National Geodetic Survey, Retrieval Date = OCTOBER 6, 2001 LT0688 *********************************************************************** LT0688 DESIGNATION - LASSEN LT0688 PID - LT0688 LT0688 STATE/COUNTY- CA/SHASTA LT0688 USGS QUAD - LASSEN PEAK (1995) LT0688 LT0688 *CURRENT SURVEY CONTROL LT0688 ___________________________________________________________________ LT0688* NAD 83(1992)- 40 29 17.42300(N) 121 30 18.02803(W) ADJUSTED LT0688* NAVD 88 - 3188.7 (meters) 10462. (feet) VERTCON LT0688 ___________________________________________________________________ LT0688 EPOCH DATE - 1991.35 LT0688 LAPLACE CORR- 4.17 (seconds) DEFLEC99 LT0688 GEOID HEIGHT- -23.70 (meters) GEOID99 LT0688 LT0688 HORZ ORDER - SECOND LT0688 LT0688.The horizontal coordinates were established by classical geodetic methods LT0688.and adjusted by the National Geodetic Survey in March 1994. LT0688.The horizontal coordinates are valid at the epoch date displayed above. LT0688.The epoch date for horizontal control is a decimal equivalence LT0688.of Year/Month/Day. LT0688 LT0688.The NAVD 88 height was computed by applying the VERTCON shift value to LT0688.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) LT0688 LT0688.The Laplace correction was computed from DEFLEC99 derived deflections. LT0688 LT0688.The geoid height was determined by GEOID99. LT0688 LT0688; North East Units Scale Converg. LT0688;SPC CA 1 - 628,348.926 2,041,962.871 MT 0.99991286 +0 19 25.2 LT0688;SPC CA 1 - 2,061,508.10 6,699,339.85 sFT 0.99991286 +0 19 25.2 LT0688;UTM 10 - 4,483,015.338 626,700.985 MT 0.99979760 +0 58 14.9 LT0688 LT0688: Primary Azimuth Mark Grid Az LT0688:SPC CA 1 - LASSEN AZ MK 196 13 44.6 LT0688:UTM 10 - LASSEN AZ MK 195 34 54.9 LT0688 LT0688|---------------------------------------------------------------------| LT0688| PID Reference Object Distance Geod. Az | LT0688| dddmmss.s | LT0688| LT0689 10451 VA 1.532 METERS 07731 | LT0688| LASSEN RM 1 3.795 METERS 16845 | LT0688| LASSEN AZ MK 1963309.8 | LT0688| LASSEN RM 2 4.435 METERS 25102 | LT0688|---------------------------------------------------------------------| LT0688 LT0688 SUPERSEDED SURVEY CONTROL LT0688 LT0688 NAD 83(1986)- 40 29 17.42663(N) 121 30 18.02917(W) AD(1984.00) 2 LT0688 NAD 27 - 40 29 17.85200(N) 121 30 14.09900(W) AD( ) 2 LT0688 NGVD 29 - 3187.4 (m) 10457. (f) VERT ANG LT0688 LT0688.Superseded values are not recommended for survey control. LT0688.