National Geodetic Survey, Retrieval Date = JANUARY 14, 2003 JT2438 *********************************************************************** JT2438 DESIGNATION - PETALUMA JT2438 PID - JT2438 JT2438 STATE/COUNTY- CA/SONOMA JT2438 USGS QUAD - GLEN ELLEN (1980) JT2438 JT2438 *CURRENT SURVEY CONTROL JT2438 ___________________________________________________________________ JT2438* NAD 83(1992)- 38 20 44.95052(N) 122 34 47.68781(W) ADJUSTED JT2438* NAVD 88 - 751.5 (meters) 2466. (feet) VERTCON JT2438 ___________________________________________________________________ JT2438 EPOCH DATE - 1991.35 JT2438 LAPLACE CORR- 2.22 (seconds) DEFLEC99 JT2438 GEOID HEIGHT- -31.18 (meters) GEOID99 JT2438 JT2438 HORZ ORDER - FIRST JT2438 JT2438.The horizontal coordinates were established by classical geodetic methods JT2438.and adjusted by the National Geodetic Survey in March 1994. JT2438.The horizontal coordinates are valid at the epoch date displayed above. JT2438.The epoch date for horizontal control is a decimal equivalence JT2438.of Year/Month/Day. JT2438 JT2438.The NAVD 88 height was computed by applying the VERTCON shift value to JT2438.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) JT2438 JT2438.The Laplace correction was computed from DEFLEC99 derived deflections. JT2438 JT2438.The geoid height was determined by GEOID99. JT2438 JT2438; North East Units Scale Converg. JT2438;SPC CA 2 - 575,552.644 1,949,305.394 MT 0.99999719 -0 21 56.2 JT2438;SPC CA 2 - 1,888,292.30 6,395,346.11 sFT 0.99999719 -0 21 56.2 JT2438;UTM 10 - 4,244,269.044 536,708.697 MT 0.99961659 +0 15 38.3 JT2438 JT2438: Primary Azimuth Mark Grid Az JT2438:SPC CA 2 - PETALUMA AZ MK 174 18 21.4 JT2438:UTM 10 - PETALUMA AZ MK 173 40 46.9 JT2438 JT2438|---------------------------------------------------------------------| JT2438| PID Reference Object Distance Geod. Az | JT2438| dddmmss.s | JT2438| JT2439 BENCH MK USGS NR PETALUMA 1939 13.780 METERS 00040 | JT2438| DB4931 PETALUMA AZ MK 1735625.2 | JT2438| DB4932 PETALUMA RM 1 72.832 METERS 20959 | JT2438| DB4933 PETALUMA RM 2 39.972 METERS 27515 | JT2438| JT2711 SONOMA COUNTY AIRPORT BEACON APPROX.26.3 KM 3140640.4 | JT2438|---------------------------------------------------------------------| JT2438 JT2438 SUPERSEDED SURVEY CONTROL JT2438 JT2438 NAD 83(1986)- 38 20 44.94318(N) 122 34 47.68547(W) AD(1984.00) 1 JT2438 NAD 27 - 38 20 45.25500(N) 122 34 43.74500(W) AD( ) 1 JT2438 NGVD 29 - 750.6 (m) 2463. (f) VERT ANG JT2438 JT2438.Superseded values are not recommended for survey control. JT2438.