENA. STATION IS 35 FEET JT2703'NW OF LOOKOUT. JT2703' JT2703'NOTE--THESE TWO REFERENCE MARKS WERE ESTABLISHED IN 1922. JT2703 JT2703 STATION RECOVERY (1948) JT2703 JT2703'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1948 (CTH) JT2703'STATION RECOVERED AS DESCRIBED. ALL MARKS FOUND IN GOOD JT2703'CONDITION. A NEW DESCRIPTION FOLLOWS-- JT2703' JT2703'STATION IS LOCATED ABOUT 7 MILES N OF CALISTOGA, ABOUT 4 MILES JT2703'NE OF THE SUMMIT OF THE GRADE WHERE STATE HIGHWAY 29 CROSSES JT2703'THE DIVIDE, ON THE HIGHEST POINT OF MOUNT SAINT HELENA, IN JT2703'A HIGH ROCK OUTCROP, AND 34.8 FEET NW OF THE NW CORNER OF THE JT2703'LOOKOUT TOWER. JT2703' JT2703'STATION IS MARKED BY A CROSS IN THE TOP OF A 1/2-INCH BOLT. JT2703'IT IS UNSTAMPED. JT2703' JT2703'REFERENCE MARK 1 IS A BRONZE REFERENCE DISK SET IN BEDROCK. JT2703'IT IS FLUSH WITH THE SURFACE AT STATION ELEVATION AND IS JT2703'STAMPED MT HELENA NO 1 1921. JT2703' JT2703'REFERENCE MARK 2 IS A BRONZE REFERENCE DISK SET IN BEDROCK JT2703'PROJECTING ABOUT 2 INCHES ABOVE THE SURFACE AND IS APPROXIMATELY JT2703'6 FEET BELOW STATION ELEVATION. DISK IS STAMPED MT HELENA NO 2 JT2703'1921. JT2703' JT2703'AZIMUTH MARK IS A BRONZE DISK SET IN OUTCROPPING LEDGE ROCK, JT2703'APPROXIMATELY 1/2 MILE ENE OF THE STATION, AND 100 YARDS JT2703'N OF THE ROAD TO THE STATION. DISK IS STAMPED MT HELENA 1938. JT2703' JT2703'MT. HELENA ECC. IS A BRONZE DISK SET IN BEDROCK, 4.224 METERS JT2703'SW OF THE STATION. DISK IS STAMPED MT HELENA ECC 1938. JT2703' JT2703'TO REACH STATION FROM RAILROAD DEPOT IN CALISTOGA, GO W AND N JT2703'ON STATE HIGHWAY 29 FOR 8.3 MILES TO TOP OF GRADE, CONTINUE JT2703'0.3 MILE TO DIRT ROAD TO LEFT, TURN LEFT AND GO 0.05 MILE JT2703'TO A LOCKED WIRE GATE (KEY MAY BE OBTAINED FROM MR. ERICKSON OF JT2703'THE STATE FOREST RANGER STATION IN ST. HELENA), PASS THROUGH JT2703'THE GATE AND FOLLOW THE ONLY ROAD FOR 6.0 MILES TO THE LOOKOUT JT2703'ON HIGHEST PART OF MT. HELENA. STATION IS 35 FEET NW OF JT2703'THE LOOKOUT. JT2703 JT2703 STATION RECOVERY (1949) JT2703 JT2703'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1949 (WRH) JT2703'THE STATION WAS RECOVERED AS DESCRIBED. ALL THE MARKS WERE JT2703'IN GOOD CONDITION. A COMPLETE DESCRIPTION FOLLOWS. JT2703' JT2703'THE STATION IS LOCATED ON THE HIGHEST POINT OF MOUNT HELENA. JT2703'IT IS ABOUT 16.5 MILES AIRLINE NORTH OF SANTA ROSA, ABOUT 12 JT2703'MILES AIRLINE NORTHEAST OF WINDSOR AND ABOUT 7 MILES AIRLINE JT2703'NORTH NORTHWEST OF CALISTOGA. JT2703' JT2703'THE STATION IS 34.8 FEET NORTHWEST OF THE NORTHWEST CORNER OF JT2703'THE CALIFORNIA STATE FOREST SERVICE LOOKOUT TOWER. IT IS A JT2703'COPPER BOLT THAT HAS A CROSS ON ITS TOP AND IS SET IN A DRILL JT2703'HOLE IN OUTCROPPING BEDROCK (NOTE 2). THE MARK IS NOT STAMPED. JT2703' JT2703'REFERENCE MARK NUMBER ONE IS A STANDARD DISK THAT IS SET IN JT2703'A DRILL HOLE IN OUTCROPPING BEDROCK THAT