National Geodetic Survey, Retrieval Date = SEPTEMBER 28, 2002 KT1969 *********************************************************************** KT1969 DESIGNATION - MOUNT SANHEDRIN RESET KT1969 PID - KT1969 KT1969 STATE/COUNTY- CA/MENDOCINO KT1969 USGS QUAD - SANHEDRIN MTN (1994) KT1969 KT1969 *CURRENT SURVEY CONTROL KT1969 ___________________________________________________________________ KT1969* NAD 83(1992)- 39 30 57.18121(N) 123 05 46.43992(W) ADJUSTED KT1969* NAVD 88 - 1885.6 (meters) 6186. (feet) VERTCON KT1969 ___________________________________________________________________ KT1969 EPOCH DATE - 1991.35 KT1969 LAPLACE CORR- 9.69 (seconds) DEFLEC99 KT1969 GEOID HEIGHT- -28.45 (meters) GEOID99 KT1969 KT1969 HORZ ORDER - FIRST KT1969 KT1969.The horizontal coordinates were established by classical geodetic methods KT1969.and adjusted by the National Geodetic Survey in March 1994. KT1969.The horizontal coordinates are valid at the epoch date displayed above. KT1969.The epoch date for horizontal control is a decimal equivalence KT1969.of Year/Month/Day. KT1969 KT1969.The NAVD 88 height was computed by applying the VERTCON shift value to KT1969.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) KT1969 KT1969.The Laplace correction was computed from DEFLEC99 derived deflections. KT1969 KT1969.The geoid height was determined by GEOID99. KT1969 KT1969; North East Units Scale Converg. KT1969;SPC CA 2 - 705,844.746 1,905,738.356 MT 0.99994293 -0 41 28.1 KT1969;SPC CA 2 - 2,315,758.97 6,252,409.92 sFT 0.99994293 -0 41 28.1 KT1969;UTM 10 - 4,374,031.710 491,727.838 MT 0.99960084 -0 03 40.4 KT1969 KT1969: Primary Azimuth Mark Grid Az KT1969:SPC CA 2 - MOUNT SANHEDRIN AZ MK 085 53 46.2 KT1969:UTM 10 - MOUNT SANHEDRIN AZ MK 085 15 58.5 KT1969 KT1969|---------------------------------------------------------------------| KT1969| PID Reference Object Distance Geod. Az | KT1969| dddmmss.s | KT1969| KT1966 POISON ROCK LOOKOUT TOWER APPROX.24.3 KM 0132435.5 | KT1969| KT1957 ANTHONY PEAK LOOKOUT TOWER APPROX.38.4 KM 0170444.6 | KT1969| KT1971 MOUNT SANHEDRIN RM 1 20.828 METERS 07355 | KT1969| DB5507 MOUNT SANHEDRIN AZ MK 0851218.1 | KT1969| KT1950 HULL MOUNTAIN LOOKOUT TOWER APPROX.13.7 KM 0870733.0 | KT1969| DB5508 MOUNT SANHEDRIN RM 2 RESET 16.139 METERS 13353 | KT1969| DB5588 BIG SIGNAL LOOKOUT 1894623.7 | KT1969| KT2124 CAHTO LOOKOUT TOWER APPROX.45.8 KM 2942953.6 | KT1969| DB5509 MOUNT SANHEDRIN RM 2 6.788 METERS 33712 | KT1969|---------------------------------------------------------------------| KT1969 KT1969 SUPERSEDED SURVEY CONTROL KT1969 KT1969 NAD 83(1986)- 39 30 57.16949(N) 123 05 46.42978(W) AD(1984.00) 1 KT1969 NAD 27 - 39 30 57.60218(N) 123 05 42.40057(W) AD( ) 1 KT1969 NGVD 29 - 1884.6 (m) 6183. (f) VERT ANG KT1969 KT1969.Superseded values are not recommended for survey control. KT1969.