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. JT2438.See file dsdata.txt to determine how the superseded data were derived. JT2438 JT2438_U.S. NATIONAL GRID SPATIAL ADDRESS: 10SEH3670944269(NAD 83) JT2438_MARKER: DO = NOT SPECIFIED OR SEE DESCRIPTION JT2438_SETTING: 66 = SET IN ROCK OUTCROP JT2438 JT2438 HISTORY - Date Condition Report By JT2438 HISTORY - 1930 MONUMENTED CGS JT2438 HISTORY - 1938 SEE DESCRIPTION CGS JT2438 HISTORY - 1939 SEE DESCRIPTION CGS JT2438 HISTORY - 1941 SEE DESCRIPTION CGS JT2438 HISTORY - 1948 SEE DESCRIPTION CGS JT2438 HISTORY - 1949 SEE DESCRIPTION CGS JT2438 HISTORY - 1959 SEE DESCRIPTION CGS JT2438 HISTORY - 1960 SEE DESCRIPTION CGS JT2438 HISTORY - 1969 SEE DESCRIPTION USE JT2438 HISTORY - 1969 SEE DESCRIPTION CGS JT2438 JT2438 STATION DESCRIPTION JT2438 JT2438'DESCRIBED BY COAST AND GEODETIC SURVEY 1930 (GLB) JT2438'ABOUT 6 MILES NORTHEAST OF PETALUMA, ON HIGHEST PART OF FAIRLY JT2438'FLAT RIDGE AND ABOUT 20 FEET SOUTHEAST OF LARGE CAIRN. TO JT2438'REACH FROM PETALUMA, GO NORTH 2.8 MILES ON WASHINGTON STREET JT2438'TO CROSSROAD, GO WEST 0.8 MILE, AND THEN NORTH 5.5 MILES TO JT2438'GATE SWINGING ON LARGE OAK TREE ON PROPERTY OF MRS. STEVENS, JT2438'FOLLOW ROAD THROUGH RANCH YARD, AND GO UP HILL ABOUT ONE-HALF JT2438'MILE TO STATION SITE. MARKED BY STANDARD STATION DISK IN JT2438'BEDROCK, NOTE 2. REFERENCE MARKS ARE STANDARD REFERENCE DISKS JT2438'IN BEDROCK, NOTE 12A. NO. 1 IS 72.867 METERS (239.06 FEET) JT2438'(SLOPE) FROM STATION IN AZIMUTH 29 DEG 59 MIN. NO. 2 IS JT2438'131.140 FEET (SLOPE) FROM STATION IN AZIMUTH 95 DEG 16 MIN. JT2438 JT2438 STATION RECOVERY (1938) JT2438 JT2438'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1938 (ACT) JT2438'STATION LIES ABOUT 6 MILES NE OF PETALUMA, ON HIGHEST PART JT2438'OF FAIRLY FLAT RIDGE AND ABOUT 20 FEET SE OF LARGE ROCK CAIRN. JT2438' JT2438'STATION MARK IS A STANDARD BRONZE DISK WEDGED IN A DRILL HOLE JT2438'IN A BURIED BOULDER, WHICH PROJECTS ABOUT 5 INCHES AND STAMPED JT2438'PETALUMA 1929. JT2438' JT2438'REFERENCE MARKS NOS. 1 AND 2 ARE STANDARD BRONZE DISKS SET JT2438'IN DRILL HOLES IN OUTCROPPING BEDROCK, AND STAMPED PETALUMA JT2438'1929. JT2438' JT2438'REFERENCE MARK NO. 1 PROJECTS ABOUT 1-1/2 FEET AND IS ABOUT JT2438'3 TO 4 FEET LOWER THAN STATION MARK. JT2438' JT2438'REFERENCE MARK NO. 2 PROJECTS ABOUT 3 INCHES AND IS ABOUT ON JT2438'THE SAME LEVEL AS STATION MARK. JT2438' JT2438'TO REACH FROM PETALUMA, GO N 2.8 MILES ON WASHINGTON STREET JT2438'TO CROSS ROAD, GO W (LEFT) 0.8 MILE TO SIGN READING MOUNTAIN JT2438'ROAD, AND THEN N (RIGHT) 5.5 MILES TO GATE SWINGING ON LARGE JT2438'OAK TREE ON PROPERTY OF MRS. STEVENS, TURN LEFT THROUGH