National Geodetic Survey, Retrieval Date = JANUARY 9, 2005 EW7681 *********************************************************************** EW7681 DESIGNATION - THORN EW7681 PID - EW7681 EW7681 STATE/COUNTY- CA/VENTURA EW7681 USGS QUAD - LION CANYON (1991) EW7681 EW7681 *CURRENT SURVEY CONTROL EW7681 ___________________________________________________________________ EW7681* NAD 83(1992)- 34 36 22.82995(N) 119 07 39.51645(W) ADJUSTED EW7681* NAVD 88 - 2115.2 (meters) 6940. (feet) VERTCON EW7681 ___________________________________________________________________ EW7681 EPOCH DATE - 1991.35 EW7681 LAPLACE CORR- 1.54 (seconds) DEFLEC99 EW7681 GEOID HEIGHT- -32.20 (meters) GEOID03 EW7681 EW7681 HORZ ORDER - SECOND EW7681 EW7681.The horizontal coordinates were established by classical geodetic methods EW7681.and adjusted by the National Geodetic Survey in June 1996. EW7681.The horizontal coordinates are valid at the epoch date displayed above. EW7681.The epoch date for horizontal control is a decimal equivalence EW7681.of Year/Month/Day. EW7681 EW7681.The NAVD 88 height was computed by applying the VERTCON shift value to EW7681.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) EW7681 EW7681.The Laplace correction was computed from DEFLEC99 derived deflections. EW7681 EW7681.The geoid height was determined by GEOID03. EW7681 EW7681; North East Units Scale Factor Converg. EW7681;SPC CA 5 - 623,300.614 1,896,578.823 MT 0.99992530 -0 38 34.0 EW7681;SPC CA 5 - 2,044,945.43 6,222,359.02 sFT 0.99992530 -0 38 34.0 EW7681;UTM 11 - 3,831,447.067 304,907.738 MT 1.00006915 -1 12 31.5 EW7681 EW7681! - Elev Factor x Scale Factor = Combined Factor EW7681!SPC CA 5 - 0.99967312 x 0.99992530 = 0.99959845 EW7681!UTM 11 - 0.99967312 x 1.00006915 = 0.99974225 EW7681 EW7681: Primary Azimuth Mark Grid Az EW7681:SPC CA 5 - THORN AZ MK 065 45 33.6 EW7681:UTM 11 - THORN AZ MK 066 19 31.1 EW7681 EW7681|---------------------------------------------------------------------| EW7681| PID Reference Object Distance Geod. Az | EW7681| dddmmss.s | EW7681| CC2012 THORN AZ MK 0650659.6 | EW7681| EW7621 TOPATOPA LOOKOUT APPROX.14.8 KM 1200810.0 | EW7681| CC2013 THORN RM 1 6.887 METERS 17702 | EW7681| CC2014 THORN RM 2 13.347 METERS 26015 | EW7681| EW7680 THORN MOUNT LOOKOUT TOWER 47.208 METERS 29027 | EW7681|---------------------------------------------------------------------| EW7681 EW7681 SUPERSEDED SURVEY CONTROL EW7681 EW7681 NAD 83(1986)- 34 36 22.83495(N) 119 07 39.50856(W) AD(1984.00) 2 EW7681 NAD 27 - 34 36 22.87520(N) 119 07 36.12460(W) AD( ) 2 EW7681 NGVD 29 (07/19/86) 2114.3 (m) 6937. (f) VERT ANG EW7681 EW7681.Superseded values are not recommended for survey control. EW7681.