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. KT1969.See file dsdata.txt to determine how the superseded data were derived. KT1969 KT1969 HISTORY - Date Condition Report By KT1969 HISTORY - 1925 MONUMENTED CGS KT1969 HISTORY - 1925 SEE DESCRIPTION CGS KT1969 HISTORY - 1942 SEE DESCRIPTION CGS KT1969 HISTORY - 1949 SEE DESCRIPTION CGS KT1969 HISTORY - 1964 SEE DESCRIPTION CGS KT1969 HISTORY - 1964 SEE DESCRIPTION CGS KT1969 KT1969 STATION DESCRIPTION KT1969 KT1969'DESCRIBED BY COAST AND GEODETIC SURVEY 1925 KT1969'ON HIGHEST POINT OF MOUNT SANHEDRIN (ALSO KNOWN AS BIG KT1969'SIGNAL PEAK). TO REACH FROM POTTER VALLEY, FOLLOW ROAD KT1969'TO EEL RIVER, CROSS FERRY AND FOLLOW GRAVELLY VALLEY ROAD KT1969'5 MILES TO OLD SAWMILL SITE (1/2 MILE BEYOND SUMMIT), FOLLOW KT1969'TRAIL TO SANHEDRIN FIRE LOOKOUT TOWER, CONTINUE ON TRAIL KT1969'TOWARD BURGESS CAMP TO FOOT OF N SIDE OF PEAK, AND GO UP KT1969'RIDGE TO STATION SITE. THE FIRST-ORDER GEODETIC POSITION KT1969'OF THE STATION WAS DETERMINED IN 1880. ORIGINALLY MARKED KT1969'BY GLASS BOTTLE EMBEDDED IN BASE OF CONCRETE PIER AND BY A KT1969'SCREW IN WOODEN CORE IN TOP OF PIER. TOP OF BOTTLE WAS 3.60 KT1969'FEET BELOW TOP OF PIER. NAILS WERE DRIVEN INTO STUMPS AT KT1969'FOLLOWING DISTANCES AND AZIMUTHS FROM STATION--5 FEET 1 INCH, KT1969'101 DEG 00 MIN. 7 FEET 1-1/2 INCHES, 155 DEG 30 MIN. AND KT1969'5 FEET, 225 DEG 30 MIN. IN 1925--BRONZE DISK WAS PLACED KT1969'IN TOP OF CONCRETE PIER. NONE OF THE REFERENCE STUMPS KT1969'WERE RECOVERED. KT1969 KT1969 STATION RECOVERY (1942) KT1969 KT1969'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1942 (JCS) KT1969'THE STATION IS LOCATED ABOUT 13 MILES, AIR LINE, N OF POTTER KT1969'VALLEY, ON THE HIGHEST POINT OF MOUNT SANHEDRIN WHICH IS KT1969'COMMONLY KNOWN AS BIG SIGNAL PEAK AND ON THE SAME POINT AS KT1969'THE BIG SIGNAL LOOKOUT TOWER. KT1969' KT1969'THE STATION IS A BRONZE DISK SET IN THE TOP OF A CONCRETE KT1969'PIER WHICH PROJECTS 4 FEET AND IS 2 FEET N OF THE N SIDE KT1969'OF THE LOOKOUT HOUSE. IT IS STAMPED MOUNT SANHEDRIN 1878 KT1969'1925. THIS MARK WAS RECOVERED AND FOUND TO BE IN EXCELLENT KT1969'CONDITION. KT1969' KT1969'REFERENCE MARK NO. 1 IS A BRONZE DISK CEMENTED IN A DRILL KT1969'HOLE IN OUTCROPPING BEDROCK WHICH PROJECTS 3 FEET AND IS KT1969'ENE BY E AND 7 FEET LOWER. STAMPED MOUNT SANHEDRIN NO. 1 1942. KT1969' KT1969'REFERENCE MARK NO. 2 IS NW BY N AND 5 FEET LOWER THAN THE KT1969'STATION MARK. IT IS A BRONZE DISK CEMENTED IN A DRILL HOLE KT1969'IN OUTCROPPING BEDROCK AND STAMPED MOUNT SANHEDRIN NO. 2 1942. KT1969' KT1969'TO REACH THE STATION FROM THE POST OFFICE AT POTTER VALLEY KT1969'GO E 0.5 MILE TO HOPPERS CORNER. TURN LEFT, N, GO 4.1 MILES KT1969'TO FORKS. TAKE THE LEFT FORK FOR 0.9 MILES TO A ROAD COMING KT1969'IN FROM THE RIGHT. TURN BACK SHARP RIGHT AND GO 1.1 MILES KT1969'TO THE UKIAH PINE AND LUMBER COMPANY OFFICE ON THE RIGHT. KT1969'CONTINUE STRAIGHT AHEAD ACROSS THE EEL RIVER BRIDGE TO A KT1969'T-ROAD. TURN RIGHT, E, GO 0.2 MILE TO FORKS. TAKE THE KT1969'LEFT FORK SIGN PRESLEY RANCH, GO 1.3 MILE TO THE