GATE JT2438'AND FOLLOW WINDING ROAD UPHILL TO ANOTHER GATE, PASS THROUGH JT2438'GATE AND UPHILL TO RANCH, PASS BY RANCH HOUSE AND ON UPHILL JT2438'TO STATION. (1/2 MILE). JT2438 JT2438 STATION RECOVERY (1939) JT2438 JT2438'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1939 (FGJ) JT2438'STATION ABOUT 6 MILES NE OF PETALUMA, ON HIGHEST PART OF JT2438'MOUNTAIN, FAIRLY FLAT IN VICINITY. IT IS ABOUT 20 FEET S OF JT2438'LARGE CAIRN. JT2438' JT2438'STATION AND TWO REFERENCE MARKS RECOVERED IN GOOD CONDITION. JT2438' JT2438'U.S.G.S. B.M., NOT STAMPED, IS IN SLOPING BOULDER AT BASE OF JT2438'CAIRN. JT2438' JT2438'TO REACH FROM PETALUMA GO NE 2.8 MILES ON WASHINGTON STREET, JT2438'TURN LEFT NW 0.8 MILE ON PAVED ROAD TO GRAVEL ROAD ON RIGHT JT2438'AT SIGN MOUNTAIN ROAD, TURN RIGHT NE AND GO 5.6 MILES TO JT2438'BOARD GATE ON LEFT SWINGING ON LARGE OAK TREE ON PROPERTY JT2438'OF MRS. STEVENS, OPPOSITE FARMHOUSE, TURN LEFT, FOLLOW DIRT JT2438'ROAD 0.9 MILE TO RANCH, PASS THROUGH RANCH BUILDINGS, TAKE JT2438'LEFT FORK AND CONTINUE 0.3 MILE TO HIGHEST POINT AND STATION. JT2438 JT2438 STATION RECOVERY (1941) JT2438 JT2438'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1941 (JCS) JT2438'STATION VISITED TO REESTABLISH STATION MARK AND ONE REFERENCE JT2438'MARK, WHICH HAD BEEN REMOVED. JT2438' JT2438'STATION IS LOCATED ON HIGHEST PART OF THE SONOMA MOUNTAINS, JT2438'ABOUT 6 MILES NORTHEAST OF PETALUMA, ON PROPERTY TENANTED BY JT2438'MR. JOHN PALM. THE TOP OF THE MOUNTAIN IS FAIRLY FLAT. JT2438' JT2438'TO REACH FROM PETALUMA, GO NORTH ON WASHINGTON STREET 2.8 JT2438'MILES TO A CROSSROAD. TURN LEFT (NORTHWEST) AND FOLLOW PAVED JT2438'ROAD 0.8 MILE TO A GRAVEL ROAD RIGHT AT SIGN SONOMA MOUNTAIN JT2438'RD. TURN RIGHT (NORTHEAST) AND FOLLOW THIS GRAVEL ROAD 5.6 MILES JT2438'TO A BOARD GATE ON THE LEFT SWINGING ON A LARGE OAK TREE, JUST JT2438'BEYOND A FARMHOUSE. TURN LEFT THROUGH THIS GATE AND PROCEED JT2438'ALONG DIRT ROAD 0.9 MILE TO RANCH HOUSES (NOW TENANTED BY MR. JT2438'JOHN PALM). CONTINUE PAST THE HOUSES, TAKE LEFT FORK AND JT2438'CONTINUE 0.3 MILE TO TOP OF HILL AND STATION. JT2438' JT2438'STATION IS ABOUT 45 FEET SOUTH OF A LARGE CAIRN, RATHER THAN JT2438'20 FEET AS DESCRIBED IN THE 1930 DESCRIPTION AND 1939 RECOVERY JT2438'NOTE. THE ORIGINAL DISK HAS BEEN REMOVED, BUT THE DRILL HOLE JT2438'AND IMPRINT OF THE DISK WERE EVIDENT. THE REMAINS OF THE OLD JT2438'SIGNAL WERE AT THIS SITE, AND PATCHES OF CEMENT SURROUNDED THE JT2438'DRILL HOLE. A NEW DISK, STAMPED PETALUMA 1930 1941, WAS JT2438'CEMENTED IN THE OLD DRILL HOLE, WHICH IS IN OUTCROPPING JT2438'BEDROCK. JT2438' JT2438'REFERENCE