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. EW7681.See file dsdata.txt to determine how the superseded data were derived. EW7681 EW7681_U.S. NATIONAL GRID SPATIAL ADDRESS: 11SLU0490831447(NAD 83) EW7681_MARKER: Z = SEE DESCRIPTION EW7681_SETTING: 66 = SET IN ROCK OUTCROP EW7681 EW7681 HISTORY - Date Condition Report By EW7681 HISTORY - 1941 MONUMENTED CGS EW7681 HISTORY - 1978 GOOD CA-111 EW7681 EW7681 STATION DESCRIPTION EW7681 EW7681'DESCRIBED BY COAST AND GEODETIC SURVEY 1941 (JCS) EW7681'STATION LOCATED IN THE LOS PADRES NATIONAL FOREST, ON A PROMINENT EW7681'RUGGED SUMMIT OF A SANDSTONE RIDGE AND THE SAME POINT AS THE EW7681'THORN MOUNT LOOKOUT TOWER, ABOUT 9 MILES S OF LOCKWOOD VALLEY, EW7681'1-1/2 MILES SW OF THORN MEADOWS CAMP AND 15-1/2 MILES SW OF EW7681'CHUCHUPATE RANGER STATION. THE MARK IS ON A HUGE ROCK PROJECTION EW7681'ESE 154.890 FEET, 47.212 METERS OF THE LOOKOUT TOWER. STAMPED EW7681'THORN 1941. EW7681' EW7681'STATION, REFERENCE, AND AZIMUTH MARKS ARE STANDARD BRONZE DISKS EW7681'WEDGED IN DRILL HOLES IN OUTCROPPING BEDROCK. EW7681' EW7681'REFERENCE MARK NO. 1 IS 6 FEET LOWER THAN THE STATION MARK. IT EW7681'IS STAMPED THORN NO. 1 1941. EW7681' EW7681'REFERENCE MARK NO. 2 IS 15 FEET LOWER THAN THE STATION MARK. IT EW7681'IS STAMPED THORN NO. 2 1941. EW7681' EW7681'THE AZIMUTH MARK IS 200 FEET LOWER THAN THE STATION, 100 FEET EW7681'E OF THE TRAIL, ON A ROCK PROJECTION. IT IS STAMPED THORN EW7681'1941. EW7681' EW7681'TO REACH FROM GORMAN GO N ON U.S. HIGHWAY 99 FOR 2.6 MILES, TURN EW7681'LEFT AT SIGN FRAZIER PARK ROAD, GO 0.15 MILE, TURN LEFT AT SIGN EW7681'LOCKWOOD VALLEY, FRAZIER PARK, GO 4.0 MILES TO FRAZIER PARK, EW7681'CONTINUE ON THE MAIN-TRAVELED HIGHWAY 4.7 MILES TO THE EW7681'CHUCHUPATE RANGER STATION ON LEFT, CONTINUE WESTWARD ON THE EW7681'MAIN-TRAVELED ROAD FOR 10.0 MILES TO A FORK AND SIGN PIRU EW7681'CREEK-6, PINE SPRINGS-3, GRADE VALLEY-6, TURN OFF THE EW7681'MAIN-TRAVELED ROAD AND TAKE THE LEFT FORK, SOUTHERLY, FOR 2.7 EW7681'MILES TO SIGN PINE SPRING 1 MILE AND FORK, TAKE LEFT FORK EW7681'STRAIGHT AHEAD FOR 3.6 MILES TO A PUBLIC CAMP GROUNDS, KEEP EW7681'STRAIGHT AHEAD FOR 0.8 MILE TO A FORK AND SIGN THORN EW7681'MEADOWS, TAKE RIGHT FORK AND GO 1.5 MILES TO THORN MEADOWS EW7681'PUBLIC CAMP GROUNDS AND END OF TRUCK TRAVEL. FOLLOW THE TRAIL EW7681'WHICH TAKES OFF JUST OPPOSITE THE HITCHING RACK AND LEADS EW7681'UP WASH ALONG TELEPHONE LINE FOR 1-1/2 MILES, THENCE TO LEFT EW7681'UP STEEP RIDGE TO THORN LOOKOUT TOWER AND STATION. A 2 EW7681'1/2-HOUR PACK. EW7681 EW7681 STATION RECOVERY (1978) EW7681 EW7681'RECOVERY NOTE BY VENTURA COUNTY CALIFORNIA 1978 (RRW) EW7681'THE STATION MARK AND REFERENCE MARKS 1 AND 2 WERE RECOVERED IN GOOD EW7681'CONDITION AS DESCRIBED. THE STATION WAS REACHED BY HELICOPTER.