PRESLEY KT1969'RANCH ON THE LEFT. NOTE--ARRANGEMENTS FOR PACK HORSES MAY KT1969'BE MADE WITH CHARLES PRESLEY AND A KEY TO A LOCKED GATE MAY KT1969'BE OBTAINED FROM MRS. THROUGH MR. PRESLEY. FROM THE KT1969'PRESLEY RANCH CONTINUE UPGRADE IN A NORTHERLY DIRECTION 3.0 KT1969'MILES TO FORKS AND A SHEET IRON BUILDING. TAKE THE LEFT KT1969'FORK AND CONTINUE UPGRADE NORTHERLY FOR 3.6 MILES TO A KT1969'POINT WHERE THE ROAD ENDS AND THE END OF TRUCK TRAVEL. KT1969'FROM HERE FOLLOW A WELL-DEFINED TRAIL NORTHWARD ABOUT 4 KT1969'MILES TO THE SUMMIT OF LITTLE SIGNAL PEAK. TAKE THE LEFT KT1969'FORK NW 4 MILES TO THE SUMMIT OF BIG SIGNAL PEAK AND THE KT1969'STATION AT THE BIG SIGNAL LOOKOUT HOUSE. A 4 1/2-HOUR KT1969'HORSE PACK. KT1969' KT1969'IF HORSES ARE NOT AVAILABLE THE FOLLOWING ROUTE SHOULD BE KT1969'TAKEN, WHICH WAS THE ROUTE OF THE RECONNAISSANCE PARTY--FROM KT1969'THE EEL RIVER BRIDGE MENTIONED IN THE ABOVE GO 0.2 MILE TO KT1969'FORKS. KEEP THE RIGHT FORK AND GO UP THE EEL RIVER 8.4 MILES KT1969'TO A TELEPHONE BOX ON THE LEFT. CONTINUE 0.5 MILE TO A ROAD KT1969'LEADING LEFT AT AN OIL BARREL MAIL BOX. TURN LEFT AND FOLLOW KT1969'AN OLD LOGGING ROAD (UKIAH PINE AND LUMBER COMPANY) NNW TO KT1969'A FOREST SERVICE SIGN BEAR CAMP-SODA CREEK-BIG SIGNAL KT1969'L.O.--CONTINUE ON THE MAIN-TRAVELED ROAD 3.2 MILES TO THE UKIAH KT1969'PINE AND LUMBER COMPANY CAMP. FROM THE CAMP FOLLOW THE KT1969'MAIN ROAD APPROXIMATELY 0.3 MILE TO A SADDLE AND THE KT1969'END OF TRUCK TRAVEL. PACK SOUTHERLY FOR ABOUT 200 YARDS TO KT1969'WHERE THE SKIDWAY INTERSECTS AN OLD TRAIL. FOLLOW KT1969'THIS TRAIL ABOUT 1-1/2 MILES TO THE TOP OF LITTLE SIGNAL KT1969'PEAK AND AN OLD LOOKOUT HOUSE. CONTINUE W 300 YARDS TO KT1969'FORKS IN TRAIL, THENCE THE RIGHT FORK AND CONTINUE AS KT1969'ABOVE TO THE SUMMIT OF BIG SIGNAL PEAK AND THE STATION. A KT1969'4-HOUR PACK. KT1969 KT1969 STATION RECOVERY (1949) KT1969 KT1969'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1949 (WRH) KT1969'THE STATION WAS RECOVERED AS DESCRIBED AND THE MARKS WERE KT1969'FOUND TO BE IN GOOD CONDITION. REFERENCE MARK NUMBER 1, WHICH KT1969'APPARENTLY WAS SET IN 1925 BUT NOT DESCRIBED, A NEWLY ESTABLISHED KT1969'REFERENCE MARK AND A NEWLY ESTABLISHED AZIMUTH MARK ARE DESCRIBED KT1969'BELOW. A COMPLETE DESCRIPTION FOLLOWS-- KT1969' KT1969'THE STATION IS LOCATED ON THE HIGHEST POINT OF MOUNT SANHEDRIN, KT1969'UPON WHICH THE BIG SIGNAL LOOKOUT IS LOCATED, ABOUT 13-1/2 KT1969'MILES AIRLINE NORTH OF POTTER VALLEY, ABOUT 10 MILES AIRLINE KT1969'NORTHWEST OF HULLVILLE AND ABOUT 5 MILES AIRLINE EAST-NORTHEAST KT1969'OF HEARST. KT1969' KT1969'TO REACH THE STATION FROM THE POST OFFICE IN POTTER VALLEY, KT1969'GO EAST ON THE MAIN STREET FOR 0.5 MILE TO A FORK. TURN KT1969'LEFT AS PER SIGN LAKE PILLSBURY 18 AND GO 4.4 MILES TO A KT1969'FORK. TURN RIGHT AS PER SIGN UPPER DAM 14 AND GO 0.5 MILE KT1969'TO A FORK. KEEP STRAIGHT AHEAD, RIGHT, AS PER SIGN PILLSBURY KT1969'LAKE AND GO 0.6 MILE TO A