MARK NO. 1 WAS FOUND INTACT. IT IS A STANDARD JT2438'REFERENCE DISK STAMPED PETALUMA NO 1 1929, CEMENTED IN A JT2438'DRILL HOLE IN OUTCROPPING BEDROCK, WHICH PROJECTS ABOUT 1-1/2 JT2438'FEET ABOVE THE GROUND. IT IS 238.781 FEET SOUTH-SOUTHWEST JT2438'OF THE STATION. (THE 1930 DESCRIPTION GIVES 239.060 FEET JT2438'AND THE 1939 RECOVERY 238.408 FEET FOR THIS DISTANCE). JT2438' JT2438'REFERENCE MARK NO. 2 HAS BEEN REMOVED, BUT THE OLD DRILL HOLE JT2438'AND IMPRINT OF THE DISK WERE FOUND IN OUTCROPPING BEDROCK, JT2438'WITH PATCHES OF CEMENT ABOUT THE DRILL HOLE. A NEW STANDARD JT2438'REFERENCE DISK STAMPED PETALUMA NO 2 1930 1941 WAS CEMENTED JT2438'IN THE OLD DRILL HOLE. IT IS 131.150 FEET WEST-NORTHWEST OF JT2438'THE STATION. (THE 1930 DISTANCE WAS GIVEN AS 131.140 FEET, JT2438'AND THE 1939 AS 131.133 FEET). JT2438' JT2438'THE U.S. GEOLOGICAL SURVEY BENCH MARK, MENTIONED IN THE JT2438'RECOVERY OF 1939, WAS ALSO MISSING, BUT THE BRONZE SHANK JT2438'OF THE DISK WAS FOUND IN THE DRILL HOLE. IT IS IN OUTCROPPING JT2438'BEDROCK, AT THE WEST TOE OF THE CAIRN. THE BEDROCK PROJECTS JT2438'ABOUT ONE FOOT ABOVE GROUND AND THE DRILL HOLE AND SHANK JT2438'ARE ABOUT 4 INCHES BELOW THE TOP, ON THE WEST SIDE. NO NEW JT2438'MARK WAS SET HERE. THE SHANK WAS LEFT INTACT IN THE ROCK, JT2438'AND A PATCH OF BLUE WAS PAINTED ON THE ROCK. IT IS 45.200 JT2438'FEET NORTH OF THE STATION. (THE 1930 DISTANCE WAS 45.208 JT2438'FEET.) JT2438' JT2438'MR. PALM, WHO WAS FAMILIAR WITH THE OLD MARKS, CONFIRMED JT2438'THE LOCATION OF THE MARKS REPLACED. JT2438' JT2438'STATION LAUREL 1929 WILL SERVE AS AN AZIMUTH. JT2438' JT2438'THE FOLLOWING DIRECTIONS WERE DETERMINED WITH A 4-INCH THEODOLITE, JT2438'USING THREE REPETITIONS, DIRECT AND REVERSED, AND CLOSING JT2438'THE HORIZON. JT2438 JT2438 STATION RECOVERY (1948) JT2438 JT2438'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1948 (CTH) JT2438'STATION WAS RECOVERED AS DESCRIBED AND ALL MARKS FOUND IN JT2438'EXCELLENT CONDITION. A NEW DESCRIPTION FOLLOWS. JT2438' JT2438'STATION IS LOCATED ABOUT 6 MILES NORTHEAST OF PETALUMA, 3 MILES JT2438'NORTHEAST OF PENNGROVE, ON A LONG, LOW, FLAT MOUNTAIN AND ON JT2438'THE PROPERTY OF THE ANDERSON ESTATE. STATION IS MARKED BY JT2438'A STANDARD DISC SET IN A BURIED BOULDER FLUSH WITH THE GROUND. JT2438'IT IS 50 FEET SOUTH OF AN EAST-WEST FENCELINE AND 45 FEET JT2438'SOUTH OF A LARGE PILE OF ROCKS. IT IS STAMPED PETALUMA 1930. JT2438' JT2438'REFERENCE MARK NO. 1 IS A STANDARD DISC SET IN A 4X3X1 FOOT JT2438'BOULDER. IT IS STAMPED PETALUMA 1929. JT2438' JT2438'REFERENCE MARK NO. 2 IS A STANDARD DISC