IS FLUSH WITH THE JT2703'GROUND AND ABOUT THE SAME ELEVATION AS THE STATION. THE DISK JT2703'IS STAMPED MT HELENA NO 1 1921 AND IS SET AS DESCRIBED IN NOTE JT2703'12A. JT2703' JT2703'REFERENCE MARK NUMBER TWO IS A STANDARD DISK THAT IS SET IN JT2703'A DRILL HOLE IN OUTCROPPING BEDROCK THAT PROJECTS 2 INCHES ABOVE JT2703'THE GROUND AND IS ABOUT 4 FEET LOWER THAN THE STATION. THE JT2703'DISK IS STAMPED MT HELENA NO 2 1921 AND IS SET AS DESCRIBED IN JT2703'NOTE 12A. JT2703' JT2703'MT HELENA ECC IS A STANDARD STATION DISK THAT IS SET IN A DRILL HOLE JT2703'IN OUTCROPPING BEDROCK THAT IS 2 FEET LOWER THAN THE STATION. JT2703'THE DISK IS STAMPED MT HELENA ECC 1938 AND IS SET AS DESCRIBED JT2703'IN NOTE 2. JT2703' JT2703'THE AZIMUTH MARK IS 10 FEET EAST OF THE WEST EDGE OF A CLIFF JT2703'THAT IS ON THE WEST END OF A LOWER RIDGE OF MOUNT HELENA AND JT2703'ABOUT 150 YARDS NORTH OF THE ROAD THAT GOES TO THE STATION. JT2703'IT IS A STANDARD AZIMUTH MARK DISK THAT IS SET IN A DRILL JT2703'HOLE IN OUTCROPPING BEDROCK. THE DISK IS STAMPED MT HELENA 1938 JT2703'AND IS SET AS DESCRIBED IN NOTE 12A. TO REACH THE MARK FROM JT2703'THE STATION GO EASTERLY ON THE ROAD FOR 0.4 MILE TO A SHARP JT2703'TURN TO THE RIGHT. FROM THIS POINT THE MARK IS ABOUT 150 JT2703'YARDS NORTH ON A SMALL LEDGE AS DESCRIBED. JT2703' JT2703'THE MOUNT HELENA LOOKOUT TOWER IS A STANDARD CALIFORNIA STATE JT2703'FOREST SERVICE LOOKOUT TOWER THAT IS MADE OF WOOD AND PAINTED JT2703'WHITE. IT IS ABOUT 30 FEET HIGH AND THE WHOLE TOWER IS ENCLOSED. JT2703'ENTRANCE TO THE TOWER IS MADE ON THE SOUTH SIDE. THE CENTER JT2703'OF THE BASE OF THE TOWER WILL SERVE AS THE SUB. STATION AND JT2703'IS 1.58 METERS LOWER THAN THE STATION. JT2703' JT2703'TO REACH THE STATION FROM THE U.S. POST OFFICE IN CALISTOGA JT2703'GO NORTH AND WEST ON STATE HIGHWAY 29 FOR 8.4 MILES TO THE TOP JT2703'OF THE GRADE AND THEN CONTINUE ON THE HIGHWAY FOR 0.3 MILE JT2703'TO A GRAVELED ROAD LEFT. TURN LEFT AND GO UP GRADE FOR 0.05 JT2703'MILE TO A LOCKED GATE. (A CALIFORNIA STATE FOREST SERVICE KEY JT2703'WILL UNLOCK THE GATE) GO THROUGH THE GATE AND FOLLOW THE JT2703'GRAVELED ROAD UPGRADE FOR 6.0 MILES TO THE HIGHEST POINT OF JT2703'MOUNT HELENA, THE LOOKOUT TOWER AND THE STATION AS DESCRIBED. JT2703' JT2703'OBSERVATIONS TAKEN FROM A 4 FT. WOOD STAND. JT2703 JT2703 STATION RECOVERY (1960) JT2703 JT2703'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1960 (OSR) JT2703'STATION WAS RECOVERED AS DESCRIBED BY W.R.H. IN 1949. JT2703 JT2703 STATION RECOVERY (1974) JT2703 JT2703'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1974 (RDM) JT2703'THE STATION MARK, REFERENCE MARKS 1 AND 2, MT. HELENA ECC 1949 JT2703'AND THE AZIMUTH MARK WERE RECOVERED IN GOOD CONDITION AS JT2703'DESCRIBED AND THE 1949 RECOVERY NOTE IS ADEQUATE. JT2703' JT2703'AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--7 MILES JT2703'NORTH OF CALISTOGA