T-ROAD JUST PAST A BRIDGE. TURN KT1969'LEFT AS PER SIGN CAHILLS AND GO 0.1 MILE TO A CROSS ROAD. KT1969'TURN SHARP RIGHT AND GO 23.9 MILES TO A FORK AND A SIGN 23. KT1969'KEEP STRAIGHT AHEAD, RIGHT, AND GO 0.6 MILE TO A SIDE ROAD KT1969'AND A CABIN ON THE LEFT. TURN LEFT, UPHILL, AND GO 0.3 MILE KT1969'TO A FORK. TURN LEFT AND GO 1.2 MILES TO THE CREST OF A KT1969'RIDGE AND THE END OF THE ROAD. TURN LEFT, SOUTHEAST, ON A KT1969'DIM JEEP ROAD AND GO 1.8 MILES ALONG THE TOP OF THE KT1969'RIDGE TO THE STATION AND THE BIG SIGNAL LOOKOUT ON THE KT1969'HIGHEST POINT OF THE MOUNTAIN. KT1969' KT1969'THE STATION MARK IS A STANDARD DISK STAMPED MOUNT SANHEDRIN KT1969'1878 1925 SET IN THE TOP OF A 2-FOOT SQUARE ROCK AND CONCRETE KT1969'PIER THAT PROJECTS 3.6 FEET ABOVE THE GROUND. KT1969' KT1969'REFERENCE MARK NUMBER 1 IS A STANDARD DISK STAMPED MOUNT KT1969'SANHEDRIN NO 1 1925 SET IN A DRILL HOLE IN OUTCROPPING BEDROCK KT1969'THAT PROJECTS ABOUT 2 FEET ABOVE THE GROUND. IT IS ABOUT KT1969'6 FEET LOWER THAN THE STATION. KT1969' KT1969'REFERENCE MARK NUMBER 2 IS A STANDARD DISK STAMPED MOUNT KT1969'SANHEDRIN NO 2 1880 SET IN A DRILL HOLE IN OUTCROPPING BEDROCK KT1969'THAT PROJECTS ABOUT 4 INCHES ABOVE THE GROUND. IT IS 3.12 KT1969'METERS LOWER THAN THE STATION. KT1969' KT1969'THE AZIMUTH MARK IS A STANDARD DISK STAMPED MOUNT SANHEDRIN KT1969'1880 SET IN A DRILL HOLE IN A LARGE BOULDER THAT PROJECTS KT1969'ABOUT 6 FEET ABOVE THE GROUND. IT IS LOCATED ON THE EAST KT1969'SLOPE AND NEAR THE TOP OF A ROCKY AND TREE-COVERED HILL KT1969'THAT IS ABOUT 1/4 MILE EAST OF THE STATION. TO REACH THE KT1969'AZIMUTH MARK FROM THE STATION, PACK EAST ABOUT 1/4 MILE KT1969'ALONG THE TOP OF A RIDGE TO THE TOP OF A SMALL HILL AND THE KT1969'AZIMUTH MARK. KT1969' KT1969'THE BIG SIGNAL LOOKOUT IS A STANDARD LOOKOUT HOUSE OF WOODEN KT1969'CONSTRUCTION. IT IS SUPPORTED BY CONCRETE BLOCKS THAT RAISE KT1969'THE FLOOR OF THE LOOKOUT ABOUT 4 FEET ABOVE THE GROUND. KT1969 KT1969 STATION RECOVERY (1964) KT1969 KT1969'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1964 (EHS) KT1969'THE STATION MARK WAS DESTROYED IN 1961 WHEN THE OLD LOOKOUT KT1969'TOWER WAS REMOVED AND THE NEW LOOKOUT TOWER, BUILT OF CONCRETE KT1969'BLOCKS AND WITH A CONCRETE SLAB FLOOR, WAS BUILT OVER THE MARKS KT1969'LOCATION. THE AZIMUTH MARK AND REFERENCE MARK NUMBER 1 KT1969'WERE RECOVERED IN GOOD CONDITION. REFERENCE MARK NUMBER KT1969'2 (1942) AND REFERENCE MARK NUMBER 2 (1949) WERE NOT FOUND KT1969'AND HAVE EITHER BEEN COVERED OVER OR DESTROYED. KT1969 KT1969 STATION RECOVERY (1964) KT1969 KT1969'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1964 (JJL) KT1969'THE AZIMUTH MARK AND REFERENCE MARK NO. 1 WERE RECOVERED AS KT1969'DESCRIBED AND FOUND IN GOOD CONDITION. IT IS BELIEVED THE KT1969'STATION MARK WAS DESTROYED DURING THE CONSTRUCTION OF THE KT1969'LOOKOUT TOWER THAT IS NOW ATOP THE MOUNTAIN. KT1969' KT1969'TRIANGULATION STATION MOUNT SANHEDRIN 2 WAS ESTABLISHED.