SET IN A SMALL BOULDER, JT2438'58 FEET SOUTH OF AN EAST-WEST FENCELINE, AND IS STAMPED JT2438'PETALUMA NO 2 1930 1941. JT2438' JT2438'THE UNITED STATES GEOLOGICAL MARK IS A LEAD PLUG SET IN A JT2438'SLOPING ROCK ON THE WEST SIDE AND AT THE BASE OF, A LARGE JT2438'PILE OF ROCKS. JT2438' JT2438'TO REACH THE STATION FROM THE CORNER OF MAIN STREET AND JT2438'PENNGROVE AVENUE IN THE TOWN OF PENNGROVE, GO EAST ON PENNGROVE JT2438'AVENUE FOR 2.8 MILES TO BLACK TOP ROAD LEFT AND SIGN SONOMA JT2438'ROAD TURN LEFT, FOLLOWING ROAD FOR 5.7 MILES TO GATE ON LEFT, JT2438'HINGED ON A LARGE OAK TREE OPPOSITE A FARM HOUSE. GO THROUGH JT2438'GATE FOLLOWING FARM ROAD FOR .9 MILE TO A RANCH, PASS RANCH JT2438'BUILDINGS AND CONTINUE .3 MILE ON A PASTURE ROAD TO STATION JT2438'SITE ON RIGHT JUST BEFORE REACHING AN EAST-WEST JT2438'FENCELINE. JT2438 JT2438 STATION RECOVERY (1949) JT2438 JT2438'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1949 (WRH) JT2438'THE STATION MARK AND TWO REFERENCE MARKS WERE FOUND AS DESCRIBED JT2438'AND IN GOOD CONDITION. AN AZIMUTH MARK WAS ESTABLISHED AT THIS JT2438'TIME AND DESCRIBED BELOW. A NEW DESCRIPTION FOLLOWS. JT2438' JT2438'THE STATION IS LOCATED ABOUT 6 MILES NORTHEAST OF PETALUMA, JT2438'ON THE HIGHEST PART OF A FAIRLY FLAT RIDGE THAT IS BARE ON TOP. JT2438' JT2438'STATION MARK, STAMPED PETALUMA 1930 1941, IS A STANDARD DISK JT2438'CEMENTED IN A DRILL HOLE IN OUTCROPPING BEDROCK THAT IS FLUSH JT2438'WITH THE GROUND. IT IS 20 FEET SOUTHEAST OF A LARGE CAIRN. JT2438' JT2438'REFERENCE MARK NUMBER 1, STAMPED PETALUMA NO 1 1929, IS A JT2438'STANDARD DISK CEMENTED IN A DRILL HOLE IN OUTCROPPING BEDROCK JT2438'THAT PROJECTS 12 INCHES ABOVE THE GROUND AND IS ABOUT 3 FEET JT2438'LOWER THAN THE STATION. JT2438' JT2438'REFERENCE MARK NUMBER 2, STAMPED PETALUMA NO 2 1930 1941, JT2438'IS A STANDARD DISK CEMENTED IN A DRILL HOLE IN OUTCROPPING JT2438'BEDROCK THAT PROJECTS ABOUT 6 INCHES ABOVE THE GROUND AND JT2438'IS ABOUT THE SAME ELEVATION AS THE STATION. JT2438' JT2438'AZIMUTH MARK, STAMPED PETALUMA 1949, IS A STANDARD DISK JT2438'CEMENTED IN A DRILL HOLE IN A BOULDER THAT PROJECTS 3 FEET JT2438'ABOVE THE GROUND AND IS 2 FEET IN DIAMETER. TO REACH FROM JT2438'THE STATION CONTINUE EASTERLY ON MOUNTAIN RD., FROM THE JT2438'SWINGING GATE MENTIONED IN GOING TO THE STATION, FOR 0.8 MILE JT2438'TO AZIMUTH MARK ON THE RIGHT. IT IS 100 YARDS WEST OF RANCH JT2438'HOUSE, 37 FEET SOUTH OF ROAD AND 25 FEET NORTH OF WIRE FENCE. JT2438' JT2438'THE STATION IS REACHED AS FOLLOWS--FROM THE U.S. POST OFFICE JT2438'IN PENNGROVE GO NORTH FOR 0.15 MILE TO CROSSROADS. TURN