National Geodetic Survey, Retrieval Date = JULY 29, 2007 JT2754 *********************************************************************** JT2754 DESIGNATION - BIG MOUNTAIN JT2754 PID - JT2754 JT2754 STATE/COUNTY- CA/SONOMA JT2754 USGS QUAD - TOMBS CREEK (1978) JT2754 JT2754 *CURRENT SURVEY CONTROL JT2754 ___________________________________________________________________ JT2754* NAD 83(1992)- 38 42 37.19820(N) 123 08 41.83570(W) ADJUSTED JT2754* NAVD 88 - 816.3 (meters) 2678. (feet) VERTCON JT2754 ___________________________________________________________________ JT2754 EPOCH DATE - 1991.35 JT2754 LAPLACE CORR- 2.90 (seconds) DEFLEC99 JT2754 GEOID HEIGHT- -30.85 (meters) GEOID03 JT2754 JT2754 HORZ ORDER - SECOND JT2754 JT2754.The horizontal coordinates were established by classical geodetic methods JT2754.and adjusted by the National Geodetic Survey in March 1994. JT2754.The horizontal coordinates are valid at the epoch date displayed above. JT2754.The epoch date for horizontal control is a decimal equivalence JT2754.of Year/Month/Day. JT2754 JT2754.The NAVD 88 height was computed by applying the VERTCON shift value to JT2754.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) JT2754 JT2754.The Laplace correction was computed from DEFLEC99 derived deflections. JT2754 JT2754.The geoid height was determined by GEOID03. JT2754 JT2754; North East Units Scale Factor Converg. JT2754;SPC CA 2 - 616,480.031 1,900,422.605 MT 0.99993589 -0 43 18.7 JT2754;SPC CA 2 - 2,022,568.24 6,234,969.83 sFT 0.99993589 -0 43 18.7 JT2754;UTM 10 - 4,284,642.676 487,397.127 MT 0.99960196 -0 05 26.3 JT2754 JT2754! - Elev Factor x Scale Factor = Combined Factor JT2754!SPC CA 2 - 0.99987677 x 0.99993589 = 0.99981267 JT2754!UTM 10 - 0.99987677 x 0.99960196 = 0.99947878 JT2754 JT2754: Primary Azimuth Mark Grid Az JT2754:SPC CA 2 - LEDFORD 059 37 14.1 JT2754:UTM 10 - LEDFORD 058 59 21.7 JT2754 JT2754|---------------------------------------------------------------------| JT2754| PID Reference Object Distance Geod. Az | JT2754| dddmmss.s | JT2754| JT2743 LEDFORD APPROX. 5.3 KM 0585355.4 | JT2754| DB4150 BIG MOUNTAIN RM 1 10.875 METERS 09153 | JT2754| DB4151 BIG MOUNTAIN RM 2 19.558 METERS 16123 | JT2754|---------------------------------------------------------------------| JT2754 JT2754 SUPERSEDED SURVEY CONTROL JT2754 JT2754 NAD 83(1986)- 38 42 37.19425(N) 123 08 41.83298(W) AD(1984.00) 2 JT2754 NAD 27 - 38 42 37.50700(N) 123 08 37.80700(W) AD( ) 2 JT2754 NGVD 29 (07/19/86) 815.4 (m) 2675. (f) VERT ANG JT2754 JT2754.Superseded values are not recommended for survey control. JT2754.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. JT2754.See file dsdata.txt to determine how the superseded data were derived. JT2754 JT2754_U.S. NATIONAL GRID SPATIAL ADDRESS: 10SDH8739784643(NAD 83) JT2754_MARKER: Z = SEE DESCRIPTION JT2754_SETTING: 0 = UNSPECIFIED SETTING JT2754 JT2754 HISTORY - Date Condition Report By JT2754 HISTORY - 1949 MONUMENTED CGS JT2754 HISTORY - 1961 SEE DESCRIPTION CGS JT2754 JT2754 STATION DESCRIPTION JT2754 JT2754'DESCRIBED BY COAST AND GEODETIC SURVEY 1949 (WRH) JT2754'THE STATION IS LOCATED ON A ROUND TOPPED HILL THAT HAS TREES JT2754'AROUND THE SIDE AND THE TOP IS BARE, 15 MILES EAST NORTHEAST JT2754'OF BLACK POINT, 10 MILES EAST OF ANNAPOLIS AND 7 MILES WEST JT2754'OF SKAGGS SPRINGS. IT IS ON THE HIGHEST POINT. JT2754' JT2754'STATION MARK, STAMPED BIG MTN 1938, IS A STANDARD USFS BRONZE JT2754'DISK SET IN AN IRREGULAR MASS OF CONCRETE THAT IS FLUSH JT2754'WITH THE GROUND. JT2754' JT2754'REFERENCE MARK NUMBER 1, STAMPED NO 1 1941, IS A STANDARD JT2754'USGS REFERENCE MARK DISK SET IN THE TOP OF A PRECAST CONCRETE JT2754'POST THAT PROJECTS 10 INCHES ABOVE THE GROUND AND IS 18 INCHES JT2754'LOWER THAN THE STATION. JT2754' JT2754'REFERENCE MARK NUMBER 2, STAMPED NO 2 1941, IS A STANDARD JT2754'USGS REFERENCE MARK DISK SET IN THE TOP OF A PRECAST CONCRETE JT2754'POST THAT PROJECTS 4 INCHES ABOVE THE GROUND AND IS 4 FEET JT2754'LOWER THAN THE STATION. JT2754' JT2754'STATION LEDFORD CAN BE USED FOR AN AZIMUTH MARK. TO REACH JT2754'SEE THE DESCRIPTION FOR LEDFORD. JT2754' JT2754'THE STATION IS REACHED AS FOLLOWS--FROM THE SWIMMING POOL JT2754'IN SKAGGS SPRINGS, GO WEST ON PAVED ROAD TOWARDS STEWART POINT JT2754'FOR 4.1 MILES TO A CEMENT BRIDGE OVER WARM SPRINGS. AFTER JT2754'CROSSING BRIDGE TURN SHARP RIGHT ON DIRT ROAD AND GO 1.0 MILE. JT2754'TURN LEFT AND GO 100 FEET TO LOCKED GATE (KEY CAN BE OBTAINED JT2754'FROM MR. BAXTER AT THE WHITE RANCH WHICH IS ABOUT 1.0 MILE JT2754'BEFORE REACHING THE WARM SPRING BRIDGE). FROM GATE CONTINUE JT2754'UP GRADE ON DIRT ROAD FOR 5.0 MILES TO A LARGE PINE TREE JT2754'WITH TWO BLAZED TRIANGLES ON THE EAST AND NORTH SIDES. TURN JT2754'LEFT, SOUTH, ON DIM TRACK ROAD AND GO 1.5 MILES TO THE JT2754'HIGHEST POINT OF HILL AND STATION. JT2754 JT2754 STATION RECOVERY (1961) JT2754 JT2754'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1961 (IRR) JT2754'THE STATION MARK AND REFERENCE MARKS WERE RECOVERED IN GOOD JT2754'CONDITION AND THE 1949 DESCRIPTION IS ADEQUATE EXCEPT THE JT2754'STATION MARK WAS FOUND STAMPED F.S.M. BIG MTN. ELEVATION FEET JT2754'1938, REFERENCE MARK NUMBER 1 WAS FOUND STAMPED NO 1 1942, JT2754'AND REFERENCE MARK NUMBER 2 WAS FOUND STAMPED NO 2 1942.