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. LT0688.See file dsdata.txt to determine how the superseded data were derived. LT0688 LT0688_MARKER: DO = NOT SPECIFIED OR SEE DESCRIPTION LT0688_SETTING: 66 = SET IN ROCK OUTCROP LT0688 LT0688 HISTORY - Date Condition Report By LT0688 HISTORY - 1948 MONUMENTED CGS LT0688 HISTORY - 1972 SEE DESCRIPTION NGS LT0688 LT0688 STATION DESCRIPTION LT0688 LT0688'DESCRIBED BY COAST AND GEODETIC SURVEY 1948 (WRH) LT0688'THE STATION IS LOCATED ON THE HIGHEST POINT OF LASSEN PEAK, LT0688'IN LASSEN VOLCANIC NATIONAL PARK. THE PEAK IS WELL KNOWN AND LT0688'THE MOST PROMINENT IN THE VICINITY. A WIDE AND WELL KEPT TRAIL LT0688'LEADS TO THE SUMMIT BUT PACK ANIMALS ARE GENERALLY NOT LT0688'PERMITTED. THE VOLCANIC ACTIVITY ON THIS MOUNTAIN IS NOW LT0688'PRACTICALLY UNNOTICABLE, BUT AN OCCASIONAL ISSUE OF STEAM LT0688'STILL COMES FROM THE MOUNTAIN SIDE ABOUT 200 YARDS NORTHWEST LT0688'OF THE STATION. LT0688' LT0688'THE STATION MARK, STAMPED LASSEN 1948, IS A STANDARD DISK SET LT0688'IN OUTCROPPING BEDROCK THAT PROJECTS 18 INCHES. THERE ARE LT0688'BOULDERS PROJECTING HIGHER AROUND IT. LT0688' LT0688'REFERENCE MARK NUMBER 1, STAMPED LASSEN NO 1 1948, IS A LT0688'STANDARD DISK SET IN A BOULDER THAT PROJECTS 12 INCHES AND IS 6 LT0688'INCHES LOWER THAN THE STATION. LT0688' LT0688'REFERENCE MARK NUMBER 2, STAMPED LASSEN NO 2 1948, IS A LT0688'STANDARD DISK SET IN A BOULDER THAT PROJECTS 6 INCHES AND IS LT0688'30 INCHES LOWER THAN THE STATION. LT0688' LT0688'THE AZIMUTH MARK, STAMPED LASSEN 1948, IS A STANDARD DISK SET LT0688'IN A BOULDER 9 BY 7 FEET AND PROJECTING 3-1/2 FEET. IT IS 30 LT0688'FEET NORTHWEST OF THE CENTERLINE OF THE HIGHWAY, 300 FEET LT0688'SOUTHWEST OF LAKE HELEN AND 300 FEET NORTHEAST OF A HIGHWAY LT0688'COMFORT STATION. TO REACH FROM THE START OF THE TRAIL TO THE LT0688'STATION, GO SOUTHWEST ON THE HIGHWAY TOWARDS RED BLUFF FOR 01.1 LT0688'MILES TO THE AZIMUTH MARK ON THE RIGHT. LT0688' LT0688'THE USGS BM, STAMPED 10451 VA, IS SET IN A DRILL HOLE ON THE LT0688'HIGHEST BOULDER ON THE MOUNTAIN THAT PROJECTS 6 FEET ABOVE THE LT0688'GROUND. THE MARK IS BADLY BATTERED, THE CEMENT HAS CHIPPED LT0688'OUT FROM UNDER IT AND THE BOULDER IT IS IN IS LOOSE AND WILL LT0688'FALL OVER IN THE NEAR FUTURE. LT0688' LT0688'THE STATION IS REACHED AS FOLLOWS--FROM THE JUNCTION OF LASSEN LT0688'VOLCANIC NATIONAL PARK HIGHWAY (89) AND STATE HIGHWAY 36, LT0688'TAKE PARK HIGHWAY 89 NORTH FOR 5.0 MILES TO THE PARK CHECKING LT0688'STATION. CONTINUE NORTH AND NORTHEAST ON THE PARK HIGHWAY LT0688'FOR 7.7 MILES TO A LARGE PARKING AREA AT THE FOOT OF MT. LASSEN LT0688'TRAIL. THE DISTANCE TO THE TOP ON THE TRAIL IS 2.5 MILES AND LT0688'THE GRADE IS AROUND 15 PER. CT. LT0688 LT0688 STATION RECOVERY (1972) LT0688 LT0688'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1972 (PRL) LT0688'THE STATION AND R.M. 1 WERE RECOVERED AS DESCRIBED. R.M. 2 LT0688'WAS SEARCHED FOR AND NOT FOUND. THE AZIMUTH MARK WAS NOT LT0688'SEARCHED FOR. LT0688' LT0688'THE DESCRIPTION IS ADEQUATE. LT0688' LT0688'HEIGHT OF LIGHT ABOVE STATION MARK 5 FEET. LT0688' LT0688'AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--5 MILES LT0688'SOUTHEAST OF MANZANITA LAKE.