RIGHT, JT2438'EAST, ON OLD ADOBE RD. AND GO 2.8 MILES. TURN LEFT ON MOUNTAIN JT2438'RD. AND GO 5.3 MILES TO A SWINGING GATE ON LARGE OAK TREE JT2438'ON THE LEFT. KEY FOR THIS GATE MAY BE OBTAINED, IF WEATHER JT2438'PERMITS DRIVING OVER ROAD, FROM MR. FRANK BAFFA, WHO HAS THE JT2438'PROPERTY LEASED, AND LIVES 1.0 MILE NORTH ON MOUNTAIN RD. AFTER JT2438'LEAVING OLD ADOBE RD. PASS THROUGH GATE AND CONTINUE ON JT2438'RANCH ROAD FOR ABOUT 0.5 MILE TO ABANDONED BUILDINGS. PASS JT2438'THROUGH YARD AND GO NORTH FOR ABOUT 0.2 MILE TO HIGHEST PART JT2438'OF HILL AND STATION. JT2438 JT2438 STATION RECOVERY (1959) JT2438 JT2438'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1959 (JCM) JT2438'THE STATION MARK, REFERENCE MARK NUMBER 1, REFERENCE MARK JT2438'NUMBER 2, THE USGS MARK, AND THE AZIMUTH MARK WERE RECOVERED JT2438'IN GOOD CONDITION AND THE 1941 AND 1949 DESCRIPTIONS ARE JT2438'ADEQUATE WITH THE FOLLOWING ADDITIONS-- JT2438' JT2438'1. THE STATION MARK IS ABOUT 45 FEET SOUTH OF A LARGE ROCK JT2438'PILE AS DESCRIBED IN 1941 NOT 20 FEET AS DESCRIBED IN 1949. JT2438' JT2438'2. REFERENCE MARK NUMBER 1 WAS RESTAMPED PETALUMA NO 1 1930 JT2438'AND THE AZIMUTH MARK WAS RESTAMPED PETALUMA 1930 1941 ON JT2438'THIS DATE. JT2438' JT2438'3. TO REACH THE AZIMUTH MARK FROM THE SWINGING GATE ON THE JT2438'LARGE OAK TREE MENTIONED IN THE PREVIOUS DESCRIPTIONS GO JT2438'EAST-SOUTHEAST 0.15 MILE TO A METAL GATE. PASS THROUGH THE JT2438'GATE AND CONTINUE EAST-SOUTHEAST 0.3 MILE TO A FORK. TAKE JT2438'THE LEFT FORK AS PER SIGN COTTAGE AND GO EAST ON A GRAVELED JT2438'ROAD 0.3 MILE TO A SMALL RANCH HOUSE AND THE AZIMUTH MARK JT2438'ON THE RIGHT. JT2438 JT2438 STATION RECOVERY (1960) JT2438 JT2438'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1960 (OSR) JT2438'THE STATION WAS RECOVERED AS DESCRIBED BY WALTER R. HELM JT2438'IN 1949 AND J.C. MATHISSON IN 1959. JT2438' JT2438'A 50 FOOT TOWER IS REQUIRED TO SEE TRIANGULATION STATION JT2438'STONY 1930. A FOUR FOOT STAND WILL SEE ALL OTHERS. JT2438 JT2438 STATION RECOVERY (1969) JT2438 JT2438'RECOVERY NOTE BY US ENGINEERS 1969 (GOD) JT2438'STATION IN EXCELLENT CONDITION AS DESCRIBED. FOR KEYS SEE BILL JT2438'HARRELL, 2960 SONOMA MTN. R., PETALUMA, AREA CODE (707) JT2438'795-4756 OR TOM EUBANKS, 2 WINDWARD RD., BELEVEDERE, AREA JT2438'CODE (707) 435-0344. JT2438 JT2438 STATION RECOVERY (1969) JT2438 JT2438'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1969 (WFF) JT2438'STATION WAS RECOVERED AS DESCRIBED AND ALL MARKS WERE FOUND JT2438'IN GOOD CONDITION. THE DESCRIPTION TO REACH THE STATION WAS JT2438'FOUND TO BE COMPLETELY ADEQUATE.