National Geodetic Survey, Retrieval Date = SEPTEMBER 28, 2002 KT1970 *********************************************************************** KT1970 DESIGNATION - MOUNT SANHEDRIN LOOKOUT TOWER KT1970 PID - KT1970 KT1970 STATE/COUNTY- CA/MENDOCINO KT1970 USGS QUAD - SANHEDRIN MTN (1994) KT1970 KT1970 *CURRENT SURVEY CONTROL KT1970 ___________________________________________________________________ KT1970* NAD 83(1992)- 39 30 57.19956(N) 123 05 46.30205(W) ADJUSTED KT1970* NAVD 88 - KT1970 ___________________________________________________________________ KT1970 EPOCH DATE - 1991.35 KT1970 LAPLACE CORR- 9.68 (seconds) DEFLEC99 KT1970 GEOID HEIGHT- -28.45 (meters) GEOID99 KT1970 KT1970 HORZ ORDER - THIRD KT1970 KT1970.The horizontal coordinates were established by classical geodetic methods KT1970.and adjusted by the National Geodetic Survey in March 1994. KT1970.The horizontal coordinates are valid at the epoch date displayed above. KT1970.The epoch date for horizontal control is a decimal equivalence KT1970.of Year/Month/Day. KT1970 KT1970 KT1970.The Laplace correction was computed from DEFLEC99 derived deflections. KT1970 KT1970.The geoid height was determined by GEOID99. KT1970 KT1970; North East Units Scale Converg. KT1970;SPC CA 2 - 705,845.272 1,905,741.655 MT 0.99994294 -0 41 28.0 KT1970;SPC CA 2 - 2,315,760.70 6,252,420.75 sFT 0.99994294 -0 41 28.0 KT1970;UTM 10 - 4,374,032.272 491,731.130 MT 0.99960084 -0 03 40.3 KT1970 KT1970 SUPERSEDED SURVEY CONTROL KT1970 KT1970 NAD 83(1986)- 39 30 57.18637(N) 123 05 46.29527(W) AD(1984.00) 4 KT1970 NAD 27 - 39 30 57.61790(N) 123 05 42.27490(W) AD( ) 3 KT1970 KT1970.Superseded values are not recommended for survey control. KT1970.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. KT1970.See file dsdata.txt to determine how the superseded data were derived. KT1970 KT1970_MARKER: 57 = LOOKOUT TOWER KT1970 KT1970 HISTORY - Date Condition Report By KT1970 HISTORY - 1964 FIRST OBSERVED CGS KT1970 KT1970 STATION DESCRIPTION KT1970 KT1970'DESCRIBED BY COAST AND GEODETIC SURVEY 1964 (JJL) KT1970'LOCATED ABOUT 15 MILES EAST OF WILLITS, 14 MILES NORTHEAST KT1970'OF POTTER VALLEY, 10 MILES NORTH-NORTHWEST OF LAKE PILLSBURY, KT1970'AND ON THE HIGHEST POINT OF A PROMINENT MOUNTAIN LOCALLY KT1970'KNOWN AS MOUNT SANHEDRIN OR BIG SIGNAL PEAK. KT1970' KT1970'TO REACH FROM THE SODA CREEK RANGER STATION THAT IS LOCATED KT1970'ABOUT 5 MILES NORTH AND 11 MILES EAST OF POTTER VALLEY, GO KT1970'NORTH FOR 0.8 MILE TO A Y-FORK AND SIGN SANHEDRIN LO 20. KT1970'TAKE THE LEFT FORK AND FOLLOW THE MAIN-TRAVELED ROAD KT1970'NORTHEASTERLY, AS PER SIGNS SANHEDRIN LO, FOR 15.6 MILES TO A KT1970'Y-FORK. TAKE THE LEFT FORK, AS PER SIGN SANHEDRIN LO, AND KT1970'GO WEST AND SOUTHWEST FOR 2.7 MILES TO THE TOP OF THE KT1970'MOUNTAIN AND THE LOOKOUT TOWER. KT1970' KT1970'THE LOOKOUT TOWER IS A CONCRETE STRUCTURE, PAINTED GREEN, KT1970'AND IS ABOUT 30 FEET SQUARE. IT IS APPROXIMATELY 65 FEET HIGH. KT1970' KT1970'POINT INTERSECTED WAS THE TOP AND CENTER OF THE LOOKOUT TOWER. KT1970' KT1970'OFFICE NOTE--THE 1942 LOOKOUT TOWER HAS BEEN REMOVED AND A NEW KT1970'TOWER BUILT IN 1961. ORIGINALLY CALLED BIG SIGNAL LOT. KT1970'LATITUDE--39 DEG 30 MIN 57.481 SEC LONGITUDE--123 DEG 05 KT1970'MIN 42.422 SEC